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The Question is:
I am trying to find out how many bytes are in a standard VMS block.
I am copying files from a system to COMPAQ DLT IV tape media
with a density of 20Gb Compressed on a TZ88 tape drive.
Due to the size of the files I currently copy a single file to each
tape but think I should be able to copy more, but don't understand
the block sizes, I cannot allow files to span two tapes as the
person reading the files uses a UNIX program to read them and
the program cannot cope with this.
On the system the files block size is 19,828,620 which assuming
512 bytes per block (from another Query I read) is 10 Gb. Have
I got this correct?
When I copy the file to tape the block size reads 314,740. What
is the size of this file in bytes i.e. is it the same file compressed
into a 161 Mb file. Also the other way around how many blocks
can I fit on a DLT IV tape, if I use 20Gb compress?
Thanks for your Help.
Regards,
Martin.
The Answer is :
Please see the FAQ sections PROG14 and MISC13 as a start.
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