Subject: RAID Performance
To: None <netbsd-help@netbsd.org>
From: Timothy E. Denehy <tedenehy@cs.wisc.edu>
List: netbsd-help
Date: 01/24/2002 16:14:35
I have a 4 disk RAID 0 array in which each disk runs at approximately 20 MB/s.
I've tried a number of different configurations (changing both stripe unit and
block size), but the maximum sequential write throughput I can get from the
array is only 31 MB/s.  Could I be doing something wrong, or is this just a
raidframe limitation?  My best configuration is listed below.

Thanks in advance,

Timothy E. Denehy


# Best configuration, with 64K blocks
START array
# numRow numCol numSpare
1 4 0

START disks
/dev/sd2e
/dev/sd6e
/dev/sd4e
/dev/sd8e

START layout
1024 1 1 0

START queue
fifo 100