Models 0632-CHA and -CHB
5 1/4-Inch Imagestar
1.3 GB Rewritable Half-high
Optical Disk Drive
(with Full CCW WORM)
IBM's half-high 5.25-inch form factor Magneto Optical disk drives provide
1.3 GB per cartridge of optical storage and support rewritable and full
CCW operations, with performance specifications among the highest avail-
able in their class.
Imagestar optical drives serve the demanding requirements of graphic
design, CAD/CAM, multimedia, animation, and digital video applications.
Both drives contain a number of patented features designed to ensure
data integrity and functional flexibility over a range of operating
conditions.
The high-performance characteristics of the 0632 optical drives make them
particularly well-suited as removable storage accessories for data-
intensive workstation and personal computer applications. The drives
spin at 3500 RPM, provide a media transfer rate of up to 2.3 MB/sec and
a seek time of 29 ms. A 1 MB (or optional 4 MB) cache with read-ahead
buffer contributes to the improved data transfer performance.
The Imagestar 0632-CHB has been fortified with a heavy-duty loader mech-
anism for the demanding requirements of jukebox environments. In
addition, this drive has a special interface to permit synchronizing
the jukebox and drive during load/unload operations. With a 500,000
load/unload specification, the reliability of the Imagestar 0632-CHB
makes it ideal for data-intensive mass storage applications.
Both drives contain an autowrite calibration sequence, a feature unique
to IBM optical drives. This feature optimizes the laser power used for
read/write and seek operations and thus provides enhanced reliability
across a range of environments as well as the range of media contained
within the ISO and ECMA standards.
Compatibility with single-density industry standards protect customer
media investments and allow users to take full advantage of newer 2x
capacities. The SCSI-2 interface assures flexibility in computer
attachments. Firmware upgrades can be installed via the SCSI interface,
allowing incremental enhancements to products already in the field. In
addition, these models are resistant to external contamination and
include a thermal sensor to ensure data integrity.
Combining performance with IBM's commitment to quality and industry-
leading reliability, rugged Imagestar drives provide an excellent choice
for integration into optical mass storage systems.
HIGHLIGHTS
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- Half-high form factor
- 3500 RPM
- 29 ms average seek time
- 1 MB or 4 MB (optional) segmented read-ahead cache
- Rewritable and full CCW WORM
- Microcode updatable via SCSI
- Configurable SCSI switch settings
- Downward compatible with 595 MB and 650 MB cartridges
- Industry standard SCSI interface with a 5 MB/sec burst data rate
- 1.3 GB unformatted cartridge capacity using 1024 bytes per sector
Product Description
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5 1/4-Inch 1.3 GB Half-high Rewritable and Full CCW Optical Disk Drives
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General 0632-CHA 0632-CHB
Interface SCSI-2
Formatted Device Capacity 1300 MB (1)
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Performance
Rotational Speed 3500 RPM
Media Transfer Rate (1024 Bytes) 2.3 MB/sec
Interface Transfer Rate
Synchronous 5.0 MB/sec
Asynchronous 2.5 MB/sec
Latency (Average) 8.57 ms
Seek Time (Average)
Random 29 ms
1 Track <1.5 ms
Read/Write Cache 1 MB (2)
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Reliability
MTBF(Projected Power-on hours) 180,000
MLBF(3) (Cycles) 60,000 500,000
Read Error Rate (Corrected) 1E 12 bits per Hard Error
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DC Power Requirements
Nominal Supply 5V/12V
Tolerance (includes ripple) +/-5%
Supply Current
Typical 1.0/1.1 Amps
Maximum 1.2/2.0 Amps
Power Consumption
Typical 18 Watts
Maximum 30 Watts
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Physical Size
Height 41.3 mm
Width 146.0 mm
Depth 205.2 mm
Weight (Maximum) 1.7 kg
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Environmental Characteristics Operating Non-Operating
Temperature 10 to 40 C 1 to 60 C
Shock
Half-sine-wave 4 G/11 ms
Square-pulse - 35 G/15 ms
Vibration (Random RMS) - 0.45 G(5-500Hz)
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Rewritable Optical Disk Cartridges
User Storage Capacity (1024 B/sec) 1300 MB (650 MB/side)
Track Density 18,273 TPI
Recording Density 29,540 BPI
Physical/Logical Tracks 21,600/37,600
Sectors Per Logical Track(1024) 17
Sector Length (Media-dependant) 1024 or 512 bytes
Standard ECMA-184
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(1) 1MB = 1,000,000 Bytes
(2) Optional 4 MB
(3) Mean Loader Cycles Before Failure
Product Description data represents IBM's design objectives and is
provided for comparative purposes; actual results may vary depending on
a variety of factors. This product data does not constitute a warranty.
Questions regarding IBM's warranty terms or methodology used to derive
this data should be referred to your IBM representative.
Data subject to change without notice.
Copyright International Business Machines 1994.