Adding Expansion Enclosures - Silicon Graphics InfiniteStorage TP9300 User Manual

Adding Expansion Enclosures

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You can add new expansion enclosures to an existing storage array without turning off
the array or interrupting data flow.
Caution: You can add only new expansion enclosures to the storage array. This means
that there must be no existing information on the drives in the expansion enclosure you
want to install. If the enclosure you want to install currently contains volumes or
configured hot spare drives, you must delete them before adding the enclosure to a new
configuration.
You need to refer to the installation manual accompanying your controller and
expansion enclosures to complete this procedure.
To install one or more new expansion enclosures into an existing loop, follow these steps:
1. Follow the instructions in the SGI InfiniteStorage TP9300 and TP9300S RAID
Installation and Upgrade Guide to set up and mount the new expansion enclosures
and to connect them to each other.
2. Using Figure 4-9 as a guide, connect the cables from the controller enclosure to the
new expansion enclosure(s). Then, if applicable, connect the cables from the existing
expansion enclosure(s) to the new expansion enclosure(s). See Figure 4-10 on
page 67 for an example of a single conroller storage array connection.
Warning:
Electrostatic discharge can damage sensitive components. Use a
grounded wrist strap or other antistatic precautions before handling enclosure
components.
3. After you have connected the cables to the new expansion enclosures, the
controllers will locate the new disk drives.
Important: Depending on how long it takes you to complete step 2, TPSSM may
report a loss of redundancy error on the expansion enclosures in the loop. This error
will not interfere with data flow, and will disappear after you finish installing the
expansion enclosure(s).
4. Use TPSSM to check the status of the new drives and correct any errors found.

Adding Expansion Enclosures

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