I’m not implying Raid 5 on its own is a complete backup.
Within a storage array though it does provide redundancy at that level, and generally speaking most people don’t access a raid or NAS at a shell level only where they drop rm -fr’s
Separate and offsite backups are non negotiable, however running a raid 5 locally can greatly reduce storage rebuild/restore time, if a single drive fails the rest of the raid continues to work fine until replaced.
ZFS snapshots can help, but this is one layer of a comprehensive backup strategy.
both drives? Only 2 mirrored drives isn't really what a RAID can be.
Constructing a RAID5 with 4 drives provides failover and recovery if one of the drives dies.
You can have as much redundancy as you like on your RAID, but if you fat finger an rm -r it's all gone.
A real backup protects both against hardware faults and accidental deletion.
I’m not implying Raid 5 on its own is a complete backup.
Within a storage array though it does provide redundancy at that level, and generally speaking most people don’t access a raid or NAS at a shell level only where they drop rm -fr’s
Separate and offsite backups are non negotiable, however running a raid 5 locally can greatly reduce storage rebuild/restore time, if a single drive fails the rest of the raid continues to work fine until replaced.