Use this procedure to help you to install an HA configuration
for two systems that both have JBOD-formatted disks.
To avoid problems during installation, follow the steps exactly
as written.
Attention: Consider using an HA two-system
RAID configuration rather than an HA two-system JBOD configuration
due to the increased redundancy, performance, and reliability provided
by the RAID subsystem.
Attention: Both controllers
must have the High-Availability Mode option set to JBOD before being
connected to the disk drives, all of the disk drives must be formatted
to JBOD (JBOD block size per sector) format, and the correct cabling
must be used. Remove any devices from the disk expansion drawer that
are not set to JBOD or reformat them to JBOD block size per sector.
- Install and update the iprutils package on each system
or partition. See Updating the iprutils package for
more information.
- Power off the system or partition and install the SAS controllers
into the system or partition. If you do not want to power
off the machine or partition, Linux hot
plug can be used to install the SAS controllers without powering off
the system or partition.
Attention: Do not attach any cables
to the SAS controllers at this time.
- Update each controller to the latest SAS controller microcode
from the code download Web site. See Updating the controller microcode.
- To prevent errors while connecting the cables, configure
the SAS controllers to the HA two-system RAID configuration before
attaching any cables to the SAS controllers:
- Run the iprconfig command.
- Type 7 to select Work with adapter
configuration.
- Use the up/down arrow keys to move the cursor to the
SAS controller and type 1; then press Enter
to select it.
- In the menu option titled Change Configuration of
Adapter, configure Preferred Dual Adapter State to None
and High-Availability Mode to JBOD.
- Attach an AE cable from the shared disk expansion drawer
to the same SAS connector on each controller. To see examples
of how to cable the HA configurations, see Serial
attached SCSI cable planning.
- Power on the system or partition if it was powered off.
Verify that the cabling and functioning of the controllers are correct
by using the Display Hardware Status screen. Each SAS controller
in dual-initiator configuration should show an optional block of Remote
Adapter information for the other SAS controller.
- Run the iprconfig command.
- Type 1 to select Display Hardware
Status.
- Use the up/down arrow keys to move the cursor to the
SAS controller and type 1; then press Enter
to select it. An optional block of Remote Adapter information
for the other SAS controller in the remote system or partition is
shown in the bottom of the IOA Hardware Resource Information Details screen,
similar to the following:
+------------------------------------------------------------------------------+
| IOA Hardware Resource Information Details |
| |
| |
|Manufacturer . . . . . . . . . . . . . . : IBM |
|Machine Type and Model . . . . . . . . . : 572B001SISIOA |
|Firmware Version . . . . . . . . . . . . : 03200046 |
|Serial Number. . . . . . . . . . . . . . : 07125793 |
|Part Number. . . . . . . . . . . . . . . : 0000042R4591 |
|Plant of Manufacturer. . . . . . . . . . : 0022 |
|Cache Size . . . . . . . . . . . . . . . : 175 MB |
|DRAM Size. . . . . . . . . . . . . . . . : 0EE MB |
|Resource Name. . . . . . . . . . . . . . : /dev/sg20 |
| |
|Physical location |
|PCI Address. . . . . . . . . . . . . . . : 0002:00:01.0 |
|SCSI Host Number . . . . . . . . . . . . : 1 |
| |
|Current Dual Adapter State . . . . . . . : Primary |
|Preferred Dual Adapter State . . . . . . : No Preference |
|Remote Adapter Manufacturer. . . . . . . : IBM |
|Remote Adapter Machine Type And Model. . : 572B001SISIOA |
|Remote Adapter Serial Number . . . . . . : 07125687 |
| |
|Current Asymmetric Access State. . . . . : Disabled |
| |
| |
|Press Enter to Continue |
| |
|e=Exit q=Cancel |
+------------------------------------------------------------------------------+
