IBM 88861TU, Planning Manual

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Volumes are typically defined as either data volumes, which are used to store
application date, or boot volumes, which are used to store the operating system
image. For each volume, you need to determine the following characteristics:
v
The size (in GBs)
v
The blade server or servers that will have access to the volume
v
Any applications on the blade servers that need access to the volume
v
After defining this information, you can use the “SAS RAID controller module
configuration worksheet” on page 103 to record your decisions.
Zone for SAS RAID controller modules
A single predefined zone configuration is available for the SAS RAID controller
module. All blade servers can access both SAS RAID controller modules, and the
SAS RAID controller modules have access to the hard disk drives in both storage
modules.
This configuration should be acceptable for most environments. Access to specific
storage volumes is controlled by enabling host access to each volume using one of
the management interfaces.
Replacing SAS connectivity modules with SAS RAID controller
modules
If you are currently using SAS connectivity modules and you want to replace them
with SAS RAID controller modules, make sure that you back up your existing data
before you install the SAS RAID controller modules.
Note: If you are going to implement SAS RAID controller modules, make sure that
you have SAS hard disk drives installed in any attached storage modules. The use
of SATA hard disk drives is not supported with SAS RAID controller modules.
Perform these steps to replace SAS connectivity modules with SAS RAID controller
modules:
1. Back up all data that is currently stored on the hard disk drives. For example,
you can use SAMBA or an NFS mount through the operating system to back
up data.
2.
Shut down the operating system on all blade servers that access the hard disk
drives.
3. Disconnect the BladeCenter S chassis from all power sources.
4. Remove the SAS connectivity modules from I/O module bays 3 and 4.
5. Install the battery backup units in the media tray.
6. Install the SAS RAID controller modules.
Note: Remember that you must replace any SATA hard disk drives with SAS
hard disk drives.
7.
Connect the BladeCenter S chassis to power.
8. Configure the SAS RAID controller modules and integrated shared storage by
creating storage pools, creating volumes, and mapping volumes to blade
servers. You can use Storage Configuration Manager to configure your
integrated shared storage.
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BladeCenter S Type 7779/8886: Planning Guide