Expanding The Lun - IBM TotalStorage NAS 300 User Reference

You can configure other arrays and LUNs for user data as required. However, do
not create any arrays that are RAID 0, as this is not supported. It is recommended
that all arrays be RAID 5 arrays.

Expanding the LUN

LUN expansion is enabled by the DiskPart command line utility. Using DiskPart and
array/LUN management software, you can dynamically expand an existing logical
drive into unallocated space that exists in a LUN.
Note that you cannot use DiskPart to dynamically expand an existing LUN in an
array. You can do this only with array/LUN management software such as Storage
Manager Application. DiskPart cannot change the size of the drive that the external
storage has configured; it can only change how much of the drive that Windows can
use.
Attention:
data before using the DiskPart utility.
To perform LUN expansion, use the following two DiskPart commands:
select This command focuses on (selects) the volume that you want to expand.
extend
Note that if the partition had been formatted with the NTFS file system, the file
system is automatically extended to occupy the larger partition, and data loss does
not occur. However, if the partition had been formatted with a file system format
other than NTFS, the command is unsuccessful and does not change the partition.
DiskPart blocks the extension of only the current system or boot partition.
Several other commands are useful when you expand the LUN:
assign
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NAS Gateway 300 User's Reference
It is highly recommended that you always perform a backup of your
The format of the command and its options are
select volume[=n/l]
You can specify the volume by either index, drive letter, or mount point
path. On a basic disk, if you select a volume, the corresponding partition is
put in focus. If you do not specify a volume, the command displays the
current in-focus volume.
This command extends the current in-focus volume into contiguous
unallocated space. The unallocated space must begin where the in-focus
partition ends. The format of the command and its options are
extend [size=n]
where size is the size of the extension in MB.
Use this command to assign a letter or mount point to the current selected
(in-focus) partition. If you do not specify a drive letter, the next available
drive letter is assigned. If the letter or mount point is already in use, an
error is generated.
You can use this command to change the drive letter that is associated with
a removable drive. The drive letter assignment is blocked on the system,
boot, or paging volumes. You cannot use this command to assign a drive
letter to an OEM partition or any globally unique identifier (GUID) partition
table (GPT) partition, other than the Msdata partition.