External SCSI Storage Enclosure offers U320 support.

Press Release Summary:



Model EXP400 is a high-density SCSI storage expansion unit intended to work in rack or tower. It can support up to 14 Ultra-320 SCSI drives, with up to 320 MB/s data transfer speeds, on single logical bus. Unit supports redundant and hot pluggable power supplies and fans. Internal system management supports error LED indications for power supplies, fans, disk drives, and SCSI Bus Expander and Enclosure Services Module.



Original Press Release:



IBM EXP400 External SCSI Storage Enclosure with latest SCSI Technology Offers U320 Support for Higher Performance



At a glance
Expand the storage capacity of your system beyond the physical limitations of the server
o High-speed Ultra320 SCSI slim-high HDDs with up to 320 MB/s data transfer speeds
o 14 hot-swap, slim-high bays allowing up to 2 TB of data storage
o One ESM standard, second ESM optional in 1RU and 1RX models
o Two ESMs standard in 2RX models
o Supports twin-tail or split bus - two servers can access data
o Redundant power supplies
o Redundant cooling with hot-swap fans
o Supports IBM U320 HDD tray (same as systems)

Overview
EXP400 External SCSI Storage Enclosure is a high-function, high-density SCSI storage expansion unit intended to work in a rack or tower. It can support up to 14 Ultra-320 SCSI drives on a single logical bus.

It supports high availability functions such as redundant and hot pluggable power supplies and fans.

Internal system management supports error LED indications for power supplies, fans, disk drives, and SCSI Bus Expander and Enclosure Services Module (ESM).

External system management is supported via the SCSI Accessed Fault-Tolerant Enclosures (SAF-TE) interface on the SCSI bus. Shared SCSI buses are supported for twin-tailed clustering solutions.

EXP400 External SCSI Storage Enclosure supports easy customer servicing. Most replaceable items and components are easily accessible for replacement from either the front or the back.

The EXP400 External SCSI Storage Enclosure SCSI Bus Expander and Enclosure Services Module allows LVD signaling and Ultra-320 (up to 320 MB/s) speed data transfers to the drives, up to double the maximum data rate of the EXP300 Storage Unit.

The EXP400 External SCSI Storage Enclosure is available in three models:

EXP400 Storage Expansion Unit (1733-1RU)
Two U.S.-style 110-volt line cords
Two 220-volt PDU line cords
One ESM standard
English publications

EXP400 Storage Expansion Unit (1733-1RX)
Two 220-volt PDU line cords
Two country-dependent line cords
One ESM standard
English publications

EXP400 Storage Expansion Unit (1733-2RX)
DC power requiring 48 volts dc at 10.3 amperes peak supply
Two ESMs standard
English publications
Optional SCSI Bus Expander and Enclosure Services Module (ESM) (59P5018)

The Optional ESM allows the EXP400 to support twin tailing and clustering.

Twin tailing extends the sharing of the EXP400 to two servers.

Clustering increases data availability in case of server failure.

Key prerequisites
A supported server

Planned availability date
September 19, 2003

Description
Protect your business-critical data economically by installing an EXP400 External SCSI Storage Enclosure to handle your data storage applications.

EXP400 External SCSI Storage Enclosure supports up to 14 slim-high, hot-plug Ultra-320 disk drives.

It comes with a single backplane that supports two independent SCSI channels of up to seven disk drives each. However, in twin-tailed, clustered environments utilizing dual host controllers cabled separately to EXP400 External SCSI Storage Enclosure, only a single logical bus of 14 drives is supported.

Optional VHDCI to VHDCI external SCSI cables are supported between the SCSI controller and the EXP400 External SCSI Storage Enclosure SCSI box. EXP400 External SCSI Storage Enclosure will ship standard with one 2m SCSI cable.

The EXP400 External SCSI Storage Enclosure SCSI hot-swap backplane supports only SCA-2 direct dock disk drives. The drive options come complete with the new non-interposer drive tray. It will come with a set of 14 "dummy" drive bezels standard. These must be removed as drive options are loaded into the EXP400 External SCSI Storage Enclosure.

Two 500-watt, hot-pluggable redundant power supply/fan units are standard in the 1733-1RU and 1733-1RX. The two fans are redundant such that a single fan can provide adequate cooling for the EXP400 External SCSI Storage Enclosure. A single power supply supports up to 14 slim-high, high-performance disk drives. The small fan at the rear of the PSU comes on only if the primary fan in the other PSU fails. This is to prevent the backflow of air into the PSU.

The EXP400 External SCSI Storage Enclosure ships with only a single ESM installed in 1RU and 1RX models. A blank covers the hole where the second ESM module would normally reside. The second ESM is now optional. Model 2RX ships with two ESMs installed.

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