POWER7 information

Internal disk drive sharing for the 8248-L4T, 8408-E8D, or 9109-RMD

You might require to cable and understand the function of this feature. Use the following information to complete these tasks.

Review the disk drive modes and supported disk drive locations, as shown in Table 1. The following figure shows the disk drive locations for the 8248-L4T, 8408-E8D, or 9109-RMD.

Figure 1. Disk drive locations

Table 1. Disk drive modes and supported disk drive locations
Disk drive mode	SAS port card	Adapter	SAS cable	Disk drive location
Dual RAID of internal drives	None	Integrated Dual RAID controller	None	D1, D2, D3, D4, D5, and D6
Dual RAID of internal and external drives	SAS External Port feature (FC 1819) - SAS Cable Assembly for SAS Port	Integrated Dual RAID controller	YI Cable (FC 3686) - System to SAS Enclosure, Single Controller/Dual Path 1.5 meter YI Cable (FC 3687) - System to SAS Enclosure, Single Controller/Dual Path 3 meter	D1, D2, D3, D4, D5, and D6
Dual Split Backplane	None	Integrated SAS controller (SAS A) Integrated SAS controller (SAS B)	None	D1, D2, and D3 D4, D5, and D6
Triple Split Backplane	SAS Internal Port feature (FC1815) - SAS Cable for triple split disk drive backplane	Integrated SAS controller (SAS A) Integrated SAS controller (SAS B) (FC 5901) - PCIe Dual-x4 SAS Adapter	AI Cable (FC 3679) - Adapter to Internal drive 1 meter	D1 and D4 D2 and D5 D3 and D6

The following information is for use after the FC 5901 SAS Storage Adapter is installed. Install the adapter and then return here. For instructions, see, PCI adapters.

You should also review the tasks in Before you begin if you have not already done so.

This feature allows you to split the internal disks in the system unit enclosure into groups which you can manage separately.

Stop and power off the system if it is not already. For instructions, see Stopping the system or logical partition.
Cable a single system unit enclosure by doing the following:
1. Attach the cable to the SAS port on the rear bulkhead of the system unit enclosure to the top port in the SAS Storage Adapter, as shown in the following figure.
  Restriction: Internal disk drive sharing is only available when internal cable feature FC 1815 is installed from the DASD backplane to the read bulkhead of the system unit enclosure. Also, feature FC 5662 175 MB cache RAID - dual IOA enablement card must not be installed. The SAS Storage Adapter can be in any of the other slots that support it.
2. Secure any extra cable.
Start the system. For instructions, see Starting the system or logical partition.
Verify that the feature is installed and working. For instructions, see Verifying the installed part.

With this function installed, 2 of the 6 of the disks in the system enclosure can be managed by the SAS Storage Adapter.

Note: The Removable Media device is always controlled by a separate embedded SAS controller on the system planar.

Now, you can manage the disks as you would manage any other disks.

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Last updated: Thu, November 20, 2014