On Thursday 30 October 2003 11:48, Selentek 24331-03 wrote:
> Hello,
>
> Where is 2 system on my computer: gentoo and redhat-9
>
> gentoo kernel: gentoo-sources without any changes
>
> gentoo $ mkisofs --version
> mkisofs 2.01a17 (i686-pc-linux-gnu)
>
> gentoo $ hdparm -t /dev/hda
> /dev/hda:
> Timing buffered disk reads: 52 MB in 3.08 seconds = 16.88 MB/sec
>
> gentoo $ time mkisofs distfiles > 1.1 2>/dev/null
> real 1m17.966s
> user 0m1.390s
> sys 0m14.745s
>
> I try different versions of cdrtools, but result same
>
> redhat: kernel from gentoo-sources without patches
>
> redhat $ mkisofs --version
> mkisofs 2.0 (i686-pc-linux-gnu)
>
> redhat $ hdparm -t /dev/hda
> /dev/hda:
> Timing buffered disk reads: 64 MB in 4.10 seconds = 15.61 MB/sec
>
> redhat $ time mkisofs distfiles > 1.1 2>/dev/null
> real 0m41.720s
> user 0m1.430s
> sys 0m12.510s
>
>
> What reason of gentoo small speed?
>
> Thanks.
I guess you had a dual-boot system, gentoo and redhat on the same drive at
the same time in different partitions. Harddisks usually have different
speeds at inner and outer sectors, which can vary upto a factor of two.
Additionally, fragmentation is an issue, especially on very large files like
iso-images (but it is far beyond the bad fragmentation behaviour of a fat
fs, but its noticeable)
Greetings,
Alex
--
Alexander Puchmayr
PGP/GPG-Key: http://puchmayr.linznet.at/private/alex_pubkey.asc
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