IBM DCS9550 1S1 Drive Carrier Module, SATA Dual Path Transition Card, Drive Status Indicators

Introduction

1.2.4Drive Carrier Module

The Drive Carrier Module comprises a hard disk mounted in a carrier. Each drive bay can house a single Low Profile

1.0inch high, 3.5 inch form factor disk drive in its carrier. The carrier has mounting locations for ATA or FC-AL drives.

Each disk drive is enclosed in a die-cast aluminum carrier which provides excellent thermal conduction, radio frequency, and electro-magnetic induction protection and affords the drive maximum physical protection.

The front cap also supports an ergonomic handle which provides the following functions:

•Camming of carrier into and out of drive bays.

•Positive 'spring loading' of the drive/backplane connector.

•An anti-tamper lock operated by a torx socket type key.

Figure 1–9Drive Carrier Module

1.2.4.1SATA Dual Path Transition Card

For SATA drives, a SATA dual path transition card is used in place of a SATA - PATA transition card. This is attached to the rear of each drive to provide a SCA-2 interface to the drive carrier using the same pins as Fibre Channel. In addition, the card provides a SATA path switch (1.5Gb/s) suitable for dual redundant I/O module applications.

1.2.4.2Drive Status Indicators

Each drive carrier incorporates two indicators, an upper (Green) and lower (Amber). In normal operation the green indicator will be ON and will flicker as the drive operates.The amber indicator is OFF during normal operation and ON if there is a drive fault present.

8 IBM System Storage DCS9550 1S1 Storage Expansion Unit Installation, Service, and User Guide