| The IBM 3570 Model B11 is a library subsystem with 1 tape drive, 20
cartridges, a tape drive data rate of 2.2 MB/sec, and is a rack-mount
unit.
The IBM Magstar MP Tape Subsystem is a revolutionary new multipurpose
(MP) tape subsystem designed for automation to attach to AS/400, and RS/6000
systems. It is based on the same reliable Magstar technology as the IBM
3590 High Performance Tape Subsystem. It is designed to provide midrange
systems a tape subsystem that has high levels of reliability, with lower
price, capacity and performance than the 3590. It also provides a faster
data access than other tape technologies with a drive time to read/write
data of 8 seconds from cartridge insertion.
The Magstar MP is a compact, integrated storage subsystem that functionally
expands the capability of tape to perform both write and read intensive
operations. The Magstar MP utilizes a unique new robust heavy usage Fast
Access Linear Tape cartridge that is approximately half the size of IBM
3480/3490/3590 cartridge tapes and is designed for high reliability. The
tape drive reads and writes data in a 128-track format, reading and writing
four tracks at a time. Data is written using an interleaved serpentine
longitudinal recording format starting at the center of the tape (mid-tape
load point) and continuing to near the end of the tape. The head is indexed
to the next set of four tracks and data is written back to the mid-tape
load point. This process is continued in the other direction until the
tape is full. The capacity is 5GB per cartridge (15GB with 3:1 Lempel-Ziv
compression). The drive data transfer rate is 2.2 MB/sec (uncompacted)
with a 20 MB/sec burst data rate. The sustained data rate with maximum
compression is 14 MB/sec. The IBM Magstar MP brings a new dimension of
functionality to tape storage because of its revolutionary data recall
performance allowing new applications to be enabled in addition to traditional
tape applications.
The Magstar MP Model B11 is a rack-mountable automated library model
supporting automatic (sequential) and random access to 20 cartridges from
two removable 10-cartridge magazines. It contains a single tape drive
with an integrated microprocessor control unit and all necessary power
and cooling components. It attaches to a host system through a SCSI-2
adapter. The integrated control unit contains the electronics and logic
for reading and writing data, controlling the library picker, and managing
the operator display panel. The control unit functions include management
of the data buffer, error recovery procedures, and the control of all
tape drive operations and some channel operations. The library model uses
a cartridge loading and transport mechanism to automatically transport
tape cartridges to and from the storage magazines and the tape drive.
It has a Liquid Crystal Display (LCD) Operator Panel that is used as the
primary method of displaying information for the operator. Control buttons
on the Operator Panel allow selection of various menu options and information.
The library unit can operate in random access, automatic access, or manual
access modes. With two magazines of cartridges, the Magstar MP can provide
up to 300GB of on-line data with a data rate of up to 20GB/hr. Rack mounting
hardware and a power cord to attach to a rack power supply is included
with this model.
Supplies:
The Magstar MP Fast Access Cartridge data tapes (P/N 05H2462)
Cleaner cartridges (P/N 05H2463), and magazines (P/N 49G6598)
Physical Specifications
Models B11 or B12 (rack-mountable library) without specify feature 9221:
• EIA Units: 5 EIA Units
• Width: 444 mm (17.5 inches)
• Depth: 714 mm (28.1 inches)
• Height: 217 mm ( 8.5 inches)
• Weight Model B11: 24 Kg (53 lb.)
• Weight Model B12: 29 Kg (64 lb.)
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