5. Installing Optional Devices
Express5800/R320c-E4, R320c-M4 Maintenance Guide (Linux)
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Chapter 2 Configuring and Upgrading the System
•
Configuring multi path
Important This operation must be executed by only root user.
1. Run the following command to create
multi path device.
# multipath
When this command is executed, dm device of dm-X (X denotes number) and dm-mp device (symbolic
link to dm device) of mapper/mpathN and mappaer/mpathNpM (N is an alphabetic character and M is
natural number except 1) are created under /dev.
Then sd device of FibreChannel is virtualized as a dm-mp device by each path.
The dm device uses dm-mp device since it has no distinction between entire device and the partition.
mpathN is Nth LUN, mpathNpM is Mth partition in mpathN.
2. Run the following command to start path watch daemon (multipathd).
# chkconfig multipathd on
# /etc/init.d/multipathd start
3. Run the following command to check the path condition.
# multipath –ll
The path condition of each dm-mp device can be displayed.
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Changing environment in running system
–
Change partition
Run fdisk command to virtualized /dev/mapper/mpathN (N is an alphabet).
OS must be rebooted to reflect the change to the system.
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Add, modify, remove LUN
OS must be rebooted to reflect the change to the system.
(3)
N8803-039 SAS Board
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Slots to install optional PCI cards
See
"List of option PCI cards and installable slots"
in
Chapter 2 (5.7.1 Precautions)
.
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Driver installation procedure
Install N8803-037 SAS board and start the system.
After starting the system, the driver will be installed automatically.