IBM DS6000 Series manual Adding multipath volumes to iSeries using 5250 interface

BUS a

BUS b

FC IOA

FC IOA

FC IOA

FC IOA

BUS x

BUS y

Volumes 1-24

Volumes 25-48

Controllers and Host Adapters

iSeries IO Towers/Racks

Logical connection

Figure B-24 Example of multipath with iSeries

Figure B-24shows an example where 48 logical volumes are configured in the DS6000. The first 24 of these are assigned via a host adapter in the top controller card in the DS6000 to a Fibre Channel I/O adapter in the first iSeries I/O tower or rack. The next 24 logical volumes are assigned via a host adapter in the lower controller card in the DS6000 to a Fibre Channel I/O adapter on a different BUS in the first iSeries I/O tower or rack. This would be a valid single path configuration.

To implement multipath, the first group of 24 logical volumes is also assigned to a Fibre Channel I/O adapter in the second iSeries I/O tower or rack via a host adapter in the lower controller card in the DS6000. The second group of 24 logical volumes is also assigned to a Fibre Channel I/O adapter on a different BUS in the second iSeries I/O tower or rack via a host adapter in the upper controller card.

Adding multipath volumes to iSeries using 5250 interface

If using the green screen 5250 interface, sign on to SST and perform the following steps as described in “Using 5250 interface” on page 332.

1.Option 3, Work with disk units.

2.Option 2, Work with disk configuration.

3.Option 8, Add units to ASPs and balance data.

You will then be presented with a panel similar to Figure B-25 on page 346. The values in the Resource Name column show DDxxx for single path volumes and DMPxxx for those which have more than one path. In this example, the 1750-A85 logical volume with serial number 75-1118707 is available through more than one path and reports in as DMP135.

4.Specify the ASP to which you wish to add the multipath volumes.

Appendix B. Using the DS6000 with iSeries 345