Question about the choice of file type

    • OMV 4.x

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    • Question about the choice of file type

      Hello,
      I come to you hoping to find the solution most suited to my needs.


      I have an HP DL380e server with 2xE5-2450L and 32 GB of ECC ram.I was thinking of going on a RAID5 mount in ext4.
      Following the advice of @cabrio_leo on other topics, I thought I was moving towards the ZFS format (32GB of ram that seems to be well suited), I was seduced by the possibilities and security that offers this format.


      Currently testing the possibilities of different formats and following the creation of a RAIDZ-1, I realized that it was not possible to enlarge a RAIDZ-1que by adding to the initial pool another RAIDZ-1 (so 3 disks minimum then again 3 discs etc ...).


      I want a solution that is at least as reliable as RAID5 and with the ability to add volumes without having to add them by 3 disks like ZFS.

      Is there currently a format compatible with OMV in the same genre as ZFS, but without the constraint of adding the disks by 3 as in the case of RAIDZ1?

      thank you in advance
    • ducksama wrote:

      I realized that it was not possible to enlarge a RAIDZ-1que by adding to the initial pool another RAIDZ-1 (so 3 disks minimum then again 3 discs etc ...).
      You can expand the pool not only by another RAIDZ-1 (in your case), but with any kind of ZFS volume.

      ducksama wrote:

      Is there currently a format compatible with OMV in the same genre as ZFS, but without the constraint of adding the disks by 3 as in the case of RAIDZ1?
      SnapRaid
      OMV 3.0.99 (Gray style)
      ASRock Rack C2550D4I C0-stepping - 16GB ECC - 6x WD RED 3TB (ZFS 2x3 Striped RaidZ1)- Fractal Design Node 304
    • cabrio_leo wrote:

      ducksama wrote:

      I realized that it was not possible to enlarge a RAIDZ-1que by adding to the initial pool another RAIDZ-1 (so 3 disks minimum then again 3 discs etc ...).
      You can expand the pool not only by another RAIDZ-1 (in your case), but with any kind of ZFS volume.

      ducksama wrote:

      Is there currently a format compatible with OMV in the same genre as ZFS, but without the constraint of adding the disks by 3 as in the case of RAIDZ1?
      SnapRaid

      My ultimate goal is to have 2 pools of 6-7 disks (in RAIDZ1 ideally). If I add a disk in another format than RAIDZ1, as a basic disk or a mirror, yes, it will be present, but not in RAIDZ1, is that it?
      If my request above is correct, you must at least add at least 3 disks for RAIDZ1.

      Regarding SnapRaid I will look at this thank you.

      Edit: Following the reading on the forum topic about snapraid and a very good comparative table, I think indeed that snapraid is the most flexible for the use I want to make. I was going to explore in this way. thanks again @cabrio_leo

      The post was edited 1 time, last by ducksama: complementary answer ().

    • ducksama wrote:

      If I add a disk in another format than RAIDZ1, as a basic disk or a mirror, yes, it will be present, but not in RAIDZ1, is that it?
      Yes. Then you have a pool consisting out of a RAIDZ1 and a mirror for example. ZFS volumes out of a single disk should be avoided because there is no data redundancy (It can be configured to have several copies of a file on a basic disk - but this is another story). E.g. if you add this kind of volume to a pool and this one-disk-volume fails you loose the complete pool.

      ducksama wrote:

      Regarding SnapRaid I will look at this thank you.
      SnapRaid is often used together with MergerFS.
      OMV 3.0.99 (Gray style)
      ASRock Rack C2550D4I C0-stepping - 16GB ECC - 6x WD RED 3TB (ZFS 2x3 Striped RaidZ1)- Fractal Design Node 304