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mt -f /dev/nst0 rewind
tar -tzf /dev/nst0
Open in new window
11:28:28$ mt -f /dev/nst0a rewind
11:33:40$ dd if=/dev/nst0a of=xxx count=1 bs=$((512*256))
0+1 records in
0+1 records out
64512 bytes (65 kB, 63 KiB) copied, 0.0296237 s, 2.2 MB/s
11:34:06$ echo $((64512/512))
11:46:25$ mt -f /dev/nst0a rewind
11:46:52$ dd if=/dev/nst0a of=xxx count=1 bs=$((512*126))
1+0 records in
1+0 records out
64512 bytes (65 kB, 63 KiB) copied, 0.0398174 s, 1.6 MB/s
11:47:08$ file xxx
xxx: gzip compressed data, last modified: Sat Jan 3 08:52:52 2009, from Unix
11:47:17$ cat xxx|gzip -d >yyy
gzip: stdin: unexpected end of file
11:47:37$ file yyy
yyy: POSIX tar archive (GNU)
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