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150 DS8000 Series: Concepts and Architecture
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.
8.4 Host 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.
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
8.4.1 Attaching 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
Note: There is no SCSI attachment support for the DS8000 storage unit.