Re: [opensuse] bigger disks, bigger risks?

Sandy Drobic wrote:

Per Jessen wrote:
It's a slightly different topic, but running complete backups are far
from always practical. The enormous amounts of disk-space and 24/7
production requirements make it virtually impossible to run complete
backups. Backups are a last resort for when disaster strikes.

On my new server (2.7 TB RAID) I use LVM snapshots and rsnapshot on
another disk as backup. Very fast and reliable.

Interesting, I may have to look into that. We currently run two storage
arrays back-to-back, but that's only realistic as long as we're still
on a SAN.

So, it is no longer theoretical; you need RAID both on the primary
AND backup hardware devices. That gives you the best fault
tolerance, both human and hardware.

What do you do about the risk of a dual-drive failure? RAID6 is one
possible answer, but AFAIK it requires at least 5 disks, which is too
many (for my situation).

At least 4 disks are required for RAID6.

Also very interesting - I'll have to look at that in detail. I really
thought 5 disks was the minimum.



--
/Per Jessen, Zürich

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