On 29 Dec, Chuck McManis wrote:

> To test it I try dd if=/dev/zero 
> of=zero.file bs=512 count=5242880 (create a 10MB file of zeros) I finally 
> kill it after it has written about half and dd reports 94651 bytes/second 
Try again with a biger block size. Say 32k, 128k or 1024k. I noticed
that really small blok sizes like 512 bytes can be horribly slow. 
I tested a Dilog SQ706A with a 650MB SCSI Fujitsu, a Dilog DQ686 with
320MB ESDI Micropolis and a QD33 with two 9" 940MB SMD drives. All of
this controllers gave me about 800k/s on a MVII with blok sizes around
50k to 100k. Bigger block sizes are a bit slower, smaller block sizes
are significant slower. 
-- 



tschuess,
          Jochen

Homepage: http://www.unixag-kl.fh-kl.de/~jkunz