NetBSD Problem Report #36212

From martin@duskware.de  Wed Apr 25 12:07:24 2007
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Date: Wed, 25 Apr 2007 12:04:13 +0000 (UTC)
From: uair00@gmail.com
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To: netbsd-bugs-owner@NetBSD.org
Subject: Hanging while using a vnode disk
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>Number:         36212
>Category:       misc
>Synopsis:       Hanging while using a vnode disk
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    misc-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Apr 25 12:10:00 +0000 2007
>Originator:     Hugo Rivera
>Release:        3.1
>Organization:
>Environment:
NetBSD janko 3.1 NetBSD 3.1 (JANKO64) #0: Fri Apr 20 17:50:21 BOT 2007  root@janko:/usr/src/sys/arch/amd64/compile/JANKO64 amd64
>Description:
NetBSD completely hangs up while copying files from anywhere to a mounted vnode disk configured using a FAT disk image file; one must reboot the system (using the RESET button) because nothing works anymore.
Here's my fdisk output:

Disk: /dev/rvnd0d
NetBSD disklabel disk geometry:
cylinders: 488, heads: 64, sectors/track: 32 (2048 sectors/cylinder)
total sectors: 1000000

BIOS disk geometry:
cylinders: 489, heads: 64, sectors/track: 32 (2048 sectors/cylinder)
total sectors: 1000000

Partition table:
0: Primary DOS with 32 bit FAT - LBA (sysid 12)
    start 32, size 999968 (488 MB, Cyls 0-488/18/1)
1: <UNUSED>
2: <UNUSED>
3: <UNUSED>
Bootselector disabled.

and the disklabel output:

type: vnd
disk: vnd
label: VirtualFAT
flags:
bytes/sector: 512
sectors/track: 32
tracks/cylinder: 64
sectors/cylinder: 2048
cylinders: 488
total sectors: 1000000
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0 

5 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 d:   1000000         0     unused      0     0        # (Cyl.      0 -    488*)
 e:    999968        32      MSDOS                     # (Cyl.      0*-    488*)

>How-To-Repeat:
- Create a FAT disk image file:
dd if=/dev/zero of=vFAT.img bs=1024 count=500000
vnconfig -vc vnd0 vFAT.img
fdisk -u vnd0
CREATE A DOS PARTITION (ID 12)
disklabel -e -I
newfs_msdos -F32 /dev/vnd0e
mount -t msdos -o rw /dev/vnd0e myFAT
cp anything_you_want myFAT

It should be hanged by now
>Fix:
None; maybe I am doing something wrong, but I do not think that that should cause such a severe hang up.

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