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128 iSeries and AS/400e System Builder
4.5 Supported upgrades for the Model 270
All upgrades to, from, and within the 270 systems are withdrawn from marketing. Refer to the
Upgrade topic in the Find and Compare Tool (FACT) at the following Web site to determine
the supported upgrade paths for a given processor:
http://www-919.ibm.com/servers/eserver/fact/
#5703 #5703 PCI-X RAID Disk Unit Controller
The #5703 PCI-X RAID Disk Unit Controller is an Ultra3 SCSI controller with a cache size of 40 MB that provides RAID-5
protection for internal disks and internal tape units, CD-ROM, DVD-RAM and DVD-ROM units. The #5703 has two Ultra3
SCSI buses.
In addition to providing RAID-5 protection for disks, the #5703 is designed to work as a high performance controller for
disks protected by system mirroring or disks with no protection. In the RAID-5 configuration, disk unit protection is provided
at less cost than mirroring, and with better performance than system checksums.
The #5703 controller supports a maximum of 12 disk units.
Due to a system unit and external tower disk unit cage SCSI bus designs, only the 270 Models, and the #0595/#5095 PCI-X
Expansion Tower have a suitable system configuration to allow 12 disk units to attach to a single #5703. All other system
unit tower disk configurations restrict the number of attaching disk units to 10 or less.
A minimum of three disk units of the same capacity are needed for a valid RAID-5 configuration. A maximum of four arrays
are allowed per controller, with a maximum of 12 disk units allowed per array. All disk units in an array must be of the same
capacity. Parity is spread across either two, four, or eight disk units in an array. If an array of three disk units is started,
parity is spread across two disk units. If an array of four to seven disk units is started, parity is spread across four disk units.
If an array of 8-12 disk units is started, parity is spread across eight disk units.
The number of arrays and size of each array can be influenced by specifying an optimization of Balance, Performance, or
Capacity when starting arrays in iSeries Navigator. An optimization of Balance is used by default when starting arrays from
the green screens. If disk units are included in an existing array, parity can be spread across less than the preferred number
of disk units. In this case, RAID function must be stopped and then started to redistribute the parity.
The #5703 controls up to two removable media devices (internal tape, CD-ROM, DVD-RAM, DVD-ROM). The #5703 does
not support the attachment of external devices.
When used as a Direct Attached Adapter for Linux, the #0628 should be ordered in place of the #5703.
Minimum operating system level: OS/400 V5R2
The #5703 is a Customer Install Feature.
A #5703 is the recommended replacement for the #2782 PCI-X RAID Disk Unit Controller.
#5704 #5704 PCI-X Fibre Channel Tape Controller
The #5704 PCI-X Fibre Channel Tape Controller provides Fibre Channel attachment capability for external tape devices.
The #5704 supports point-to-point and arbitrated loop topologies and has an LC-type cable connector. Each #5704 is
shipped with a wrap connector (part number 05N6767). The #5704 supports 64-bit, 133 MHz PCI-X bus speeds.
All Fibre Channel cables required for the #5704 PCI-X Fibre Channel Tape Controller are supplied by the client.
The #5704 does not support the Alternate IPL device function. A D-mode IPL is required using CD-ROM, DVD-ROM, or
another alternate IPL tape device. Then select a #5704 to complete the installation or recovery process.
Minimum operating system level: OS/400 V5R2
The #5704 is a Customer Install Feature.
The #5704 is the PCI-X card replacement for the #2765 PCI Fibre Channel Tape Controller.
#9767 #9767 Base PCI Disk Unit Controller
The #9767 is disk unit and removable media device controller that provides Ultra2 SCSI attachment capability. The #9767
does not support RAID. The #9767 is the default controller in the Model 270 and controls up to six disk units and up to two
removable media devices (internal tape, CD-ROM, DVD, or all three) in the system unit. The #9767 can control up to four
disk units when installed in a #5075 PCI Expansion Tower.
If RAID-5 is required or there are more than six drives, the #2763, #4748, or #4778 disk controller is required.
The #9767 was withdrawn from marketing on 21 November 2003.