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dump won't dump an fss snapshot on netbsd-5

I just updated the machine connected to my tape drive from netbsd-4 (stable) to netbsd-5 (stable). Now dump will not back up my fss snapshots...

# fssconfig fss0 /home /var/tmp/maat-home
# fssconfig -l
fss0: /home
fss1: not in use
fss2: not in use
fss3: not in use

# dump -L maat-home -b 32 -0eautf /dev/nrst0 /dev/fss0
  [16:26:21 EDT] DUMP: Date of this level 0 dump: Sun Jul 26 16:26:21 2009
  [16:26:21 EDT] DUMP: Date of last level 0 dump: the epoch
[16:26:21 EDT] DUMP: Dumping /dev/fss0 (an unlisted file system) to /dev/nrst0
  [16:26:21 EDT] DUMP: Label: maat-home
  [16:26:21 EDT] DUMP: mapping (Pass I) [regular files]
  [16:26:47 EDT] DUMP: mapping (Pass II) [directories]
  [16:26:47 EDT] DUMP: estimated 4749236 tape blocks.
  [16:26:47 EDT] DUMP: Volume 1 started at: Sun Jul 26 16:26:47 2009
  DUMP: slave couldn't reopen disk: Device busy
  DUMP: slave couldn't reopen disk: Device busy
  [16:26:47 EDT] DUMP: The ENTIRE dump is aborted.

... here's my tape drive...

# dmesg|grep st0
st0 at scsibus0 target 1 lun 0: <IBM, ULT3580-TD2, 38D0> tape removable
st0: density code 64, variable blocks, write-enabled
st0: sync (50.00ns offset 8), 16-bit (40.000MB/s) transfers

... and its status...

# mt status
SCSI tape drive, residual=0
blocksize: 32768 (0, 0, 0, 0)
density: 66 (0, 0, 0, 0)
current file number: 0
current block number: 0

... dump is working fine on "normal" ffs filesystems. I've been using fss snapshots for this purpose for a few years now (since 2.0) with no problems. Any advice would be great.


Attachment: smime.p7s
Description: S/MIME Cryptographic Signature

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