>>>>> On Thu, 14 Apr 2011 14:56:56 -0400, Mike Hobbs said:
> 
>   When backing up to a disk/RAID system, how do you guys mirror your 
> raid array?  If you were to mirror in real-time and something got 
> corrupted it could cause problems on your mirror.  Do you mirror once a 
> day?  What software do you use to mirror your array?  is rsync good enough?

What do you mean by corrupted and cause problems?  A disk error or something
in software?

RAID arrays are designed to cope gracefully with disk errors.  File systems
using checksums with built-in RAID capabilities such as zfs can make that
process more robust.

If you are worried about software bugs (in the filesystem implementation or
Bacula), then I think you need to make separate backups and test them
regularly, because any kind of automatic synchronization of the mirror will
just silently propagate the corruption to all copies.

__Martin

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