Simon Burge wrote:
> 
> Andrea Franceschini wrote:
> 
> > On raid5 Partition :
> >
> >               -------Sequential Output-------- ---Sequential Input-- --Random--
> >               -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
> > Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
> >           100  2504 15.4  2468  6.8  2749  7.8 21473 93.2 86272 99.9 2311.4 27.9
> >                ^^^^
> > On non-raid partition :
> >
> > Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
> >           100 12802 96.0 15757 74.2 15847 73.0 23237 99.9 86406 100.0 8523.6 100.1
> >               ^^^^^
> > [ ... ]
> >
> > NetBSD 1.5R (NETAPP) #1: Thu Feb  8 05:29:20 UTC 2001
> >     root@netapp:/usr/src/sys/arch/i386/compile/NETAPP
> > cpu0: AMD K6-2 (586-class), 501.16 MHz
> > cpu0: features 8021bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8>
> > cpu0: features 8021bf<PGE,MMX>
> > total memory = 255 MB
> > avail memory = 234 MB
> > using 3296 buffers containing 13184 KB of memory
> 
> One quick comment - it's no use testing disk I/O with bonnie if you are
> testing a file size less than the buffer cache size.  That's why you are
> seeing 80MB/s in some cases.  With -current and a box with 256MB of RAM,
> you'd be wanting to use a 256MB test as an absolute minimum - larger
> would be better.
> 
> The "using 3296 buffers containing 13184 KB of memory" line refers to
> buffers for metadata - things like inode info and so on.  Buffers for
> actual file data use (pretty much) any free memory of your 234MB.
> 
Thanks for the comments.

Yes, i know that bonnie wasn't such a good tool for disk speed
benchmark,but as you can
argue from my post,the problem is focused on write speed.

I don't know if it is a speed issue at all.... i mean ... the loss of
speed  was a
conseguence of something else .....a raidframe problem for istance..

Someone has a similar configuration (4-IDE/RAID5)?It works?

> Simon.
> --
> Simon Burge                            <simonb@wasabisystems.com>
> NetBSD CDs, Support and Service:    http://www.wasabisystems.com/

Bye!