On Tue, 16 Dec 2003, Cornelius Claussen wrote:
> >It may be that slowing down the transfer rate will help prevent those I/O
> >errors; that's worked for some people in the past.
>
>
> How can I do that?
On Wed, 17 Dec 2003, David Brownell wrote:
> Those changes to make SCSI use smaller I/O requests would
> seem to be the most effective tool we now have for slowing
> down traffic to USB disks.
Cornelius:
Try this. I haven't got a patch for you, but you can easily make the
change by hand.
In the kernel source file drivers/usb/storage/scsiglue.c, somewhere around
lines 315 to 330, you'll see a couple of lines that say:
/* limit the total size of a transfer to 120 KB */
.max_sectors = 240,
Change the 120 in the comment to 64 and change the 240 to 128.
That will certainly make a difference. Whether it will help prevent your
I/O errors is harder to predict.
Alan Stern
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