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Related concepts
"Verifying the controller software" on page 17
Verify the minimum software support that is required for your specific controller.
"PCI-X SAS RAID card comparison" on page 3
Use the table in this topic to compare the features of PCI-X SAS RAID cards for IBM i. There are also
images of adapters for you to view.
"PCIe SAS RAID card comparison" on page 6
Use the table in this topic to compare the features of a PCI Express (PCIe) SAS RAID cards for IBM i.
There are also images of adapters for you to view.
"Dual storage IOA access optimization" on page 26
View the active or passive path of your disk units and controller.
Dual storage IOA function attributes
Find out which controller functions are supported with dual storage IOA configurations.
Table 6. SAS controller functions. This table describes controller functions that are supported with dual storage IOA
configurations.
Controller functions
Disks formatted to 512 bytes per sector
Disks formatted to 528 bytes per sector
Mirrored write cache between controllers that have write
cache
Mirrored RAID parity footprints between controllers
Dual paths to disks
System-level mirroring
IBM-qualified disk drives
IBM-qualified disk expansion drawers
Tape or optical devices
Load source capable
2
Operating mode
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:
24
SAS RAID controllers for IBM i
Dual storage IOA configurations
1
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Primary or secondary adapter
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