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BladeCenter unit
SAS
adapter
card
BladeCenter QS22
Figure 28. BladeCenter Boot Disk System setup for the QS22 blade server
The SAS expansion card is attached to the PCI-X connector of the blade server.
Two SAS cables connect the SAS connectivity modules at the rear of the
BladeCenter unit to the BladeCenter Boot Disk System.
Depending on the availability requirements of a particular installation, a SAS fabric
might use different redundancy strategies. For example, there might be just a single
SAS connectivity module or there might be duplicate SAS cables. Production
environments, typically, have multiple storage systems and BladeCenter units.
For setup and configuration information see the BladeCenter Boot Disk System
information on the BladeCenter support Web site at http://www.ibm.com/systems/
bladecenter/support/. For a general introduction with setup examples see IBM
System Storage DS3000: Introduction and Implementation Guide, SG24-7065, at
http://www.redbooks.ibm.com/redbooks/pdfs/sg247065.pdf.
Complete the following steps to configure a boot device:
1. Start your Storage Manager. For details on steps 2 to 6 see the documentation
that comes with the Storage Manager.
2. Make the BladeCenter Boot Disk System accessible to the Storage Manager by
performing a discovery.
3. Assign a name to the BladeCenter Boot Disk System.
4. Make the storage system accessible to the blade server by configuring host
access for the blade server.
If two SAS connectivity modules are installed on the BladeCenter unit, the
Storage Manager detects two ports for your blade server. If two ports are
detected, be sure to add the SAS address for both ports.
5. Create a logical drive and map it to the blade server.
v Note the logical drive name you assign when you map the new logical drive
to the blade server. You need this name to find the SAS address of a boot
device.
v Note the logical unit number (LUN) you assign when you map the new logical
drive to the blade server. You need this LUN when defining the logical drive
as a boot device for the blade server.
Each logical drive is automatically assigned to one of the controllers of the
BladeCenter Boot Disk System. This controller becomes the preferred controller
of the logical drive.
6. Find out the SAS address for the boot device.
a. Click the Summary tab.
SAS
connectivity
module
SAS
BladeCenter
connectivity
Boot Disk System
module
SAS fabric
Chapter 6. Installing the operating system
Network
Storage
Manager
Management station
57
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