Notes when using suse linux enterprise server 10 – HP Hitachi Dynamic Link Manager Software Licenses User Manual
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Updating Kernel Packages and Applying OS
.
Notes When Using SUSE LINUX Enterprise Server 10
Note the following when your OS is SUSE LINUX Enterprise Server 10:
•
To update a kernel package or apply an OS update package, remove
HDLM first. Perform the update and then install HDLM again.
For detailed procedures, see
Updating Kernel Packages and Applying OS
.
•
SCSI devices corresponding to an HDLM device can be removed
dynamically even while the HDLM device is in use. Before doing so,
perform the following operations:
a
.
Unmount any devices mounted on the HDLM device.
b
.
Execute the dlmcfgmgr -o command to exclude the HDLM device
from management.
•
HDLM devices cannot be used to create an md device.
•
If you execute the sync command on the file system that is mounted by
ext3/ReiserFS, the following message is output to syslog, but there is no
problem with HDLM operations.
JBD: barrier-based sync failed on sddlmaa1 - disabling barriers
•
If the number of I/O operations that have occurred in the system exceeds
the execution performance of the system (in an environment in which all
of the conditions below exist), the KAPL05008-E message and the call
trace of a kernel might be output.
¢
Hitachi WMS series exists in HDLM management-target devices.
¢
In the utility for setting HDLM driver option (dlmsetopt), the number
of retries for allocating memory is set to 0 through 2,147,483,646.
In this case, the system might become unstable, and an error might occur
in the I/O that is being executed. In the dlmsetopt utility, set -1 or a
value greater than the current value for the number of retries for
allocating memory, and then restart the system. If a call trace is output
even after the retry count is set to -1, consider adding memory and
stopping unnecessary processes.
•
When a device is dynamically configured by using the udev function, the
messages shown below might be output to the console or syslog.
However, HDLM operations are not affected.
Output example:
scsi_id[a01]: scsi_id: unable to access parent device of '/block/
sddlma01'
For a01 in the above examples, any alphanumeric character can be
output.
4-6
HDLM Operation
Hitachi Dynamic Link Manager (for Linux®) User Guide