ad0: READ command timeout....

[Dan Langille]

On 19 May 2003 at 8:42, Tenebrae wrote:

> On Sun, 18 May 2003, Dan Langille wrote:
> 
> > This morning I found a frozen box.  On the console was this:
> >
> > ad0: READ command timeout tag=0 serv=0 - resetting
> > ata0: resetting devices .. ata0-slave: ATA identify retries exceeded
> > done
> >
> > After reboot, those messages were found in /var/log/messages.
> >
> > I'm running FreeBSD 4.8-RC from Apr 4 10:45:49 EST 2003.
> >
> > Any ideas?
> 
> Hey dvl,
> I've had similar problems.  This has come up a few times on the mailing
> list in the past, especially regarding certain lines of IBM drives.

ad0: 516MB <QUANTUM MAVERICK 540A> [1049/16/63] at ata0-master PIO3
For what it's worth, it's been in there since the box was put 
together in November 2000 and this is the first indication of a 
problem.  It's probably getting old.

> Suggestions include replacing your IDE cable, making sure it's not longer
> than 18 inches...and replacing the drive as it's probably on its last leg.
> Back it up while you can.

Luckily, it's not really an important drive (from a data point of 
view) in this system:

$ df | grep ad0
/dev/ad0s1a     99183    50162   41087    55%    /
/dev/ad0s1e    413695        1  380599     0%    /slow

I'll get a new drive in there ASAP.  I'm glad it's not the SCSI 
drives which are failing:

$ df
Filesystem  1K-blocks     Used   Avail Capacity  Mounted on
/dev/ad0s1a     99183    50162   41087    55%    /
/dev/da1s1f  17130052 15553651  205997    99%    /home
/dev/ad0s1e    413695        1  380599     0%    /slow
/dev/da0s1e  17130052 10675758 5083890    68%    /usr
/dev/da1s1e    254063   156203   77535    67%    /var
procfs              4        4       0   100%    /pro
-- 
Dan Langille : http://www.langille.org/