QUESTION:
How can I copy an 8mm tape from a tapedrive connected to CRE1 (hostA)
to another 8mm tapedrive connected to CRE2 (hostB)? CRE1 and CRE2 are
on the same local ethernet network and are both at AIX 3.2.
We are trying this route because both systems have limited disk space.
We tried:
dd if=/dev/rmt0 | rsh CRE2 dd of=/dev/rmt0
and it gave us something about not enough space for the read. Could
this be a problem with the block size? Both tape drives are configured
with the size of 0 (variable length). This is due to problems we have
with some tape archiving problems.
We also tried:
tar -xvf /dev/rmt0 | rsh CRE2 tar -cvf /dev/rmt0
but it didn't do anything and didn't report any errors. The cursor
just came back after about 20-30 seconds.
We tried:
dd if=/dev/rmt0 | tar -xvf - | rsh tar -cvf - | dd of=/dev/rmt0
and we had the same results as the tar command above.
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A: I was able to copy a tape to a remote tape device. I created a
tar archive to tape with a block size of 1024.
I was then able to copy the tape to a remote tape drive with the
command:
dd if=/dev/rmtX ibs=1024 obs=512 | rsh $HOSTNAME 'dd of=/dev/rmtXX
ibs=512 obs=1024'
where | is the pipe symbol and ' is a single quote. This is a single
command and should be typed in on one line.
This command requires that an input block size be specified. You will
need to determine the block size of the source tape. This can be done
as follows (the tape device must be set to variable (0) block size):
dd count=1 if=/dev/rmtX of=file_name ibs=2048
ls -l file_name
The block size of your tape is the size of file_name. You should
set the source tape drive's block size to the size of file_name. You
can then issue the command above as follows:
dd if=/dev/rmtX ibs=(size of file_name) obs=512 | rsh $HOSTNAME
'dd of=/dev/rmtXX ibs=512 obs=(desired block size of tape)'
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This item was created from library item Q649191 CNKQK
Additional search words:
CNKQK CONNECTED COPY HOSTA HOSTB IX JAN94 OP OZIBM OZNEW RISCOSO
RISCSYSTEM SOFTWARE SYS TAPE TAPEDRIVE 8MM
WWQA: ITEM: RTA000036988 ITEM: RTA000036988
Dated: 11/1996 Category: RISCOSO
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