Friday, January 6, 2006, 11:16:31 AM, you wrote:
> On Fri, 6 Jan 2006 at 9:39am, Bryan J. Smith wrote
>> Had you used the 3Ware's intelligent hardware RAID, it would
>> have hidden the drive disconnect from the system. You'd see
>> a log entry on the failure, and that the array was in a
>> "downgraded" state.
>>
>> Instead, you're using software RAID, and it's up to the
>> kernel to not panic on itself because a disk is no longer
>> available. The problem isn't the 3Ware controller, it's the
>> software RAID logic in the kernel.
> Yes, I'm aware of all that. I've been using 3wares for *years* (as
> giggle would easily have revealed). But, as the archives of this list
> will attest to, using these boards in hardware RAID mode in centos 4 is
> bad news. Performance sucks. There's some sort of nasty interaction
> between the 3wares and ext3 which makes the combo unusable, really. And
> we all know the upstream provider's stance on XFS.
I have a number of machines running 3ware cards on CentOS 3/4 and I
haven't had any trouble with them in HW RAID.
>>> Having the system hang every time a disk dies is, well, less
>>> than optimal.
>>
>> No joke. It wasn't until even kernel 2.6 that hotplug
>> support was offered, and it still does _not_ work as
>> advertised.
> Hotplug worked just fine on this system when I tested (multiple times) via
> 'mdadm -f -r' and 'mdadm -a'. It's the actual disk failure handling
> that's at fault here.
