Dell PercH700 Raid Controller in a T410 Box

Posted on 2011-05-12
Last Modified: 2012-05-11
I have as is RAID 1
300GB drive twice

I am out of space and need to expand.

If I add another 300GB drive , wont I have to go to RAID 5 ?

Does anyone know if it is safe and easy to use the boot up Ctrl-S to get into the RAID manager and make a change like this.

I am just nervous because this is a production machine.
Question by:bhamguy3131
    LVL 87

    Expert Comment

    Yes, you would have to migrate to RAID 5. As this controller supports migration from RAID 1 to RAID 5, it should be safe, but it is still important that you have at least one known good backup before you start, and you should also first make sure you have installed the newest firmware on the controller and also for the PC's BIOS.
    LVL 16

    Expert Comment

    i think its not possible and can lead you to disaster.

    1) you will loss all you data
    2) your current raid is Raid 1, once you change raid to Raid 5 the current configuration on raid will flush automatically.

    you can add 3 more 300GB HDD into your server, create separate Raid 5, transfer your things from your current full volume to new volume. or
    you can add 2 more 300GB HDD into your server, create separate Raid 1, transfer your things from your current full volume to new volume.

    i recommend you don't delete or modify existing Raid.

    LVL 5

    Expert Comment

    If you have openmanage server administrator installed, you can do this online by logging in to openmanage, clicking on the storage tab, clicking on the virtual disk and selecting reconfigure from the dropdown menu.

    Whilst this is rebuilding (a considerable amount of time - overnight/weekend), the performance of your system will be significantly degraded.

    This is a solution Dell will support if you call them. I completely understand people who are not comfortable with this.
    LVL 46

    Expert Comment

    Deep down in the bowels of the documentation, you'll find that online expansion from RAID1->RAID5 is supported.  You'll also find where it tells you that best practice is to backup first.
    You should make sure that patrol operations are enabled and that it did a consistency check before you start. This insures that NEITHER disk has any bad/unreadable blocks and every block (other than the metadata matches).

    If you do not have the battery backup option then buy that first. This covers you in event of either a drive failure in the middle of the process, or power failure. (It also may even be a prerequisite for expansion, can't remember .. so look it up).  Besides, the battery backup for cache will immensely speed up writes.

    Author Comment

    Hey I was wrong.

    We are RAID 5 now at 3 , 146GB drives.

    I plan to order 2 more 146 at same RPM speed and they are indeed hot swappable.

    So , do I add them with machine on or off  ??

    Once I add them , what do I do to get the RAID array to initiate a processing of the new drives  ??

    I dont think I have ever used Dell Open Manage but I guess I can install this if it is the easiest way to do this.

    I want something easy I cant mess up .
    LVL 14

    Accepted Solution

    The H700 fully supports the migration from a 2 disk Raid 1 to a 3 Disk Raid 5. This is extremely safe and should be performed within Open Manage Server Administrator

    Check out this video
    How to reconfigure an array using OpenManage Storage Services
    LVL 38

    Expert Comment

    by:Philip Elder
    What we would do:

    Back up using SBS backup.
    Change all drives for 300GB 15K SAS.
    Restore System partition to increased volume.
    Restore Swap Partition (we run a separate one).
    Restore Data partition to the balance.

    This gives the RAID controller the opportunity to write the configuration to the new disks properly.

    We crash and restore all of our production servers just prior to deploying them into production to verify the backup and media.

    LVL 5

    Expert Comment

    Thanks. :(

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Save on storage to protect fatherhood memories

    You're the dad who has everything. This Father's Day, make sure your family memories are protected. My Passport Ultra has automatic backup and password protection to keep your cherished photos and videos safe. With up to 3TB, you have plenty of room to hold the adventures ahead.

    More or less everybody in the IT market understands the basics of Networking, however when we start talking about Storage Networks, things get a bit dizzier, and this is where I would like to help.
    Moving your enterprise fax infrastructure from in-house fax machines and servers to the cloud makes sense — from both an efficiency and productivity standpoint. But does migrating to a cloud fax solution mean you will no longer be able to send or re…
    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…

    779 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

    11 Experts available now in Live!

    Get 1:1 Help Now