Amanda-Users

dd problems

2006-11-06 16:23:39
Subject: dd problems
From: Nick Brockner <nbrockne AT hamilton DOT edu>
To: AMANDA support list <amanda-users AT amanda DOT org>
Date: Mon, 06 Nov 2006 12:28:02 -0500
Hi All,

I am trying to use dd to copy a tape made by amanda to a temp spot on the HDD, but I am having great difficulty. When I try to use dd, it will only copy one file at a time then stop, no matter what I do. As far as I know, dd should just take the entire tape from beginning to end. . .

See below for a transcript of my command line dealings with dd:

[root ~]# mt -f /dev/st0 rewind
[root ~]# mt -f /dev/nst0 tell
At block 0.
[root ~]# dd if=/dev/nst0 of=/dumps/amanda/copy bs=32k
1+0 records in
1+0 records out
32768 bytes (33 kB) copied, 9.28853 seconds, 3.5 kB/s
[root ~]# mt -f /dev/nst0 tell
At block 1.
[root ~]# dd if=/dev/nst0 of=/dumps/amanda/copy bs=32k
197+0 records in
197+0 records out
6455296 bytes (6.5 MB) copied, 1.79274 seconds, 3.6 MB/s
[root ~]# mt -f /dev/nst0 tell
At block 198.
[root ~]# dd if=/dev/nst0 of=/dumps/amanda/copy bs=32k
281+0 records in
281+0 records out
9207808 bytes (9.2 MB) copied, 2.6173 seconds, 3.5 MB/s
[root ~]# mt -f /dev/nst0 tell
At block 479.
[root ~]#


It will continue like this for all of the DLEs on the tape, one at a time. Any ideas?? Is this due to some strange way Amanda writes out the tapes??

Thanks,
Nick

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