Tyler J. Wagner wrote:
> Raid5: Lose power during write operation = silent data corruption, which
> you'll find out about next time you try to rebuild.
depends on your disk array. good hardware raid has a battery-backed
write cache which will prevent such issues. As long as the power comes
back before your battery dies.
Les Mikesell wrote:
> The real problem is that there are parts of the disk that haven't been
> accessed for a while and the errors already exist on multiple drives
> before you notice them. For software raid, I thought a cron job was
> supposed to be testing them periodically, but the notification may not
> reach you - and hardware raid may not to the tests.
Depends on your software RAID. When I last checked, solaris did not
automatically check your zfs raids. FreeBSD 8.0 doesn't.
various folks said:
> RAID10 performs better than RAID6. Or vice versa.
depends on your use case.
broadly speaking, if you are doing large reads and writes, or doing
mostly reads, raid5/6 will be faster. for random i/o raid10 will be
faster.
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