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6 Posts
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1606
July 9th, 2012 04:00
Same disks, different user capacities
Hi there,
I have one VNXe with 12 600GB SAS disks. All disks are identical.
In Unisphere, all disks show a 536GB raw capacity, but the user capacity is not the same for all.
The first 6 disks have a user capacity is 488.587, while the other 6 have and 536.777.
Is this normal?
Thanks.
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DynaDin
138 Posts
0
July 9th, 2012 05:00
Please refer to this knowledgebase article - (emc291999)
Why do I see different a disk size for first five disks in a VNXe DPE?
nicolasm1
5 Posts
0
July 9th, 2012 05:00
Hi,
The first 6 disks host the OS of VNXE (othername flair).
It is localised on HIDDEN LUN and we can make anything on this
It's a little bit greedy .... (536.777 - 488.587) X 5 = 240.95 GB
Hope this help
Vipin VK
2 Intern
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812 Posts
0
July 9th, 2012 05:00
Hi,
Can you confirm this space issue is there in 6 disks or 4 ?
Vipin V.K
nicolasm1
5 Posts
0
July 9th, 2012 05:00
On the first raid group of 6disk (5+1 spare)
ricdanger1
6 Posts
0
July 9th, 2012 05:00
Six.
Vipin VK
2 Intern
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812 Posts
0
July 10th, 2012 00:00
VNXe uses first 4 disks for system purposes, but due to the raid group design this happens for 5th and 6th drives as mentioned in the primus mentioned by Dinesh KR.
RRR
6 Operator
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5.7K Posts
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July 10th, 2012 03:00
exactly as I said
RRR
6 Operator
•
5.7K Posts
1
July 10th, 2012 03:00
please don't refer to the 5+1 as being 5 + 1 spare, since this 1 is not a spare! The 1 is for parity!!! A spare is a hot spare and that means that when a disk fails, an available hot spare will start rebuilding the missing data from the remaining data and parity drives! There's a difference!
nicolasm1
5 Posts
1
July 10th, 2012 03:00
in case of 6 disks
the Truth is (4+1)+1
the first 1 is parity
the second is a hotspare if you want