IBM G27, User Reference

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Chapter 4. Setting up storage
This chapter gives details for setting up and configuring the fibre-attached storage
for the NAS Gateway 300.
Note: You need to configure the storage on one node only. For the other node (the
joining node), the only part of shared storage setup that you will need to
complete is assigning drive letters on the shared storage, making sure that
the drive letters are the same as those on the first node.
Configuring arrays and logical drives on the fibre-attached storage
You will need to configure the RAID arrays and logical drives (LUNs) on the
fibre-attached storage, or contact your disk administrator to do the configuration.
The specific procedures for configuring arrays and LUNs are defined by the
fibre-attached storage, so its documentation must be consulted for those
procedures.
You will need to get the World Wide Name (WWN) of the Fibre Channel host
adapter to set up an association between the NAS Gateway 300 node and each
LUN that you create on the fibre-attached storage. To get the WWN:
1. Click the IBM NAS Admin icon.
2. Select NAS Management .
3. Select Storage .
4. Select NAS Utilities .
5. Select IBM Fibre WWN .
The IBM Fibre WWN panel will display information for each Fibre Channel
adapter installed in your NAS Gateway 300, including PCI slot number and
World Wide Name. The slot number given is not the physical PCI slot location of
the adapter within the system but rather a reference slot to the PCI bridge of the
PCI system. If you have only one Fibre Channel adapter, the information for that
adapter will appear immediately in the fields on the right side of the panel.
If you have multiple Fibre Channel adapters, select the radio button next to
each adapter listing until you find the one whose displayed PCI slot number
matches the PCI slot number of the actual adapter. Make a note of the World
Wide Name that is displayed so that you can provide this when configuring your
fibre-attached storage to be accessed through the NAS Gateway 300.
There is an additional requirement imposed on the configuration of the
fibre-attached storage: one LUN must be defined for the Quorum drive. The
Quorum drive is used by Microsoft Cluster Service to manage clustered resources,
including the fibre-attached storage. The requirements for the Quorum drive LUN
are the following:
v The array in which you create the Quorum drive LUN should be RAID 5. This is
recommended for performance and redundancy.
v The Quorum drive LUN should be at least 500 MB in size, but no larger than 1
GB.
v The Quorum drive LUN should be completely dedicated for use by Microsoft
Cluster Service; no other data should be stored on this LUN. However, it is
acceptable for the array in which this LUN is created to have other LUNs.
v
See “Recovering from a corrupted Quorum drive” on page 52 in the event of a
power loss to both nodes or a hardware failure that corrupts Quorum data.
© Copyright IBM Corp. 2002
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