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Date:      Tue, 12 Dec 2006 21:44:02 GMT
From:      Sam<sbaskinger@lumeta.com>
To:        freebsd-gnats-submit@FreeBSD.org
Subject:   usb/106648: USB Floppy on D1950 10 min Hang on Insert w/o Floppy Disk
Message-ID:  <200612122144.kBCLi279004587@www.freebsd.org>
Resent-Message-ID: <200612122200.kBCM0MDx025390@freefall.freebsd.org>

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>Number:         106648
>Category:       usb
>Synopsis:       USB Floppy on D1950 10 min Hang on Insert w/o Floppy Disk
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-usb
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Dec 12 22:00:22 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Sam
>Release:        RELENG_6 from 2006-11-18
>Organization:
Lumeta Corporation
>Environment:
FreeBSD dual-061211-125111 6.2-LUMETA FreeBSD 6.2-LUMETA #0: Tue Nov 21 01:17:27 
UTC 2006     root@mothra.corp.lumeta.com:/usr/obj/usr/src/sys/LUMETA  i386
>Description:
When a USB Floppy drive is plugged into a Dell D1950 with no disk in the drive, the system hangs during boot for 10 minutes or so until it times out.

If the drive is plugged into the system with no disk a similar timeout behavior is observable during which if you unplug the device a panic freezes the USB bus. The system must be restarted manually to recover.

Following are some relevant portions of the system log from a boot:

Dec 12 14:36:43 dual-061211-125111 kernel: da1 at umass-sim0 bus 0 target 0 lun 0
Dec 12 14:36:43 dual-061211-125111 kernel: da1: <NEC USB UF000x 1.50> Removable Direct Access SCSI-0 device 
Dec 12 14:36:43 dual-061211-125111 kernel: da1: 1.000MB/s transfers
Dec 12 14:36:43 dual-061211-125111 kernel: da1: 1MB (2880 512 byte sectors: 64H 32S/T 1C)
Dec 12 14:36:44 dual-061211-125111 kernel: umass0: Unsupported UFI command 0x35
Dec 12 14:36:44 dual-061211-125111 kernel: (da1:umass-sim0:0:0:0): Synchronize cache failed, status == 0x6, scsi status == 0x0
Dec 12 14:36:44 dual-061211-125111 kernel: umass0: Unsupported UFI command 0x35
Dec 12 14:36:44 dual-061211-125111 kernel: (da1:umass-sim0:0:0:0): Synchronize cache failed, status == 0x6, scsi status == 0x0
Dec 12 14:36:44 dual-061211-125111 kernel: umass0: Unsupported UFI command 0x35
Dec 12 14:36:44 dual-061211-125111 kernel: (da1:umass-sim0:0:0:0): Synchronize cache failed, status == 0x6, scsi status == 0x0
Dec 12 14:36:52 dual-061211-125111 kernel: umass0: Unsupported UFI command 0x35
Dec 12 14:36:52 dual-061211-125111 kernel: (da1:umass-sim0:0:0:0): Synchronize cache failed, status == 0x6, scsi status == 0x0
Dec 12 14:37:00 dual-061211-125111 kernel: umass0: at uhub4 port 1 (addr 3) disconnected
Dec 12 14:37:00 dual-061211-125111 kernel: (da1:umass-sim0:0:0:0): lost device
Dec 12 14:37:00 dual-061211-125111 kernel: (da1:umass-sim0:0:0:0): removing device entry
Dec 12 14:37:00 dual-061211-125111 kernel: umass0: detached
Dec 12 14:37:15 dual-061211-125111 kernel: umass0: NEC NEC USB UF000x, rev 1.10/1.50, addr 3
Dec 12 14:37:16 dual-061211-125111 kernel: (probe0:umass-sim0:0:0:0): INQUIRY. CDB: 12 0 0 0 24 0 
Dec 12 14:37:16 dual-061211-125111 kernel: (probe0:umass-sim0:0:0:0): CAM Status: SCSI Status Error
Dec 12 14:37:16 dual-061211-125111 kernel: (probe0:umass-sim0:0:0:0): SCSI Status: Check Condition
Dec 12 14:37:16 dual-061211-125111 kernel: (probe0:umass-sim0:0:0:0): UNIT ATTENTION asc:29,0
Dec 12 14:37:16 dual-061211-125111 kernel: (probe0:umass-sim0:0:0:0): Power on, reset, or bus device reset occurred
Dec 12 14:37:16 dual-061211-125111 kernel: (probe0:umass-sim0:0:0:0): Retrying Command (per Sense Data)
Dec 12 14:38:07 dual-061211-125111 kernel: (da1:umass-sim0:0:0:0): got CAM status 0x4
Dec 12 14:38:07 dual-061211-125111 kernel: (da1:umass-sim0:0:0:0): fatal error, failed to attach to device
Dec 12 14:38:07 dual-061211-125111 kernel: (da1:umass-sim0:0:0:0): lost device
Dec 12 14:43:32 dual-061211-125111 kernel: (da1:umass-sim0:0:0:0): removing device entry
Dec 12 14:43:32 dual-061211-125111 kernel: Opened disk da1 -> 5

>How-To-Repeat:
On a Dell D1950 plug in a USB floppy with no disk in it and boot the system. It will hang when trying to read it.

Alternately, plug the floppy with no disk in it and then remove it. The USB bus becomes unusable.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:



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