HP Hitachi Dynamic Link Manager Software - Manual (Page 358)

4. HDLM Operation
334
„ 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.
„ When using an HDLM device as a boot disk in Red Hat Enterprise Linux 5, if you
install or uninstall a product that uses the weak-modules script, an error might
occur. For details, see B. Troubleshooting Products That Use the Weak-Modules
Script.
„ When changing the HBA, and then restarting the host in Red Hat Enterprise Linux
5 or Red Hat Enterprise Linux 6, if you execute the
dlmcfgmgr
utility
(
dlmcfgmgr -v
), a hyphen (-) might appear in the
Device
column of the
execution result.
To avoid this, execute the
dlmcfgmgr
utility with the
-u
parameter specified.
For details on the
dlmcfgmgr
utility, see 7.3 dlmcfgmgr Utility for Managing the
HDLM Configuration.
4.1.4 Notes When Using SUSE LINUX Enterprise Server 9
Note the following when your OS is SUSE LINUX Enterprise Server 9:
„ 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
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.