Performance of RAID configuration

Posted on 2006-05-17
Last Modified: 2010-04-03
Brand-new server with dual Intel Xeon HT processors, 2GB of RAM, configure with Raid on Mother Board (ROMB) on Ultra320 SCSI channel with 128 iTBBU cache memory hook to hot-plug SCSI cage with four (4) Ultra320 Cheetah ST373207LC disks. The RAID configuration is RAID5: 1 array with 4 stripes, 64K stripe size. The OS is Windows 2003 Standard SP1, all drivers are up to date.

Now when we copy a folder of 6GB to another folder on the same server it takes 26 minutes to complete.
Is this normal?? This is in my opinion way to slow considering the configuration.

Can someone explain to me why it is that slow (if the amount of time is normal)???


Question by:MrAruba
    LVL 44

    Accepted Solution

    I was just running an HP NetRAID 4M with 160 MB/s transfer, and to copy a file that size would have taken about 3 minutes.  So YES, it is much too long.  But remember, if the data is coming from a drive which is not on the high-speed ultra SCSI RAID 5, that will be the bottleneck, not the RAID 5 writes.  Likewise for access over the wire, and especially if from something like a USB drive.  The xfer is no faster than the slowest link.
    LVL 8

    Assisted Solution

    One thought - has the raid arrays finished building?  Is write caching enabled?
    LVL 87

    Assisted Solution

    Use a command line utility (you can make batch files with it for automation) when you want to copy, this is much more reliable and usually also faster. Robocopy is part of the resource kit tools.

    Featured Post

    How your wiki can always stay up-to-date

    Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
    - Increase transparency
    - Onboard new hires faster
    - Access from mobile/offline

    Join & Write a Comment

    Sometimes the best way to deal with an infected computer is to boot from external media and run your tools from there.  The reason you may wish to do this really depends on the infection.  Some malware is so recalcitrant that no matter what you do i…
    Don't buy such-and-such disk drives, they are not reliable!    Boy, how many times have we read a post from a well-meaning person who had some bad experiences with a drive and now they exclaim the entire company's products can't be trusted.  First, …
    This video teaches viewers how to encrypt an external drive that requires a password to read and edit the drive. All tasks are done in Disk Utility. Plug in the external drive you wish to encrypt: Make sure all previous data on the drive has been …
    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…

    745 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

    Need Help in Real-Time?

    Connect with top rated Experts

    14 Experts available now in Live!

    Get 1:1 Help Now