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PowerPath for UNIX Installation and Administration Guide
PowerPath Administration on Solaris
R1/R2 Boot Failover Support
If a storage system device corresponding to a bootable emcpower
device is mirrored via SRDF
®
, it is possible in the event of a server
failure at the local storage system to fail over the boot disk to the
remote mirror disk and then boot the server on an identical remote
host.
Contact EMC Customer Support for assistance when configuring
R1/R2 boot disk failover.
R1/R2 Supported
Configurations
EMC supports the following specific R1/R2 configurations:
◆ Each boot host is connected to only one Symmetrix.
◆ The two hosts must have identical hardware.
◆ All R1 devices reside on one Symmetrix, Symmetrix A, and are
visible only to a single host, Host A.
◆ All R2 devices reside on a separate Symmetrix, Symmetrix B, and
are visible only to the identical host in reserve, Host B.
◆ Each R1 device has only one mirror. (Concurrent SRDF is not
supported.)
◆ Neither host has non-mirrored devices, BCVs, or gatekeepers.
◆ SRDF is managed from either of the following two facilities:
• EMC ControlCenter Management Server
• Symmetrix Service Processor
R1/R2 Boot
Procedure
R1/R2 boot support assumes that the systems are configured to boot
from an emcpower device. If you plan to enable R1/R2 boot disk
failover, after you install PowerPath, run the
powercf -Z command
while booted on the R1 copy of the boot disk.This will update the
emcp.conf file so that each entry contains both an R1 and an R2
Symmetrix volume ID for the pseudo (emcpower) device.