graid often resyncs raid1 array after clean reboot/shutdown

[Alexander Motin]

Hi.

On 29.10.2012 06:55, Lawrence Stewart wrote:
> I have a fairly new HP Compaq 8200 Elite desktop PC with 2 x 1TB Seagate
> ST1000DM003 HDDs in raid1 using the on-board Intel Matrix RAID
> controller. The system is configured to boot from ZFS off the raid1
> array, and I use it as a KDE GUI (with on-cpu GPU + KMS) desktop.
>
> Everything works great, except that after a "shutdown -r now" of the
> system, graid almost always (I believe I've noted a few times where
> everything comes up fine) detects one of the disks in the array as stale
> and does a full resync of the array over the course of a few hours.
> Here's an example of what I see when starting up:

 From log messages it indeed looks like result of unclean shutdown. I've 
never seen such problem with UFS, but I never tested graid with ZFS. I 
guess there may be some difference in shutdown process that makes RAID 
metadata to have dirty flag on reboot. I'll try to reproduce it now.

-- 
Alexander Motin