The IBM 2104 Expandable Storage Plus (Exp Plus) disk enclosure provides low-cost disk storage for RS/6000 or pSeries servers, depending upon the model.

The IBM 2104 Model TU3 is a tower (stand alone) model with 14 disk drive bays, 1,027 GB maximum capacity, and up to 2 Ultra3 SCSI interface/ports.

HIGHLIGHTS

• Accommodate up to 14, high-performance, hot-swappable, SCSI drives
• Provide up to 1,027.6 GB capacity with a combination of 9.1, 18.2, 36.4 and 73.4 GB disk drives
• Features up to 160 MB/second synchronous data throughput when attached to an Ultra3 adapter -- twice as fast as previous models

Support a variety of adapters and native ports on pSeries and RS/6000 systems within single or two-host (single or split-bus) configura IBM's Expandable Storage Plus (Exp Plus) disk enclosure line now provides greater capacity, more connectivity options (including Ultra3 LVD), and higher performance -- all at an affordable price. If you rely on IBM eServer pSeries and RS/6000 servers and require external SCSI disk capacity, this may be the disk enclosure you've been waiting for.

High Capacity and Performance

• Accommodates up to 14 hot-swappable, IBM Ultra3 (LVD) drives
• Provides up to 1,027.6 GB capacity with a combination of 9.1, 18.2, 36.4 and 73.4GB disk drives
• Performs at speeds of up to 160 MB/sec when attached to an Ultra3 host adapter or system port, or up to 80 MB/sec when attached to an Ultra2 host adapter or system port. Ultra and Fast/Wide speeds are also supported
• Reports problems to your server(s) at customer-selectable intervals using SCSI Enclosure Services
• For Telco customers, a -48 V DC power supply option is available

Multiple Configurations for Varied Requirements

• Single Host: Up to 14 disk drives to meet large capacity requirements
• Two Host, Single Bus: Up to 12 drives for non-concurrent usage -- providing HACMP server failover support (with PCI Dual Channel Ultra2 SCSI Adapter # 6205)
• Two Host, Dual Bus: Each bus supports up to seven drives
• Combine with the IBM PCI, 4-channel, Ultra SCSI RAID adapter for high performance and data protection

The DU3 model is designed to be rack mounted and is ideal for use with multiple servers, while the TU3 is a stand-alone tower perfect for single server storage. Both come with your choice of a redundant power source or a cooling fan.

IBM's Expandable Storage Plus (Exp Plus) is designed to meet the needs of many different types of customers, including those customers who want:

• Stand-alone storage for a single server
• Rack-mounted storage for several servers
• To use SCSI technology as the connectivity option

Exp Plus provides the following at an attractive price:

• Excellent performance
• High availability (when combined with a RAID-based host bus adapter)
• Enclosure services to ensure that problems are reported to the server (at customer-selectable intervals)

The TU3 model supports up to 14 of IBM's latest 10K 9.1, 18.2, 36.4 and 73.4 GB Ultra3 SCSI disk drives. These drives can be mixed together in the same enclosure. When connected to a RAID host bus adapter, such as the Ultra3 SCSI RAID Adapter, data protection and high performance are possible.

Performance of the TU3 model can reach up to 160 MB/sec (Ultra3) synchronized data transfer speeds when attached to an Ultra3 host adapter or system port. These models will operate at up to 80 MB/sec when attached to Ultra2 hosts. Ultra and Fast Wide speeds are also supported.

A number of SCSI bus configurations are supported by the Exp Plus TU3 model. When attached to a single host system, up to 14 disk drives can be configured in an Exp Plus to meet large capacity requirements.

In a dual host environment (using feature number 2635), the SCSI bus can also be configured as two separate buses, each supporting up to 7 disk drives attached to two independent host connections.

Exp Plus uses either a single AC power supply and a fan unit, or dual AC power supplies for redundancy. For telco customers, -48V DC power supplies can be selected in place of AC supplies. The -48 V DC power supply is available on the drawer model (2104-DU3) only. The Exp Plus can be mounted into one of several racks, including the 7104-S00, 7014-T00, 7014-T42, 7015-R00, and the 2101-100. A tower (stand-alone model TU3) option is available as well. The TU3 model implements SCSI Enclosure Services (SES). Using 73.4 GB disk drives, Exp Plus can support up to 1,027.6 GB of unprotected disk storage. If you use RAID technology with the Exp Plus models, you can benefit from increased data protection. However, RAID technology requires increased space (depending on the RAID level you select).

Hardware Requirements

The IBM Expandable Storage Plus attaches to RS/6000 servers with the following adapters:

• PCI 3-Channel Ultra2 SCSI RAID Adapter (#2494)
• PCI 4-Channel Ultra3 SCSI RAID Adapter (#2498)
• PCI Dual Channel Ultra3 SCSI Adapter (#6203)
• PCI Dual Channel Ultra2 SCSI Adapter (#6205)
• PCI Single Ended Ultra SCSI Adapter (#6206)
• PCI SCSI-2 Fast/Wide Single Ended Adapter (#6208)