Everytime I try to unmount one of the ufs partitions on my harddisk the system
hangs and I can do nothing but a hard reset. 

This happens whenever I shutdown the system too. It tries to unmount one of 
the partitions and hangs before the "dirty flag" is removed from any of the 
partitions. Thats why all the partitions are checked/repaired by fsck 
_everytime_ I boot. 

I have no problem whith unmounting nfs/msdos/ext2 partitions.

This problem appeared some weeks ago and I never had it before with -current.

Any ideas how the problem can be solved ?

Benedikt Schmidt
# Device                Mountpoint      FStype  Options         Dump    Pass#
/dev/ad2s1b             none            swap    sw              0       0
/dev/ad2s1a             /               ufs     rw              1       1
/dev/ad2s3e             /usr/src        ufs     rw,noauto       0       0
/dev/ad2s4e             /usr/home       ufs     rw,noauto               0       0
/dev/cd0c               /cdrom  cd9660  ro,noauto               0       0
/dev/acd0c              /dvd    cd9660  ro,noauto               0       0
proc                    /proc           procfs  rw              0       0
Copyright (c) 1992-2000 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD 5.0-CURRENT #1: Tue Aug  8 05:18:42 CEST 2000
    [EMAIL PROTECTED]:/usr/src/sys/compile/STEELE
Timecounter "i8254"  frequency 1193182 Hz
Timecounter "TSC"  frequency 412502164 Hz
CPU: Pentium II/Pentium II Xeon/Celeron (412.50-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x665  Stepping = 5
real memory  = 134217728 (131072K bytes)
avail memory = 127184896 (124204K bytes)
Preloaded elf kernel "kernel" at 0xc036c000.
Preloaded elf module "randomdev.ko" at 0xc036c09c.
Pentium Pro MTRR support enabled
VESA: v3.0, 16384k memory, flags:0x1, mode table:0xc02fc9b7 (1000117)
VESA: 3dfx Interactive, Inc.
md0: Malloc disk
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82443BX (440 BX) host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
pci0: <Intel 82443BX (440 BX) host to PCI bridge> at 0.0
pcib1: <Intel 82443BX (440 BX) PCI-PCI (AGP) bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <3Dfx Voodoo 3 graphics accelerator> at 0.0 irq 10
isab0: <Intel 82371AB PCI to ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 ATA33 controller> port 0xf000-0xf00f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
pci0: <Intel 82371AB/EB (PIIX4) USB controller> at 7.2
pci0: <Intel 82371AB Power management controller> at 7.3
sym0: <810a> port 0xa400-0xa4ff mem 0xeb001000-0xeb0010ff irq 11 at device 11.0 on pci0
sym0: Symbios NVRAM, ID 7, Fast-10, SE, parity checking
sym0: open drain IRQ line driver
sym0: using LOAD/STORE-based firmware.
sym0: PCI BUS clock seems too high: 37822 KHz.
rl0: <RealTek 8139 10/100BaseTX> port 0xa800-0xa8ff mem 0xeb000000-0xeb0000ff irq 5 at 
device 13.0 on pci0
rl0: Ethernet address: 00:e0:7d:7c:2b:37
miibus0: <MII bus> on rl0
rlphy0: <RealTek internal media interface> on miibus0
rlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pcm0: <Creative EMU10K1> port 0xac00-0xac1f irq 10 at device 15.0 on pci0
atapci1: <HighPoint HPT366 ATA66 controller> port 
0xbc00-0xbcff,0xb800-0xb803,0xb400-0xb407 irq 11 at device 19.0 on pci0
atapci2: <HighPoint HPT366 ATA66 controller> port 
0xc800-0xc8ff,0xc400-0xc403,0xc000-0xc007 irq 11 at device 19.1 on pci0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model Generic PS/2 mouse, device ID 0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: Generic chipset (EPP/NIBBLE) in COMPATIBLE mode
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
unknown: <PNP0303> can't assign resources
unknown: <PNP0f13> can't assign resources
unknown: <PNP0501> can't assign resources
unknown: <PNP0700> can't assign resources
unknown: <PNP0400> can't assign resources
unknown: <PNP0501> can't assign resources
ata0-master: DMA limited to UDMA33, non-ATA66 compliant cable
ad0: 24833MB <QUANTUM FIREBALLlct08 26> [50456/16/63] at ata0-master using UDMA33
ad2: 13783MB <IBM-DTTA-371440> [28005/16/63] at ata1-master using UDMA33
acd0: DVD-ROM <TOSHIBA DVD-ROM SD-M1402> at ata0-slave using UDMA33
Waiting 2 seconds for SCSI devices to settle
(noperiph:sym0:0:-1:-1): SCSI BUS reset delivered.
Mounting root from ufs:/dev/ad2s1a
WARNING: / was not properly dismounted
cd0 at sym0 bus 0 target 1 lun 0
cd0: <TEAC CD-R55S 1.0Q> Removable CD-ROM SCSI-2 device 
cd0: 10.000MB/s transfers (10.000MHz, offset 8)
cd0: cd present [272143 x 2048 byte records]

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