Hello there,

On Wed, 17 Mar 2004, Rick Jones wrote:

> I think the problem here is a compatibility issue with this particular piece of
> hardware. I have a couple of these, they're EagleTec chipsets, ID 05e3/0702,
> rev 2. Mine are bare-bone IDE-to-USB adaptor plugs, but I assume the same chip
> has been used in pre-built enclosures.
>
> I get exactly the same result and error logs as has been discussed, and I'm
> running SME server 6.0, which is based on RH with kernel 2.4.20. It's usually
> volume reads that seem to fail eventually, writes are OK.
>
> I experimentally tried a 2.4.25 kernel, but it made no difference. What's
> intriguing though is that Knoppix (Debian) running 2.4.20 appears to work.

Intriguing indeed.  Torsten sent the kernel .config for knoppix 2.4.24
and I did a diff on it with a Slackware 2.4.24 .config that I happen
to be using on one of my machines in England.  There are 2,403 lines
in the diff output, and truckloads of USB differences.  :(

> I've looked at the 2.4.20 source on debian.org, they have a few patches to USB
> code, but I'm not sure if anything is relevant. The changes to usb-ohci.c look
> significant, but I didn't think ohci was involved here?

Torsten's modprobe output seems to agree with you, it says

# lsmod |grep usb
usb-storage            65312   0
usbserial              19580   0 (autoclean) (unused)
usb-ohci               18664   0 (unused)
scsi_mod               97268   6 [sd_mod usb-storage st sr_mod sg ide-scsi]

> I also wondered if this thing might need an unusual_dev.h entry, but there's
> nothing there. All distros I've looked at have an entry for rev.1 of the chip,
> but it doesn't work with rev.2 - completely kills it if enabled.

Manufacturers have a habit of making huge changes without telling anyone. :(

> I'm not too keen on putting a 2.6 kernel under SME, I suspect there may be
> dependencies that could break. I'd really like to know what Debian have done to
> get their driver to work :)

It's time I bought one of these enclosures and installed Debian on a box...

73,
Ged.


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