Hitachi Dynamic Link Manager Software Users Guide for Linux

block/sddlma01
For a01 in the above examples, any alphanumeric character can be
output.
• You cannot execute the partprobe command for HDLM devices because
this command does not support HDLM devices.
If you want to add a partition to or delete a partition from an HDLM
device (LU), first stop all applications that are using the target HDLM
device (LU) so that the HDLM device (LU) is not being used
#
.
If you add or delete a partition while an HDLM device (LU) is being used,
restart the host to reload the partition table.
#
This state is achieved when none of the partitions of the HDLM device
(LU) are being used.
Notes When Using Red Hat Enterprise Linux 5, Red Hat Enterprise
Linux 6, Oracle Enterprise Linux 5, Oracle Unbreakable Enterprise
Kernel 5, or Oracle Unbreakable Enterprise Kernel 6
Note the following when your OS is Red Hat Enterprise Linux 5, Red Hat
Enterprise Linux 6, Oracle Enterprise Linux 5, Oracle Unbreakable Enterprise
Kernel 5, or Oracle Unbreakable Enterprise Kernel 6:
• 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.
• 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 remove a product that uses the weak-modules script, an
error might occur. For details, see
Appendix B, Troubleshooting Products
That Use the Weak-Modules Script on page B-1.
• To update a kernel package or apply an OS update package in Oracle
Unbreakable Enterprise Kernel 5, remove HDLM first. Perform the update
and then install HDLM again.
HDLM Operation
4-5
Hitachi Dynamic Link Manager (for Linux®) User Guide