On Fri, 2 Jan 2004, Eric Lussard wrote:
> <5>usb-storage: This device (05e3,0701,0002 S 02 P 50) has an unneeded
> Protocol entry
> in unusual_devs.h
> <4> Please send a copy of this message to
> <[EMAIL PROTECTED]>
Yet another unusual_devs change! I really should stick to a policy of
reading through all the new email before sending any replies...
Greg, this change can be applied to 2.4 and 2.6
===== unusual_devs.h 1.86 vs edited =====
--- 1.86/drivers/usb/storage/unusual_devs.h Thu Dec 4 05:18:54 2003
+++ edited/drivers/usb/storage/unusual_devs.h Fri Jan 2 12:35:32 2004
@@ -371,7 +371,7 @@
UNUSUAL_DEV( 0x05e3, 0x0701, 0x0000, 0xffff,
"",
"USB TO IDE",
- US_SC_SCSI, US_PR_BULK, NULL,
+ US_SC_SCSI, US_PR_DEVICE, NULL,
US_FL_MODE_XLATE ),
/* Reported by Peter Marks <[EMAIL PROTECTED]>
On Fri, 2 Jan 2004, Eric Lussard wrote:
>
> Hello list,
>
> I've got some problems with my DVD writer in an external USB-IDE case, using
> the
> EHCI driver. Using UHCI everything works. I can connect the device, mount
> disks
> and read from the device without problems. When I write a CD/DVD - with
> cdrecord
> or growisofs - the system writes something and after some time the device
> hang.
> After that the activity LED is on, and the usb-storage module is used and
> cannot be
> removed.
> USB/IDE box from /proc/bus/usb/devices:
> T: Bus=01 Lev=01 Prnt=01 Port=04 Cnt=01 Dev#= 2 Spd=480 MxCh= 0
> D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
> P: Vendor=05e3 ProdID=0701 Rev= 0.02
> S: Manufacturer=Genesyslogic
> S: Product=USB Mass Storage Device
> C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 4mA
> I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=02 Prot=50 Driver=usb-storage
> E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=125us
As David Brownell noted, those Genesys Logic devices have given us a lot
of trouble. The patch I included above will _not_ fix your problem. But
doing this might; it's a change you'll have to make by hand.
In your kernel source tree, find and edit the file
drivers/usb/storage/scsiglue.c. Somewhere around line 315 you'll see:
/* limit the total size of a transfer to 120 KB */
.max_sectors = 240,
Change that to read
/* limit the total size of a transfer to 64 KB */
.max_sectors = 128,
and rebuild the usb-storage module. Other people have found that once
this change has been made their Genesys devices work okay.
Alan Stern
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