Magnetic Media Controllers 397
Magnetic Media Controllers
enabled by moving a jumper on the IOA. The #2748 supports Extended Adaptive Cache with
restriction that compression must not be active on the same #2748 subsystem.
The #2748 is designed to control Ultra2, Ultra, and Fast Wide SCSI disk units. It supports up
to 15 disk units (10 if installed on a model 170), one CD-ROM, and one internal tape unit. In
addition to RAID-5 and compression, the #2748 is also 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 a lower cost than mirroring. This
feature supports Concurrent DASD Add/Maintenance. Note the following additional points:
• The #2748 is a replacement for the #2741.
• The #2748 requires a V4R4 or later operating system.
• High Speed PCI Card slots required: One.
• This feature is CE
installation only
.
#2749 PCI Ultra Magnetic Media Controller
The #2749 is an Ultra SCSI controller for attachment of an external tape device or an external
optical device.
Devices supported by #2749:
• 3490E
– C11/C22/C1A/C2A ½-inch Cartridge Tape Subsystem with #5040
– E01/E11 ½-inch Cartridge Tape Subsystem
– F00/F01/F11/F1A ½-inch Cartridge Tape Subsystem
• 3494
– L10 ½-inch Cartridge Tape Library Control Unit Frame (one 3490E-C1A/C2A with
#5040 or one or two 3490E-F1A)
– L12 ½-inch Cartridge Tape Library Control Unit Frame (one or two 3590-B1A)
– D10 ½-inch Cartridge Tape Library Device Frame (one 3490E-C1A/C2A with #5040 or
one or two 3490E-F1A)
– D12 ½-inch Cartridge Tape Library Device Frame (one to six 3590-B1A)
• 3570
– B00/B01/B02/B11/B12/B1A Cassette Tape Subsystem
– C00/C01/C02/C11/C12/C1A Cassette Tape Subsystem
• 3575-L06/L12/L18/L24/L32 ½-inch Cartridge Tape Subsystem
• 358x-Hxx Tape Cartridge System
• 3590-B11/B1A/E11/E1A ½-inch Cartridge Tape Subsystem
• 3995-C40/C42/C44/C46/C48 Optical Library Dataserver
• 7208-012/222/232/243/342 8mm Cartridge Tape Unit
• 9348-001 ½-inch Reel Tape Unit–Rack Mount
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