On Thu, 2 Sep 2004, Joel Campbell wrote:

> Hi,
> I would like to submit this bug report. I have filed a bug with
> gentoo's bugzilla and was told to report the bug to this address as
> well. The link to the gentoo bug report is:
> http://bugs.gentoo.org/show_bug.cgi?id=61101
> 
> Basically my external USB Hard Drive stops responding after a
> (usually) short amount of time. Here are some hopefully relevant
> things:
> 
> Kernel version: 2.6.8.1
> 
> [Drive Detection]
> Sep  2 21:53:06 coltrane usb 1-3: new high speed USB device using address 3
> Sep  2 21:53:06 coltrane usb-storage: USB Mass Storage device detected
> Sep  2 21:53:06 coltrane usb-storage: altsetting is 0, id_index is 53
> Sep  2 21:53:06 coltrane usb-storage: -- associate_dev
> Sep  2 21:53:06 coltrane usb-storage: Vendor: Genesys Logic
> Sep  2 21:53:06 coltrane usb-storage: Product: USB to IDE Disk

> Sep  2 21:56:01 coltrane usb-storage: Command WRITE_10 (10 bytes)
> Sep  2 21:56:01 coltrane usb-storage:  2a 00 08 9c c5 f7 00 00 80 00
> Sep  2 21:56:01 coltrane usb-storage: Bulk Command S 0x43425355 T
> 0x2511 L 65536 F 0 Trg 0 LUN 0 CL 10

Aha!  A Genesys Logic device, and an attempted 65536-byte transfer.

These devices have been problematic for a long time.  A workaround, based 
on information from Genesys Logic technical support has been included in 
recent versions of the kernel, but I'm not sure in which version it first 
appears.  Evidently it's not in the version you're using, because part of 
the workaround is to limit transfers to 32768 bytes.

You can try upgrading your kernel, or you can try applying this patch:

http://marc.theaimsgroup.com/?l=linux-usb-devel&m=108938736229333&q=raw

Alan Stern




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