MATLEVAN@EKU.BITNET (Jerry LeVan) (09/04/90)
hello netters,
There appears to be some obscurity in the tar documentation
(online). I wanted to backup my X11 source and binaries. They
are currently living on an HD80 (a single aux partion for the whole
disk). When I tried tar<~k> to get the commando help I generated
a command line:
tar cvlbBf 16 4500 /dev/rmt/tc1 .
The resulting execution would write only about 150 files to the
tape and call for another "disk". After about 3 tapes were
quickly called for I realized that something was obviously wrong
I though perhaps there was a blocking problem so I tried:
tar cvlbB 16 4500 - | tcb > /dev/rmt/tc1
Same problem.
The online man page for tar claims that the B option is the size
of the device in 512 byte blocks, so I am trying the following
tar cvlBf 72000 - | tcb > /dev/rmt/tc1
This seems to be putting many more files on the tape and
the program has just asked for another tape...
Hmmm...That was quick the second tape only had 7 files with about
200 (512 byte blocks) written when tcb croaked with an I/O error.
Sigh...Is there a definitive technique for creating a multitape
tar /cpio archive (and of course restoration)?
Can anyone think of any reason that using system utilities
needs to be an experimental science?
Jerry
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| Jerry LeVan | Phone:(606)-622-1931 |
| Department of Computer Science | |
| Eastern Kentucky University | Email:matlevan@eku.bitnet |
| Richmond Ky 40475 | |
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| "The series converges so slowly that it actually diverges." |
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