IBM SAS RAID controllers, Manual

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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
1
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
2
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
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