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ESXi 4.1 extend datastore

Posted on 2011-10-15
Medium Priority
Last Modified: 2012-05-12
We have a HP ML350 G6 with a P410i RAID controller with 512MB battery cache with 7 disk of 146GB attached configured in RAID5 which gives us a total of +/- 819GB usable space.

Because we were running out of space i added another disk of 146GB to the server and extended the RAID5. I took a while to complete the extend which resulted in very slow performance.

Before the extend i had a datastore of 819GB with +/- 5GB of free space. After the extend i have a datastore of 820GB with +/- 1GB free space.

How in the hell can this be?

Plz help!!
Question by:FlipTrip
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LVL 124
ID: 36973079
Although you have expanded the Array, did you also Expand the Logicxal Drive using the Array Configuration Utilities.

Once, you complete both, you also need to Increase the Datastore VMFS Partition in ESX using the Increase Option.

Select the datastore, and click properties, and Select Increase, and select the remaining space.
LVL 124
ID: 36973086
It's also normal for RAID expansion to take a long time, and reduce performance whilst it's occuring.

LVL 124
ID: 36973089
A word of warning here, it you have installed ESXi 4.1 onto the existing RAID 5 Array, e.g. both ESXi 4.1 OS and VMFS partition share the same RAID 5 Array, you MAY NOT be able to expand the VMFS partition, which is due to a 4 Primary Partition Limit on a disk (this is not a VMware limitation).
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Author Comment

ID: 36973090
damn, that's probably it then. I expanded the raid but not the logical drive. I'll check this as soon as possible.

I let you know.

thx for the quick reply.
LVL 124

Accepted Solution

Andrew Hancock (VMware vExpert / EE MVE^2) earned 2000 total points
ID: 36973094
You need to do three things.

1. Expand Array - Tick
2. Expand Logical Drive - not done
3. Expand VMFS Partition - not done.

It is not an automatic thing, to Expand the Array, and Expect the datastore inside ESXi to also be Expanded!

(be warned, it may not be possible!)

Author Closing Comment

ID: 37036373
thx for the quick respond and clear answer.

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