Re: File-backed VMs under RAIDframe RAID-1

[Dustin Marquess <dmarquess%gmail.com@localhost>]

Gotcha.  I guess it makes sense.  So in other words, it's a given
until ZFS in all its glory is finally stable? :)

-Dustin

On Tue, Mar 2, 2010 at 12:46 PM, Thor Lancelot Simon <tls%panix.com@localhost> 
wrote:
> On Tue, Mar 02, 2010 at 11:27:30AM -0600, Dustin Marquess wrote:
>> All,
>>
>> I have a question regarding using RAIDframe RAID-1 & Xen.
>>
>> Months ago on one setup a Linux VM that was P2V'd from a vendor
>> install (CentOS) got completely corrupt.  I scratched it off as a
>> vendor problem.
>>
>> Today my Oracle DBA was complaining that Oracle died with 600 errors.
>> I logged on to the Xen dom0 and noticed that RAIDframe had kicked a
>> drive out:
>>
>> Feb 24 03:37:23 fxnpvm02 /netbsd: wd0a: error reading fsbn 394348511
>> of 394348511-394348607 (wd0 bn 394348574; cn 391218 tn 13 sn 11),
>> retrying
>> Feb 24 03:37:23 fxnpvm02 /netbsd: wd0: (uncorrectable data error)
>
> On a read error, RAIDframe *should* be returning you the data from the
> other member of the RAID set, for a RAID-1 set.  But if there's any chance
> the drive returned zeroes or bad data before it started actually returning
> error... ugh.
>
> Thor
>