Notes When Using Suse Linux Enterprise Server 10 - Hitachi XP P9500 User Manual

JBD: barrier-based sync failed on sddlmaa1 - disabling
barriers
Before you update the OS SP, uninstall HDLM. After you have updated the OS
SP, re-install HDLM.
For details on HDLM installation and uninstallation, see 3.6 Installing HDLM
and 3.23.11 Uninstalling HDLM.
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 exists in HDLM management-target devices.
• In the utility for setting HDLM driver option (
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
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.

4.1.5 Notes When Using SUSE LINUX Enterprise Server 10

Note the following when your OS is SUSE LINUX Enterprise Server 10:
Before you update the kernel package, uninstall HDLM. After you have updated
the kernel package, re-install HDLM.
For details on HDLM installation and uninstallation, see 3.6 Installing HDLM
and 3.23.11 Uninstalling HDLM.
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:
1. Unmount any devices mounted on the HDLM device.
2. Execute the
management.
HDLM devices cannot be used to create an md device.
If you execute the
ReiserFS, the following message is output to syslog, but there is no problem with
HDLM operations.
dlmsetopt
command to exclude the HDLM device from
dlmcfgmgr -o
command on the file system that is mounted by ext3/
sync
4. HDLM Operation
), the number of
dlmsetopt
utility, set -1 or a value greater than
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