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05.09.2008 at 07:52AM PDT, ID: 23389545
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Adding more disks to the SAN

Tags: EMC, Navisphere Express, 6.20.0.3.12, AX150SC, Dell, EMC SAN, AX150SC
My company has an EMC SAN device - AX150SC installed using 5 harddrives. We are out of space and I just ordered and received 7 more drives to fill the bays to give me about an additional 1 TB of usable space.  I am unable to locate any documentation on best practices to add these drives. I prefer limited/no down time and prefer not to lose any data.

We will be doing this maintenance on Monday after our Full backups complete this weekend to minimize the risk of losing data. When I login to Navisphere on the AX150SC, I can view where to expand the current disk pool and add an additonal disk pool. I would prefer to expand the current disk pool to allow me to use the additonal drives on shares I have already setup. My concern here is the time to it may take to write the existing data to the new disks over the RAID 5 set. Will this create an outage? If so, how long? If not an outage, will it create a degradation of services to the current data?

My other option is to create a new disk pool , create new shares, move some data around, and update user profiles. As you can tell this option will require more work, but seems a little safer to me.

So my fellow gurus, what do you advise me to do? Has anyone done an upgrade on an AX150SC before? Does anyone have some links they can send me to for best practices to perform this disk upgrade?

Thanx for your help.
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Question Stats
Zone: Computer Hardware
Question Asked By: marine7275
Solution Provided By: meyersd
Participating Experts: 1
Solution Grade: A
Views: 8
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05.09.2008 at 09:37PM PDT, ID: 21537871

Rank: Master

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05.12.2008 at 07:48AM PDT, ID: 21547448

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05.09.2008 at 09:37PM PDT, ID: 21537871

Rank: Master

You can plug then new discs in live with zero downtime. The AX150 will see the new discs after about 3-ish minutes (it varies as the spin-up delay is generated from the disc ID so it can be short or it can be long). Once you can see the new discs in Navisphere, you can create a new disk pool, create LUNs and assign them to servers.

Again, you can do all this without an outage.
Accepted Solution
 
05.12.2008 at 07:48AM PDT, ID: 21547448
 
 
20080236-EE-VQP-29 / EE_QW_2_20070628