[PLUG] Re: USB Mass storage errors

Jim Karlock Jkarlock at earthlink.net
Tue Sep 14 04:19:02 PDT 2004

At 03:18 PM 9/13/2004 , you wrote:

>Russell Senior <seniorr at aracnet.com> writes:
> > I've got a 200 Gig IDE drive in an external enclosure, used as a
> > backup device.  I am getting occasional lockups during particularly
> > intense rsyncs, and just had my first on last night.
> > Afterwards, I began getting messages like:
> >
> >    scsi4: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 00 6a 
> 8a 00 00 04 00
> >    Current sdb: sense key Medium Error
> >    Additional sense: Unrecovered read error
> >    end_request: I/O error on device sdb1, logical block 27273
>This is a known error, and as we speak Elliott Mitchell is hunting through
>kernel and driver code for a solution.  Please help him achieve fame and
>fortune (and perhaps impress future employers) by sending him logs.  Also,
>please see which USB to IDE chipset is in the bridge in your external
>enclosure.  This may show up in /proc/bus/usb/devices , or in dmesg .
>Note that some of the older enclosures may be incapable of doing >137GB
>drives.  This is a separate issue, and perhaps not solvable with kernel
>code repairs, depending on the way the enclosure constructs ATA commands.
>This is a fairly critical problem to solve, because IDE hotswap is being
>left out of the 2.6 kernel, perhaps indefinitely, according to Alan Cox.
>USB2 or ethernet are the only hotswap alternatives for 2.6 I know of.
>In the interim, do NOT use a USB drive for backups.

I have 3-4 different USB drive enclosures that I can make available, if 
that would help the effort. All support drives > 137 G.

Is this only a USB problem, or also firewire?

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