Matt Harrison wrote:
> Hi everyone,
>
> I've been running a zfs fileserver for about a month now (on snv_91) and 
> it's all working really well. I'm scrubbing once a week and nothing has 
> come up as a problem yet.
>
> I'm a little worried as I've just noticed these messages in 
> /var/adm/message and I don't know if they're bad or just informational:
>
> Aug  2 14:46:06 exodus  Error for Command: read_defect_data        Error 
> Level: Informational
>   

key here: "Informational"

> Aug  2 14:46:06 exodus scsi: [ID 107833 kern.notice]    Requested Block: 
> 0                         Error Block: 0
> Aug  2 14:46:06 exodus scsi: [ID 107833 kern.notice]    Vendor: ATA 
>                             Serial Number:
> Aug  2 14:46:06 exodus scsi: [ID 107833 kern.notice]    Sense Key: 
> Illegal_Request
> Aug  2 14:46:06 exodus scsi: [ID 107833 kern.notice]    ASC: 0x20 
> (invalid command operation code), ASCQ: 0x0, FRU: 0x0
>   

Key here: "ASC 0x20 (invalid command operation code)"

> Aug  2 14:46:06 exodus scsi: [ID 107833 kern.warning] WARNING: 
> /[EMAIL PROTECTED],0/pci1043,[EMAIL PROTECTED]/[EMAIL PROTECTED],0 (sd0):
> Aug  2 14:46:06 exodus  Error for Command: log_sense               Error 
> Level: Informational
> Aug  2 14:46:06 exodus scsi: [ID 107833 kern.notice]    Requested Block: 
> 0                         Error Block: 0
> Aug  2 14:46:06 exodus scsi: [ID 107833 kern.notice]    Vendor: ATA 
>                             Serial Number:
> Aug  2 14:46:06 exodus scsi: [ID 107833 kern.notice]    Sense Key: 
> Illegal_Request
> Aug  2 14:46:06 exodus scsi: [ID 107833 kern.notice]    ASC: 0x24 
> (invalid field in cdb), ASCQ: 0x0, FRU: 0x0
>   

Key here: "invalid field in cbd" where CDB is command data block
http://en.wikipedia.org/wiki/SCSI_CDB

Obviously a command is being sent to the device that it doesn't
understand.  This could be a host side driver or disk firmware problem.
I'd classify this as annoying, but doesn't appear dangerous on the face.
With some digging you could determine which command is failing,
but that won't fix anything.  You might check with the disk vendor
for firmware upgrades and you might look at a later version of the
OS drivers.

This isn't a ZFS issue, so you might have better luck on the storage-discuss
forum.
 -- richard

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