Re: 3Ware 9500S-12 RAID controller -- poor performance

From: Dr. David Alan Gilbert
Date: Mon Oct 10 2005 - 05:54:47 EST

* subbie subbie (subbie_subbie@xxxxxxxxx) wrote:
> OK,
> I now dumped RAID5 and am running all of my 12 disks
> separately each partitioned with XFS.
> I did a very crude test of reading a single 1GB file
> from each of my disks in parallel by putting 12 dd
> processes into the background. Each file was read at
> approximately 35MB/s giving an aggragate of a little
> over 400MB/s. According to 3Ware support, 400MB/s is
> the "theoretical maximum" of this controller. I'm
> very happy with these results.

Nice. Have you tried Software RAID5 on top of that?
I would be very interested to know how software RAID5
goes relative to the 3Ware hardware.

-----Open up your eyes, open up your mind, open up your code -------
/ Dr. David Alan Gilbert | Running GNU/Linux on Alpha,68K| Happy \
\ gro.gilbert @ | MIPS,x86,ARM,SPARC,PPC & HPPA | In Hex /
\ _________________________|_____ |_______/
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at