HP Hitachi Dynamic Link Manager Software - Manual (Page 380)

4. HDLM Operation
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4.6 Reconfiguring the HDLM Operating Environment
This section describes tasks required for reconfiguring the HDLM operating
environment.
The tasks described in this section are required when you perform any of the following
operations:
• Replace hardware devices that make up a path
• Add new LUs
• Remove existing LUs
• Add paths to or remove paths from an LU
• Add devices to or remove devices from the list of devices to be managed by
HDLM
4.6.1 Replacing HBAs
You can replace HBAs without stopping any applications when all of the following
conditions are satisfied:
• The OS on the host is either of the following:
• Red Hat Enterprise Linux 5
• Red Hat Enterprise Linux 6
• The host allows HBA replacement, and the new HBAs are of the same type as the
HBAs you replace.
• Multiple HBAs are used, and the paths that pass through these HBAs are
connected to the same LU.
• Multiple paths to the LU are active.
For details on how to replace HBAs, see (2) Procedure for replacing HBAs. Note,
however, that in a BladeSymphony environment, you must make sure that you perform
the procedure described in (1) Preparation for replacing HBAs in a BladeSymphony
environment before replacing the HBAs.
(1) Preparation for replacing HBAs in a BladeSymphony environment
In a BladeSymphony environment, before you replace HBAs, perform the following
procedure to ensure that the
acpiphp
module has been loaded.
To ensure that the
acpiphp
module has been loaded:
1. Execute the
lsmod
OS command.