ATA Host Bus Errors

[Ed Greshko]

Dave Brown wrote:
> I'm not about to list the dozens of posts and URLs which I've looked at
> in regards to this problem... I probably couldn't even remember them
> even if I tried. Cables have been checked and re-plugged in but I
> haven't changed them as the error occurs only on ATA2 and drives sdc and
> sdd run off different cables. I find it unlikely that the sda and sdb
> cables are ok but sdc and sdd are bad.

Right, you really have SATA drives and not PATA.

You've checked the cables, and replugged the cables.  But, have you swapped
the cables between drives?

Troubleshooting 101 says, make incremental changes (writing down what you've
done) to see if the problem moves.  Once you get the problem to move you
will find the bad item.

Like I said earlier....

If the problem always happens on ata2.00 then the problem is either port 0
on that SATA controller, the cable connecting the port to sdc, or the drive
itself.

The only way to narrow down the failing component is to make a change that
causes the failure to move.


> 
> I just wish this box wasn't a whitebox that I have to run around
> troubleshooting myself rather than an IBM or HP which either just works
> or you ring IBM/HP and say it's broken - fix it.
> 
> -----Original Message-----
> From: fedora-list-bounces at redhat.com
> [mailto:fedora-list-bounces at redhat.com] On Behalf Of Ed Greshko
> Sent: Friday, 20 April 2007 4:36 PM
> To: For users of Fedora
> Subject: Re: ATA Host Bus Errors
> 
> Dave Brown wrote:
>> Hey All,
>>  
>> Having an interesting problem with a FC6 server regarding host bus 
>> errors - every now and again in the messages log there are the
> following:
>>  
>> Apr 20 04:58:05 lftvm01 kernel: ata2.00: exception Emask 0x0 SAct 0x0 
>> SErr 0x0 action 0x0 Apr 20 04:58:05 lftvm01 kernel: ata2.00: (BMDMA 
>> stat 0x6) Apr 20 04:58:05 lftvm01 kernel: ata2.00: cmd 
>> 25/00:f8:d7:ef:61/00:00:1c:00:00/e0 tag 0 cdb 0x0 data 126976 in
>> Apr 20 04:58:05 lftvm01 kernel:          res
>> 51/84:a7:28:f0:61/84:00:1c:00:00/e0 Emask 0x20 (host bus error) Apr 20
> 
>> 04:58:05 lftvm01 kernel: ata2.00: configured for UDMA/133 Apr 20 
>> 04:58:05 lftvm01 kernel: ata2.01: configured for UDMA/133 Apr 20 
>> 04:58:05 lftvm01 kernel: ata2: EH complete Apr 20 04:58:05 lftvm01 
>> kernel: SCSI device sdc: 625142448 512-byte hdwr sectors (320073 MB) 
>> Apr 20 04:58:05 lftvm01 kernel: sdc: Write Protect is off Apr 20 
>> 04:58:05 lftvm01 kernel: SCSI device sdc: write cache: enabled, read 
>> cache: enabled, doesn't support DPO or FUA Apr 20 04:58:05 lftvm01 
>> kernel: SCSI device sdd: 625142448 512-byte hdwr sectors (320073 MB) 
>> Apr 20 04:58:05 lftvm01 kernel: sdd: Write Protect is off Apr 20 
>> 04:58:05 lftvm01 kernel: SCSI device sdd: write cache: enabled, read 
>> cache: enabled, doesn't support DPO or FUA
>>  
>> and then every now and again
>> Apr 20 04:54:32 lftvm01 kernel: ata2.00: exception Emask 0x0 SAct 0x0 
>> SErr 0x0 action 0x2 frozen Apr 20 04:54:32 lftvm01 kernel: ata2.00: 
>> cmd 25/00:08:ff:3d:8c/00:01:1d:00:00/e0 tag 0 cdb 0x0 data 135168 in
>> Apr 20 04:54:32 lftvm01 kernel:          res
>> 40/00:c7:d0:61:84/84:00:1d:00:00/e0 Emask 0x4 (timeout) Apr 20 
>> 04:54:39 lftvm01 kernel: ata2: port is slow to respond, please be 
>> patient (Status 0xd0) Apr 20 04:55:02 lftvm01 kernel: ata2: port 
>> failed to respond (30 secs, Status 0xd0) Apr 20 04:55:02 lftvm01 
>> kernel: ata2: soft resetting port Apr 20 04:55:02 lftvm01 kernel: 
>> ata2.00: configured for UDMA/133 Apr 20 04:55:02 lftvm01 kernel: 
>> ata2.01: configured for UDMA/133 Apr 20 04:55:02 lftvm01 kernel: ata2:
> 
>> EH complete Doesn't always cause a crash but looks like sometimes it 
>> might. Have had a look around at various places and haven't found a 
>> definitive cause let alone an answer.
>>  
>> If anyone has any ideas or theories please throw em out there. 
>> Curiously these errors only occur on ata2, we have 2 drives sitting on
> 
>> ata1 without an issue. ata1 drives are the "os" and ata2 drives are
> the "data"
>>  
>> Some more detail about the machine / OS.
>> Kernel:            2.6.20-1.2933.fc6PAE
>> Drives:            4x WD 320Gb SATA Drives
>> ATA Module:    ata_piix
>> CPU:              Dual-Core Intel Xeon 3.0Ghz
>> Mem:             6Gb
>> Not exactly sure what the motherboard is - it's a "whitebox" server 
>> not
>> Tier1 (IBM,HP,Dell)
> 
> You said, "Have had a look around at various places..." but you didn't
> say what you looked at.  Is it always ata2.00 that presents the problem?
> Have you swapped cables around?
> 
> It is a good idea to tell folks what you done so when they respond you
> don't have to say..."tried that and it wasn't it".  :-)
> 
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