fbackup , data size on DLT

[MEYER_8]

I'm using fbackup to save data from a disk to a DLT . "du -sk " give 6 Gb on disk when fbackup indicate total blocks written to output file /dev/rmt/0m 11249899 which is around 11 Gb . What is the explaination ?

[Robert-Jan Goossens_1]

11249899 blocks of 512 bytes.

# echo "512*11249899/1024/1024" | bc
5493 Mbytes

Regards,
Robert-Jan

[Patrick Wallek]

Well, the easiest thing to do would be to get the list of files that fbackup backed up and compare it to the files in the filesystem you are backing up.

You should see any discrepancies pretty quick.

[MEYER_8]

robert-jean

man fbackup talks about number of 1024-byte blocks per records !
What is the size of blocks on tape 512 or 1024 ?

[Robert-Jan Goossens_1 · Accepted solution]

Hi Gabriel,

----
Beginning at 11.00, fbackup has been enhanced so that it gives the number of
blocks written to tape. The blocks are 512 bytes in size, so multiply the
number of blocks written to tape by 512 to get the size (in bytes) of the
archive.
----

DocId: UBACKKBRC00007114

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http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000062778231

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Robert-Jan

[MEYER_8]

satisfiing answer