RAID (Redundant Array of Inexpensive Disks or Drives, or Redundant Array of Independent Disks) is a data storage virtualization technology that combines multiple physical disk drive components into one or more logical units for the purposes of data redundancy, performance improvement, or both. This was in contrast to the previous concept of highly reliable mainframe disk drives referred to as "single large expensive disk" (SLED).Data is distributed across the drives in one of several ways, referred to as RAID levels, depending on the required level of redundancy and performance. The different schemes, or data distribution layouts, are named by the word "RAID" followed by a number, for example RAID 0 or RAID 1. Each scheme, or RAID level, provides a different balance among the key goals: reliability, availability, performance, and capacity. RAID levels greater than RAID 0 provide protection against unrecoverable sector read errors, as well as against failures of whole physical drives.

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  1. rajalot

    After a system partition failure and just avoiding major data loss, I'm looking for some advice on the best configuration/RAID setup for my DS218Play!

    Hey everyone - hope you've been keeping safe and well :) I recently experienced a System Partition Failure due to a dislodged drive - therefore reverting the volume to Read only status. I had a single volume configuration, with a JBOD Raid Type. So after spending a good week and a half copying...
  2. J

    Need help figuring this out - DS218+ HDD failure, Plex migration to SSD and different raid configuration

    So, this is a head scratcher for me and need help figuring this out. In an endeavor to ensure that this goes according to plan, I look to you, the Synology geniuses, to guide me. I currently have the Synology DS218+ that I use as a Plex Media Server but also use for backups. One of my hard...
  3. D

    Can I do this with DS920+ Raid 1 and a plain drive

    I want to have 2 drives in a mirrored configuration and one drive as just a plain drive. The plain drive will just host a bunch of pictures, that are already backed up to blu-ray. After a lot of reading on the net, I know it can be done with TrueNAS but I am not sure how this would be done...
  4. animBacker857

    Picking HDDs and Compatibility Advice

    Hello again. Been loving this forum and am learning a lot. I'm nearing my first NAS purchase, a Synology 1821+, and am checking Amazon for drives to get it with (have good experience with them and am unsure of other UK retailers like Scan and Box). The plan was to perhaps get 2 8TB drives to...
  5. P

    Storage pools/volumes and RAID type

    Hi, fairly new to the world of Synology NAS. I am about to take delivery of a DS920+ with 4 times 4TB. My question is about the storage pools/storage volumes. I would like to pair the hard drives as follow: one pair for business and one pair for personal stuff (for each pair there is the main...
  6. M

    New 576TB NAS, pool & RAID planning (SA3600 + 2 exp)

    Hi, This isn't my first NAS rodeo, but first time we're giving Synology a serious chance at our company. The hardware arrives in a few days, and I want to plan the volume makeup ahead of time. SA3600 (128GB RAM) + 2 x RS1222sas expansion chassis, full with 36 x 16TB Toshiba enterprise drives...
  7. RoCaRay

    Selecting a RAID Level - Wikipedia Resource

    In addition to Synology's documentation, there are three Wikipedia articles that might be helpful to some of our members who are in the process of selecting a RAID level that will best meet their requirements. These articles include many references and external links for those wanting a deeper...
  8. I

    Add extra storage to volume

    Hello, I am new to a NAS Synology DS220+ and I can't figure something out. At first I had one Seagate 4TB HDD, but I want to expand my storage with another 4TB (8TB total). (The backup is done on another external HDD, which means I don't need to replicate the data.) I have bought another...
  9. B

    DSM 7.0 ds920+ hotswap, change raid, bigger drives and some questions in general

    Hi guys, got currently raid1 2x1tb drives (black and blue wd, old one) and just bought 4x4tb wd red plus. Now i wonder how i should make changes. End concept is 4x4tb raid5 or 6 maybe. How to start? I am not sure if i can do this: 1. Use 2 new 4tb drives, on one of them copy existing data from...
  10. G

    DSM 7.0 Not seeing an increase in volume after replacing smaller drives with larger drives in an SHR raid

    I have 4 disks in an SHR 1 array on a system using DSM 7. This is my first NAS so I did not upgrade from an older version of DSM. I started with 2x6TB and 2x16 TB disks The storage pool showed I have 25.5 capacity. I replaced one of the 6TB drives with a 12TB drive and the storage pool still...
  11. _vic_

    DS1821+ and two types of RAID on the 8 HDD

    Hello, I have a question on the new DS1821+: is it possible to configure the first 2 HDD with a RAID1 and the last 6 HDD with a RAID6? At the moment I am using a DS713+ with 2x 6TB in RAID1 and a DX513 with 5x 3TB in RAID6. I'd like to keep some data on a mirrored system for a quick and simple...
  12. A

    2x3TB Raid 0 Setup

    I have 2 x 3TB raid 0 from my previous WD Duo Book. The WD Duo Book is damaged and i bought a DS1621xs+ intend to replace it. How can i setup so can read from my previous 3tb raid HDDs without losing the data? Thank you
  13. J

    DSM 6.2 Expanding storage space and changing RAID type

    Hello. I'm trying to do two things - replace half of my old, small drives with new, larger drives, and change my RAID type from RAID 6 to SHR. My NAS is an 1817+ running DSM 6.2.4. It has eight bays, all full of 4TB drives, in one storage pool, in a RAID 6 array. I have four new 8TB drives...
  14. D

    DS920+ Raid Expansion Help

    Good afternoon all, First-ever post here so please be gentle. I currently own a Synology DS920+ (DSM 7.0-41890) which is for personal use, it was running 2x 3TB WD RED drives however due to storage running a little low I decided to buy a further 2x 3TB Seagate IronWolf drives to expand my...
  15. K

    DSM 6.2 Going from JBOD to RAID - Can I keep all my settings, packages, and docker containers?

    I initially set my NAS up with JBOD. I now realize the stupidity of this and so want to change to a raid (or SHR) setup. Migrating the data is not an issue as I have several other disks that I can use temporarily. However, I've put in a lot of time setting up various docker containers. I would...
  16. Phone Guy

    SMR drive as single drive not RAID

    I've got a server (not a "nas") that has some age on the internal drives. This "server" is a windows computer that is on 24/7 and pretty much runs the media duties of the house. It's drives all have age on them, and I'm in upgrade mode ;) Any reason why a WD SMR (EFAX) drive(s) can NOT be...
  17. T

    New discs and RAID plan

    Help? I have a DS418play that has 4x6GB discs in RAID 10, and is too full at 96%. I want more space, and have sourced 4 x 10GB discs. I am slightly less anxious than when I first set this up, so am thinking of converting to SHR ... but can't do that simply. So ... I could.... - stay with RAID 10...
  18. I

    RAID 5, 6, or 10 - I can't decide... help?

    New 1621+ just arrived and I loaded it up with 4x6TB Exos drives... I'm going to be using BTRFS but not sure about the array type... RAID 5, 6, or 10 is what I"m trying to decide. I don't believe I need SHR - I'm thinking about upgradability in the future (some models don't support SHR). Since...
  19. Crabber

    HD and raid type for 920+

    Upgrading my 220J with 1 WD Red 12TB to a 920+ Plan is to buy 3 WD 4tb Red Plus and build a SHR-1 or RAID5 array, this would be for 2 users documents, photos, videos and movies (about 6tb) After migrating data to the 920+ install the 12TB and use for Surveillance having no more than 6 cameras...
  20. S

    DS1621xs+ backup to another RAID device

    I want to have an offsite backup of my DS1621xs+. It's connected to an iMac Pro over 10GBe and 1GBe to the router. I will eventually get a second DS1621 offsite and use Hyperbackup / Hyperbackup Vault between them. But until then, my offsite backup solution is a 2-drive G-RAID Thunderbolt 3...