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raptor RAID 0 XP defrag reduces performance?!?

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July 13, 2003 11:37:36 PM

Help anyone who can. I built system and was getting good sandra scores (60000 to 69000). I had OS on the RAID of course. I installed programs (rebooted many times) and still got same performance. Then I did a defrag from windows, rebooted, and when I ran sandra again, performance dropped to 44000. 44000!!!!!!!! I ran the benchmark several times and I keep getting the same result. I've reinstalled and reformatted several times, and after a while (I think after scandisk or defrag), my performance makes this huge drop. Anyone have any experience with that or any advice?

thanks,

Brad

P4 2.4C @ 2.9 (right now)
Asus P4P800 Deluxe (mem@320 ie 5/4 ratio)
2 Raptors RAID 0
512MB Corsair XMS 3700 3-4-4-8
other yucky stuff<P ID="edit"><FONT SIZE=-1><EM>Edited by heislord55 on 07/19/03 02:41 PM.</EM></FONT></P>
July 14, 2003 4:40:35 PM

my sandra scored down to avout 34000. This freakin sucks.

P4 2.4C @ 2.9 (right now)
Asus P4P800 Deluxe (mem@320 ie 5/4 ratio)
2 Raptors RAID 0
512MB Corsair XMS 3700 3-4-4-8
other yucky stuff<P ID="edit"><FONT SIZE=-1><EM>Edited by heislord55 on 07/19/03 02:41 PM.</EM></FONT></P>
July 14, 2003 5:45:30 PM

I noticed the same thing. I didn't worry too much about it. I'm kind of curious why this happens. Maybe try a third party defragmentor like the one that comes with norton utilities.
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July 15, 2003 5:21:18 PM

Even with Norton defrag, results not consistent. It appears that unless you drive is constantly defragged, you lose most of the performance increase.

P4 2.4C @ 3.01
Asus P4P800 Deluxe (mem@320 ie 5/4 ratio)
2 Raptors RAID 0
512MB Corsair XMS 3700 3-4-4-8
other yucky stuff
July 19, 2003 6:40:09 PM

Norton Defrag does get scores closer to fresh install. About 61000 right after defrag and 2 reboots. I guess I'm satisfied.

P4 2.4C @ 3.01
Asus P4P800 Deluxe (mem@320 ie 5/4 ratio)
2 Raptors RAID 0
512MB Corsair XMS 3700 3-4-4-8
other yucky stuff
July 25, 2003 7:58:52 PM

Ive had my dual raptor raid 0 running for about a month now and have defragged twice using XP's built in one.

I've run sandra and ATTO, both are giving me scores about 80% of what I got before but I guess this is because I've now got the drives half filled - therefore I would say all is well with mine.

Sandra is giving me 59000 now, 69000 before. ATTO is giving me 80MB/s read/write now, 100MB/s before.

btw, I used 64k chunk size and 64 cluster size with NTFS. although this wastes a bit of drive space it should actually reduce fragmenting as fewer clusters are used.

<b>Vorsprung durch Dontwerk</b>.....<i>as they say at VIA</i>
August 2, 2003 4:23:32 PM

USe a good defragmentor. Forget that speed disk ftom norton utilities. The best defragmenting tool which I found is Diskeeper Workstation edition from Executive software. It increased my points in sandra arter boot time defrag and 4 consecutive defrags
August 2, 2003 6:03:37 PM

yes, diskeeper is very good. YOu can use boot time defraging to defrag the mft and page files.
August 2, 2003 8:35:07 PM

Interesting, id diskeeper a downloadable?
August 2, 2003 10:20:44 PM

there is a free trial version at executive.com, and you need to fill out a form to download it.
!