IBM ServeRAID-4 Ultra160 Series User Reference page 121

To configure arrays and a logical drive, do the following.
1.
(Create arrays) on the tool bar. The Configuration mode window
Click
opens.
2. In the Main Tree, click the ServeRAID controller that you want to configure.
3. Click the Custom configuration button.
4. Click Next. The Create arrays window opens.
5. Using the right mouse button, click the ready drive or SCSI channel icons in
the Main Tree to select the drives that you want to add to your arrays or delete
from your arrays; then, select a choice from the pop-up list.
Notes:
a. You must use all the ready drives when creating your arrays (that is, all
ready drives in the Main Tree must be online).
b. Within the same array, you must have two or more physical drives for
RAID level-1 and three or more physical drives for RAID level-5.
c. For Windows NT and Windows 2000, you must create at least one logical
drive, the quorum drive, as RAID level-1 to store the quorum resource
information. This drive can be used to store programs and data.
d. For improved reliability, do not create arrays that span channels.
e. Hot-spare drives are not shared between controllers in a cluster pairing. If
you want hot-spare protection, each ServeRAID controller must have a
hot-spare drive defined.
f. You must connect hot-spare drives only to shared channels. This is in case
the hot-spare drive replaces a failed shared drive. Both servers must be
able to access their uniquely-defined hot-spare drive in case a failover
occurs after the shared drive failure.
6. After you select the ready drives for your arrays, click Next. The Create logical
drives window opens.
Note: If you change your mind, you can remove a specific drive from a newly
defined array or delete an entire newly defined array. To do this:
a. Click Back.
b. Using the right mouse button, click the specific drive or Array icon in
the Main Panel on the right.
c. Click Remove from new array or Delete new array.
7. Select a RAID level for the logical drive from the RAID pull-down menu in the
Main Panel.
Notes:
a. If you have four or more ready drives in an array, the recommended RAID
level is RAID level-5E.
b. Only one logical drive can be defined for each array.
8. Click Next. The Configuration summary window opens.
9. Review the information that displays in the Configuration summary window.
Click Apply to accept and save the configuration.
Notes:
a. To change the configuration, click Modify arrays or Modify logical drives.
Chapter 13. Configuring ServeRAID controllers for clustering
103