IBM ServeRAID, User Reference

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For Windows NT 4.0, use the following software to replace the controller. Follow the
on-screen directions:
v IBM Netfinity PCI Hot Plug for Windows NT 4.0 Package, version 4.1 or later
v (For the ServeRAID-4M, ServeRAID-4Mx, ServeRAID-4L, and ServeRAID-4Lx
controllers only) IBM PCI Hot Plug Adapter Update, version 1.0, for the IBM
Netfinity PCI Hot Plug for Windows NT 4.0
v
IBM ServeRAID Manager program
v IBM ServeRAID Hot Replace Wizard
Recovering from a failed physical drive in a RAID level-5E environment
If a RAID level-5E logical drive undergoes compression as the result of a failed
physical drive, the failed drive will be marked defunct hot spare (DHS). Replace the
defunct physical drive or remove the defunct drive from the enclosure as soon as
possible. If a DHS drive is present, the RAID level-5E logical drive might not
failover.
Recovering from a power failure during a failover
If a power failure occurs during a failover, the two controllers in the active-passive
pair might have the following problems:
v
Some logical drives are configured on one controller and some logical drives are
configured on the other controller.
v
A logical drive does not appear on either controller.
Complete the following steps to recover from a power failure:
1. Run ipssend merge for every merge-group number configured on the active
controller.
Note: If ipssend merge fails, run ipssend merge partner for every
merge-group number configured on the active controller.
2. Run ipssend unmerge for every merge-group number configured on the
passive controller.
3. Shut down and restart the server. Windows 2000 and Windows NT 4.0 pairs the
controllers again.
Troubleshooting an IBM ServeRAID Cluster Solution
There is the possibility that one of the servers, one of the ServeRAID controllers, or
one of the hard disk drives in a cluster might fail. This section presents procedures
you can take to recover from these potential problems. If you still have problems
after following these procedures, contact your IBM service representative for further
information. Also, you can find hints and tips to help you solve problems on the IBM
Support Web site. See “Downloadable files from the World Wide Web” on page 141
for additional information.
Recovering from a failed ServeRAID server
When replacing a failed server in a high-availability configuration, you might not
need to replace the ServeRAID controller. However, if you replace your ServeRAID
controller, you must reconfigure the controller after installing your new server.
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IBM ServeRAID: User’s Reference, Version 5.10