From owner-freebsd-hardware@FreeBSD.ORG  Thu May 17 07:14:45 2007
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Date: Thu, 17 May 2007 14:14:42 +0700 (ICT)
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From: Olivier Nicole <on@cs.ait.ac.th>
To: thwang@mail.nhcue.edu.tw
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	(biogary@gmail.com)
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Cc: freebsd-hardware@freebsd.org
Subject: Re: messages from dmesg -- (HP ProLiant DL380 G5)
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Hi,

> *I can setup FreeBSD 6.2R successfully and everything is OK. *
> *However, I found that there is an amazing message in the dmesg:*
> 
> *ciss0: <HP Smart Array P400> port 0x4000-0x40ff mem
> 0xfde00000-0xfdefffff,0xfddf
> 0000-0xfddf0fff irq 18 at device 0.0 on pci6
> ciss0: [GIANT-LOCKED]*
> 
> *--->**Smart Array P400 is activated by ciss0 successfully*
> 
> *da0 at ciss0 bus 0 target 0 lun 0
> da0: <COMPAQ RAID 5  VOLUME OK> Fixed Direct Access SCSI-0 device
> da0: 135.168MB/s transfers
> da0: 419946MB (860051248 512 byte sectors: 255H 32S/T 65535C)*

Just a wild guess, but if you set-up your disks to be organised into
RAID 5 (that is one big disk) it sounds logic that all you can see is
one big disk.

As for the speed, RAID 5 is not optimized for speed but for
reliability while preserving a low ratio of parity vs. data disk.

If you are interested with more speed, you may have to select another
RAID agregation (this morning I found
http://www.acnc.com/04_01_00.html that shows good comparison for every
RAID config).

Best regards,

Olivier