Tape backup performance on 386 ISA/EISA systems
Conor P. Cahill
cpcahil at virtech.uucp
Sun Jun 10 21:49:34 AEST 1990
In article <1123 at sixhub.UUCP> davidsen at sixhub.UUCP (bill davidsen) writes:
> As I noted before, that was a typo, the low (fragmented) rate was
>300KB/min (not /sec), when the disk is not fragmented and the tape
>streams the rate is 4MB/min (there I typed it right twice).
The only reason I could see for this kind of difference is that you are
using backup software that does not have a large tape buffer (i.e. tar).
Using a tape backup archiver with large buffers (like cpio -C 102400)
will negate most of the effect of a fragmented disk on tape streaming.
--
Conor P. Cahill (703)430-9247 Virtual Technologies, Inc.,
uunet!virtech!cpcahil 46030 Manekin Plaza, Suite 160
Sterling, VA 22170
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