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PowerPath for UNIX Installation and Administration Guide
Installing PowerPath
❑ Uninstall any earlier version of PowerPath.
The PowerPath installation program exits if it detects an existing
version of PowerPath.
Important: Before you uninstall the earlier version, save your
configuration using the
powermt save command. Refer to the
documentation for the earlier version for further uninstallation
instructions.
You need not reboot the host after you uninstall the earlier version of
PowerPath. You must, however, reboot the host after you install
PowerPath 4.0.
❑ Configure HBA drivers.
CAUTION
Be sure to follow HBA driver configuration guidelines outlined by
EMC in the EMC Support Matrix and product documentation.
Using improper settings can cause erratic failover behavior, such as
greatly increased I/O delays.
❑ For hosts connected to storage arrays via a Fibre Channel switch
(that is, a fabric), configure the HBAs using persistent binding for
SCSI target IDs.
CAUTION
Failure to do so could result in loss or corruption of data.
For information about persistent binding, refer to the Host
Connectivity Guide for Sun Solaris, the HBA driver documentation,
and the
.conf file for your HBA type.
❑ Optionally, configure the host to send warnings to the console.
By default, warning messages are sent only to the log file. To see
warnings on the console:
1. Add the following line to the
/etc/syslog.conf file:
localX.Warn /dev/sysmsg
where X is a value that is not used by any other local setting
in
/etc/syslog.conf.