Compaq AA-RHGWC-TE Host Bus Adapter Restrictions, Fibre Channel Requirements and Restrictions

each Memory Channel adapter on one system must be connected to the same linecard in each Memory Channel hub.

2.3 Host Bus Adapter Restrictions

To connect a member system to a shared SCSI bus, you must install a host bus adapter in an I/O bus slot.

The Tru64 UNIX operating system supports a maximum of 64 I/O buses. TruCluster Server supports a total of 32 shared I/O buses using KZPSA-BB host bus adapters, KZPBA-CB UltraSCSI host bus adapters, or KGPSA Fibre Channel host bus adapters.

The following sections describe the host bus adapter restrictions in more detail.

2.3.1 Fibre Channel Requirements and Restrictions

The following requirements and restrictions apply to the use of Fibre Channel with TruCluster Server Version 5.1:

•The HSG60 and HSG80 require Array Control Software (ACS) Version 8.5 or later.

•Eight member systems may be connected to common storage over Fibre Channel in a fabric (switch) configuration.

•The Fibre Channel RAID Array 8000 (RA8000) midrange departmental storage subsystem and Fibre Channel Enterprise Storage Array 12000 (ESA12000) house two HSG80 dual-channel controllers. There are provisions for six UltraSCSI channels. A maximum of 72 disks is supported.

•The StorageWorks Modular Array 6000 (MA6000) is built with the new StorageWorks packaging, which consists of:

– A Compaq StorageWorks enclosure Model 2100, which houses dual-redundant HSG60 controllers.

– The 14-bay drive shelves (Compaq StorageWorks enclosure Model 4200).

The Model 2100 enclosure with HSG60 controllers supports two SCSI buses, which may be:

– Two drive shelves (Model 4214R) with up to 12 disk drives each. The

drive shelves use single-bus mode (one SCSI bus per drive shelf).

– One drive shelf (Model 4254) with up to 14 disk drives. The drive shelf uses dual-bus mode (two SCSI buses, each with 7 disk drives).

Hardware Requirements and Restrictions 2–5