Read / write timeouts on SATA disks connected to ICH9

[Adam Vande More]

On Fri, May 14, 2010 at 12:42 PM, Pieter de Boer <pieter at os3.nl> wrote:

> I'm running FreeBSD 8.0-RELEASE-p1 on a Dell R300 which has a ICH9 SATA
> controller on-board (do not have the RAID controller).
>
> The system has 2 disks in a gmirror setup. Every now and then, probably
> under some load, one of the disks gets read or write timeouts like:
> May  5 03:01:37 aberdeen kernel: ad4: timeout waiting to issue command
> May  5 03:01:37 aberdeen kernel: ad4: error issuing WRITE_DMA48 command
> May  5 03:01:37 aberdeen kernel: GEOM_MIRROR: Request failed (error=5).
> ad4[WRITE(offset=200404975104, length=16384)]
> May  5 03:01:37 aberdeen kernel: GEOM_MIRROR: Device gm0: provider ad4
> disconnected.
>

Have you tried replacing/checking the cables?  Does it always happen to ad4?
 Your drive could be dying, try swapping it out and see if the errors
persist.

-- 
Adam Vande More