kern/71455: Slow USB umass performance of 5.3

Radim Kolar hsn at netmag.cz
Tue Sep 7 03:30:23 PDT 2004


>Number:         71455
>Category:       kern
>Synopsis:       Slow USB umass performance of 5.3
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Sep 07 10:30:22 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator:     Radim Kolar
>Release:        FreeBSD 5.3-BETA3 i386
>Organization:
lamers interacionals
>Environment:
System: FreeBSD sanatana.dharma 5.3-BETA3 FreeBSD 5.3-BETA3 #7: Sun Sep 5 18:40:24 CEST 2004 root at sanatana.dharma:/usr/obj/usr/src/sys/UP i386

>Description:
One of my USB flash disks works very slowly in FreeBSD. It is a quite old
device. This applies to both freebsd versions 5.2 and 5.3. His transfer speed
is around 90kB/sec. The same disk works in Windoze or Linux at 600kB/sec.

Controller /dev/usb0:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), Intel(0x0000), rev 1.00
 port 1 addr 2: full speed, power 100 mA, config 1, USB Disk(0x0100), PNY(0x0d7d), rev 1.00
 port 2 powered

Aug 29 21:11:38 sanatana kernel: umass0: PNY USB Disk, rev 1.10/1.00, addr 2
Aug 29 21:11:38 sanatana kernel: umass0:0:0:-1: Attached to scbus0
Aug 29 21:11:39 sanatana kernel: pass0 at umass-sim0 bus 0 target 0 lun 0
Aug 29 21:11:39 sanatana kernel: pass0: < USB DISK 2.0B> Removable Direct Access
 SCSI-0 device
Aug 29 21:11:39 sanatana kernel: pass0: Serial Number
Aug 29 21:11:39 sanatana kernel: pass0: 1.000MB/s transfers
>How-To-Repeat:
It can be reproduced anytime by using device mentioned above.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:


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