raptor RAID 0 XP defrag reduces performance?!?

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>
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More about raptor raid defrag reduces performance
  1. 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>
  2. 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.
  3. 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
  4. 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
  5. 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>
  6. 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
  7. yes, diskeeper is very good. YOu can use boot time defraging to defrag the mft and page files.
  8. Interesting, id diskeeper a downloadable?
  9. there is a free trial version at executive.com, and you need to fill out a form to download it.
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