Perc 5/i SAS

[moda <moda%sdnet.info@localhost>]

Hello,

I made a simple test with a 1950 server and Perc 5/i SAS Raid Controler


NetBSD 5.1.2 x64 = 10MB/s

iostat output :

 tin tout  KB/t  t/s  MB/s   KB/t  t/s  MB/s  us ni sy in id
   0   61  0.00    0  0.00  63.36  223 13.78   0  0  1  0 99
   0  184  0.00    0  0.00  63.58  224 13.89   0  0  2  0 98
   0   61  0.00    0  0.00  64.00  216 13.49   0  0  2  0 98
   0   61  0.00    0  0.00  64.00  223 13.92   0  0  1  0 99

# time dd if=/dev/zero of=/tmp/16g bs=65536 count=262144
^C5755+0 records in
5754+0 records out



-------------------------------------------------------
OpenBSD 5.1 x64  = 114MB/s

 tin tout  KB/t  t/s  MB/s   KB/t  t/s  MB/s  us ni sy in id
   0   61  0.00    0  0.00  63.36  223 114.78   0  0  1  0 99
   0  184  0.00    0  0.00  63.58  224 114.89   0  0  2  0 98
   0   61  0.00    0  0.00  64.00  216 114.49   0  0  2  0 98
   0   61  0.00    0  0.00  64.00  223 114.92   0  0  1  0 99

# time dd if=/dev/zero of=/tmp/16g bs=65536 count=262144
^C5755+0 records in
5754+0 records out

Disk performance are so different that i don't understand.

Do i miss something with the Raid and NetBSD ?