Unraid how many drives Have seen some people use 3 disks keeping VMs on another drive entirely for performance. Question on disk limit for Unraid Basic. I want to make Plex run faster at the least. The cache uses a variant of RAID-1 when there is multiple drives so with multiple drives the available space is determined by the smallest amount that than Pro all devices attached to the PC count against the license limits regardless of whether they are being used by unRAID. will be running on the newer machine, what cache pool setups will be best to optimize the UNRAID media library server? How many disk can fail at a time? All your disk can fail in a single instance. Best option for more than 30 drives is to move to a second server, or use an OS designed for large arrays. The plan would be to build the UnRAID server with that 10 TB drive as the only drive, then add more drives and use the 10 TB as the parity. It's not about the size of the data drives. I currently have 2 older SSDs that one is a cache drive that my appdata folder sits on as well as my Downloads folder. 1 hour I have seen people use multiple cache drives and even the unassigned device plugin to segment and tweak usage. Unless you wanna start tossing drives into Pools ( that aren't protected by parity drives, unless you want to put them into like btrfs and use like software raid5 or something like that ) then Im not sure there is a Would four additional drives work with a molex cable (~80W)? Or eight additional drives with two molex cables (~160W). Theme . In this blog, we'll go through and answer some of the most asked support and forum questions received about Unraid. Hi Guys, as in the title, this is my first multi-drive failure with UNRAID. Does unraid check on system boot up how many drives total you have include unassigned? Share Add a Comment. Can the UnRaid OS support such a Cache Disk (dockers and data transfer) but I'm running a single cache pool with multiple drives in it. I'm currently transferring data from my old Drobo onto my newly built unraid rig. But unlike mirroring, which is what RAID1 does, a parity disk can protect the data on multiple drives. /me knocks on wood. Members; 1. - consolidating shares that have been spread across multiple disks. Without buying some 10TB drives, I would not have been able to even fit all my data in one unRAID to begin with, after having so many drives die on me over the years, I just feel kinda good about WD Reds, at least for now. System on, all disks spinning: 180 watts At the moment I am running with one additional large fan at the back of my coolermaster. Check out the FAQ at http://lime-technology. Contrary to what I would have expected from waking up to multiple dead drives I'm actually somewhat excited to learn the process of recovering from a situation like this. php?title=FAQ. Which is correct? I see this in the manual, "NOTE: The attached device limits do To assign devices tothe array and/or cache, first login to the server's webGui. Unraid is not like traditional raid as the data is not striped. I remember reading about a bug when you use raid 1 between uneven drive sizes. For example, you may have a share for your photo library, another for movies, and yet another for important documents, This is one good reason to have dual parity (in traditional raid, but this is not utilised in Unraid as of this comment) as it gives a second opinion about whether that missing drives number should be a 1 or a 0 and you can also recover from two drive losses by combining the parity of both drives (which use different algorithms). If you don't care about an array then there's no I run 3x raid z2 of 8 drives so 6 parity drives. The bug is that unraid doesn’t display this correctly. Added it to parity and ran a test sync (went slow so I gave up on that plan for Formula of Unraid Calculator. If you have 1 parity disk, and four storage disks, each 16TB in size, Unraid implements ZFS pools/multiple partiy pools or removes/allows users to exeed 30 drive arrays. Currently, I have 4 brand new 4Tb HDD in my array with 2 data disks and 2 parity disks, with a 1Tb Samsung Evo 970 plus Drives are cheap, your data isn't. The server will contain 6 total drives, 12TB 7200rpm as the Parity drive, and 5x 8TB 7200rpm drives. 9, we have included support for Multiple Pools, granting you even further control around how you arrange storage devices in your server. 3, you can have multiple pools in the 6. Posted August 24, 2015. Personally I would NEVER use ZFS on single disks on my Unraid array. These totals would stay way below the 500W of the PSU and are nearly the half of the 500W. 2 -SSD Cache Drives. Stay informed about all things Unraid by signing up for our monthly newsletter. Quote; ConnerVT ’d probably have to go for the external version due to lack of space and cooling in the server case. unRAID's wiki page on How Parity Works explains the details. Unraid requires all remaining drives to be read perfectly to recreate failed drives, so having old sketchy drives is a bad idea. If a drive goes bad while I'm traveling for a few days, the system can continue running until I can get back and take care of the drive, or I have time to order another drive if I don't have a spare on hand. XFS gets all the testing, gets all the love. Unraid needs direct hardware access to the drives to work properly, hardware raid cards mostly emulate those functions, but you can't guarantee everything unraid tries to do directly on the drive will work 100% as unraid expects. But I just had 1 Parity, 8 Storage, 2 cache SSd's in RAID 0 and 2 External drives through Unassigned Devices plugged in and Preclearing at the same time and didn't have a problem. Hi, would someone be able to clarify what is the limit on the number of drives in an array? I see the Pro license says Unlimited, but reading some of the forum posts, I also see a 30 drive limits. Always pick the largest storage device available to act as yourparity device(s). As was mentioned the 6. So what's the max dri A single parity drive can protect any number of data drives, up to the 28 drive limit of a Pro license (mind you, I'd have added the 2nd parity drive long before then ). Assigning devices to Unraid is easy! Justremember these guidelines: 1. That is, if ANY one data drive dies, the data from that drive can be reconstructed from the parity drive. Keep the drives cool with a fan. Any speed or type or size is fine to start. 5k 19 Posted May 30, 2020. So even if you lose data disks beyond how many parity drives you have, you only lose the data on those data disks you've lost. Unraid Starter allows for up to 6 attached storage devices 1. New - DARK - Invision (Default) New - LIGHT - Invision . 13 release is meant to make the current Unraid main array just another pool type thus removing any realistic limitations on number of drives even for that type of array as you can then have multiple pools of that type. What hardware can we use with Unraid? That will pretty much depend on what you are going to use the Unraid server for. To be honest having only 2 parity drives protecting 28 For the Basic / Free version of unRAID, you can have up to 3 drives (2 data drives & 1 parity drive). I always use 2 parity drives (currently have 6 drives in my system, 2 parity, 4 data). My current configuration is. You really want something that can fix at least 2 x 3. VM drives for the "Basic" and "Plus" licenses: I will leave for others to clarify. A 10TB rebuild for example only takes me about 17hrs. Should I try - at least the four additional drives? Thanks again. tjb_altf4. Members; 14 Author; Parity drive(s) must always be at least as large as the largest data drive. Start new topic; Recommended Posts. Copy all files from the other smaller drive(s) to the larger drive. Pre-cleared it. When I was running standard unraid array I had one parity drive and 23 data drives. Buy a ups and set the device to auto shutdown during power failure. Just to add to this post, i have been using (unraid) x7 4tb drives and x1 6tb (parity) for a total of 8 drives with same molex power cable with the Corsair CX430M w/o any issues. A second without it is a second when you are at risk for data loss if a drive fails. So as far as unraid is concerned it is only represented as 3 disks, one parity and two for the array. 5" drives. I just upgraded my UnRaid server Motherboard to a Gigabyte Z690 AERO D. So what does this new functionality offer? Separate Storage for Caching, VMs, and Containers. Im using a mac and Im trying to get my head around it Assign new larger drive to replace missing smaller drive, and start the array, to let Unraid rebuild onto it. For example, if a smaller drive is Disk 2 and the larger drive is Disk 3, then you This would give you 10TB of protected storage => i. For unRAID and lots of HDDs, it is better to have a PSU with a single 12v rail that supports the combined power draw of all the drives, CPU and GPUs on startup . I only purchase used eBay drives from Unix surplus generally While it’s unfortunate you’d burn two of the 18TB drives for parity, I absolutely feel that two parity drives is the way to go. I have bought an unraid licence, as an impulse buy, almost 2 years ago and haven't used it until now for mostly a single reason - the drive limit was too low. Some people prefer to scatter stuff evenly across all their drives, so if they lose a couple drives only a portion of any particular share is gone. I saw an 88 drive hotswap case on ebay Before expanding my array further I am waiting the next major unraid release where multiple pool/array will finally be a reality. Allowing to use 1 or 2 drives as parity that can rebuild the data of a failed drive onto a replacement drive. 1 Quote; ziggie216. Not the most elegant solution, but it works! I have a 48 bay netapp (2 daisy chained 24 bay units) and am considering unraid to manage the drives. I understand, for example, that for a 8TB server size, there are several different combinations of drive sizes vs drive number but, I I am building an unraid server right now and I am trying to figure out how to setup my Cache Pools. Parity drives can be larger than all the data drives if you wish to leave room for data drive growth. I'm using the Rosewill RSV-L4412 - 4U so x2 4pin molex feed 4HD and a fan and i've been adding drives w/o opening the case till now that i bought another 4tb drive and didn't have a way to Hi I've read the wiki but there's no mention of how many drives you can have alongside a single parity drive. Click onthe Maintab and select the devices to assign to slots for parity,data, and cache disks. With a single pool, the same underlying storage for your VMs and containers is being used to Molex (4-pin peripheral provides power to the cages where each drive plugs into a SATA power connector in the cages. Posted November 28, 2021. This is true but I personally (at least for my use case) find 2 parity drives to be too much. I can see the 9 drive plus version an the 15 drive pro version but no mention of how many disks are supported by the free one at all. hi, I'm looking to build a test system using the free version of unRAID but I can't find anything written about how many drives are supported by it. Dual parity will let you recover 2 data disks but only if all other disks are present. So total number of data disks is 28. If you are going to use it as a NAS server, then the requirements are minimum. My primary concern is speed of the server as a whole when doing file transfers. Hi All, I have been using Unraid since Dec22 and loving it so far! My current setup has 2x 8TB Seagate IronWolf drives, with one in the array and one as a parity drive (I am also using a nvme drive for appdata/domains/system). 8. Subscribe. Not really a fan using only 2 parity drive for 28 data drive, particularly if you consider the rebuild time when you use 18+TB hard drive. It also depends on how many amps your 12v rail supports. With modern drives this is 600 TB in a single server and will be 900 TB in a couple years. Due to UnRAID's use of a parity drive to assure data redundancy, the size of this parity drive must correspond with your tiniest data drive. For clarity, here's an illustrative instance: Suppose you have these hard drives in your UnRAID UnRAID can survive as many storage drive failures as there are parity discs without losing any data. Usable Storage = (Smallest Drive Size) * (Number of Drives - 1) In this formula: Smallest Drive Size: The size of the minutest hard drive in your UnRAID array. key file) to a different Hi everyone, Total Noob here. I've been looking at the documentation and forum to see what the recommendations for flash drives are these days. 3 - average 50-60 MB/s, peak reported 101 MB/s* So generally speaking, a server with a cache drive has write speeds 2-3x faster than the same server without a Many people with unRAID arrays become somewhat anal about having parity protection. So lets say you have 3 data disks and one parity disk. You can't rebuild from parity without all the disks. Some will have a dedicated cache for those uplaod files another for their dockers/appdata. Do some analysis of so that by the time you get to the point with your current up-sized drives are starting to fail, they aren't half empty. 9 beta 25 version, I'm not sure what the drive limits are there, nobody I've seen has hit a limit. It might make sense to go with 16TB or it might make sense to with 8 or 10 TB drives. I assume you can only do 1 drive so you can't even really do redundancy so the whole use of unraid is limited to dockers and VMs. Furthermore, the parity rebuild process is much less intense. 2. Since all the RADARR, QBittorrent, Plex Media Server, etc. Administrators; 29. The primary draw of unRAID is parity without striping. Although, I know that for a normal RAID5 system, you need 3 drives to get started. com/wiki/index. Once btrfs caching is enabled (originally planned for v5. Is there a table that shows server size and the number and size of drives required to equal that server size. The data is continuously available through the rebuild process I have 10 hard drives that are 4TB and 3TB that need to be precleared and the same on an exact copy of my server belonging to a friend, How many hard drives can I preclear in one go and is there a limit using the unRAID free, 3 drive version. I noticed that on the 5 drive version of the external dock there are five SATA data connectors - 1 per drive - but only 3 SATA power connectors. I have an array of 26+2 and 3 drives have spat the : All of the contents of the old drive will be copied onto the new drive, making it an exact replacement, except possibly with more capacity than the old drive. Use the two SSDs for cache or a raid1 pool for something you need to Number of Drives: This number encompasses the entirety of data drives in your UnRAID array, the parity drive included. The cache pool(s) are normal BTRFS RAID volumes, you can have 1 with up to 24 drives in the release version 6. You can add as many shares as you like to your Unraid server. Parity is calculated in real-time over the raw disks and stored on dedicated parity disks. System on, all disks spun down: 101 watts. I would make my main array use the first 30 drives. 28+2=30. If you are running v5 or v6 of Unraid, then go back to the previous section. Posted May 30, 2020. I’m assuming that 3 SATA power connectors are enough to power 5 drives so the enclosure combines the 3 power inputs and It depends on how many disks you want to end up with. Then I do a preclear with the -n option if it's a drive I'm adding to UnRAID [skips the pre- and post- reads, so it's MUCH quicker than a full cycle]. It may seem impossible how one parity drive can protect multiple data drives. I'm adding 2 4TB drives to make my confiuguartion 2 - Parity : ) 8 - Useable 2 - If you have a lot more data disks then I would say you should have dual parity, but single parity is probably OK for as many disks as you are thinking about, Adding a data drive to Unraid is easy, removal is more complicated. This is useful when you have added or removed multiple drives and wish to rebuild parity based on the new configuration. The parity array is the Unraid "special sauce" and currently you can only have one of those, limited to 2 parity and 28 data. Parity by itself can recover nothing. This will perform much better than the main array albeit without as much flexibility in terms of adding new disks as you go. As an example I have 3 raid10 groups with maxcache enabled, each raid group is 8 disks however it appears as a single drive in unraid. With the release of Unraid 6. Posted July 29, 2022. I am about to get my hands on QTY 3 of 2 TB Samsung NVME drives. Single parity will let you recover a single data disk but only if all the other disks are present. This parity bit works across the set of bits in the same relative bit position on each drive. At one time, I had an 8TB parity drive in my system while all the data drives were 3-4 TB in size. Without a cache drive: Unraid 4. *4 enterprise SAS w/ internal battery backup (high write cache) *6 enterprise SATA w/ internal battery backup (high read cache) *10 SAS 3TB drives (caches everything that isn’t cached by SSD) *4 SAS 6TB w/ 2 SSD ZFS storage for (VM backup as well as some other shares The UNRAID server will have 5 x 14 TB drives, one will be used for parity. I test my drives using WD's Data Lifeguard, doing two complete quick & extended tests; with a full write zeroes in-between. You're really, really limited there. W The limit is the number of drives physically attached to the server running Unraid - not the max in the main Unraid array. Do you need to add additional storage in your UNRAID server (NAS) or maybe you're just looking to add some extra drives to future proof the amount of storage. SH4D0WFR0G6996. The remaining 18 drives w It also has Parity protection. Quote; Squid. . 3. MadsRC. Physically added a 3TB drive to my current 20 drive (not including parity) server. The parity drive doesn't need to get bigger as you add more drives - it just needs to The list below is a possible outcome of my UnRaid hard drive inventory: Three 10TB hard drives One 12TB hard drive One 5TB hard drive Two 8TB hard drives Two 16TB Parity Backup hard drives I plan to buy sometime in 2020 when prices come down. I've had my unraid server going for a total of about 8 hours now. And it is many times cheaper than building multiple machines + buying multiple unraid Pro licences to run 30 drives at time. The practical use cases for this are Non-existent. The only thing I can think of is the 2 Cache SSD's being in RAID 0 are being counted at 1 drive. unra The system allows you to enter up to 21 drive capacities (based on the "fake" capacity shown by your drive manufacturer on the label - eg. The procedure for Unraid v4 : This section is only for old versions of Unraid, such as v4. 5. 0, but will now be in a future release -- probably relatively soon), the Pro version will support 25 storage devices, which may be assigned as you like => so you could have 25 data drives; 24 data drives with a parity would be nice for those with well into the large number of drives like 20-24 data disks where their potential to lose 2 or 3 at once increases dramatically that unRAID allows for more than two parity disks. or I can afford to kit out a 24-bay full of 8TB drives then I'll migrate to Wouldn't it be way cheaper to replace all of those with 3 18TB drives and have a much smaller system that uses much less power and doesn't have a ticking time bomb with that many 10+ year old drives? Are they all USB drives or did you setup a 12U rack server? In Unraid, the parity bits are stored on a parity drive independent of the data drives. One way of thinking of unRAID is kind of like a JBOD with a parity disk (or two). System on, all disks spinning: 202 watts After (single Seasonic power supply) System on, all disks spun down: 68 watts. To install the license key manually, first save the key file (. (Will How many drives? How many drives? By MadsRC July 4, 2012 in Storage Devices and Controllers. e. ang3l12 Posted August 17, 2017 So I thought removing the 3TB i wanted to use for parity would work as a data drive (it didn't) So here is the process I went through before this occurred: 1. Without it not much is left (just compression in Unraid) for worse support (aka less people run Unraid that way so you will have less support). Posted July 4, 2012. 1-Parity 7-Useable Drives. SIO mentioned that it was way less wear on the whole array to pull I could use unBalance to move ALL the Movie and TV shares onto each of those new disks and not wait for unRAID to rebuild them. 5" HDDs really suck. First, ensure you have a recent backup of your USB drive via Main → Flash → Flash Backup. personally it should be any amount the user wants. Don't push the drives accross the parking lot in a shopping cart. I have 1 8TB parity, 3x 8TB, 1x 4TB, 1x 3TB, 1x 2TB data disks, some are new some are old second hand disks and have done a parity swap and upgraded 4 disks over the course of 2 Really its 28 drives with 2 parity. Open comment sort Quite honored my server was reposted without asking, but thought I'd give y'all an update on my upgraded 90TB Unraid Server I have: *12 various sized SATA/SAS drives in my unraid array including a 14TB and 10TB “parity” drive. I know it's set to 6 but is that system limited or array limited? Mean could I have 6 disk in my array and 1 set to Unassigned Devices plugin for a total of 7 disk in the system but only 6 to the array? The problem lies with unRAID having a 28 drive limit in the array. 7 or older. 3 - average 20-30 MB/s, peak reported 40 MB/s* With a cache drive: Unraid 4. As best as I can see, the most recent recommendations are still: USB 2, not USB 3 At least 2GB but no more than 32GB Favorite: Samsumg BAR Plus 32GB These strike me as rather dated, a As noted, the current Pro implementation 24 array drives (23 data plus parity) and one cache drive. I'm thinking about adding another 8 of these drives because I can buy them in bulk for only $50 each. I have the Plus, which gives me 12 drive limit. I believe that the 30 array drives include 2 parity disks. Quote; tjb_altf4. Squid. Just need to run power and SAS / sata cables out the back of the server, and sit the cage(s) on the top or nearby. I have been reading about how the parity disk works (https://wiki. Currently I have 4x4TB drives, with 1 of them being for parity. After Unraid starts, does it show somewhere the number of drives it counted? Edited November 27, 2021 by xrqp. Shares represent folders or drives on your Unraid server that can be accessed over a network. Might be hard to find a case, but the 5in3 units make decent externals, each storing 5 drives. Seagate 500GB 16MB Cache SATA Drive My question is, how many hard drives are needed to get started? Seems like a simple question, but I can't find an answer anywhere, only a reference to not needing a parity drive. I understand that any subsequent drives must be smaller than the parity, You can have as many drives as you wish (or your licence allows) but they cannot be bigger each than the parity drive. What it does for raid 1 display is add the total of the drives and divide by 2 As you've noted, it's a personal preference. Hard drives in Unraid servers seem to last 5 to 8 years. Still I find dual parity pretty worthless for the array sizes in unraid. So the 57th bit of the parity drive is the parity bit for the 57th bit The odds of losing 3 drives are much lower than the odds of losing two, and I think once you have more than about 6 drives total it’s worth going for double parity There's just no added benefit over 2 with how unRAID handles disks. 500 GB) and will tell you how much data storage space you'll have on your unRAID array. Lets say that all your disks are 14tb then it does not matter if you have only 1 data drive or 20, in both situations you need 1 Disk of 14TB as parity. Sort by: Best. A reminder, the Unraid forum is the single best place to start to get your Unraid related questions answered! When asking a technical question, it is best to post your server diagnostics as a part of your question. What should happen is unraid will use the common drive size (240gb) and mirrors it, wasting the excess space on the larger drive. That is the situation today, actually. Now read all the first 0/1 on the drive, lets say: Disk1 has a 1 Disk2 has a 0 Disk 3 has a 1 Most of the magic of ZFS is in ZRAID (like the bitrot protection). if any 2 drives failed you wouldn't lose any data; although if a drive DOES fail you should immediately replace it and let UnRAID rebuild your data onto it -- what dual parity does is provide another layer of protection so that if a 2nd drive was to fail during that rebuild, the rebuild would still be successful and you In my case I use Adaptec 71605Q cards, those connect up to external sas expanders with multiple JBODs. Quote; SH4D0WFR0G6996. BTW, 20W sound alot for a modern drive (Toshiba 6TB X300, WD 6TB EZFR?). And Cache Disk #2 is used as a data transfer drive to migrate files to UnRaid drives. Each disk (except parity) has its own complete filesystem, you can even be a mix of BTRFS and XFS disks. So I am running into an issue where UNRAID-PLUS is giving the "Too many drives" notification when I add 12 drives. Dual parity is an insurance against a very specific failure, exactly 2 disks (no more, no less) failing within a 2-3 day period. The trick is disks only store 1’s and 0’s. I then was planning on picking up a 1TB nvme ssd as the cache drive. 1k 322 Can I have multiple arrays (pool of drives) with unRAID? If there's a limit of the drives, the limit is for all the drives connected to the server, or cache drives and party drives don't count for the total? If I'm planning to install Plex, can I have it on a SSD? With each unraid disk having a standalone filesystem you only have to worry about drive sized chunks of backups instead of trying to manage backing up a user share that could span many drives. I see there is a 30 drive limit for the array, but that you can now use multiple drive pools with thr latest version. zrsk jrzbjc hjmpbfb dhmawnmcr vxzly dnmukp dkaxcmh newapt bst cssuc gmepig vli tcpdt eqit yrbp