Compaq Confidential – Need to Know Required
Writer:
Patrick Waychoff
Project:
Modular Array Configuration Guide
Comments:
Part Number:
EK-MACON-CA. A01
File Name:
EK-MACON-CA-A01.doc
Last Saved On:
4/3/00 3:52 PM
Modular Array Configuration Guide
Introduction
The purpose of this configuration guide is to list the components that have
been qualified in and can be installed in RETMA cabinets. The predefined and
Configure-To-Order solutions are assembled in the Modular Storage Cabinets.
These cabinets include Power Distribution Units and are pre-cabled.
The Series 9000 cabinets are available in three heights: 42U, 36U and 22U.
The top gun blue RETMA cabinet is available in a 41U height.
Single-Bus Mode or Dual-Bus Mode
The HSG80 controller firmware (ACS 8.5) can address up to 12 drives per
UltraSCSI bus. In single-bus mode this means that 12 of the 14 drive bays are
used. The 2 extra drive bays can be used for in-cabinet inventory. In dual-bus
mode the firmware can see seven drives on each bus allowing use of all 14
drives.
The Model 4214R disk enclosure is a single-bus enclosure that has slots for 14
drives. It supports 12 drives in single bus mode. It does not support daisy
chaining between shelves.
The Model 4254 is a dual-bus enclosure that has slots for 14 drives. It supports
seven drives per bus, for a total of 14 drives.
Table 1 describes the advantages and disadvantages between single-bus and
dual-bus mode.
