Chapter 4. IBM iSeries 270 models 121
#2749 #2749 PCI Ultra Magnetic Media Controller
The #2749 is an Ultra SCSI IOA that provides attachment capability for external tape devices and external optical devices.
The #2749 can attach one tape drive or one optical drive. The following tape devices can be attached:
3490E E01/E11 ½-inch cartridge tape subsystem
3490 F00/F01/F11/F1A ½-inch cartridge tape subsystem
3490E C11/C22/C1A/C2A with feature #5040
3494 Tape Library Dataserver
– L10 Library Control Unit Frame 1 3490E C1A/C2A with #5040 or 1-2 3490E F1A
– L12 Library Control Unit Frame 1-2 3590 B1A
– D10 Device Frame 1 3490E C1A/C2A with #5040 or 1-2 3490E F1A, 300 cartridges
– D12 Device Frame 1-6 3590 B1A, 300 cartridges
– HA1 (High Availability)—2 L1X and 2 D1X for redundancy
3570 0.31-inch Cartridge Tape Subsystem
– Model B0x (stand-alone)
– Model B1x (rack mount)
– Model B1A(mounts in 3575)
– Model C0x (stand-alone)
– Model C1x (rack mount)
– Model C1A(mounts in 3575)
3575 0.31-inch Cartridge Tape Subsystem
– Model Lxx
3580-H11 Ultrium Tape Drive
3580-H23 Ultrium Tape Drive
3581-H17 Ultrium Tape Autoloader
3583-Lxx Ultrium Scalable Tape Library
3584-L32 or D32 Ultrascalable Tape Library
3590 ½-inch Cartridge Tape Subsystem
– Model E11/B11 (mounts into 9309 rack)
– Model E1A/B1A (mounts into 3494 library)
3995 Optical Library Dataserver - Model Cxx
7208-012 5.0 GB 8 mm cartridge tape unit
7208-222 7.0 GB 8 mm cartridge tape unit
7208-232 8 mm Dual 5.0 GB cartridge tape subsystem
– #0501 counts as one 7208
– #0502 counts as two 7208s
7208-234 8 mm Dual 7.0 GB cartridge tape subsystem
– Counts as two 7208s
7208-342 20.0 GB 8 mm Cartridge Tape Bridge Box
9348-00x ½-inch Reel Tape Unit—Rack Mount
9427-2108 8 mm Library Attach
To attach tape devices with LVD connections, use the #5702 PCI-X Ultra Tape Controller.
Minimum operating system level: OS/400 V4R5
The #2749 is a Customer Install Feature.
The #2749 was withdrawn from marketing on 03 March 2005.
#2757 #2757 PCI-X Ultra RAID Disk Controller
The #2757 PCI-X Ultra RAID Disk Controller is a PCI-X SCSI controller with a maximum compressed write cache of
757 MB. The #2757 provides RAID-5 protection for internal disks and also supports internal tape units, CD-ROM and
DVD-RAM. The #2757 has four SCSI buses that support up to 18 disk units. Hardware data compression is not supported.
In addition to providing RAID-5 protection for disks, #2757 is designed to work as a high performance controller for disks
protected by system mirroring or disks with no protection.
The #2757 controller supports a maximum of 20 disk units. A minimum of three disk units of the same capacity are needed
for a valid RAID-5 configuration. A maximum of six arrays are allowed per controller, with a maximum of 18 disk units
allowed per array. All disk units in an array must be of the same capacity.
Parity is spread across either 2, 4, 8, or 16 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
eight to 15 disk units is started, parity is spread across eight disk units. If an array of 16 to 18 disk units is started, parity
is spread across 16 disk units.
