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vmfs partition on raid 5 bigger then 2Tb

Hi,

Is it possible to create multiple luns on a raid 5 of 4x1Tb disks? What I want is just 1 TB lun size for the vm's and 2TB raw to be used as a drive for a linux vm.

The controller is a smartarray 200i 128Mb.
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BELRpR
Asked:
BELRpR
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2 Solutions
 
ryder0707Commented:
Why not vmfs volume size is up to 64TB, but take note max file size depends on block size, best to format with 8MB block size so max file size on the volume is 2TB, in other words max vmdk for each VM virtual disk cant exceed 2TB

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DavidPresidentCommented:
Not all RAID controllers can deal with LUNS > 2TBs (the magic number if you have FFFFFFFFx blocks is more like 2.09TB).   And some controllers only handle them properly with firmware updates, and only using certain host operating systems and drivers.

Best thing to do is check release notes for the firmware revision and see if it is supported. Some SMARTArray controllers cap out at the 2TB limit, and HP never released firmware updates for all of the legacy controllers to get around the limit.
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ryder0707Commented:
I did check that as well
Up to 4.5TB of total storage with 6 x 750GB
Check out http://www.topbiz.fr/file_prod/doc/SAE200.pdf
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DavidPresidentCommented:
Well, then the answer is Y, you can do it.
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BELRpRAuthor Commented:
The problem is when my raid volume is bigger then 2TB then vmware doesn't see the volume!
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ryder0707Commented:
Do you mean during installation or after installation? Try creating the larger datastore after esx is installed
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BELRpRAuthor Commented:
The problem is like this:

I have installed esxi 4.0 on a 2Gb memroy stick on a hp ml350G5.

On the smartarray e200i 128Mb are 6 disks:
2x 72GB 15000rpm
4x 1TB 7200rpm (Raid 5)

The problem is esx don't see the raid 5 volume which would be 3TB.
If I uses a raid 10 esxi sees the volume perfectly.

Basicly my question is:
Can I create 2 paritions on the raid 5. One of 1TB and 2TB which won't be a datastore but givin directly to a vm.
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ryder0707Commented:
Can you go to the esxi console http://www.virtualizationadmin.com/articles-tutorials/vmware-esx-articles/general/how-to-access-the-vmware-esxi-hidden-console.html
what is the output of fdisk -l

I read the manual again and found this "NOTE: Support for a single logical drive is limited to 2TB." Perhaps this is the problem.

So if possible, try creating 2 logical volumes instead(according to the manual you could create up to 32 logical volumes)

4x 250GB 7200rpm (Raid 5)
4x 500GB 7200rpm (Raid 5)
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ryder0707Commented:
Did you try that? I just had a chat with a storage engineer, he told me that it is possible to do what i've suggested above with HP SmartStart bootable CD but it depends if your server model if listed for SmartStart supported hardware
You can check at ftp://ftp.hp.com/pub/c-products/servers/management/smartstart/ServerSupportGuide8.25.pdf
Hope that helps!
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BELRpRAuthor Commented:
Worked like a charm with the smartstart cd.
If I could I would give more points for helping me out so much!
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ryder0707Commented:
Glad to help, it would be great if the Q is assigned to vmware zone since i think it is vmware related
well anyway, thanks for the points!
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