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August 5th, 2012 04:00

adding an additional raid 0 to an existing storage array already configured with raid 1 and raid 10

Hi everyone.

This is a bit beyond my scope of expertise, and any assistance will be greatly appreciated.

We have a dell poweredge 2950 with a disk array. The dell has 2 x disks configured in raid 1, and an external disk array where 4 drives are in raid 1 and 4 drives in raid 10. I have added an additional 3 drives to the array that I want configured in raid 0.

This is where the problem comes in. I have set up new raid configs from scratch, but adding new discs now has me scared that i am going to mess up my current config. The dell server has the Dell Modular Disk Storage Manager installed, but it wants me to rename it.

Please, if anyone could point me in the right direction.

Thanks

J

4 Operator

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9.3K Posts

August 5th, 2012 13:00

Note: are you sure you want raid 0? Raid 0 is fast, but has no redundancy; so if ever just a single drive fails, you lost the data on all 3 drives. Did you mean to select raid 5 maybe? Raid 5 uses parity, but you do get slower writes and lose the equivalent of 1 harddrive in space to the parity.

The fact that you have the Dell Modular Disk Storage Manager tells me that your external storage is an MD3000, MD3200 or MD3600 series SAN array.

Once you created the raid set, you create the virtual disk. Now you have to 'map' this virtual disk to the server. None of this should ask to 'rename' anything, however, it does ask you to name it (cannot be left blank and defaults to a number). Once the disk is mapped to the server you rescan in device manager for hardware changes (this assumes it's a Windows server), and then go to disk management. Now you should see the disk and be able to partition and format this disk.

44 Posts

August 6th, 2012 00:00

Hi there,

Firstly, great advice from DevMgr!

Creating and setting up a new array with the new disks should not have any affect to your existing configurations, using the MDSM software it should be fairly straight forward once you've decided which RAID level to go with. As mentioned by DevMgr, do take note of the risks when using a RAID 0 array, losing any of the disks could mean permanent data loss !

Thanks.

DC Lim

Dell | Social Outreach Services - Enterprise

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6 Posts

August 6th, 2012 00:00

Hi Dev Mgr,

Many thanks for your reply. Firstly, yes I need the speed. And it will only be carrying a backup of the data. I will give it another try, and let you know what the outcome is.

Thanks again for the advise.

Best regards

Jesse

6 Posts

August 6th, 2012 00:00

Hi DC Lim,

Thanks for your reply. I will try this again, and hopefully not lose any data in the process.

6 Posts

August 6th, 2012 05:00

Hi All,

Well I have had a look, and the documentation I can find really does not help me. I am gonna bite the bullet, and get a dell techie onsite to do this setup for me.

Thanks to all who responded.

All the best

Jes

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