HP AH226A HP 8 Internal Port SAS Controller and HP Multi-Port Internal SAS Con - Page 15

Configuring the Controller Offline, Integrated RAID, Global Hot Spare, Configuration Utilities

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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 "The drvcfg Utility" (page 16), and "The cfggen Utility" (page 41). Use the sasmgr HP-UX command to configure and maintain IR volumes online. See "The sasmgr Command Set" (page 54). 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 Operating System Online or Utility Name Interface Type or Environment Offline drvcfg GUI EFI Offline cfggen CLI sasmgr CLI HP-UX 11i v2 and Online 11i v3 For more information See ""The drvcfg Utility"." See "The cfggen Utility" (page 41). See "The sasmgr Command Set" (page 54). Integrated RAID 15

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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
“The
drvcfg Utility” (page 16)
, and
“The cfggen Utility” (page 41)
.
Use the
sasmgr
HP-UX command to configure and maintain IR volumes online. See
“The sasmgr
Command Set” (page 54)
.
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
For more information
Online or
Offline
Operating System
or Environment
Interface Type
Utility Name
See “
“The drvcfg Utility”
.”
Offline
EFI
GUI
drvcfg
See
“The cfggen Utility” (page 41)
.
CLI
cfggen
See
“The sasmgr Command Set” (page 54)
.
Online
HP-UX 11i v2 and
11i v3
CLI
sasmgr
Integrated RAID
15