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Message-Id: <199901170522.VAA05051@hub.freebsd.org>
Date: Sat, 16 Jan 1999 21:22:45 -0800 (PST)
From: nakaji@zeisei.dpri.kyoto-u.ac.jp
To: freebsd-gnats-submit@FreeBSD.ORG
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Subject: kern/9535: Don't use tagged queuing on SAMSUNG HDD
Sender: owner-freebsd-bugs@FreeBSD.ORG
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>Number:         9535
>Category:       kern
>Synopsis:       Don't use tagged queuing on SAMSUNG HDD
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Sat Jan 16 21:30:01 PST 1999
>Closed-Date:
>Last-Modified:
>Originator:     NAKAJI Hiroyuki
>Release:        3.0-CURRENT
>Organization:
DPRI, Kyoto Univ.
>Environment:
FreeBSD nakaji.home.jp 3.0-CURRENT FreeBSD 3.0-CURRENT #0: Sun Jan 17 13:26:35 JST 1999     root@nakaji.home.jp:/export/src/sys/compile/NAKAJI  i386

>Description:
If tagged queueing is enabled(*), my <SAMSUNG WN34324U (gm030) 0105> hangs up
when many files are written on the disk.

(*) from dmesg
da0 at ncr0 bus 0 target 0 lun 0
da0: <SAMSUNG WN34324U (gm030) 0105> Fixed Direct Access SCSI-2 device 
da0: Serial Number         
da0: 20.0MB/s transfers (20.0MHz, offset 15), Tagged Queueing Enabled
da0: 4120MB (8438976 512 byte sectors: 8H 32S/T 32963C)

>How-To-Repeat:

>Fix:
A patch is in 
http://zeisei5.dpri.kyoto-u.ac.jp/~nakaji/install/FreeBSD/ref/cam_xpt.c.diff

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

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