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Avg. Disk queue length


New Member
After doing a check on the health and performances of my comp,

the program gives me a red flag for the Avg Disk Queue Lengh with a average of 2, minimum of 1 and a max of 6

I have Western Digital Caviar RE 320 Gb * 3 raid 5 (so good and fast disks)

they are only 1/32 full so lots of room, the disk is defragged, all temps files are binned

As you can see by my comp details I have a good setup, so why do I have such bad readings ???

any help would be helpful

My Computer


Ken Blake, MVP

On Tue, 1 Jul 2008 07:06:19 -0500, shazbot <guest@xxxxxx-email.com>

> after reading up, it seems that if I transfert my raid 5 to a raid 1 or
> 0 setup it might makes things faster

That's a very strange question. RAID 0 and RAID 1 are completely
different and used for very different purposes. To think of them as
alternatives is certainly very odd.

RAID 0, in theory, will speed up the computer over no RAID, but in
practice, it usually does so so little as to be unnoticeable.
Considering that it also greatly increases the risk to your data, I
recommend against it.

I don't know anything about the relative speeds of RAID 1 and RAID 5.

RAID 1, as I said, is completely different. It's mirroring, used for
redundancy, not performance.

> EVGA 132-CK-NF780-A1, BIOS 05
> Intel X6800@xxxxxx
> Video Asus EN8800GTX
> Western Digital Caviar RE 320 Gb * 3 raid 5
> Western Digital Caviar RE 250 Gb * 1
> Hitachi Deskstar 7K1000 1 To * 1
> G-Skill F2-8000CL5D-4GBPQ (2GB x 2) now not used
> Corsair 2x4096 - 8500C5DF
> Monitor SyncMaster 930B(Digital)* 2
> Antec Truepower Quattro 850 power supply
> Vista Business 64bit
> Noctua NH-U12P
> Case Cooler Master Cosmos 1000
> Azuntech X-Fi Prelude sound card
> Steelpad keyboard, Logitech G5 Mouse
Ken Blake, Microsoft MVP - Windows Desktop Experience
Please Reply to the Newsgroup

My Computer


New Member

well it was the raid 5 that was the culprit

Raid 5 is far more complex than 0 or 1 and fore on-board cards, changing my set-up back to raid 0 solved the problem straight away,

I can actually see the difference as just opening HD and windows is far faster

I think that I shall order a raid car and play around some more,

Raid 5 I'm sure will work better on a Raid card and I will get better band with thru a card than on the MB, therefore getting even better transfer rates :)

My Computer




When I do a system health check I get the following information/message
"Average disk queue length is 3. The disk may be at its maximum transfer
capacity due to throughput and disk seeks"

What does this mean and what do iI do about it. I'm not even sure which
disc it is referring to, I have 2 internal drives and 3 external drives.

Thanks for your help.

My Computer


New Member
if I understood all of it correctly it basically means that this is a traffic jam while reading writing to the hard disc, that why you see sometimes the little blue ring in vista going around as its thinking

Have you only one HD, or do you have a raid set-up ?, as you didn't post your sig so we don't know your set-up

My Computer

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