--
Martin Hepworth
Snr Systems Administrator
Solid State Logic
Tel: +44 (0)1865 842300


Geert Uytterhoeven wrote:

On Tue, 12 Apr 2005, Eric Dantan Rzewnicki wrote:

My current amanda server lives on one big 1.4TB partition on an SATA
hardware raid controller. Copying from the holding disk to file-tapes on
the same device has so far been limited to about 15MB/s. This seems
quite slow to me. Does amanda add any overhead above a simple copy on
the same device? An hdparm -t on this system when it's idle gives around
58MB/s.

Just for comparison...

I don't use a holding disk, but my vtapes are on the same (single) SATA disk as
the other data on my backup machine.

While hdparm -t claims ca. 55 MB/s for the raw disk, level 0 dumps (actually
tars) from my digital picture collection (ca 1.3 MB/file) to the vtapes are
performed at 10-13 MB/s.

Gr{oetje,eeting}s,

                                                Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert AT linux-m68k 
DOT org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                                            -- Linus Torvalds

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