I have quite an extensive collection of media that my server makes available through different means (Jellyfin, NFS, mostly). One of my harddrives has some concerning smart values so I want to replace it. What are good harddrives to buy today? Are there any important tech specs to look out for? In the past I didn’t give this too much attention and it didn’t bite me, yet. But if I’m gonna buy a new drive now, I might as well…

I’m looking for something from 4TB upwards. I think I remember that drives with very high capacity are more likely to fail sooner - is that correct? How about different brands - do any have particularly good or bad reputation?

Thanks for any hints!

  • Avid Amoeba@lemmy.caEnglish
    39·
    1 day ago

    Buy recertified enterprise grade disks from https://serverpartdeals.com. Prices were around $160/16TB the last time I checked. Mix brands and models to reduce simultaneous failure. Use more than 1-disk redundancy. If you can’t buy from SPD, either find an alternative or buy external drives and shuck them. Use ZFS to know if your data is correct. I’ve been dealing with funny AMD USB controllers recently and the amount of silent data corruption I’d have gotten if not for ZFS is ridiculous.

    • Pacmanlives@lemmy.worldEnglish
      3·
      6 hours ago

      Holy cow these are way cheaper than anything I have seen before. I am in a RAID 5 setup so if a disk or two dies I am okay.

      • Avid Amoeba@lemmy.caEnglish
        1·
        6 hours ago

        If you can, move to a RAID-equivalent setup with ZFS (preferred in my opinion) in order to also know about and fix silent data corruption. RAIDz1, RAIDz2 would do the equivalent to RAID5, RAID6. That should eliminate one more variable with cheap drives.

        • Pacmanlives@lemmy.worldEnglish
          5·
          5 hours ago

          ZFS is a no go for me due to not being able to add larger disk and then expand my pool size on the fly. MDADM and LVM+XFS have treated me well the past few years. I started with an 12tb pool and now over 50 tb pool

          • Avid Amoeba@lemmy.caEnglish
            1·
            2 hours ago

            Not that I want to push ZFS or anything, mdraid/LVM/XFS is a fine setup, but for informational purposes - ZFS can absolutely expand onto larger disks. I wasn’t aware of this until recently. If all the disks of an existing pool get replaced with larger disks, the pool can expand onto the newly available space. E.g. a RAIDz1 with 4x 4T disks will have usable space of 12T. Replace all disks with 8T disks (one after another so that it can be done on the fly) and your pool will have 24T of space. Replace those with 16T and you get 48T, and so on. In addition you can expand a pool by adding another redundant topology just like you can with LVM and mdraid. E.g. 4x 4T RAIDz1 + 3x 8T RAIDz2 + 2x 16T mirror for a total of 44T. Finally, expanding existing RAIDz with additional disks has recently landed too.

            And now for pushing ZFS - I was doing file based replication on a large dataset for many years. Just going over all the hundreds of thousands of dirs and files took over an hour on my setup. That’s then followed by a diff transfer. Think rsync or Syncthing. That’s how I did it on my old mdraid/LVM/Ext4 setup, and that’s how I continued doing on my newer ZFS setup. Recently I tried using ZFS send/receive which operates within the filesystem. It completely eliminated the dataset file walk and stat phase since the filesystem already knows all of the metadata. The replication was reduced to just the diff file transfer time. What used to take over an hour got reduced to seconds or minutes, depending on the size of the changed data. I can now do multiple replications per hour without significant load on the system. Previously it was only feasible overnight because the system would be robbed of IOPS for over an hour.

    • pedroapero@lemmy.mlEnglish
      6·
      14 hours ago

      I use BTRFS for the same. Being able to check for and repair silent corruptions is a must (and this is without needing to read the whole drives, only the actual files). I’ve had a lot of them over the years, including (but not only) because of a cheap USB controller also.

    • Loulou@lemmy.mindoki.comEnglish
      15·
      1 day ago

      This is incredible!

      American sites like this so rarely ship to France, or it costs a litteral fortune just in shipping, here it’s 130€ for a 12TB shipping included!

      Wow.

      I Do Not Need A 12TB Hard drive.

      I Do Not Need a 12 TB Hard drive!

      I mean or do I?

      Thanks 💖

        • TheHolm@aussie.zoneEnglish
          51·
          20 hours ago

          I would not trust these kind of dives in the mirror. IMHO RAID6 is the only way.

          • Avid Amoeba@lemmy.caEnglish
            2·
            18 hours ago

            Due to risk of failure or risk of data corruption because the mirror can’t tell which drive is right when there’s a difference?

            • turmacar@lemmy.worldEnglish
              2·
              6 hours ago

              The second one.

              Mirroring is good for speed, but a storage mechanism with parity checks will always be more recoverable. And you will have far more storage available.

              • Avid Amoeba@lemmy.caEnglish
                1·
                3 hours ago

                I think data checksums allow ZFS to tell which disk has the correct data when there’s a mismatch in a mirror, eliminating the need for 3-way mirror to deal with bit flips and such. A traditional mirror like mdraid would need 3 disks to do this.