how much power do you need for software raid 5 under windows 2003 server

Posted on 2006-04-19
Medium Priority
Last Modified: 2010-04-03
im working on a new server for a client who needs alot of storage, right now the system is a dell Precision workstation 420 with dual 1Ghz Cpu's 768 rambuss memory 2 9.1gb 10k scsi boot drives mirrored under windows and 9 ide Maxtor 250GB drives under sw Raid5, im getting very poor performance, reads of ~5mb and it seams to stop when trying to copy over 3 gb of data, the throuput just seams to drop off to around 10KB after transferring afue gig... i was wondering if it was a HW problem, how much power do i need to run SW raid effectively. FYI dont really have the money for HW raid card but  i was looking at the megaraid i4 tho.

Question by:donickco
  • 3

Accepted Solution

shankshank earned 500 total points
ID: 16489974
In my opinion and experience, it's not worth the money for SW raid. I know that's now what you hear, but that is just how I see it. The poor performance you see, well that is just the result of using SW raid.

heres a small reading on hardware and software raid


Expert Comment

ID: 16490845
I agree.  SW raid historically gives poor performance, particularly on writes.  With that said, here's a great calculator for figuring out what power requirements you have:


I would be VERY worried about 9 Maxtor drives under SW raid.  Maxtors don't have a history of long running (life).  If you lose a drive, adding a new one to rebuild in Raid V will completely cripple the server until the rebuild is done, which might be OK, but don't expect it to be a quick process..

Expert Comment

ID: 16490911
Careful with the raid cards.  They can use various numbers of drives.  Some are 4 drives, some 6, I know of a good Highpoint that holds 8.


This LSI is a little more pricey but gets you 40 devices



Author Comment

ID: 16493370
ll the drives are IDE ATA 133 ata 100 will be fine tho

Assisted Solution

jdietrich earned 500 total points
ID: 16498165
OOPS!  Sorry, thought I read SATA, not ATA.  Here's the best one for ATA (It is 133)


The highpoint is the only Raid ATA card I know of that supports 8 drives.  It is a steal at $89.  8 is OK, you would keep #9 as the spare incase one blows, which tends to happen with Maxtors.....

Featured Post

[Webinar] Cloud and Mobile-First Strategy

Maybe you’ve fully adopted the cloud since the beginning. Or maybe you started with on-prem resources but are pursuing a “cloud and mobile first” strategy. Getting to that end state has its challenges. Discover how to build out a 100% cloud and mobile IT strategy in this webinar.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

How to update Firmware and Bios in Dell Equalogic PS6000 Arrays and Hard Disks firmware update.
Is your phone running out of space to hold pictures?  This article will show you quick tips on how to solve this problem.
This tutorial will walk an individual through the process of installing the necessary services and then configuring a Windows Server 2012 system as an iSCSI target. To install the necessary roles, go to Server Manager, and select Add Roles and Featu…
Despite its rising prevalence in the business world, "the cloud" is still misunderstood. Some companies still believe common misconceptions about lack of security in cloud solutions and many misuses of cloud storage options still occur every day. …
Suggested Courses
Course of the Month16 days, 19 hours left to enroll

862 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question