Hi Przemol,
I think Casper had a good point bringing up the data integrity
features when using ZFS for RAID. Big companies do a lot of things
"just because that's the certified way" that end up biting them in the
rear. Trusting your SAN arrays is one of them. That all being said,
the need to do migrations is a very valid concern.
Best Regards,
Jason
On 2/22/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
On Wed, Feb 21, 2007 at 04:43:34PM +0100, [EMAIL PROTECTED] wrote:
>
> >I cannot let you say that.
> >Here in my company we are very interested in ZFS, but we do not care
> >about the RAID/mirror features, because we already have a SAN with
> >RAID-5 disks, and dual fabric connection to the hosts.
>
> But you understand that these underlying RAID mechanism give absolutely
> no guarantee about data integrity but only that some data was found were
> some (possibly other) data was written? (RAID5 never verifies the
> checkum is correct on reads; it only uses it to reconstruct data when
> reads fail)
But you understand that he perhaps knows that but so far nothing wrong
happened [*] and migration is still very important feature for him ?
[*] almost every big company has its data center with SAN and FC
connections with RAID-5 or RAID-10 in their storage arrays
and they are treated as reliable
przemol
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