IBM DS8000 manual Host attachment, Attaching to open systems hosts, Cooling the storage complex

Cooling the storage complex

Adequate airflow needs to be maintained to ensure effective cooling. You can take steps to optimize the air circulation and cooling for your storage units.

To optimize the cooling around your storage units, prepare the location of your storage units as recommended in the following steps:

1.Install the storage unit on a raised floor. Although you can install the storage unit on a non-raised floor, installing the storage unit on a raised floor provides increased air circulation for better cooling.

2.Install perforated tiles in the front and back of each base model and expansion model as follows:

a.For a stand-alone base model, install two fully perforated tiles in front of each base model and one partially perforated tile at the back of each base model.

b.For a row of machines, install a row of perforated tiles in front of the machines and one or two fully perforated tiles at the back of each two machines.

c.For groupings of machines, where a hot aisle/cold aisle layout is used, use a cold aisle row of perforated tiles in front of all machines. For hot aisles, install a perforated tile per pair of machines.

8.4Host attachment

The DS8000 storage unit provides a variety of host attachments so that you can consolidate storage capacity and workloads for open systems hosts, S/390 hosts, and eServer zSeries hosts.

Note: There is no SCSI attachment support for the DS8000 storage unit.

The DS8100 Model 921 supports a maximum of 16 host adapters and 4 device adapter pairs and the DS8300 Models 922 and 9A2 support a maximum of 32 host adapters and 8 device adapter pairs.

You can configure the storage unit for any of the following system adapter types and protocols:

￿Fibre channel adapters, for support of Fibre Channel protocol (FCP) and fibre connection (FICON) protocol

￿Enterprise Systems Connection Architecture® (ESCON) adapters

8.4.1Attaching to open systems hosts

You can attach a DS8000 storage unit to an open systems host with Fibre Channel adapters.

Fibre Channel is a 1 Gbps or 2 Gbps, full-duplex, serial communications technology to interconnect I/O devices and host systems that are separated by tens of kilometers.

The IBM TotalStorage DS8000 series supports 1 Gbps and 2 Gbps connections. The DS8000 series negotiates automatically and determines whether it is best to run at 1 Gbps link or 2 Gbps link.

Fibre channel connections are established between Fibre Channel ports that reside in I/O devices, host systems, and the network that interconnects them. Each storage unit Fibre

150DS8000 Series: Concepts and Architecture