Re: Help debugging DMA_READ errors

2008-09-16 Thread Jeremy Chadwick
On Tue, Sep 16, 2008 at 04:16:55PM -0700, Clint Olsen wrote: > On Sep 16, Jeremy Chadwick wrote: > > That's very strange then. Something definitely tried to utilise acd0 at > > that hour of the night. What is acd0 connected to, ATA-wise? Again, I > > assume it's PATA, but I'd like to know the pr

Re: Help debugging DMA_READ errors

2008-09-16 Thread Clint Olsen
On Sep 16, Jeremy Chadwick wrote: > That's very strange then. Something definitely tried to utilise acd0 at > that hour of the night. What is acd0 connected to, ATA-wise? Again, I > assume it's PATA, but I'd like to know the primary/secondary and > master/slave organisation, since you are using

Re: Help debugging DMA_READ errors

2008-09-16 Thread Clint Olsen
On Sep 16, Mike Tancsa wrote: > Would not bad cables (or trays) be consistent with symptoms like that ? > i.e. the OS sees errors, but when we ask the drive, it says, "what > errors". I am sure there are other things that could cause this, but in > the past I would start with the cables and or tra

Re: Help debugging DMA_READ errors

2008-09-16 Thread Jeremy Chadwick
On Tue, Sep 16, 2008 at 03:34:07PM -0400, Mike Tancsa wrote: > At 02:54 PM 9/16/2008, Jeremy Chadwick wrote: > >> However, there's no sign of DMA errors in the SMART log. I'm not sure >> what to make of that; I really would expect there to be some. > > Would not bad cables (or trays) be consistent

Re: Help debugging DMA_READ errors

2008-09-16 Thread Mike Tancsa
At 02:54 PM 9/16/2008, Jeremy Chadwick wrote: However, there's no sign of DMA errors in the SMART log. I'm not sure what to make of that; I really would expect there to be some. Would not bad cables (or trays) be consistent with symptoms like that ? i.e. the OS sees errors, but when we ask t

Re: Help debugging DMA_READ errors

2008-09-16 Thread Jeremy Chadwick
On Tue, Sep 16, 2008 at 11:19:03AM -0700, Clint Olsen wrote: > On Sep 16, Jeremy Chadwick wrote: > > acd0 is a CD/DVD drive. ad4 is a hard disk. What exactly were you > > doing with the system at the time these errors appeared? Were you using > > the CD/DVD drive? Was there a disc in the drive

Re: Help debugging DMA_READ errors

2008-09-16 Thread Wilko Bulte
Quoting Clint Olsen, who wrote on Tue, Sep 16, 2008 at 11:19:03AM -0700 .. > Hi Jeremy: > > Thanks for your detailed response. Here are the answers I have thus far: > > On Sep 16, Jeremy Chadwick wrote: > > acd0 is a CD/DVD drive. ad4 is a hard disk. What exactly were you > > doing with the sy

Re: Help debugging DMA_READ errors

2008-09-16 Thread Clint Olsen
Hi Jeremy: Thanks for your detailed response. Here are the answers I have thus far: On Sep 16, Jeremy Chadwick wrote: > acd0 is a CD/DVD drive. ad4 is a hard disk. What exactly were you > doing with the system at the time these errors appeared? Were you using > the CD/DVD drive? Was there a

Re: Help debugging DMA_READ errors

2008-09-16 Thread Jeremy Chadwick
On Tue, Sep 16, 2008 at 10:04:52AM -0700, Clint Olsen wrote: > Ok, I've had some flakiness with my 6.3-STABLE (Sun May 25 21:55:57 PDT > 2008) box. I assume that these errors are indicative of a system-level > problem rather than a single disk: Not necessarily, but FreeBSD makes debugging this ki

Help debugging DMA_READ errors

2008-09-16 Thread Clint Olsen
Ok, I've had some flakiness with my 6.3-STABLE (Sun May 25 21:55:57 PDT 2008) box. I assume that these errors are indicative of a system-level problem rather than a single disk: Event 1 --- Sep 14 05:12:54 belle kernel: ad0: TIMEOUT - READ_DMA retrying (1 retry left) LBA=216477719 Result: H