Re: hard disk performance on Allnet 6500 (like Thecus N2100)
* Oliver Kiddle <okiddle@yahoo.co.uk> [2007-07-11 11:27]:
> After installing Debian, I've found that the disc speed as reported by
> hdparm has gone down. Before, I was getting:
...
> Whereas now I get:
> Timing cached reads: 60 MB in 2.00 seconds = 29.95 MB/sec
> Timing buffered disk reads: 60 MB in 3.07 seconds = 19.53 MB/sec
Apologies for not answering your message back in July. Paul Fryer
recently made me aware of that problem again and I looked at it today.
First of all, I see about the same peformance as you do. Second, I
tried two tests with 2.6.22 to see what might make a difference but I
couldn't increase the performance:
- First, I reverted that R_ERR on DMA activate FIS errata fix which
you noticed in dmesg. Reverting this fix does not increase
performance.
- Second, I applied Intel's IOP patches from SourceForge but again
they didn't help.
So I'm not quite sure why Debian with a modern kernel is much slower
to whatever Thecus' firmware was using. If anyone else has any good
ideas I'd love to hear them.
--
Martin Michlmayr
http://www.cyrius.com/
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