HP XP P9500 Storage - Manual (Page 602)

Notes on the mkfs Command
If you are going to create a file system for an HDLM device, specify the name
of a logical device file of the HDLM device for the mkfs command. However, if
a file system is created for a SCSI device that is already in use, the applicable
HDLM device will be created with a file system even without creating a new
file system by using the mkfs command.
Furthermore, if the mkfs command is executed for a SCSI device, a message
confirming whether to execute the command will appear; however, when an
HDLM device is specified, the message will not appear.
Notes on the fdisk Command
You can perform operations on a partition of an HDLM device by executing
the fdisk command with the name of a logical device file of the HDLM device
specified. Up to 15 partitions can be created just as for a SCSI device. In
addition, by setting up partitions in an HDLM device, partitions can be set up
in a corresponding SCSI device at the same time.
However, partitions for a device managed by HDLM will not be automatically
created at the same time even when partitions are created for a
corresponding SCSI device that HDLM manages. In this case, restart the host
to make the partitions the same as those for the corresponding SCSI device.
If HDLM is installed for the first time, an HDLM device that inherits the
partitions of the corresponding SCSI device will be created automatically.
Also, in an IPF or EM64T/AMD64 environment, if you execute the fdisk
command on the HDLM device while running SUSE LINUX Enterprise Server 9
or Red Hat Enterprise Linux AS4/ES4, an error message (KAPL05023-E) is
output to the syslog file. However, HDLM operations are not affected.
Notes on the sar Command
Executing the sar command with the -d or -A option does not display HDLM
devices. To obtain statistics about an HDLM device, perform calculations by
using the value of the SCSI device that conforms to the HDLM device. The
following is an example of executing the sar command.
A-4
Notes on Linux Commands and Files
Hitachi Dynamic Link Manager User Guide (for Linux(R))