Gene Heskett <ghesk...@shentel.net> writes:

> Generally speaking, only because the disc is random access.

But a disk dedicated to vtapes should be doing a lot of sequetial
accesses: once it has been formatted and the slots have been assigned,
it is writting files the size of one Amanda's chunk. In fact, that would
be worth a study: the disk usage for vtapes vs. normal disk usage.

That is just gross figures but:

Users' home directories:
Filesystem    Size    Used   Avail Capacity  Mounted on
/dev/da1p1    2.9T    851G    1.8T    31%    /home
2565312 files, 223129681 used, 556890331 free
(564355 frags, 69540747 blocks, 0.1% fragmentation)

Amanda vtape disk:
Filesystem    Size    Used   Avail Capacity  Mounted on
/dev/ada5p1   2.6T    2.2T    269G    89%    /automnt/ada5
475 files, 582393950 used, 127171372 free
(84 frags, 15896411 blocks, 0.0% fragmentation)

The vtape disk is slightly older than the users' home, definitely fuller
and less fragmented, so I would guess big sequetial files with little
head movement.

Good luck with your health.

Olivier

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