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3 Configuring the Controller Offline
The following information provides steps needed to configure the SAS controller during
installation. This chapter includes the following topics:
"Integrated RAID" (page 15)
"The drvcfg Utility" (page 16)
"Example: Adding, Viewing, and Deleting An Integrated Mirror Volume Using drvcfg" (page 32)
"The cfggen Utility" (page 41)
"Updating SAS Controller Firmware Offline" (page 48)
Integrated RAID
Use Integrated RAID (IR) when the fault tolerance of a RAID configuration are required. The
components of IR are:
•
Integrated Mirror (IM)
•
Global Hot Spare
Use the drvcfg and cfggen EFI utilities to configure and maintain IR volumes offline. See
drvcfg Utility" (page
Use the sasmgr HP-UX command to configure and maintain IR volumes online. See
Command Set" (page
Integrated Mirror
IM maintains a mirrored copy of the data in the array. An IM provides data protection for the
system boot volume to safeguard critical information such as the operating system on servers
and high performance workstations. An IM supports two simultaneous mirrored volumes,
making an array, providing fault-tolerant protection for critical data. Typically, one of these
volumes is the boot volume. If a disk in an IM fails, the hot swap capability enables you to easily
restore the volume by replacing the failed disk. The firmware then automatically re-mirrors to
the new disk.
Global Hot Spare
Each SAS controller can have one global hot spare disk available to automatically replace a failed
disk in the one or two IM volumes configured on the controller. The hot spare makes the IM
array more fault-tolerant. Up to two IM volumes are supported per SAS controller plus the hot
spare.
Configuration Utilities
Table 3-1
lists the offline and online utilities you can use to configure IM arrays on your HP
Integrity Server.
Table 3-1 SAS Controller Configuration Utilities
Utility Name
Interface Type
GUI
drvcfg
CLI
cfggen
CLI
sasmgr
16), and
"The cfggen Utility" (page
54).
Operating System
Online or
or Environment
Offline
EFI
Offline
HP-UX 11i v2 and
Online
11i v3
41).
For more information
See
""The drvcfg
Utility"."
See
"The cfggen Utility" (page
See
"The sasmgr Command Set" (page
"The
"The sasmgr
41).
54).
Integrated RAID
15
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