On Thu, Jan 04, 2007 at 04:01:19PM -0800, Pete Zaitcev wrote: > But it seems that I found a case when this does not work. It happens > with Sun's virtual floppy, which returns a seemingly normal INQUIRY > data (this is CBI, LUN set to 1, and device simply ignores it, most > likely): > > ffff81003f5575c0 1779789944 S Co:004:00 s 21 00 0000 0000 000c 12 = 12200000 > 24000000 00000000 > ffff81003f5575c0 1779792226 C Co:004:00 0 12 > > ffff8100374c2980 1779792240 S Bi:004:01 -115 36 < > ffff8100374c2980 1779795215 C Bi:004:01 0 36 = 00800001 1f000000 414d4920 > 20202020 56697274 75616c20 466c6f70 70792020 > ffff81003f5575c0 1779795226 S Ii:004:03 -115 2 < > ffff81003f5575c0 1779821221 C Ii:004:03 0 2 = 0000
What exactly happens? I would assume that an error response to an INQUIRY
for LUN 1 would "Do the Right Thing".
> So this got me wondering, why do we use such curiously complicated
> way of trimming LUNs instead of something like this:
>
> --- linux-2.6.18-1.2769.el5/drivers/usb/storage/usb.c 2006-09-19
> 20:42:06.000000000 -0700
> +++ linux-2.6.18-1.2769.el5-ufi/drivers/usb/storage/usb.c 2007-01-03
> 17:57:24.000000000 -0800
> @@ -692,6 +692,7 @@ static int get_protocol(struct us_data *
> case US_SC_UFI:
> us->protocol_name = "Uniform Floppy Interface (UFI)";
> us->proto_handler = usb_stor_ufi_command;
> + us->max_lun = 0;
> break;
>
> #ifdef CONFIG_USB_STORAGE_ISD200
>
> I verified this to work and solve my problem, whereas backporting the
> code from 2.6.20-rc2 did not work.
>
> Have anyone ever seen a multi-headed USB floppy?
I've seen floppy/CF and floppy/CD-ROM combinations on multiple LUNs. I've
gotten e-mail from people with multiple-head floppies. I've never seen
one, personally.
Matt
--
Matthew Dharm Home: [EMAIL PROTECTED]
Maintainer, Linux USB Mass Storage Driver
Your lips are twitching. You're playing Quake aren't you.
-- Stef to Greg
User Friendly, 8/11/1998
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