this post was submitted on 11 Dec 2025
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Please consider RAID6 or ensure your data is fully backed up. RAID5 falls flat if a drive fails during resilvering the array.
And, because a resilver involves significant load on the remaining drives, it's more likely than you think. If you have drives from the same batch, they likely have the same MTTF.
@RunningInRVA
Please don't label RAID a backup because it is not. RAID 1, 5 or 6 will give you a robust drive pool that is able to recover from a failed drive.
Backups should be done on a different medium and ideally off-site.
@Xaphanos
It's not an extra life, it's another health point. Red mushroom, not green mushroom.
@captain_aggravated It is a little cryptic.
Mario analogy. In Super Mario games, a green mushroom gives you an extra life, a chance to start over from a point in the past. A red mushroom makes Mario bigger, allowing him to survive some damage that would have killed him. Also in many games it makes him able to do things he can't when small. RAID arrays often run faster than individual disks would.
Well I wasn’t trying to, exactly. Just trying to convey that RAID5 is not considered reliable and that I was urging the commenter to ensure they have a backup if that’s what they are going to use. Regardless of how you configure your NAS, you can always lose data by mistake.
@RunningInRVA Apologies, I have clearly read your comment wrongly.