Managing HP Serviceguard for Linux Ninth Edition, April 2009

Configuration” (page 220). In addition, the following should be monitored for errors
or warnings of all kinds:
• CPUs
• Memory
• LAN cards
• Power sources
• All cables
• Disk interface cards
Some monitoring can be done through simple physical inspection, but for the most
comprehensive monitoring, you should examine the system log file
(/var/log/messages) periodically for reports on all configured HA devices. The
presence of errors relating to a device will show the need for maintenance.
Replacing Disks
The procedure for replacing a faulty disk mechanism depends on the type of disk
configuration you are using. Refer to your Smart Array documentation for issues related
to your Smart Array.
Replacing a Faulty Mechanism in a Disk Array
You can replace a failed disk mechanism by simply removing it from the array and
replacing it with a new mechanism of the same type. The resynchronization is handled
by the array itself. There may be some impact on disk performance until the
resynchronization is complete. For details on the process of hot plugging disk
mechanisms, refer to your disk array documentation.
Replacing a Lock LUN
You can replace an unusable lock LUN while the cluster is running. You can do this
without any cluster reconfiguration if you do not change the devicefile name; or, if you
do need to change the devicefile, you can do the necessary reconfiguration while the
cluster is running.
Replacing Disks 273