Trouble using dd for remote back ups
Hi,
I'm having trouble using to dd in conjunction with dump for remote backups. In particular, I'm attempting to use a combination of ssh/dump/dd to back up remote systems to a tape drive on my local linuxbox. I'm using dd 4.1 with Linux 7.2, on an i686 architecture. For example, #ssh REMOTELINUXBOX /sbin/dump -0 -f - /dev/sda2 | dd of=/dev/nst0 yields the following sequence: DUMP: Date of this level 0 dump: Thu May 16 21:03:40 2002 DUMP: Dumping /dev/sda2 (/) to standard output DUMP: Exclude ext3 journal inode 8 DUMP: Label: / DUMP: mapping (Pass I) [regular files] DUMP: mapping (Pass II) [directories] DUMP: estimated 10472849 tape blocks. DUMP: Volume 1 started with block 1 at: Thu May 16 21:03:53 2002 DUMP: dumping (Pass III) [directories] DUMP: dumping (Pass IV) [regular files] DUMP: 2.40% done at 837 kB/s, finished in 3:23 DUMP: 4.84% done at 844 kB/s, finished in 3:16 DUMP: 7.24% done at 842 kB/s, finished in 3:12 DUMP: 9.64% done at 841 kB/s, finished in 3:07 DUMP: 12.03% done at 839 kB/s, finished in 3:02 DUMP: 14.41% done at 838 kB/s, finished in 2:58 dd: writing `/dev/nst0': Invalid argument 3156720+41 records in 3156740+0 records out Note the 'Invalid argument' error that comes up 15% of the way through the dump. I can also generate a similar error by attempting to write a simple file to the tape: # echo `date` | dd of=/dev/nst0 yields dd: writing `/dev/nst0': Invalid argument 0+1 records in 0+0 records out For a truley bizaare twist to this, if I issue a simliar dump command to a REMOTESOLARISBOX, the dump completes just fine. Is this a bug, or am I doing something wrong? Thanks, Jason Foat |
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