HP Serviceguard Extended Distance Cluster for Linux Release Notes, First Edition, December 2006

HP Serviceguard Extended Distance Cluster for Linux Release Notes
Known Problems and Workarounds
Chapter 1 13
Known Problems and Workarounds
The following describes known problems with the XDC software. This is
subject to change without notice. For the most current information,
contact your HP support representative.
More recent information on known problems and workarounds may also
be available on the Hewlett Packard IT Resource Center:
http://itrc.hp.com (Americas and Asia Pacific)
http://europe.itrc.hp.com (Europe)
disks are resynchronized at all times
• What is the problem?
When data on two disks is not synchronized, Software RAID
resynchronizes the entire disk, rather than only updating the
changed data. This may happen even after a basic cluster failover.
• What is the workaround?
There is no workaround as this is expected behavior with an MD
driver.
MD parameters in the package control script
• What is the problem?
The package control script has a few MD related parameters.
• What is the workaround?
Earlier versions of HP Serviceguard supported MD as a
multipathing software. As a result, the package control script
includes certain configuration parameters that are specific to MD. Do
not use these parameters to configure XDC in your environment.
Following are the parameters in the configuration file that you must
not edit:
# MD (RAID) CONFIGURATION FILE
# Specify the configuration file that will be used to define
# the md raid devices for this package.