Running parity check so far has reported 50 sync errors corrected. The 'Parity Swap' procedure will copy the parity info from the current 2TB parity drive to the 4TB drive, zero the rest, make it the new parity drive, then use the old 2TB parity drive to replace the 1TB data drive. May 5, 2010 · At this point I think it makes sense to purchase a 1. Jan 31, 2021 · Larger drives are more efficient in several ways, so buy the cheapest per GB skewing heavily towards the larger drive. Test 3. To keep dual parity and be able to store all data, 5 disks are needed. Unraid will clear the disk which will make it consistent with existing parity, then you can format it. Posted January 1, 2017. That assumes no VM's, possibly a container or 2. Finally, here is a picture of all the drives used minus the Toshiba drive used from previous tests. these limits are hard-coded in unRAID and are what Limetech have decided to allow for a particular license type. I'm unsure on how to trouble shoot the cause of the constant spinning of the drives Stop array, set the 2tb parity as a data drive. (Parity is not backup). It cannot be smaller. 9 and my parity drive and disk 1 are constantly running and never spin down. 2 parity drives = lose any two drives and you're still running. I just purchased 2 8TB WD Red disks and I'm…. Curious to learn about the 2nd parity drive. On 3/11/2016 at 4:01 PM, Zepius said: I'm using unRAID 6. Assuming no data disk fails while parity is being built, as you would running an unprotected array during that phase. So, in summary: 1. One of the original drives (4TB Seagate) is over 90% full. was wondering how to recover the data on the disabled drives. When I created the array in the first place, my thought was to keep the 2 parity drives until the point when I needed the extra storage drive space then convert parity drive 2 over to a storage drive (ie Jan 31, 2023 · 2b) You could have all SSDs for data and a spinning drive for parity but that defeats the purpose of an all SSD machine. When a drive is added to a parity-protected Unraid array, it is first cleared by writing zeroes to all bits of all sectors of that drive. black Hey there. You always lose the number of drives dedicated to parity. Jul 30, 2019 · The smart reports for both drives do not indicate any issues. No parity = lose any single drive and the array is down, but data on other drives is recoverable. Since upgrading to 6. Also i notice that it doesn't show me the disk it was supposed to be under disk 10 please see screenshot. Balancing Disk Space Among Shares/Disks. Personally I think once you go beyond 10-12 data drives, you should have a second parity drive, so in my monster unRAID server where I have 27 data drives, I have two parity drives, but there is no rule, you can have two parity drives with only six data Nov 27, 2020 · 1 hard drive as parity. wait for formatting to complete. With single parity and no backups you're hoping two drives don't fail. Unraid is unlike traditional RAID for a few reasons. Stable Releases. And mount it as parity 1. So even a single file could exist on more than one drive. This will cause Unraid to initiate a Clear of disk2 (the old parity drive) and when it is completed you can the format the drive in preparation to using it. Which means that, if you fear to lose more drives than one at the same time, add another parity. Let's say 8TB drives are $20 / TB, and 10TB are $19 / TB, but 16TB are $21 / TB. 6. If your largest single data drive will be a 1TB drive, and if you have 20 data drives of 1TB or smaller sizes, then the parity drive Jun 22, 2019 · When I set up my server originally I created it with 2 parity drives #1, and #2 each 12 TB. Then a drive failed, and during the rebuild, a second drive failed. 17 spinners with dual parity (2 parity RAID and/or the parity protection of unRAID is not a backup, it's for availability. There have been a few reports of certain motherboards / disk controllers "hiding" a very small amount of space on a disk drive. It will help you understand why the drive doesn't have to be any larger than the largest drive. I agree that upgrading to bigger disks is the right move. Parity drives must be as large as the largest data drive in your array. Mar 1, 2023 · guess than I just need to remove the parity 2 - wipe it. What I tried so far: Swap parity positions, Unassigning one of them and re-adding to the drive pool, Swapping with a data drive. If your first parity drive were 7200 RPM and you added a 5400 RPM drive as a second parity drive you'd see a speed difference with certain operations. TL,DR: yes, you understood it correctly 😉. May 8, 2022 · If you are the kind of person to let things go as long as they seem to be working fine, and only act when there are obvious signs of trouble, then 2 parity drives could possibly save your bacon. Your data drives are 3TB so your parity should be at least 3 TB. Jan 20, 2024 · Parity (even dual) is never a substitute for backup whether using Unraid or some more traditional RAID implementation. 1 parity, 6 data drives. Hope someone can confirm or correct me if I am wrong. 12, it's worth exploring various storage scenarios and their implications. Jul 25, 2020 · The parity calculation provides the data for the replaced disk, whether replacing parity or data. Longer version: In layman’s term Unraid works like „JBOD with Parity“ (not 100% accurate but close) So add as many drives as you want, in as different sizes as you want and you will get 1 big storage (array) with 100% space of all the individual drives. Parity drive in unRAID context means server uptime. In addition you can have any number of drives not part of the array or cache. Nov 19, 2018 · Is this the best method (assuming server is turned OFF): 1) Remove current 2TB parity drive and install brand new 8TB drive (I'm using hot swap bay) 2) Turn server ON. The disk is part of a share with 6 other disks (Movies). On 3/1/2023 at 2:59 AM, patrickstigler said: No data will be lost, I hope. Thanks for the replies guys. and 2 data Drives each 12 TB. I was running out of space so I just added 2 more 14TB drives to the system, giving me 6 14TB drives with 1 parity drive. No, unraid is not like raid, hence the name. (unlikely) Aug 27, 2019 · I originally had a 1 TB and 2TB HDD as my parity drives and 3 1TB hard drives for my data. Background: Dual Parity system previously 4TB drives, now 6TB, only 6TB in system are the parity drives Did a swap for Parity 1 - Copy Successful, rebuild successful Did a swap for Parity 2 - Copy Successful, rebuild currently running Get aler You have a 2TB parity drive. I think this answer may need clarification. zrog2000. With double parity and no backups you're hoping three drives don't fail. I can create a new pool with my 8 TB drives. Then when you get the next 16TB drive, swap out the other parity drive. Also if I stop the array, I can't unassign that drive from parity and then assign as disk drive because unraid doesn't This statement is only true if both drives are the same speed. A zero value will not impact parity. UnRaid supports a maximum of 30 drives (28 x data + 2 x parity) in its main array. Test 2. 5in 5900rpm 4TB parity drive to the array. or - Stay way of that !! Apr 9, 2020 · I thought Unraid would have something built-in to copy the parity bits from the smaller drive to the larger drive. I can't add any more because I maxxed out the 30 drive limit. Support for two unique parity drives has been mentioned as something that may come in a future version. Dual failures will happen especially during a rebuild from a single failure. The drive that needs replacing is listed as Parity 2 in the dashboard. In most RAID cases, when you write a file to a RAID array, more than one disk will spin up, and data is striped across several drives. And then the next data drive and so on. UnRAID can handle up to a 2 disk failure without data loss, assuming you have two parity drives. These 8 TB drives will not be protected, but I can create shares and assign the shares to these drives using the "cache-only" option. Not having a parity, in some situations, will actually improve the performance as well so there's benefits to it. Please ask for further advice if any of this is unclear, and we can get more specific. Apr 21, 2015 · I've got two UnRAID servers (main server and off-site backup), both of which have 6 x 3TB WD Reds in their arrays not including cache (I also have 2 x 3TB Hitachi Desktar 7k3000s laying around as cold spares). With 2 parity drives, you are protected against two drive failures simultaneously. Still I find dual parity pretty worthless for the array sizes in unraid. The only requirement is one/both of the parity drives MUST be equal in size, or larger, than each individual data drive in the array. If parity copy is not possible, then Unraid could do both Parity 1 and Parity 2. ago. In looking online it doesn't look like WD makes a black caviar 1. Feb 7, 2017 · 1. I've just added more disks to my system. I also added a Supermicro AOC-SASLP-MV8. If you need more cache capacity use RAID 0, if you don't care about your dockers, VMs, and everything else. I've even booted unraid into safe mode, and issue a spin down, but they both will spin right back up. I've successfully completed a parity check. Obviously you would want at least the 10TB, and Feb 15, 2017 · 1) swap existing parity with new 8TB drive, run parity rebuild. You also wouldn't get any performance boosts since unraid isn't traditional raid. I swapped system board, added a new hard drive, and swapped one of two of my cache drives. 5. After pre-c;learing the replacement, can I just stop the array, shutdown, pull the drive to be Apr 2, 2024 · The Unraid Clear is functionally equivalent to the write phase of a pre-clear and takes about the same time as that would take, but is not as thorough a test of the drive. Your array might be unprotected during this transition. You buy a 4TB drive as a replacement. This would allow two drives to fail without data loss. Its purpose is to provide access to your data in the event of a failed drive. May 19, 2017 · Bigger parity drives are only needed when you have data drives that are bigger then your parity drive (because thrn parity does not work!!) There is not any sense in having bigger parity drives then your biggest data drive (and since all tour data drives are 2tb the parity drives need to be 2tb to, making them bigger is possibly but it has no advantage whatsoever, everything above 2tb simply Nov 20, 2020 · Wenn ich jetzt eine zweite Parity einbauen möchte, wie zählt da die Größe? z. Ran preclear twice on both 5 TB drives. 3 18tb, in a normal setup (1 parity) is 36tb data. May 20, 2023 · 1. B 2 HD x 3TB = 6 TB als größte Platte (Parity) Kann man dann größer als 3TB bis max. can i plug them into another pc to pull the data, can it be done in windows or does it need to be on a linux machine or can unraid do that? Edited October 1, 2023 by fespinoza831 Jun 16, 2021 · Note that with just one data drive having parity (once it's synced) won't degrade performance, since it works like raid1, with more than one data drive you can enable turbo write, without controller bottlenecks it will write as fast as the slowest array disk can read/write, at the expense of all disks spinning up for writes. I'm a noob with servers and unraid. Assuming your parity is equal to or greater than the size of your drive. May 19, 2018 · So what does having a third parity drive on 1 of your two identical arrays get you? All it's adding as greater potential uptime in the rare case that you would lose 3 drives before a successful data rebuild. assign the (unassigned) parity drive to a data drive slot. If the new parity drive is slower, that WILL slow things down as the speed is determined by the slowest drive at any point in the check. So with one 500gb, one 1tb and one 1,5tb RiffSphere. 2 TB to the 4TB drives. black said: Yes, with only 2 drives Unraid uses them like a mirror automatically, same with 2 parity drives and a single data drive, it will work as a three way mirror. The process of building parity will immediately begin. 2 on to the 4TB drives and then replacing the 1. General Support. i do 6x 4tb drives and 1x 4tb parity disk. 2s with the 4TB then letting the parity rebuild each time. THANKS!!! 1 parity drive will cover up to 30 data drives, and will protect against any 1 drive failing. One is none. Apr 26, 2017 · I've set up the shares and a few docker containers along the way. See how and why Unraid uses parity in a different way to regular raid. Do you have backups of the data on your array? Apr 8, 2021 · Bug Reports. Do note: In that setup (HDD Parity, SSD Array Disks), writes will be slowed down to the speed you can Feb 16, 2018 · Just remove the old parity drive and add the new one, and start the array. Haven’t noticed a significant difference on a core i5. Either way you're hinging data safety on active drives not going down and that's a losing proposition given how drive failures work. I have a system that is mostly 3 TB drives, but has some 2 TB drives in there. Once the new drive is full of zeros, Unraid can silently slip it into the array without needing to Jan 1, 2017 · 2. I’ve run one and two drive parity. One will be used as a data drive and the other as the parity drive since the current parity drive is only 4 TB. Reply. Additionally read/write performance in the case of RAID. Tldr, if you can afford to lose more than one drive, go 1 parity, if you're paranoid or don't want to lose data, go 2 Parity. Go with what is right for you. HDD for parity. 85: Spinning down device /dev/sdf Apr 8 10:18:58 Tower emhttpd Jun 20, 2023 · Well im in the process of swapping out each of the low numbered drive from the 1. 5in drive (my current parity). 5tb and 2x1tb data drives… Nov 29, 2023 · Unless you have a very old CPU then doing 2 parity drives at the same time can run at a similar speed to doing a single one. There are no drives bigger than 4TB in the array. Same as what RAID6 offers. What are the pros and Oct 17, 2018 · Yes, with only 2 drives Unraid uses them like a mirror automatically, same with 2 parity drives and a single data drive, it will work as a three way mirror. Samsung SSD as Parity. Copy Disk5 data (which is my Parity2 drive data) to the new 18TB drive (in my Parity2 slot). The two parity drives in unRAID use different algorithms. I would suggest that with 11 drives, and if you have not backup, dual parity would be prudent. An all SSD array would be fine but you can't use parity because TRIM would break the parity. 8k. So I am slowy moving the data off of a 1. This video shows how parity works and how it protects your data. Assuming you want to keep the data from the drives you are replacing, you must rebuild them onto the replacements. Disk5 remains a drive with parity data. select Utils->New Config. 1 parity drive = lose any single drive in the array and you're still going. I'm looking to upgrade the parity drives this summer to gain another 3TB in storage spa Jul 24, 2023 · Unraid has earned a reputation for its exceptional storage management capabilities and extensive support for popular media server applications like Plex, Emby, Jellyfin, and more. This can result in, for example, 2 500G drives being of slightly Dec 24, 2015 · I just purchased two 5 TB Toshiba drives for my server. 0 GHz or better; At least 2GB of RAM, but some of you have 20+ core beasts with tens of gigs of ram, so I'm a bit confused. However, with the recent addition of ZFS in Unraid 6. There is no way to accurately predict how and when a drive will fail 100% of the time, many times there are warning signs, and Unraid will try its best Nov 22, 2021 · I made a terrible mistake, still unsure how I did it. Jul 12, 2017 · Currently have a 6TB parity drive and needing to upgrade to an 8TB parity drive for the new data drives I am adding to my array. Best. You would basically have to clone one disk onto the other with dd or something, while keeping both still in the array so parity would be updated as the contents of one of the disks got changed. Quote. and 2 Cache drives. Aug 18, 2016 · - Buy 2 of that Seagate 4TB 2. With single parity, you can only rebuild one at a time. There are several new drives (5TB Seagate and 2 3TB Hitachi) which are filling with data in a nearly equal way So the major advantage of say the parity method in unRAID vs say traditional RAID5/6 is that in an array failure, you don't actually lose all of your data across -all- of the drives. Know that when you add a new drive in the future you cannot use a drive larger then your parity drive. May 13, 2021 · The Unraid minimal specs state: A 64-bit capable processor, 1. Apr 8 10:18:45 Tower emhttpd: spinning down /dev/sdf Apr 8 10:18:58 Tower SAS Assist v0. 2] Parity Drive will not spin down via GUI or Schedule. I also have 2 m. 1. 2. 2) add new parity2 drive and run parity rebuild. You can buy 8tb drives, just use however many of the 10tb drives as the new parity drive (s) as they are your current biggest. I’m looking at grabbing 1 or possibly 2 x 16TB drives, 1 for parity and maybe 1 for data, then possibly moving the drives from the Drobo to unRAID since I can’t figure out how to attach it directly to Mar 21, 2018 · I have only one parity drive and two drives have failed at the same time, i know bum luck ! Question is there anyway to start the array without the two drives (i do know that i will have data loss) but most of my data should still be there. So maybe you could even add in the new parity, get it caught up. And the premium is a slot on your server and your biggest disk, which depending on how you buy disks (I have disks from 4TB to 18TB) could Oct 16, 2008 · Here is a description of how parity works in unRAID. The array will still be protected because I have 2 parity drives. Not 2. start the array. I also have a DroboPro with 5 x 2TB drives, that is hooked up to an almost-always on windows PC, shared and set up as an SMB share in unRAID. I understand how the first parity drive functions. In my system I have 1 4tb parity, then 4x 4tb, 2x3tb 1x1. 2c) You could do like I do and have 1 or 2 additional Unraid clone machines that rsync from A to B and A to C. All SSD Array. 5in 5400rpm and add it as a 2nd Parity to my current 4TB 5900rpm 3. It is not necessary for it to be bigger than the largest single data drive, but it can be. If the bit values are 1,0,0,0 the parity will be 1 (1+0+0+0+1=even). Two things I really like about UnRAID is the ability to add new drives and if a drive fails Dec 1, 2021 · Just for my clarification regarding the role of parity and the parity check: 1. Jan 10, 2024 · I have an identical, pre-cleared drive as a backup, so I followed the steps to replace the existing parity drive found on the wiki (and on these forums): (1) stop the array; (2) unassign the parity drive; (3) shutdown the server; (4) remove the old parity drive and replace with the new parity drive; (5) boot up the server; (6) assign the parity Mar 12, 2016 · Posted March 12, 2016. I have complete 1:1 redundancy with zfs mirrored stripes. Or you can reuse a disk in a new slot. Now I'm getting "Parity Device is Disabled". The data drives range from 2TB to 4TB. Everyone has their own comfort level - two, one or no parity drive. Start array, format 2tb, and then select new config. 3. Apr 2, 2019 · I'm currently running unRAID with 3x 8TB WD Red drives (1 parity) and a single 2TB WD Purple drive which is used for my BlueIris security cam feeds. For me, it comes down to how many drives you have in your array. All disks are functioning normally (no errors). Then when you get the third 16TB drive, swap out a data drive. 5TB and the 2TB verision is very expensive. ClintE1956 • 9 hr. The parity drive needs to be at least as large as your largest data drive. (B is located 800 miles away). Backups are meant to restore data lost to failure. And rebuild parity. Jul 2, 2011 · parity drive MUST be as big, or bigger than the largest single data drive assigned to your array. May 6, 2021 · 1. There is 5 Drives in Array and 1 in Parity. Feb 7, 2020 · In this How to Unraid video, we will be going over how to properly preform the unraid parity drive swap procedure. Just remember that in your unraid array, all the disks will be limited to the smallest parity drive when it comes to available space (ie: if you have a 6TB and 8 TB parity drive, and a 2TB, 4TB and 10TB regular drive, the 10TB drive and 8TB parity drive will be maxed to 6TB, while the other disks all have their full space available for use). Copy all files from the smaller drives to the larger drive. Any recommendations would be greatly appreciated! Thanks, May 8, 2017 · Using a Pro license the 30 drive limit includes parity but does not include cache. It's a 5TB. Dual parity is an insurance against a very specific failure, exactly 2 disks (no more, no less) failing within a 2-3 day period. once cleared, shut down array, add drive to the array (if thats what i need to do), start array Can repeat steps 1-7 if you have dual parity and are upgrading both. If it were, you would not obtain true "2 drives can fail" status. To do this, go to the Main tab and select the "Devices" option. Start array to rebuild Disk5 actual drive data based on the 2 parity drives (10TB and 18TB). Question, should I unplug my old parity drive and then plug in my new parity drive and select it in configuration to rebuild, or should I be able to just stop the array Jan 30, 2016 · Posted January 30, 2016. Let's examine three potential storage Sep 29, 2023 · Parity sync is finally running with no errors and should be done in about 15 hours which is normal for me. I started my first UnRAID build with 3 Data + 1 Parity. I then rebuild my system with 3 Data + 2 Parity plus have B2 backups on valuable stuff. Then when Parity 2 is complete, remove Parity 1 and move drive to data; Parity 2 drive now becomes the Parity 1 drive. Prices are highly location specific, so I'll give a hypothetical you can apply to your situation. I have 2 parity drives plus 4 data drives in my array. Random thought: I think unraid now allows you to add multiple parity drives (if you have the paid version). Once you have the 8TB parity you can add 4 TB drives to the mix. This procedure is used to take a parity dr Apr 9, 2020 · Once that is complete, download a new flash drive backup, and DELETE any previous backups. On 4/1/2024 at 9:38 PM, bmartino1 said: Sep 27, 2013 · This is actually a special degenerate case of XOR parity. [6. 2 drives for cache and apps. What way should i proceed please? Which order etc. After all, the array is a storage pool. Thanks mucho for your patience and any thoughts. Jun 30, 2013 · Posted July 1, 2013. It’s unlikely 2 drives will fail at the same time. 2 I cannot spin down parity via GUI, as soon as I spin down it comes back up. Normally with pre-clear one tends to run some read phases as well to check the disk better which is why pre-clear typically takes longer. I then removed the 2TB drive from the unraid parity and then swapped out one of the 1TB hdd in the data disk with the 4TB hdd. •. With no parity and no backups you're hoping a drive doesn't fail. (If something goes wrong, you still have the old parity drive that you can put back!) I should: 1 - bring down the system 2 - swap 5TB parity drive for a new 6TB drive 3 - preclear the new 6tb drive The size of the parity drive (s) is the ceiling for how much space the data drives can use. Then remove the old from the array and reformat/reassign it as data. No cache drives. RAID-5 only has one parity block, so it can only handle 1 disk Apr 13, 2022 · 1. Danke und Grüße. unRAID has a hard limit of two parity drives, you cannot add anymore than two. Here is what I have done so far: 1. or - Buy 1 of that Seagate 4TB 2. Maybe 10tb as parity 2, wait for parity to build to to new 10tb then replace faulty 3tb data drive with new 10tb data drive? thanks. @johnnie. IMO, single parity is perfectly reasonable. unassign the parity drive. 3 hard drives as data drives. Parity 1 is a 4TB. I suggest adding the parity-drive first, because: (1) Parity-Calculation could be just a little bit faster, if it‘s reading from less data-drives; (2) The Parity won‘t change by adding data-drives, as unRaid just cleares those (writing all 0); (3) You would have parity as safety against drive failures sooner; Or you can swap out one of the existing parity drives with the new 16TB. . For example, if the smaller drives are Disk 1 and Disk 2, and the larger drive is Disk 3, then you could use these commands in console or telnet: Apr 29, 2023 · The server is still rebuilding the parity so not much new I can post as to that, and the drives come in Monday so will give an update as soon as I can. Oct 17, 2018 · Posted October 17, 2018 (edited) On 10/17/2018 at 6:43 AM, johnnie. If you fear to lose data on the cache, add a cache drive and use RAID 1. in unRAID you can set either 1 or 2 parity drives. Jan 7, 2019 · Hello All, I have a 4TB parity drive I want to replace with a 10TB drive and 1 failed 3tb data drive i want to replace with another 10TB data drive. I precleared both drives and put on in to replace the 1 TB parity drive. Given that none of the other drivers attached to the LSI-2008 are having issues, I think this narrows it down to one of two possibilities: 1) Power issue to the parity drives 2) Specific damage to the specific SATA break out cables attached to the parity drives. Jun 17, 2016 · Unraid OS 6 Support. When there are only 2 drives, 1 data and 1 parity, and the parity and the data drives are equal in size, the parity will be an exact bit for bit duplicate of the data drive, files/directories in all. I'm now comfortable with the set up that I would like to add the real drives that I will be using on the new server. I have a moderately sized Unraid server that I started with 4 14TB drives, 1 parity and 3 for the data array. A single parity disk will protect any one disk failure, even if you only have one drive. Performed a parity check on the existing array. 2 parity drives will also cover up to a max of 30 data drives but will protect against any 2 drives failing. 1. 9. There's no ratio of drives to parity. But your math is wrong. 3) add old parity drive as data drive and (you guessed it) run parity rebuild On my system, it takes 25 hours to run an 8TB parity check/rebuild, so it is a 3+ day operation. Drive failures only jeopardize the data on those drives, not the entire array. So they can be the same or bigger. Each time you add more storage you, potentially risk loosing more data. Unraid Keeps Your Data Safe. Jan 7, 2019 · BTW, if you add your old parity drive as a data drive as well as the 10TB, you should have enough free space on the array to copy all your data to the newly formatted XFS drives. Click on the "Unassign" button next to the failed parity drive, then select the replacement drive from the list of available Feb 15, 2024 · Unraid is quite happy to run with parity2 present and no parity1. Add a Comment. You can also have up to 24 drives in the cache pool. Also be aware that different models of drives of the "same size" might have small Apr 25, 2018 · I do understand that 2 identical disks would cancel each other out in parity, it is getting them identical that is the problem. Your parity drive needs to be at least as big as the largest data disk. 3TB Datenplatte. stop the array. 5in 5400rpm and use them as dual parity drive, then repurpose the current 3. This approach makes parity redundant to the clone. I've purchased 2 x 18TB drives and I've already replaced the 1TB parity drive with one of the 18TB drives. I bought 2 4TB HDD and want to add them to the unraid. However,replacing a failed drive puts stress on the system as all drives are read, so if another is going to go, it’s more likely to go at that time. . Add up corresponding bits and determine if odd or even. With dual parity, you could rebuild 2 at a time. Maximum fault tolerance with the main Unraid array is 2 drives. thank you!! Parity is a protection against inconvenience only. From my understanding, it is not a simple copy of the 1st parity drive. TL;DR it's just a matter of preference. Jun 19, 2012 · They were referring to using two drives in either RAID 1 or 0. 6TB als Datenplatten hinzufügen? Oder zählt jede einzelne Parity Platte, also wie bisher auch max. As you grow your array, the odds of multiple drive failures before the array is healthy again increase. ----- Example of one parity drive: Assign the replacement drive: After you have installed the replacement drive, you need to assign it as the new parity drive in the UnRAID web interface. My 8TB drives are not very busy at all but since i'm constantly writing to the WD Purple disk, the parity drive is also constantly writing to disk. If you have godlike internet, only use it to store media, and don't really care about re downloading then roll the dice. While array is not started. I attempted to access using "Ctrl+M" however it did not work. I've got an unraid system with 11 drives plus 1 parity drive. I only used the 5TB originally because I had it laying around. went ahead and added a more recent diag just in case, but nothing much has happened since the parity rebuild started. Omreport reports that both drives are exactly the same size as shown in the pictures below: Assign new larger drive to new slot, unassign parity drive, and start array. Weird thing is I do not see the option to access it's BIOS at boot up. I would consider 2x parity after getting to about 8 disks. 5TB or even a 2TB drive for parity and then migrate my existing parity into the rotation after rebuilding and checking parity. 18 3tb, in the least insecure setup (2 parity) is 48tb data. Jun 7, 2021 · Suppose my array of 3 and 4 TB drives fill up the 30 drive array limits. put new drive in place of old parity boot server select new drive as parity and start array let unraid rebuild parity once done, pre-clear old parity drive. The replacement will be a 4TB. 4. Then after you are satisfied that all data has been copied, you can either remove all the old drives and keep them as backup, or leave them in the array and format Nov 1, 2020 · The problem is that when I try to move parity drive (1 or 2) to the data pool it says the biggest drive is not a parity drive. That is sadly out of date, I recommend 4GB bare minimum, 8GB is more comfortable for the future. Now you can do as you wish with the removed 1TB drive. There have been rumours of allowing 3 but no confirmation or ETA for this. If your flash dies and you accidentally use an old backup that had those data drives in the parity slots, Unraid will assume it needs to rebuild parity on those drives, permanently wiping any data you have on them. 5) Start array. So no, SSD parity would be a waste if using HDD array, and would break parity if parity is used. 3) Stop array (if auto started) 4) Assign new 8TB drive to parity slot 1. Offsite backups of important data to another server running no parity, 4 data. If you XOR anything with itself, the answer is 0. You don't mention how many drives you have in your array, but with two parity drives you are well protected. You can stop the array; unassign the parity1 drive; assign it to be disk2; and start the array. Posted February 7, 2017. qu jg mn pm nz lx kk iq ro ff