To Next Page

To Previous Page

Dual storage IOA function attributes

Find out which controller functions are supported with dual storage IOA configurations.

Table 9. SAS controller functions. This table describes controller functions that are supported with dual storage IOA

configurations.

Controller functions Dual storage IOA configurations

Disks formatted to 512 bytes per sector No

Disks formatted to 528 bytes per sector Yes

Mirrored write cache between controllers that have write

cache

Yes

Mirrored RAID parity footprints between controllers Yes

Dual paths to disks Yes

System-level mirroring Yes

IBM-qualified disk drives Yes

IBM-qualified disk expansion drawers Yes

Tape or optical devices No

Load source capable Yes

Operating mode

Primary or secondary adapter

1. Disks formatted to 512 bytes per sector are not to be used functionally, but these disks can be formatted to 528

bytes per sector.

2. The operating mode can be viewed by using the Auxiliary Storage Hardware Resource Detail display.

Viewing dual storage IOA attributes

This topic collection provides the details for using the Auxiliary Storage Hardware Resource Detail

display to obtain dual storage I/O adapter (IOA) configuration information.

Perform the following steps to view details about your adapters.

1. Select Start a service tool on the Use System Service Tools (SST) menu.

2. Select Hardware service manager on the Start a Service Tool menu.

3. Select Logical hardware resources (buses, IOPs, controllers) on the Hardware Service Manager menu.

4. Select System bus resources on the Logical Hardware Resources on the System Bus menu.

5. Type 9 (Resources associated with IOP) in front of the adapter that you want.

6. Type 5 (Display detail) in front of Storage IOA to get details about the storage IOA. This is an

example of the display:

SAS RAID controllers for IBM i 25

IBM SAS RAID controllers User Manual

Questions and Answers: