Changing The Volume Size On The Server; Increasing The Volume Size In Microsoft Windows; Increasing The Volume Size In Other Environments - HP StoreVirtual 4000 User Manual

However, the file system does not inform the block device underneath (the SAN/iQ volume) that
there is freed-up space. In fact, no mechanism exists to transmit that information. There is no SCSI
command which says "Block 198646 can be safely forgotten." At the block device level, there
are only reads and writes.
So, to ensure that our iSCSI block devices work correctly with file systems, any time a block is
written to, that block is forever marked as allocated. The file system reviews its "available blocks"
list and reuses blocks that have been freed. Consequently, the file system view (such as Windows
Disk Management) may show you have X amount of free space, and the CMC view may show
the Used Space as 100% used.
CAUTION:
block device. This can result in the SAN allocating new storage to the volume unnecessarily.
Therefore, do not defragment a file system on the SAN unless the file system requires it.

Changing the volume size on the server

CAUTION:
before shrinking it from the server file system, your data will be corrupted or lost.
When you increase the size of the volume on the SAN, you must also increase the corresponding
volume, or LUN, on the server side.

Increasing the volume size in Microsoft Windows

After you have increased the volume size on the SAN, you must next expand the Windows partition
to use the full space available on the disk.
Windows Logical Disk Manager, the default disk management program that is included in any
Windows installation, uses a tool called Diskpart.exe to grow volumes from within Windows.
Diskpart.exe is an interactive command line executable which allows administrators to select and
manipulate disks and partitions. This executable and its corresponding documentation can be
downloaded from Microsoft if necessary.
NOTE: Do not use Windows Disk Management to increase volume size.
Follow the steps below to extend the volume you just increased in the SAN.
1. Launch Windows Logical Disk Manager to rescan the disk and present the new volume size.
2. Open a Windows command line and run diskpart.exe.
3. List the volumes that appear to this host by typing the command list volume.
4. Select the volume to extend by typing select volume # (where # is the corresponding
number of the volume in the list).
5. Enter extend to grow the volume to the size of the full disk that has been expanded.
Notice the asterisk by the volume and the new size of the volume. The disk has been extended
and is now ready for use.
All of the above operations are performed while the volumes are online and available to users.

Increasing the volume size in other environments

Environments other than Windows use alternative disk management tools, which use a utility called
Extpart.exe. The only major difference is that instead of selecting the volume number, as in
Diskpart.exe, you select the drive letter instead.
Some file systems support defragmenting which essentially reorders the data on the
Decreasing the volume size is not recommended. If you shrink the volume in the CMC
Ongoing capacity management 153