Re: RAID performance

[Mike Woods]

Yui Sakazume wrote:
Hello,
I have installed FreeBSD-4.10 to NEC Express5800 120R.
I attached LSI Logic MegaRAID SATA 150-6 with six SATA disks.
And configure RAID 5 LUN.
But, I/O prformance is poor(about 5MB/s).
Is amr suitable for MegaRAID SATA 150-6 ?
Please tell me newfs parameters if there is recommendation.
 

Write operations on raid 5 take a massive performance hit, most 
controllers will try to compensate with caching
tricks but i suspect this could well be the cause of your problems.

--------------
Mike Woods
IT Technician
_______________________________________________
[EMAIL PROTECTED] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-questions
To unsubscribe, send any mail to "[EMAIL PROTECTED]"