errors from external USB disk

[Matthias Apitz]

El día Thursday, February 27, 2014 a las 03:07:15PM +0100, Polytropon escribió:

> > While copying big files from the failing disk to another with 'cp -Rp'
> > I saw:
> > 
> > Feb 23 18:48:07 La-Habana kernel: (da0:umass-sim0:0:0:0): READ(10). CDB:
> > 28 00 01 cf d9 cf 00 00 0e 00 
> > Feb 23 18:48:07 La-Habana kernel: (da0:umass-sim0:0:0:0): CAM status:
> > CCB request completed with an error
> > Feb 23 18:48:07 La-Habana kernel: (da0:umass-sim0:0:0:0): Retrying command
> 
> So it's definitely a reading error here.

I was today reading the entire disk with

# dd if=/dev/da0 of=/dev/null bs=1m

and after around 700 GByte it terminated with:

dd: /dev/da0: Input/output error
712870+0 records in
712870+0 records out

in /var/log/messages I have:

Feb 27 18:01:48 La-Habana kernel: (da0:umass-sim0:0:0:0): READ(10). CDB:
28 00 57 05 33 80 00 00 80 00 
Feb 27 18:01:48 La-Habana kernel: (da0:umass-sim0:0:0:0): CAM status:
SCSI Status Error
Feb 27 18:01:48 La-Habana kernel: (da0:umass-sim0:0:0:0): SCSI status:
Check Condition
Feb 27 18:01:48 La-Habana kernel: (da0:umass-sim0:0:0:0): SCSI sense:
MEDIUM ERROR asc:11,0 (Unrecovered read error)
Feb 27 18:01:48 La-Habana kernel: (da0:umass-sim0:0:0:0): Error 5,
Unretryable error

Is there a way, to map away such bad block? Until today I was thinking
that the firmware does this by its own, transparently.

> > I dis this already, but it does not show much:
> > [...] 
> > Error Counter logging not supported
> > 
> > Device does not support Self Test logging
> 
> Sorry, I forgot to mention: SMART usually does not work over USB.
> Do you have the chance to attach the disk, probably a SATA drive,
> to a "native" SATA port and try again?

I have only laptops with USB external.

Thanks

	matthias

-- 
Matthias Apitz               |  /"\ ASCII Ribbon Campaign: www.asciiribbon.org
E-mail: guru at unixarea.de     |  \ / - No HTML/RTF in E-mail
WWW: http://www.unixarea.de/ |   X  - No proprietary attachments
phone: +49-170-4527211       |  / \ - Respect for open standards