StorageWorks EK-SMRAB-IG, Руководство по установке

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Appendix D. Configuring STRIPEsets, MIRRORsets, and Striped MIRRORsets
EK–SMRAB–IG. B01 D–3
D.2.2 Add the MIRRORset as a Logical Unit
To make a MIRRORset available to the host computer, you must add it as a host logical
unit with a unique unit number. The unit number is a one or three digit number preceded
by “D”, such as “D0” or “D102”. The unit number is made of the controller’s target ID
and the Logical Unit (LUN) of the MIRRORset for the target. Each target ID can have up
to eight LUNs, numbered 0–7.
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Units identified with controller target ID 0 have a single digit number which
corresponds to the LUN number. For example, D5 would be target 0, LUN 5.
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Units identified with all other controller targets (1–7) use a 3 digit number. The first
digit corresponds to the controller target number, the second digit is always 0 and the
third digit is the LUN number. For example, D205 would be target 2, LUN 5.
Identify the MIRRORsets as host logical units by using the ADD UNIT command.
HSZ20> ADD UNIT D200 MIRROR1
This example uses the controller target ID of 2 and LUN 0.
D.2.3 Set Writeback Cache
The final step in creating the MIRRORset is to enable the writeback cache. A single CLI
command enables that feature for the entire MIRRORset:
HSZ20> SET D200 WRITEBACK_CACHE
Where D200 represents the host logical unit of the MIRRORset created above.
D.3 Create a Striped MIRRORset (Configuration Example 2)
If your site requires striped MIRRORsets for storage, you must assign disks to
MIRRORsets and then assign the MIRRORsets to a STRIPEset.
D.3.1 Create the MIRRORsets
MIRRORsets must have at least two members, and can have as many as six. This
example creates 2, two-member MIRRORsets using the ADD MIRRORSET command.
HSZ20> ADD MIRRORSET MIRROR3 DISK100 DISK200
HSZ20> ADD MIRRORSET MIRROR4 DISK110 DISK210
In this example, “MIRROR3” and “MIRROR4” are the names of the MIRRORsets, and
they are followed by a list of the disks to be included in each MIRRORsets.
D.3.2 Create a STRIPEset from the MIRRORsets
Striped MIRRORsets must have at least two members, and can have as many as
fourteen. This example creates a two-member STRIPEset using the ADD STRIPESET
command.
HSZ20> ADD STRIPESET MIRSTR1 MIRROR3 MIRROR4
In the previous example, “MIRSTR1” is the name of the striped MIRRORset, and it is
followed by a list of MIRRORsets to include in the STRIPEset. The name of the
STRIPEset is user-defined. Performance of your striped MIRRORset will be optimized if
each MIRRORset includes disks from different buses.