HP Hitachi Dynamic Link Manager Software - Manual (Page 196)

3. Creating an HDLM Environment
172
3.7 Installing HDLM for Managing Boot Disks
This section explains the procedure for installing HDLM in an environment in which
the boot disk is on a SCSI device in the storage system, and for creating an HDLM
device. This section also explains the procedure for setting up an environment in which
the HDLM device is the boot disk.
3.7.1 Notes on Installing HDLM in a Boot Disk Environment
Note the following when using HDLM on a boot disk:
„ The storage system for which the boot disk will be created must satisfy the
following conditions:
• The storage system supports the boot disk functionality even if HDLM is not
used.
• HBAs support startup from the storage system.
„ When you install the OS, create the root directory (
/
) and the
/boot
directory in
separate partitions.
„ When you use HDLM as a boot disk, do not specify an HDLM device for the
kernel parameters
resume
,
journal
, and
dump
.
„ When Red Hat Enterprise Linux, SUSE LINUX Enterprise Server 10 , or SUSE
LINUX Enterprise Server 11 is used, HDLM supports environments that use
LVM2 as a boot disk.
„ When Red Hat Enterprise Linux, SUSE LINUX Enterprise Server 10 , or SUSE
LINUX Enterprise Server 11 is used, HDLM does not support an environment
that uses an md device as a boot disk.
„ If you changed the configuration during startup or if the
/etc/fstab
file settings
are incorrect, the system might not start.
„ If the root directory (
/
) has not been mounted at startup, you cannot collect a boot
error log (
/etc/opt/DynamicLinkManager/hdlmboot.log
). In this case, if
a problem occurs, use the log displayed on the console to analyze the problem.
„ The
dlmcfgmgr
log created at startup is output to
/etc/opt/
DynamicLinkManager/hdlmboot.log
.
„ Once you have built an environment for starting the OS from an HDLM device,
you cannot change the boot disk.
„ If you do not use the storage systems disk set for the boot disk, before you install
HDLM, edit the
/etc/fstab
file in the following manner to disable the
LABEL
specification and enable the sd device specification.