storage spaces expand vdisk with one disk

Posted on 2014-02-12
Medium Priority
Last Modified: 2014-02-14
I am running Storage Spaces "parity" on my server 2012R2 with 9x 2TB hard drives.

Now i need more Space and i have added one more disk and added it to the Storage Pool.
Now i want to Extend my Virtual Disk, but that opportunity is greyed out.

I've have read on the net that i need to add the same number of discs as i allready have in the Storage Pool to expand the Vdisk.

But i need the opportunity to just add one disk at the time as it is nessary.

Any help is appreciated
Question by:Montesdatasystemer
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Expert Comment

by:Cliff Galiher
ID: 39854331
That is a decision you have to make when you create the storage space
(not the pool.) Once created, it cannot be changed. Your only choice now would be to back up the data on the space, delete the space, and recreate it. And with parity, when all the disks are the same size, it is almost impossible to add a single drive because it needs access to *at least* a second drive to write the parity data. Spaces does not rebalance and redistribute already written data to accomodate this scenario. For such environments, mirroring is a better choice.

Author Comment

ID: 39855641
Okay. as i understand on what you are writing this isnt possible to expand with only one disk in Parity.
If i choose Mirror is it possible then to expand with one disk at the time?

LVL 61

Expert Comment

by:Cliff Galiher
ID: 39856699
The only guaranteed way to expand by one disk at a time is to create a simple space with a column size of 1. Any other configuration has the potential to require multiple disks.

Author Comment

ID: 39858737
Thanks for your answer.

And if i choose Simple Space i will have no security as in a raid am i right?
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Accepted Solution

Cliff Galiher earned 1200 total points
ID: 39858781

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