SATA Raid (stress test..)

[Beastie]

Beastie wrote:

> Beastie wrote:
>
>> Robert Uzzi wrote:
>>
>>> That still dosen't connedt SATA to a non sata board though. That's my
>>> situation I have 6 SATA drives but no SATA native board. Looking for a
>>> cheap addin card to build this upon.
>>>
>>>  
>>>
>>>  
>>>
>> I'll buy Intel SRCS16 (500$) this week, will talk to u later about 
>> it's compatibility and performance for RAID 5 with 4 SATA drive.
>>
>> regards
>> reza
>>
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>
> FreeBSD-6.0 known this device. (Intel SE7320 EP2)
> ---snip--
> amrd0: <LSILogic MegaRAID logical drive> on amr0
> amrd0: 1430511MB (2929686528 sectors) RAID 5 (optimal)
> ar0: 76228MB <LSILogic v3 MegaRAID RAID1> status: READY
> ar0: disk0 READY (master) using ad4 at ata2-master
> ar0: disk1 READY (mirror) using ad6 at ata3-master
> ---snap---
>
> System now work with RAID
>
> df -h
> Filesystem       Size    Used   Avail Capacity  Mounted on
> /dev/ar0s1a      496M     55M    401M    12%    /
> devfs            1.0K    1.0K      0B   100%    /dev
> /dev/ar0s1d      496M     12K    456M     0%    /tmp
> /dev/ar0s1e       67G    419M     61G     1%    /usr
> /dev/amrd0s1d    1.3T     12M    1.2T     0%    /var
> /dev/acd0        651M    651M      0B   100%    /cdrom
>
>
> My questiin is now, how do i  test SATA RAID performance ?
> Is there any tools or program to do some benchmark ?
>
> please help me...
>
> regards
> reza
>
>
>
I try to test with dd simple command

 dd if=/dev/amrd0s1d of=/dev/null
^C31297+0 records in
31297+0 records out
16024064 bytes transferred in 7.970548 secs (2010409 bytes/sec)

the result is very slow performance (-+ 2 Mbytes/sec), with write cache 
enable on drive. :(

regards
reza