Comment on How bad of an idea is it to use computing HDDs in a DIY NAS?
eleitl@lemmy.zip 1 week ago
Use zfs. Use RAID-suitable (TLER) drives which limit retries before reporting failure. Use stripe over mirror pools (RAID10 equivalent). Buy a spare in advance. Hot spares are immediately starting rebuilding after failure. Scrub regularly (crontab). Always remember: RAID is not a backup.
theorangeninja@sopuli.xyz 1 week ago
I think there are too many technical words I don’t understand yet in this comment, but thanks nonetheless. One I want to ask specifically tough, is a hot spare a disk mirrored every now and then or what do you mean by that?
eleitl@lemmy.zip 1 week ago
I can explain in more detail later.
A hot spare is a spinning disk that is known to the system and is automatically added to a RAID/pool when a disk there fails, and then triggers rebuild/resilvering if the RAID.
A cold spare is a disk added manually by the user.
theorangeninja@sopuli.xyz 1 week ago
So if you can use a hot spare is mainly depentend on the OS you use I suppose?
eleitl@lemmy.zip 1 week ago
Hardware RAID host adapters can handle hot spares OS-agnostically, but for zfs these days it means Linux or *BSD. For a NAS I would go with a BSD distro, for hyperconverged Proxmox on top of Debian.
fhein@lemmy.world 6 days ago
You mean “spinning disk” metaphorically, right? Or is there any reason to not have it in low power standby mode? I don’t have any hot spare in my server, but on my desktop I use hdparm to spin down a rarely used storage drive just because it’s so loud.
eleitl@lemmy.zip 6 days ago
Yes, just powered so the system is aware of it.