The following sections describe setting up SCSI and Fibre Channel devices that the cluster systems share. For VCS I/O fencing, the data disks must support SCSI-3 persistent reservations. You need to configure a coordinator disk group that supports SCSI-3 PR and verify that it works.
See also the Veritas Cluster Server User's Guide for a description of I/O fencing.
Perform the following steps to set up shared storage.
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For more than two systems, disable SCSI termination on systems that are not positioned at the ends of the SCSI chain.
Because the SCSI Initiator IDs for the host bus adapters (HBAs) on each of the systems accessing shared storage must be unique, you may have to change the HBA SCSI ID on one or more systems if they are the same. Typically, the host bust adapters (HBAs) for the SCSI devices are shipped with a default SCSI ID of 7. Use the following procedure to check SCSI IDs and change them if necessary.
To discontinue, press any key within 10 seconds.
Information Menu: Enter command > io
The output shows information about the I/O interfaces and resembles:
----------- ---- --- ----- ------ ------
Service Menu: enter command or menu > scsi
The output displays information about the SCSI devices:
Path (dec) Initiator ID SCSI Rate Auto Term
-------------- ------------ --------- ---------
The output in this example shows the SCSI ID is 7, the preset default for the HBA as shipped.
Service Menu: Enter command > SCSI init 0/3/0/0 6
FAST
Path (dec) Initiator ID SCSI Rate Auto
Term
-------------- ------------ --------- -------
--
Menu: Enter command or menu > boot
To set up fibre channel shared storage
Where "disk" is the class of devices to be shared. For example, from a system, north type:
Class I H/W Path Driver S/W State H/W Type Description
===============================================================
disk 4 0/4/0/0.1.16.255.13.4.0 sdisk CLAIMED DEVICE
/dev/dsk/c4t4d0 /dev/rdsk/c4t4d0
disk 5 0/4/0/0.1.16.255.13.5.0 sdisk CLAIMED DEVICE
/dev/dsk/c4t5d0 /dev/rdsk/c4t5d0
And on another system, south, enter:
Class I H/W Path Driver S/W State H/W Type Description
===============================================================
disk 4 0/4/0/0.1.16.255.13.4.0 sdisk CLAIMED DEVICE
/dev/dsk/c4t4d0 /dev/rdsk/c4t4d0
disk 5 0/4/0/0.1.16.255.13.5.0 sdisk CLAIMED DEVICE