IBM totalstorage 326 User Reference page 46

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 that are useful when you expand the LUN are:
assign
convert
list
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Model 326 User's Reference
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.
The format of the command and its options are:
assign [letter=l] or [mount=path]
You can use several commands to convert disks. The format and options
for each of the commands are:
convert mbr
convert gpt
convert dynamic
convert basic
convert mbr sets the partitioning style of the current disk to master boot
record (MBR). The disk can be a basic disk or a dynamic disk but the disk
must not contain any valid data partitions or volumes.
convert gpt sets the partitioning style of the current disk to GPT. The disk
may be a basic or a dynamic disk but it must not contain any valid data
partitions or volumes. This command is valid only on Itanium
computers; it can be unsuccessful on x-86-based computers.
convert dynamic changes a basic disk into a dynamic disk. The disk can
contain valid data partitions.
convert basic changes an empty dynamic disk to basic.
You can use several commands to display summaries of disk configuration.
The format for each of the commands is:
list disk
list partition
list volume
list disk displays summary information about each disk in the computer.
The disk with the asterisk (*) has the current focus. Only fixed disks (for
example, IDE or SCSI) or removable disks (for example, 1394 or USB) are
listed. The removable drives are not displayed.
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