Chapter 3. Before you begin adding file modules
These installation instructions cover adding file modules to an existing Storwize
V7000 system to make a Storwize V7000 Unified system.
Do not use these instructions if you have purchased a complete Storwize V7000
Unified system unless directed to do so by IBM Remote Technical Support.
If you have a problem with the initial setup or the initial configuration then refer
to the Troubleshooting section of the Information Center. If you still have an issue,
then contact IBM Remote Technical Support.
File modules can be added to a Storwize V7000 system having more than one
control enclosure. However, only two file modules are allowed on the system. The
control enclosure that presents IO group 0 (that is zero) is the only one directly
connected by Fibre Channel to the file modules. File volumes for file systems can
only be created in IO group 0.
The Storwize V7000 control enclosure that presents IO group 0 could have every
available Fibre Channel (FC) port connected to the Storage Area Network (SAN).
Any host, storage system or node logins that go trough FC port 1 or FC port 2 of
the node canisters in IO group 0 need to be disabled or moved over to FC ports 3
and FC port 4 of each node canister. Having all block volume IOs going through 1
or 2 FC ports on each node canister will probably not cause any change in
performance, compared to using all 4 FC ports on each node canister.
A single 8 Gbps Fibre Channel (FC) port or a pair of 4 Gbps FC ports per node
canister, has more than enough band width (BW) to saturate the storage IOps of
the Storwize V7000. If you will end up with less FC BW connected to the SAN,
then you should check that the current peak time FC MBps per node fit in 90% of
the final FC BW per node.
The best practice guidance for capacity and performance is:
v
The total capacity of file systems should not be more than the capacity of 4
Storwize V7000 enclosures. The maximum file work load should be less than
20,000 file operations per second. Otherwise ask IBM if the Storwize V7000
Unified is the best product to meet your needs.
Note the following:
v
The loss of storage capacity caused by adding file modules to your system is
insignificant.
v
The loss of storage capacity caused by adding a file system is insignificant
compared to the space that you allocate for files in that storage system.
Important information:
1.
You must first work through the planning information regarding your physical
environment and logical network in the Storwize V7000 Unified Information
Center. Refer to Chapter 2, “Planning for adding file modules,” on page 3.
2.
Ensure that you have available any cables that you are supplying.
3.
Pay attention to any flyers that were shipped with your shipping order.
© Copyright IBM Corp. 2012, 2014
41
Summary of Contents for Storwize V7000
Page 151: ......
Page 152: ...Part Number 00MJ333 Printed in USA SC27 4223 05 1P P N 00MJ333...
