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13Data Replication Manager HSG80 ACS Version 8.7P Release Notes
IBM AIX
Increased LUN Support
Beginning with Secure Path Version 1.5.19.1 for the Cambex drivers, the maximum number of
LUNs supported increased from 16 to 32.
Microsoft Windows 2000
Auto Failback
The Secure Path for Windows 2000 Auto Failback feature is not currently supported in a Data
Replication Manager configuration. Disable this feature by starting Secure Path Manager, then
selecting Properties > Autofailback > Disable.
Booting Windows 2000 Servers Over the Fabric
Any of the Windows servers can be booted from a LUN on an HSG80 controller, including a
LUN that is part of a remote copy set. Instructions for configuring servers and booting
Windows 2000 are available for download from the Web at:
http://h18000.www1.hp.com/support/storage/open_v endor/support/RAIDarray/boot_support_external_web.html
Two problem situations could arise when booting over the fabric:
■ If the boot LUN is online to a controller that the server cannot access, the server will be
unable to boot. This condition could occur if the link between the server and the fabric is
broken. At this stage of booting, the server cannot move the LUN between controllers. The
LUN must be manually moved to the other controller by issuing the following CLI
commands:
SET UNIT_NUMBER PREFERRED=OTHER
SET UNIT_NUMBER NORUN
SET UNIT_NUMBER RUN
■ When an intersite link with high latency (such as ATM) is used, the server may take a long
time to boot and may be slow to respond during normal operation. This is normal behavior
for the server. It is caused by the time required to replicate the boot disk across a very long
distance.
Check Status
If a target controller or switch becomes inoperative and the Windows 2000 host is rebooted,
Secure Path Manager will not report that you have lost multipath capability.
If you attempt to move a LUN to the inoperative path, a warning message appears, indicating
that you should check the Application Event Log for details. This may be an indication that
you have lost multipath capability.
Check the status of links, target switches, and target controllers.