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WIndows Storage Server 2008 x64 2 TB limit

Does anyone know if there is a limit in the OS to support only up to 2tb drives? I have 3 tb drives that i installed in a JBOD and they are only showing as 2199GB.  I already upgraded the firmware on the controller and contacted the manufactures whether the drive are supported by the controller, so i am ruling that out at the moment.

THe controller is a smart array p212/256
HP storageworks x1500 server
Windows storage server 2008 x64

Thanks
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mnevoso
Asked:
mnevoso
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1 Solution
 
penguinjasCommented:
The disk type you are using is MBR which does have a limit.  You need to use a GPT disk.  I believ you can convert an MBR disk to GPT.  I have Windows 2008 x64 with a 12TB disk, the OS is not limited.
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penguinjasCommented:
Open Disk Management on your 2008 server and select the disk.  You should be able to right-click and choose convert disk to GPT.  You should then see the total space you expect.
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mnevosoAuthor Commented:
the disks are not part of an array yet so they do not show up in disk management
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penguinjasCommented:
Where are you viewing the disk size then?  You mentioned they were showing up as 2199GB.  The disks need to be converted to GPT to show up as 3TB drives.  If you are viewing them using something other than disk manager see if there is a way to convert them.
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mnevosoAuthor Commented:
im using the HP Array Configuration Utility
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-tjsCommented:
I wonder if the HP Array Configuration Utility already made these GPT disks since 2199 GB is already larger than what MBR would allow.  Taking the 3TB advertised size really means 3 trillion bytes which translates to roughly 2794 real GB, assuming every byte is accounted for on the disk (they aren't always).  GPT has overhead in the form of two partitions - an EFI partition and an MSR partition.  The minimum size of these partitions is roughly 100MB for EFI and 128MB for MSR, though it is not illegal to exceed these minimums.  So subtracting these minimums from 2794 leaves us with 2566 GB.  But I would check the HP array configuration utility and check to see if it allocated more for these possibly hidden partitions to explain the other missing megabytes.
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Handy HolderSaggar makers bottom knockerCommented:
What did you upgrade the firmware level to? You need 5.06 or greater to support disks bigger than 2.2TB / 2 TiB. This was only introduced recently so some download pages on HP's site may only list older versions. Also are you using an external shelf or internal one and if so which? You can't be using JBOD, that controller can't have RAID disabled, at least not with any tools HP will release publically.
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mnevosoAuthor Commented:
Firmware is 5.12
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Handy HolderSaggar makers bottom knockerCommented:
And does the enclosure have firmware that supports large disks? presumably it has a SAS expander in it which would have to understand big disks which may exclude SAS version 1.
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mnevosoAuthor Commented:
yes it does i upgraded the enclosure to the latest firmware as well.
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