DAT 70 (DDS 5?) Tape Drive Compression Factor (SUMMARY)

From: Steven Sim <steven.sim_at_faplccc.net>
Date: Wed Jan 18 2006 - 10:06:35 EST
Hello All;

Thanks to all who replied!!!!

My original question was if a dump or a tar was written to tape with the 
"c" compression factor in the device name, like so;

#tar cvf /dev/rmt/0cn <some directory>

Would it be necessary for the reading of the same tape to also use the 
"c" compression option?

Like so

#tar tvf /dev/rmt/0n <some directory>

The unanimous answer is no, it would not be necessary as the compression 
is implemented in hardware and the h/w would be smart enough to 
recognize it's own compression and decompress accordingly.

Thus a read operation on /dev/rmt/0n would still be successfull if the 
original write operation used a compression facility e.g.  /dev/rmt/0c


Warmest Regards
Steven Sim

Fujitsu Asia Pte. Ltd.

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Received on Wed Jan 18 10:08:39 2006

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