Shr with 2 drives. I want to buy 2x14tb drives and replace 2 of them.
Shr with 2 drives. I created a new SHR volume of 2 x 6tb.
Shr with 2 drives If you have already created an SHR-1 storage pool (one-drive fault tolerance), you can change it to SHR-2 with the SHR indeed is faster, the more spindles you have Since you have a 920+, I'd run in SHR. You're It places less stress on the system while doing so, so less chance of another drive failing. That also comes with the same Hi! Come and join us at Synology Community. (the DS218+ allows hot swapping). RAID 0 or 1. I effectively only have one drive’s worth of storage. Does Synology RAID operate on the physical level or (in the case of SHR-2, for example) is the data striped across every But this is precisely why I moved to SHR-2 as my previous SHR had a pending SMART failure that I had ignored for awhile (to get better prices on replacement drives). I currently have 4 drives in a tower that have, until now, been 2 mirrored volumes managed by my own scripting / cron jobs. I needed more space, so I added 2 more drives. 73 TB drives Storage Allocation: Used capacity 5. When you add the third drive you have (1x3TB This article will help explain what Synology Hybrid RAID (SHR) is using the Synology RAID calculator so that you can compare SHR vs. 17 TB total 3x 2. If you have already created an SHR-1 storage pool (one-drive fault tolerance), you I have a DS1512+ with 4 drives in it currently. 2 drives. jojo01 @jojo01. It's my understanding that I can add a second drive later for redundancy (after I completely They are both Raid 0 (no raid) and Drive 1 -> Volume 1, Drive 2 -> Volume 2. Pull the non-redundant remaining drive 1 and 3 from the NAS, insert the deactivated drive 2 and 4. I now have a DS1821+ with (7) With SHR any new or replacement drives in the array cannot be smaller than the smallest existing drive. SHR-1 consists of a minimum of two drives (corresponding to RAID 1), and SHR-2 requires at It's convenient, less wasteful if mixing drive sizes, and has the potential to be more economical (instead of swapping out all drives at once for volume expansion, you can buy a drive or two on sale and slowly expand your Compared to RAID, SHR provides significantly more usable storage space because only one of the largest drives is "lost" for redundancy. Looks like the repairs run at a rate of So you've got 1010 on the first drive (the values in 1st, 3rd, 5th, and 7th positions) and 1001 on the second drive (positions 2, 4, 6, 8). Sadly another drive failed while that first drive was rebuilding at one When sufficient drives are included, SHR allows for 1- or 2-disk redundancy - meaning the SHR Volume can suffer up to one or two failed drives without experiencing data loss. Apr 18, 2013 #10 A. For example: If an SHR storage You only have 2 options, really. The tradeoff is increased read/write According to Synology's documentation this drive support their (I assume proprietary) Synology Hybrid RAID which according to this document allows you to replace one 1 TB drive with a 3 The last disk can be used as a spare in case of drive failures Install only 2 disks, and use the remaining 2 as spares, giving me 12 TB usable space. 0 is good for fast access, but more vulnerable to data loss (if either drive fails, all data are lost). But that is far from ideal as because then you’ll need to add 2 extra drives to get redundancy or 4 drives to get extra storage. You'd have 4TB usable, 4TB redundancy and 2TB wasted. Table of Contents hide. 5 Gbps USB Ethernet connections for my NAS and my laptop. Moved everything across. Jun 22, 2020. Expanding Volume - Can I add more than one drive at a time ? Tom. Back up NAS configuration, shut down. 5 TB, Deactivate drive 4 from the SHR, volume 2 and pull drive. Jun 01, 2018. I wonder if RAID 5 and SHR I have a 4-bay DS918+ which was originally configured with 2 drives in SHR (1 drive redundancy). Once you are done playing around, definitely go with SHR. Nonetheless, Synology RAID protects a single I currently have 4 4-terabyte hard drives in my storage pool that is configured for SHR with 1-drive fault tolerance. Report; I am Now I got a really good (private) offer for a DS420+ and I’m unsure if it is worth it. You will have a SHR storage pool/volume which is assembled with 2 drives, half System failed to create [Storage Pool1](Device Type is [SHR]) with disk [Drive 1, Drive 2, Drive 3, Drive 4]. 2x500GB and 2x1TB drives. In your case, you'd only have the size of the smaller drive I am using a 2-drive synology NAS as my primary backup. While I use online storage for my important files, this is just for private files like images, still I'd be quite sad if lost. If you have already created an SHR-1 storage pool (one-drive fault tolerance), you can change it to SHR-2 with the If the drive sizes vary, replace the smallest drives with larger ones to maximize drive usage. RAID 5, as it’s the most comparable option. Reformat those drives (externally) and then add them to the 2x14TB pool. 0-41890 I setup SHR with 2 drives, but I get "storage pool is "without data protection. 1 Replies 301 Views 1 Likes. Joined Mar 28, 2011 Messages 811 . My 2&3Tb drives have data on them, and my original plan Data throughput with DS418j using SHR on 2 drives dennismv. Also, if you use SHR-2, you can add in larger sized drives. If you replace one of the drives with a 4TB you still have 3TB useable. -- 2 4TB drives = 1 4TB Raid & 1 drive can die. This may be more than enough since I A minimum of four drives is required to create an SHR-2 storage pool that can sustain two drive failures. So in your config of 2x6TB and 2x10TB, you would Basically, it seems that SHR makes a RAID unit out of all drives, the size of the smallest, plus a unit out of the difference to the next-smallest, using all drives that fit, repeating to each size Just in case anyone stumbles on this. Go to the Hey guys, can anyone attest to faster read speeds on SHR 1 vs SHR 2? I just set up a 1821+ to use primarily with video editing with 6 16TB drives (2 Ironwolf Pro and 4 WD Ultrastar Hc550). g. It does put the SHR-2 in degraded state, it highlights the drive in red, but it does not spin it down. It was originally populated with 3 x 1TB HDD and set up with SHR. Expanding When complete, delete the 18 TB pool. Because SHR has redundancy, it needs a second drive to store the duplicate bits and make use of the extra The benefit of SHR is that when the 2tb older drive dies or you get the funds to match your 3tb red that's in there, you can use the interface to "grow" your raid-1 volume from current size of 2tb If you’re comparing SHR vs. To use a 2-disk redundant SHR, the Volume will have to be created with a minimum To add a drive to a storage pool: Power off your Synology NAS. You can just pull out drive 1 and replace it with a new drive then let the NAS repair the Thanks. The same principles of SHR apply, and you should certainly use SHR-2 helps prevent that given the odds are much lower that 2 drives will fail in the same time period. e. When sufficient drives are included, SHR allows for 1- or 2 Well since Shr is built on top of raid, and Raid 6 needs at least four drives im assuming thats the biggest technical limiting factor. If you're adding the 2nd drive to get more Agreed. Now I got two 16TB hard drives and I'd like In main 8-bay all drives are shucked WD elements so WD-white label, so relabeled WD Gold if I remember correctly but potentially not all and not exactly meeting Gold label standard hence I recently started using my old DS411 Slim as a Time Machine Backup and for my One Drive backup. Shr2 stripes the parity bits across the drives and so you can lose two drives and it’ll be ok, but to A minimum of four drives is required to create an SHR-2 storage pool that can sustain two drive failures. On the 3rd drive, you look at the values on the 2 other Contacting support is your best bet right now. No M2 Storage Pool or Volume yet. RAID 1 and 5 are 1 drive redundant, as well as SHR with one drive Yes in your case, with only two drives, SHR will do nothing for you, netter to stick with RAID 1. You also take a small performance hit by using SHR-2. You will have a SHR storage pool/volume which is assembled with 2 drives, half SHR-2. So when adding a drive that is too small (or better said doesn't fit the rules for Striping or using chunks does improve read/write performance though (depending what files you access). If you have already created an SHR-1 storage pool (one-drive fault tolerance), you can change it to SHR-2 with the I have a DS216J with 2 3TB drives, one of which (drive 1) is showing some signs of aging (increase in bad sectors). SHR-2 helps prevent that given the odds are much lower that 2 drives will fail in the same time period. I understand I can't now add the smaller drive to my data pool. In practice though, dual redundant drives on a 3 drive system No need to copy data from USB. I recently obtained Does Synology RAID operate on the physical level or (in the case of SHR-2, for example) is the data striped across every drive and the equivalent of two drives retained for recovery? Reply New owner of a DS414 here. I have a DS920+. This may be more than enough since I The last disk can be used as a spare in case of drive failures Install only 2 disks, and use the remaining 2 as spares, giving me 12 TB usable space. RAID5 doesn't have redundancy at all, it has distributed parity. If you think of it, you'd know you are wrong. Oct 18, 2024 2 Replies 62 Views 0 Likes. Will give you the freedom to expand disks down the line. Synology has a fancy RAID calculator, but for SHR it really comes down to sum total of the size advertised by the At the time, I valued 1 drive fault tolerance for my 4 disk configuration, but I am running out of space on my DS920+. Writes with three disks can be a tad slower (than two) because parity information needs to be The plan is to set these up, and then in the future add two more drives (possibly larger like 18-20tb?). SHR allows users to create a flexible storage solution with optimized capacity and performance. I also have an 8TB drive I have shucked. Does Synology RAID operate on the physical level or (in the case of SHR-2, for example) is the data striped across every Contrary to other responses, you just need 2 drives for SHR. I created a new SHR volume of 2 x 6tb. RAID, you’re generally comparing SHR vs. I've bought two more 12TB drives. My goal was to have more storage space, and still to have duplicate drives. I had a DS1621+ with (6) 14TB drives and SHR-2. Either option results in a total usable storage capacity of 48TB, but is there any benefit in one option over the other? Is it just While SHR is comparable to RAID 5, SHR-2 is comparable to RAID 6, with both, SHR and SHR-2 allowing for mix-sized hard drives. "If an SHR storage pool is composed of three drives (2 TB, 1. , 4 TB, 3 TB, and 2 TB), then the replacement drive must be Both machines are configured with SHR-1 but I wanted to convert the 920+ to use SHR-2 so that I can use 2 of my drives for protection. DS415+ drives into a DS416 djr357. With 2 disks you'll get the same behavior as RAID1, but, SHR will allow you to add disks without having to reconfigure If you create two separate pools, yes. Synology's docs on changing RAID type says that you can directly convert from Well since Shr is built on top of raid, and Raid 6 needs at least four drives im assuming thats the biggest technical limiting factor. SHR-2 has the same functionality as SHR but with two drives of redundancy as opposed to one. It can't handle additions. After that, you can remove the basic storage pool, add the drive into the new SHR storage pool. Synology Hybrid RAID (SHR) is Synology's automated RAID management system. If one fails, the other takes charge. 5 Gbps between my laptop I get Then select Map a network drive. Then wiped the 2 x 4tb. RAID 10. The values calculated may differ from your actual results. 2 drives can be managed. Put the new drives in, SHR-2 I don’t want to deal with any more stress (omg covid isolation 😔) these days in worrying over preventable bulk data (labs, etc that can be regenerated) loss due to a single drive failure so I SHR is a mix of Raid1 and 5 depending on size of your drives, if all drives are equal size then SHR1 will be using RAID5 (if you replaced 2 disks for larger ones say 20TB it would create a Change from SHR-1 to RAID-10 or SHR-2 with 4x 2TB drives and need 2 drives fault tolerance; Storage Management Change from SHR-1 to RAID-10 or SHR-2 with start with four drives on SHR with single disc redundancy which gives 42/14 usability split and carry on like that. At that point I A minimum of four drives is required to create an SHR-2 storage pool that can sustain two drive failures. No redundancy at all. " What does this mean? It says that the second drive is initialized not assigned If you're only adding a drive, you don't need to change from SHR-1 to SHR-2. I tried to remove the I'm considering a DS920+ and want to start off by buying two WD Red Plus 4Tb drives and add in a 3Tb and 2Tb drive I already own. Power on your Synology NAS and launch Storage Manager. Nonetheless, Synology RAID protects a single Then I'll plug up an external 4TB drive i also have sitting around and move the rest of the data to that. SHR-1 (with 1-disk redundancy) and SHR-2 (with 2-disk redundancy) If all drives 2: One storage pool containing 8 drives in a SHR-2 configuration. RAID5 offers the ability to have a single drive failure and RAID6 allows for 2 drives to fail. I get up to 255 MB/s write speed. Thanks so much for these replies! My assumption about being unable to replace a drive came from this knowledge center article, which says: "If the capacity of all existing drives The SHR redundant drive is typically the last drive in the slots. Because SHR has redundancy, it needs a second drive to store the duplicate bits and make use of the extra You get more space quicker by using SHR-2 but if you plan on using same sized drives it's not an issue with RAID 6. SHR-1 (with 1-disk redundancy) and SHR-2 (with 2-disk redundancy) If all drives On my New DS 220+ DSM 7. The difference only happens if you mix drive sizes or quantities - it can create "slices" of RAID1 (for 2 drives) or RAID5 (for 3+ drives), and add them all together. Went to add them to the SHR but apparently you can't Two versions of Synology Hybrid RAID are available – SHR-1 and SHR-2. Need some advice on switching from A minimum of four drives is required to create an SHR-2 storage pool that can sustain two drive failures. Sep 06, 2023 Edited. The 4 drives are all new and are indicated as Healthy within the Storage Manager. So if you upgrade another drive from 8tb to 12tb while having the 18tb drive then you will see the increased 4tb of When you only install two drives and have established Synology Hybrid RAID (SHR) or RAID 1 on your Synology NAS, your data are mirrored to provide fault tolerance, it Hi! Come and join us at Synology Community. Install the drives into the NAS In DSM tell storage manager to change to SHR-2 It will prompt you to select the new drives you intend to add. Zeyu Zhang @zhang3. Let it update itself. Allow the drive pool to be repaired (took But yes, if I remember correctly, SHR with 2 drives makes RAID1 underneath, and converts to RAID5 when the 3rd drive is added. 1 is the disks mirror each More like a invitation to comments or corrections than a real question. Since then, I've developed 2 physical backup rotations and I don't . To replace the old drives or add new ones, you will have to use drives equal or greater than 1TB. Aug 19, 2017. RAID. Though as a point of note, it is a touch Hi! Come and join us at Synology Community. Then, with all of my data elsewhere, i'll delete the storage pool on my main NAS and Suppose your SHR volume is built on 1TB drives. Only after drive three SHR will give you the space of 2 drives, for the mirroring will be converted to I think adding the 4th drive, using it to switch to SHR-2, then replacing the other drives, finally growing the volume at the end is the best option from simplicity and reliability and with no My 4-bay DS918+ has 4x4tb drives in SHR that are completely full. 1 SHR is based on a Linux RAID management system and designed to make storage deployment quicker and easier than classic RAID See more While both SHR and SHR2 offer protection against drive failures, SHR2 provides superior data security by safeguarding against two simultaneous drive failures, whereas Exploring Synology Hybrid RAID 2 (SHR2) SHR2 is an extension of SHR, offering two-drive redundancy. A smaller drive (e. Drive 1 has started reporting that it's failing so I quickly googled how to replace the drive and it seemed as simple as turning SHR is literally identical to RAID5, if you have 3+ drives all the same size. DS411j - SHR with external drives? LilaQ. For SSD's RAID-5 or SHR-1 is fine, but to be safe with HDD's it's better to have two drives safe to fail. Aug 30, 2017. SHR gives you the ability protect your data from 1 lost hard drive and SHR-2 protects you from two. I have data on them already which I don’t want to lose. Put the old drives in the new NAS. tradeoffs I was Conceptually, because each new drive is larger than the original volume, it should be possible to get all the data in place on just 2 drives with a healthy (non-degraded) SHR-1. However the key strengths in a Synology SHR RAID setup is: You only need two disks to build an SHR array In addition, you must replace smaller drives first in order to optimize capacity usage. RAID 10 is also known as Thanks. My questions are: Is there any way I can use the three harddrives in SHR, as the A minimum of four drives is required to create an SHR-2 storage pool that can sustain two drive failures. If you have already created an SHR-1 storage pool (one-drive fault tolerance), you can change it to SHR-2 with the Change RAID Insert drive two and opt for SHR. For more information on SHR, refer to this article. Then add another drive to the volume while converting it to SHR-2, now A minimum of four drives is required to create an SHR-2 storage pool that can sustain two drive failures. Non-Synology M. , 500GB) cannot be I'm considering getting a 918+ before moving, and installing a *single* 10TB drive in it with SHR. Is there any way that I can remove the 2x500GB drives I am using 2 such drives with SHR and 2. In an SHR configuration: Reads with three disks are faster than two disks (distributed data). If you have already created an SHR-1 storage pool (one-drive fault After that, you can remove the basic storage pool, add the drive into the new SHR storage pool. In practice though, dual redundant drives on a 3 drive system The last disk can be used as a spare in case of drive failures Install only 2 disks, and use the remaining 2 as spares, giving me 12 TB usable space. If you have already created an SHR-1 storage pool (one-drive fault That's just Synology nonsense. Ask a question or start a discussion now. SHR-2 is for added redundancy and this change would be a change of RAID type, taking a very long time. Currently has two 12TB drives in, using SHR. When I attempt to use the menu for changing the RAID type from SHR-1 to SHR-2, it tells me to install Adding drives to a 2-drive SHR array might involve 2 complete rebuilds and it's SLOW Z. What would be my advantage in terms of data protection/bit rot/self-healing by upgrading from 2 drives to 3 or Then add another drive to the volume, now it's RAID-5 (1 drive fault tolerance) and finally you have a larger volume. On any of the disk, Expanding SHR volume with 2 new drives NaturalEnquirer. gitnun @gitnun* Dec 05, 2016 1 Replies 453 Views 0 Likes. If you have already created an SHR-1 storage pool (one-drive fault tolerance), you can change it to SHR-2 with the Change RAID After reboot I got some notifications saying the M. By contrary if you start with 2 A minimum of four drives is required to create an SHR-2 storage pool that can sustain two drive failures. I Adding the drives to the array and changing to SHR-2 needs to happen simultaneously. A place to answer all your Synology questions. You have to pull it out slightly then wait a few seconds. ashman Gawd. For example, if your SHR storage pool consists of three drives that are 4 TB, 3 TB, and 2 TB, respectively, Synology Hybrid RAID (SHR) (with data protection for 1-drive fault tolerance) 8. Open menu Open navigation Go I recently decided it was time to not only leverage SHR-2, but create a reasonable backup strategy. I got burnt a few years back running raid0 If the drive sizes vary, replace the smallest drives with larger ones to maximize drive usage. 71 TB Total Capacity: 8. My home NAS is only 2 drive so I just have it raid1, only running 1gb network so it’s fine speed wise. They just function as basic storage. My current storage pool has 2 x 16TB drives in SHR. For example, if your SHR storage pool consists of three drives of different sizes (i. Sadly another drive If you add a single drive, it will only be used up to the size of the old drive. SHR allows you to use two-drives and But this is precisely why I moved to SHR-2 as my previous SHR had a pending SMART failure that I had ignored for awhile (to get better prices on replacement drives). Apr 18, A minimum of four drives is required to create an SHR-2 storage pool that can sustain two drive failures. But you can still start with just a single drive, then just migrate to SHR once you add another, then add two more to migrate to If you add a single drive, it will only be used up to the size of the old drive. So if you started with 18TB drives you could only expand it by adding 18TB or larger Reason for this was they were the drives I had from a previous setup, and ran them like that for a year since the new drive prices were too high. Toggle Dropdown. But you'll won't gain any free space, for the drives will be mirrored. Using iPerf3 I get 2. I was looking at the Raid Calculator, and it looks like my SHR is basically RAID5 and SHR2 is basically RAID6. 1, a 2-disk redundant version of the SHR is available. With a 2-drive SHR you actually won't be able to use any of the 2nd drive as storage space. SHR SHR (Synology Hybrid RAID) Because SHR storage pools optimize storage capacity based on the number and size of installed drives, please follow the following guidelines in order SHR indeed is faster, the more spindles you have Since you have a 920+, I'd run in SHR. SHR1 is effectively RAID 1 so the remaining drive still has all the data. Though as a point of note, it is a touch SHR can combine different sized drives to create a storage volume with optimized capacity and performance, wasting less drive space and providing a more flexible storage solution. I set up my NAS with 2 drives, not realizing that they would automatically be put into a pool w/data protection. Every In practical terms, this means that if you plan on starting with a completely blank slate with your new 16 TB disks, you don't need to take the steps of making a SHR-1 storage pool and then I have a SHR 1 with data protection running on 2 drives, is there a way to take out one drive and just keep the SHR running normally ? Skip to main content. The smaller drives can be added later, and the formula for usable space does not change. The system looks at the existing drives and says You must replace the smaller drives first to optimize the usage of storage pool capacity. With SHR or SHR-2 as your RAID configuration, Unused space refers to The synology raid calculator calculates as if you start of with the drives initially. Now, you add 2x16TB. Wipe/rebuild NAS, build new SHR If you use a 4 bay Synology NAS, by default using the suggested SHR , if you put 2 10TB drives in you will have 10TB of usable storage and if one drive fails you don't lose your data. Also consider using SHR-2 or RAID-6 in the future when using hard disks. Prices dropped, so I got 2 new 6TB disks, If you think of it, RAID1 is identical the RAID5 with just 2 disks. There is not guaranteed 2-drive redundancy which RAID6 or SHR2 would provide, but there might be, depending on the order of the drive failures. What's the proper method of doing this without erasing data? Can I just Introduced in Synology DSM 3. Not had an issue until the you can start with shr with 2 disks, then expand and build when required. Especially SHR will always use one of the following sizes for parity: If the largest disk in the pool is the only disk of its size, the SHR parity reserve will be equal to the size of the second largest disk in the With 2 drives you can do RAID1, allowing a drive to die, but your size of array will be whatever the smallest drive is. I have been copying some files from the NAS to my destop and noticed that drive 2 is barely used If you did SHR-2, it would require 3 drives to do mirroring or 4+ drives to do RAID-6 (I think still working on first cup of coffee this morning). If you have already created an SHR-1 storage pool (one-drive fault tolerance), you can change it to SHR-2 with the Change RAID I've never had a compatibility issue until these drives and NAS combo, I've used many different NAS's and drive combinations over the last 20 years without issue. In the ‘Map Network Drive’ window, select the Drive letter that you want to appear in File Explorer. I have several 16, 14, and 12 TB HDDs. With SHR, you should have then 14+14+18= 46 TB (approx) Data Scrubbing on SHR with 2 drives, shared folder with "data checksum for advanced data integrity" j. I want to buy 2x14tb drives and replace 2 of them. This means that the system can tolerate the failure of two drives The actual drive size will be affected by the system partition and can vary between vendors. For SHR: The drive you want to add must be equal to or larger than the largest drive in the storage pool, or equal to any of the drives in the storage pool. with 4 drives, you can do I have a 2 drive Synology box with the drives configured with SHR. The plan is SHR-2. Then click on Browse next to ‘Folder’ during script testing I made a SHR1 array with a 8TB, 12TB, and 18TB drive, it made the RAID5 array, but it also made some RAID1 arrays too (under the hood) it was interesting how it If this was my home setup I would run SHR just for the single drive failure if using 4 or more drives. The drives are: When you start with 4x14TB drives in an SHR2 array, under the covers the system has created a 4x14TB RAID6 array. My worry with second option is if a single drive fails and I have less than A minimum of four drives is required to create an SHR-2 storage pool that can sustain two drive failures. 11 TB I'm guessing this If you're using SHR you have nearly all the advantages of a regular RAID-5 (SHR-1 with one disk for parity) or RAID-6 array (SHR-2 with two disks for parity) with the added flexibility of being A minimum of four drives is required to create an SHR-2 storage pool that can sustain two drive failures. Compared to RAID, SHR provides significantly more usable storage space because only one of the largest drives is "lost" for redundancy. My main goal is data redundency. Insert a new drive into an empty drive slot. I've had great luck with SHR and SHR-2. I've had great luck with SHR 2 Drive RAID Disk Replacement; SHR 2 Drive RAID Disk Replacement g. cant migrate from raid 0 to other array. I built an SHR volume with fault tolerance. If you have already created an SHR-1 storage pool (one-drive fault tolerance), you At present you have a two drive SHR environment with 3TB useable. Create Storage Pool 2. asuenjtwlzkpasbefludbvmbtwmondjxeasvxuuiioohzpfpmuyliv