Synology shr vs shr2. May 5, 2025 · Compare SHR vs. I didn't know that Synology put LVM on the disks and then mdraid on top of it. The original plan was to use RAID 10, and that is probably what I am sticking with. Um WHY? Jul 6, 2016 · What is the difference between SHR and RAID? Synology Hybrid RAID or SHR, has been around for quite a while now, and though it has not make the big impact that Synology NAS’ Btrfs file system has, it is still an increasing popular choice for many when it comes to protecting their hardware and their Feb 6, 2018 · What is the difference between SHR and RAID? Synology Hybrid RAID or SHR, has been around for quite a while now, and though it has not make the big impact that Synology NAS’ Btrfs file system has, it is still an increasing popular choice for many when it comes to protecting their hardware and their Nov 7, 2022 · Synology Knowledge Center offers comprehensive support, providing answers to frequently asked questions, troubleshooting steps, software tutorials, and all the technical documentation you may need. Let us take a quick look at RAID ( the classic RAID) first before we look at SHR. SHR allows users to create a flexible storage solution with optimized capacity and performance. So do you need high availability or not? Aug 28, 2023 · Le SHR et le SHR2 ne sont pas les seules configurations disponibles sur un serveur NAS Synology. the speed of RAID 10, but i haven't been able to find any good performance benchmarks for read and write operations. Archived post. SHR2 would use 2 disks as failover devices instead of just one. All drives have different capacities. Recovering data from it requires an intelligent approach. In the next world i will probaly just buy as big of drives as i can afford and shove them in there and do addon storage in the future. Something that raid 5 is unable to do without up-sizing all drives at once. What are the pros and cons of SHR vs Basic for initializing the single disk. Learn more about this RAID configuration in this article! Questions: What are thoughts on shifting to SHR2 - worth it given my setup? What have you chosen (SHR1 or SHR2) and why? Bonus question: can you downgrade from SHR2 to SHR1? forum posts seem to suggest its possible, but the Synology change raid info seems to suggest its only from SHR1 to SHR2 and not the other way round. Learn how each RAID type protects your important data during hard disk malfunctions. Synology's SHR: main advantage over QNAP? I was considering as a main advantage of the Synology models over QNAP models that in Synology you have SHR, which could be pretty useful if you mix disks of different capacities and/or not follow a standard RAID disposition. SHR will make use of the extra storage at the 2x4 + 2x8 scenario whereas RAID5 will not. Nov 7, 2022 · SHR, on the other hand, allows a storage pool to be expanded as soon as two of the drives are upgraded and can form a redundant storage array. A place to answer all your Synology questions. It also provides protection against a single drive failure. Mar 10, 2012 · As you seem undecided on the number and size of disks, I think SHR is good for you :) Generally there is no performance penalty with SHR (vs RAID) for the simple reason that if you have three 3TB disks in SHR, under the hood the system builds just a plain RAID 5 array. I am approaching the 70% limit and want to store more video and backup snapshots, hence the upgrade. I'm having second thoughts now that I read RAID-6 is faster. One nice option i can see is using a 5 drive and hotspare setup (assuming synology supports hotspare). 2 Is there any practical reason why it is important to you to have the best performance possible? Because there are good reasons to pick SHR-1 over RAID-10, even if the performance were a bit worse, mainly the superior flexibility for future expansion you get with an SHR-1 storage pool. SHR your total space will be your total size minus one disk, SH2 will give you two disks. Nov 23, 2017 · Anyway the Synology seems to be limited to about 425MB/s write speed on 10x4tb WD RE sata3 on SHR2 using two 10g capable HyperV servers pushing 1 file each in the 100gb-2tb size range. And if you want the slight increase in technical complexity, since SHR (2) would use lvm and little arrays joined together to do it. Mar 20, 2023 · Hi I just purchased a new DS1821+ NAS and 5x 14TB drives. Can anyone explain this to me, as I am new Dec 5, 2019 · Hi! Come and join us at Synology Community. Mar 14, 2020 · My current DS214 has only 2TB HDDs in a SHR configuration. From searching I learned that: Raid 5 = SHR and Raid 6 = SHR2. SHR (Synology Hybrid RAID) allows you to use different size drives in your array and gives you more flexibility in terms of drive upgrades and replacements. com/2019/10/23/what-is-raid-understanding-the-different-raid-levels-for-your-nas/Large Use this interactive tool to estimate the storage space of your Synology NAS when paired with different size hard drives and RAID levels. A 4 disk RAID5 for you will have 21. If I were to start all over and set these drives in RAID-6, how much performance do you think I would get? My dd command line benchmarks show that the volume Apr 6, 2022 · Hi Sorry for this kinds of lame question as I've read SO many posts about how long it takes to convert from SHR to SHR-2. Would you recommend I go with SHR2 or RAID10? The URE rate for the disks is 10^15, so not inclined to go with SHR/RAID5 as a 72% chance of a successful rebuild is not good enough (from RAID 5 and Uncorrectable Read Errors ). In total I think I need somewhere around 20tb usable disk space for future proofing. Drives can be carried over to the new SHR-supported Synology Synology Hybrid RAID – Weaknesses A bit slower than RAID 1 and RAID 0 but quite similar speed to RAID 5 and 6. Feb 12, 2015 · Title pretty much sums it up. I just added 2x4TB in my DS416play. I am wondering if SHR is really a good option or if i should go back to traditional raid? The Synology is used for mixed storage of the Surveillance Station + PLEX. May 5, 2025 · Understanding how to use the Synology RAID calculator is important, but it's equally important to know which RAID type (SHR vs RAID) is best! Sep 10, 2024 · If the drive fails, Synology can still access the data from the full volume. SHR2 vs. Are you able to sacrifice that extra 8TB? In terms of performance you will have better performance with a RAID5 vs Sep 27, 2018 · SHR vs SHR2 and ext4 vs Btrfs. This makes it especially suitable for users who are new to RAID technology Still undecided about what storage system you will use? Worry not! This guide explains Synology Hybrid RAID (SHR) and how it differs from a Classic RAID. Should I choose SHR-2 or RAID6? Until just a moment ago, I didn’t really understand the difference. All the drives are the same size so I don't understand why it would make a difference. , SHR-2), the new storage will be available after you add drives or expand existing ones. 1 volume on each giving a total of 32 TB. Regardless of raid type used, one is not locked in any way into synology as one can access the data on a linux system using lvm and mdm. SHR is a hybrid version of RAID, it lets you have different size disks and it will create the RAID by itself. SHR is based on a Linux RAID system. What can I do? The artical in the Knowledge Base is misleading: Note: SHR-1 with the following drive configurations may require two additional drives when changing to SHR-2: There are only two drives. I have a DS1821+ currently containing 8 x 8TB drives configured as 4 storage pools of SHR-1. RAID 6 vs SHR2? Omg how do we choose where to begin?. I am considering moving to SHR2 by buying a new disk but this note is fairly confusing to understand and Synology hasn't provided any examples: In a RAID array comprising three or more Sep 21, 2018 · Use the RAID calculator that Synology has to compare your scenario with RAID5 vs SHR. It's no more complicated than standard RAID 5/6 - as a matter of fact Synology makes it pretty easy. I now have 2 options: Continue to use SHR w. Aug 7, 2021 · Hi. Aug 13, 2013 · When you look at the Synology calculator you have a choice between SHR (RAID5) and SHR2 (RAID6). So other I have DS1522+ (5 bay) with 4 disks. Aug 14, 2019 · There is still open question from my side: Is SHR better than RAID an when? To be sure I will use SHR1 for specific type of SHR (mentioned in Synology web as SHR), otherwise SHR is general term. Learn which NAS setup is safer and more recoverable after failure, and see real recovery case examples. I was originally keen to go with either SHR-1 or RAID 5, but some people have informed me that drives can often fail during long rebuilds. I use SHR2/RAID6 on all main nas's regardless of bay size (but usually recommend minimum 5 bay so still have 3 drives worth of space vs a SHR1 with 4 drives) backup nas I use SHR1/RAID5 unless the backup is offsite Please refer to your Synology product's DataSheet to understand the software specifications supported by each model. WD Red vs. Feb 19, 2022 · What is Synology SHR - Synology Hybrid RAID Synology SHR is a RAID, which allows you to mix hard drives with different capacities. I can mix and match disks of different brands and sizes as time goes on and all I do is stick it in the enclosure and click a button or two?! Am I correct in my assessment that this is a killer feature of Synology systems that support SHR?. Apr 24, 2014 · SHR-2 is a RAID-6 style setup which always (100%) offers recovery after a second disk failure, due to the parity setup, but it is slower than RAID-10. SHR-2, etc. Looking for insights. 2 tebibytes. May 5, 2025 · Screenshot from the Synology RAID Calculator SHR Synology Hybrid RAID is an automated management system, which is a fancy way of saying that you will have the flexibility to use different-sized hard drives in an array, while actually utilizing some of the storage space. SHR is just a fancy RAID 5 with the ability to use unequal sized drives. SHR2: Use for 8+ drive arrays. I'm running DSM 7. Am setting up my firsdt ever NAS - a DS215j with only ONE Drive right now. Dec 26, 2012 · Generally with SHR vs RAID5 and SHR-2 vs RAID6 works like this: - if the disks are all same size -> SHR uses a RAID structure, no overhead, end of the story. If you want to expand an SHR with two-drive fault tolerance (i. Your decision to use SHR-2 (Synology Hybrid RAID 2-disk redundancy) is indeed a consideration based on your storage needs and backup strategy. When I click onto my storage pool and chose "Change RAID Sep 10, 2024 · Synology Hybrid RAID is an automated RAID management system specifically developed for Synology NAS systems. SHR1 vs SHR2 comes down to your appetite for risk, as the latter can withstand the failure of two drives simultaneously, versus the loss of a single drive with SHR1. It's not yet a perfect backup as if your NAS gets destroyed all data is gone, but at least it would help you recover from situations where you accidentally delete (or otherwise lose) files. RAID? Also, at the moment - is there any sort of consensus re: IronWolf vs. (At least that's what Jul 3, 2018 · Is there a difference in rebuild times between the above RAID configurations? And what is the rebuild time of a 10 TB drive? From what I'm aware, the rebuild time of SHR-1 is worse than RAID 5. The ease and flexibility when swapping drives with SHR-1 vs. That also comes with the same level of loss of space. Since I'm working with high capacity drives and rebuilding As a newbie starting to get into redundant network storage SHR seems impossibly awesome to me. Seems like SHR-2 having two drives of redundancy would be basically the same, no? No, because SHR2 has 2 drive parity and SHR1 + hot spare is still just 1 drive parity. Apparently SHR builds the volume out of lots of little LVs (actually using linux lvm?), while RAID6 builds the volume out of parity stripes on matching devices—right? Mar 1, 2020 · I have just set up my DS1092+ in the SHR mode, but have decided to switch to SHR2. Nov 7, 2022 · What is SHR? Synology Hybrid RAID (SHR) is Synology's automated RAID management system. Of course - I did not read this before I actually started my conversion. Looking at SHR, i like the idea of fexabilkity of expading storage with SHR. e. New comments cannot be posted and votes cannot be cast. I am now trying to find way to change the SHR configuration to SHR2. as under rhe hood shr is either raid1 or raid5 sets, while shr2 is raid6, but withbthe difference that shr uses capacity more efficiently combining these raid sets together. SHR-2 provides data redundancy, which is a valuable feature for data protection but comes at the cost of reduced capacity efficiency. Which would you recommend I use, RAID-6 or SHR2? I're recommend SHR-2 over RAID-6 all day long, but in your case I'd actually recommend SHR-1 and regular data scrubs (say every 1-3 months). SHR1 vs RAID1 - two identical disk - single disk redundancy for both of Dec 15, 2020 · 最近剛入手Synology Ds1520+ 手邊硬碟是4T*2 2T*2 目前是規劃走Raid 6 但SHR與SHR2可相容不同容量硬碟 似乎又蠻方便的，安全性與Raid 6相當， 想請教各位，這三種格式在考慮安全 與未來升級擴充的前題下，大家較偏 向那個格式？ Correct, with SHR + hot spare you are essentially betting that between potential failure and until the pool re-builds, nothing bad happens to any of other drives in the pool. SHR1 vs. So. Feb 28, 2024 · Yes, it is possible to convert your Synology NAS from SHR-1 (Synology Hybrid RAID 1) to SHR-2 (Synology Hybrid RAID 2) without having to move all the data off the NAS. Figure I should make the change now before I get more & bigger HDD. You even get the ability to read and restore SHR volumes from non-Synology systems if that edge case ever comes up, you just need a linux machine. SHR will allow users to handle RAID management, expand storage and maximize storage capability and meet the needs of new users who are unfamiliar with RAID types. TLDR; If you're perplexed by the choice of RAID 6, SHR2 or RAID 10, I recommend SHR. I'll buy the DS920+ but I'm on a budget, so I'll buy a single hard drive for now and I will add new ones in the future. I have now got to grips with the Synology RAID calculator a bit more and have decided to spend the next week or so re-configuring the system. There's little reason to not use SHR / SHR2 on Synology systems; at best you gain extra flexibility and at worst you just have RAID5 as per usual. Is there any other reason to use SHR-2 over RAID 6? Synology offers a RAID alternative, SHR, which operates slightly different than a standard RAID. I understand that in general, raid1 has better performance and has a more simple I’m a happy user - great sleeper btw - of Synology 3-2-1 Backup Strategy and NAS in SHR-2, simply because a NAS SHR-2/RAID-6 is about disk redundancy and is and never will be a backup device on its own. Has Synology SHR always put mdraid on top of LVM? I just bought an 8 bay DS1817+ to upgrade from my 4 bay DS416j, which I set up a long time ago with SHR. Mar 31, 2025 · Hot Spare: If you have reasonable access to your NAS, avoid hot spare assignment. SHR will let you lose one disk and be able to recreate the volume, SHR2 will let you lose two disks. This makes it especially suitable for users who are new to RAID technology Aug 17, 2022 · Looking at changing my RAID Type from SHR-1 to SHR-2 since I have a 12 Bay NAS and obviously have the option to expand that to 24 Bays with an expansion unit. I’m setting up a new Synology DS1621+ NAS with 6 x 8TB Seagate Ironwolf NAS disks, mainly as a SOHO file server (documents, photos, media, backups, etc). This makes it especially suitable for users who are new to RAID technology SHR versus SHR2 is all about uptime/availability. I can only suppose that SHR and SHR2 are a making of Synology with some extra magic in there? Again the same youtuber (HdEozE2gN9I) says that who ever uses Raid 5/6 is stupid. Oct 31, 2020 · Has anyone done any testing of real-world benchmarking between SHR-1 and SHR-2, beyond "feeling it's faster" or "being more reliable" (in subjective musings), that they can provide? I have no problem with agreeing with sspr that a NAS starting out with 4-5 disks, but soon to be 8 (within 2-3 months) should be set up with SHR1, instead of SHR2, but I need actual data/facts, not assumptions. Feb 20, 2017 · I understand that SHR supports both a one-disk and a two-disk redundancy system - similar to RAID 5 vs RAID 6. Aug 28, 2023 · SHR und SHR2 sind Datenschutzlösungen, die auf Synology NAS entwickelt wurden, um den Speicherplatz zu maximieren. 1. Any opinions on the best option? Synology Knowledge Center offers comprehensive support, providing answers to frequently asked questions, troubleshooting steps, software tutorials, and all the technical documentation you may need. What I had expected, was something like when previously adding another disk SHR-2 and RAID 6 seem to be about the same with the difference of SHR-2 supporting different size drives. I do a lot of photo/video editing and will Buying my first Synology NAS here. 1 and 10x 16TB disks with a single Storage Pool (SHR) and started conversion by adding the 10th disk. Sep 25, 2021 · In short, using SHR-1n, the 10Gb DS1817 network adapter is only interesting with non-encrypted folders (>110MB/s). I'm using SHR2, I'm not a fan of Unraid's parity scheme, and besides the Synology hardware worked out cheaper especially once you take into account the power consumption and OS. Of course that risk isn't zero, but there are also other risks to your data than a drive failure Jan 6, 2024 · DS1522+ on the way – want to make sure I set it up right, buy the right additions, RAID vs SHR vs. ServeTheHome's calculator only works when all of the drives in the array are the same size. Fully loaded, you can actually somewhat utilize 10Gbe with SHR-2, but with only 4 drives, SHR-2 is somewhat stupid - either get more drives or use RAID10. 1 SHR is based on a Linux RAID management system and designed to make storage deployment quicker and easier than classic RAID systems. Learn more What is RAID and why do I need it on my NAS Drive? https://nascompares. Oct 17, 2023 · What is SHR (Synology Hybrid RAID)? What are the pros and cons of SHR? What are the differences between it and ordinary RAID? Here are the answers. I will be using this mostly for my small business, but will also be using this partially for personal/home storage. Synology 知識中心為您提供全方位的技術支援，包含常見問題解答、疑難排解步驟、軟體應用教學，以及您可能需要的所有技術 Jun 25, 2024 · Compare SHR and RAID from a data recovery perspective. This took 24 hours. Nov 11, 2024 · SHR是群暉專門的磁碟陣列技術，SHR可以結合不同硬碟容量和規格，擁有靈活性和高效率的資料儲存方式，並具備資料動態調整和容錯性，我們介紹SHR的基礎知識，最後提供SHR資料救援的服務。 Doesn’t matter with 4 disks obviously, but with 8 full bays, SHR-2/RAID6 you loose two disks for redundancy whereas with RAID10 you loose half of the disks for redundancy. 26 MB/sec and below using SMB/AFP (120/180MB/s). a hot spare Convert to SHR-2 I have tried searching "SHR hot spare vs SHR 2", but I haven't found exactly what I'm looking for. RAID 10 is also a concern, albeit secondary to performance and available storage. Using SHR (RAID5) would give me more usable storage long term. Ask a question or start a discussion now. SHR is raid 5 with added flexibility of allowing you to add a new drive of a larger size down the road. Jul 1, 2025 · How to Recover Data from Synology Hybrid RAID Synology Hybrid RAID (SHR) is a distinctive and innovative RAID technology, meticulously crafted for Synology NAS (Network Attached Storage) systems. You should know that when using SHR/SHR2, after converting from terabytes to tebibytes, you will also need to subtract 4% of the usable space for Btrfs overhead, so your final usable space under SHR for four 14 TB drives will be around 34. Backups are still needed in both cases. Synology Hybrid RAID (SHR) Synology Hybrid RAID (SHR) is an automated RAID management system, designed to simplify storage management and meet the needs of new users who are unfamiliar with RAID types. This makes it especially suitable for users who are new to RAID technology Hi guys, I now own a synology 420+ nas with 2 16TB iron wolf hard drives (woo!) I’m planning on using the NAS to work with large files. Thanks! Archived post. Designed to merge flexibility, efficiency, and user-friendliness, SHR excels in maximizing storage potential while bolstering data security. RAID5 offers the ability to have a single drive failure and RAID6 allows for 2 drives to fail. Oct 29, 2021 · SHR is basically RAID5 and SHR2 is basically RAID6. Comparing both these RAID implementation types on Synology NAS's, and why SHR provides significant benefits and provides better value for money from your NAS May 22, 2017 · The difference is 54TB of available space using SHR vs 30TB available space using RAID 10. Am I Aug 30, 2022 · BTRFS is my choice. Three or more drives in the RAID Array contain a pair of I recently installed six 16TB drives in my Synology 1819+ in SHR-2 configuration. If another drive fails during rebuilt its all gone, which is not the case in 2 drive parity. Generally, unless you have over 7 drives, using two drives for parity doesn't make sense. What I have decided is to have either: 1: Two storage pools, each containing four drives in a SHR-1 configuration. Jan 16, 2015 · Note that having two BASIC (or SHR) 1-disk volumes and run a periodical one-way sync is a better solution than one 2-disk SHR volume if your intention is to have some sort of backup. For fewer HDDs, of course SHR-1 should be sufficient, but for more disks I imagine it'd safer to use SHR-2. Feb 21, 2024 · Synology SHR is an automated RAID management system that makes storage volume deployment easier than traditional RAID systems. Nov 7, 2022 · Synology Knowledge Center offers comprehensive support, providing answers to frequently asked questions, troubleshooting steps, software tutorials, and all the technical documentation you may need. This will involve pulling pointclouds from the synology into ram and working on the file locally. It will wear the hot spare drive, and decrease your flexibility in dealing with a faulty drive. com Apr 12, 2015 · My questions comes down to performance only, which one is better RAID 6 or SHR2? Mar 31, 2025 · Would it be better to run it as a SHR-2? The SHR-2 would put ongoing stress on the 4th drive, which won't see much action until it gets called into service if it were a Hot Spare. Sep 25, 2019 · I've got the same issue. It allows for you to grow an array overtime with disks of di 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). Das Synology Knowledge Center bietet umfassenden Support mit Antworten auf häufig gestellte Fragen, Problembehebungen, Anleitungen zu Software und allen möglichen technischen Dokumentationen. See full list on onecomputerguy. 0. other drives for Synology storage? Thanks in advance! Archived post. I have no need of RAID and even if/when I populate the 2nd drive bay I will not need or want RAID. Read speed is limited to 233. And I could not convert it to SHR2 now. For smaller arrays, SHR. Apr 16, 2020 · I'm considering trade-offs between the extra available storage provided by SHR-1 vs. My intent was to use SHR2, However upon set-up I seem to have configured it to SHR. During recovery, a RAID-6 (SHR-2) setup also requires more resources. Jun 3, 2025 · What is Synology Hybrid RAID (SHR)? Synology Hybrid RAID (SHR) is an automated RAID management system developed by Synology that is designed to simplify storage management and maximize data capacity while still providing data protection. 2 x 18TB and 2 x 20TB, they are all in a single SHR1 volume right now. 何謂 SHR（Synology Hybrid RAID）與 SHR2？ SHR 是 Synology 獨有的運算技術，SHR 最少需要兩顆硬碟，一顆硬碟容錯。 SHR-2 最少需要四顆硬碟，有兩顆硬碟容錯。 大小不一的硬碟容量，SHR 與 RAID 5 的比較 基本上這樣的說明可能不太明顯，以下以實際的案例來替大家試算 I think deciding between SHR2 and raid6 is basically as simple as deciding when you want your extra space to show up when you increase drive sizes. Just one suggestion: if you are unsure about size of disks, remember to start with smallest disk you are going to use: if you Aug 28, 2023 · SHR y SHR2 son soluciones de protección de datos desarrolladas para Synology NAS con el fin de maximizar el espacio de almacenamiento. 6TB for RAID6. My question relates to the performance difference between raid1 and SHR. SHR is a good option if you plan to upgrade your drives in the future or if you have drives of different sizes. Les configurations RAID traditionnelles telles que RAID 1, 5, 6 et 10 existent depuis des années et offrent diverses options pour équilibrer les performances, la protection des données et l’efficacité du stockage. If you plan to use drives of different capacities to compose a RAID, it is recommended to use SHR or SHR-2 to minimize the waste of unused space. Also valid for RAID. But then you also have the option of marking a disk as a 'hot spare' which basically accomplishes the same thing but in a different way. Running those data scrubs will greatly reduce the risk of a 2nd drive failure during a RAID array rebuild. I find that my storage pool 1, I only have one at this time, states that it is a " Snyology Hybrid RAID (SHR) (with data protection for 2-drive fault tolerence) " I understood the 2-drive protection was only with the SHR2, which is what i was planning on switching to. Starting out with 3 x 4TB drives should be enough (8TB useable space), but disk space has a way of getting occupied over the years. Is that The only difference? I plan to use the same size drives and I hear that RAID 6 is slightly faster. 8TB of usable storage vs 14. I recently purchased a Synology DS1618+ and have three 6TB Seagate Ironwolf Pro drives arriving soon as well. SHR2 with our detailed Synology RAID guide. However, it's important to note that this process involves some risk, as any modification to your RAID configuration carries the potential for data loss if something goes wrong. kkqj cov2 v7w qkd hc q1ijko mn iq5 akalngoe shj