HP VMA SAN Gateway for VMA-series Memory Arrays Release Notes - December 2012

2. Under the MPIO Devices tab, verify that there is a Device Hardware ID entry for ‘VIOLIN SAN ARRAY

‘ in the list of IDs. There will be a generic Device Hardware Id template entry, ‘Vendor8 Product 16’

which is only an example entry and does not bind to any storage. It is okay to leave this template entry

in the list.

3. Only if an entry is not in the Device Hardware ID table for ‘VIOLIN SAN ARRAY ‘, try issuing the

mpclaim function to re-identify devices for MPIO management. Click:

START -> Run -> cmd -> enter the command: mpclaim.exe -r -i -a ""

4. The system will automatically reboot after running the mpclaim command.

5. To validate the MPIO settings, click:

START -> Administrative Tools -> Computer Management -> Disk Management, and you

can validate the number of disks you have created and presented to this server from the VMA SAN

Gateway.

Queue-Depth Settings for Windows 2008 R2 SP1

The HBA drivers used with Windows Server 2008 R2 SP1 have default LUN level queue depth values

of 30 or 32 depending upon the HBA vendor. In many cases this default value will provide good

results. However in cases where a large number of LUNs are used with a large number of server FC

initiator ports, the resulting I/O load could cause Queue-Full conditions and I/O retries leading to

non-optimal performance.

For optimal I/O performance, use the following equation to determine the LUN queue depth settings

for the FC HBA driver:

LUN Queue Depth value =

(( <# gateway FC target ports> * 1024) / <# of server FC initiator ports> / <# of LUNs>)

If the resulting LUN Queue Depth value is greater than the HBA driver default (usually 30 or 32), then

use driver default.

Supported web browsers with vSHARE GUI

To launch the vSHARE web-based GUI, enter the VMA SAN Gateway IP address in the web address

space of the web browser. The vSHARE GUI requires the Java plug-in to be added and enabled in the

web browser in order to function correctly. Supported web browsers for use with the vSHARE web-

based GUI are:

• Internet Explorer (IE) version 9 or newer. When using IE, disable IE compatibility mode:

(Tools -> ‘Compatibility View Settings’ ->

uncheck ‘Display Intranet sites in Compatibility View’)

• Mozilla Firefox version 6 or newer

VMA SAN Gateway: general recommendations and

limitations

The following are general recommendations for getting optimal performance with the HP VMA SAN

Gateway and connected HP VMA-series Memory Arrays.

Alignment of data transfer I/O block sizes

The internal flash addressing of the VMA is based on 4K (4096) byte boundaries. Read or write

requests that do not begin on a 4KB aligned target block address or are of I/O sizes not a multiple of