Subject: kern/8976: USB transfers to 250MB zip drive cause massive driver failure
To: None <>
From: Matthias Scheler <>
List: netbsd-bugs
Date: 12/09/1999 10:06:49
>Number:         8976
>Category:       kern
>Synopsis:       USB transfers to 250MB zip drive cause massive driver failure
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people (Kernel Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Dec  9 10:06:00 1999
>Originator:     Matthias Scheler
Matthias Scheler                  
>Release:        19991209
System: NetBSD 1.4P NetBSD 1.4P (LYSSA) #3: Thu Dec 9 18:44:32 CET 1999 i386

My system has got a logitech USB mouse and a 250MB Zip drive connected to the
USB hub integrated into my Eizo F67 monitor:

uhci0 at pci0 dev 7 function 2: Intel 82371AB USB Host Controller (PIIX4) (rev. 0x01)
uhci0: interrupting at irq 15
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhub1 at uhub0 port 1
uhub1: EIZO hub, class 9/0, rev 1.00/1.01, addr 2
uhub1: 5 ports with 5 removable, self powered
ugen0 at uhub1 port 1
ugen0: EIZO monitor, rev 1.00/1.01, addr 3
umass0 at uhub1 port 4 configuration 1 interface 0
umass0: Iomega USB Zip 250, rev 1.10/1.00, addr 4
umass0: SCSI over Bulk-Only (iclass 8/6/80)
scsibus2 at umass0: 2 targets, 1 luns per target
ums0 at uhub1 port 5 configuration 1 interface 0
ums0: Logitech USB-PS/2 Mouse, rev 1.00/1.10, addr 5, iclass 3/1
ums0: 3 buttons and Z dir.

If I try to access the Zip drive I get corrupted data back - "ls" show
weird directory entries on the MS-DOS volume - and system starts to
repeat this kernel message in an endless loop:

uhub1: port error, giving up port 4

From time to a single instance of this error message appears, too:

uhub1: device problem, disabling port 4

It is not hardware problem because all the components work fine with
Windows 98.

Boot a real current kernel and try to read data from a 250MB USB zip drive.

None provided.