SECTION 1
GENERAL DESCRIPTION AND .SPECIFICATIONS
1.1
GENERAL DESCRIPTION
The Quantum ProDrive
Series™
is a family
of
ten hard disk drives using non-removable 3 1/2-inch rigid
disk platters as storage media. These drives feature formatted capacities ranging from 42 to 168 megabytes
and a variety
of
interfaces. This manual covers the
ProDrive™40S
and ProDrive 80S, which feature the
industry-standard
Small Computer System Interface (SCSI) host interface. The ProDrive 40S has 42
megabytes
of
formatted capacity on two disks with three movable heads; the ProDrive 80S has 84
megabytes
of
formatted capacity on three disks with six movable heads. These drives make optimum use
of
powerful SCSI commands
to
provide maximum system performance. Media defects and error recovery are
efficiently managed within these products and can
be
fully transparent to the user. The
ProDri:ve
Series
drives feature an innovative design using an integrated controller, minimum number
of
parts, and close
control
of
product quality during manufacture. The result is low cost, high reliability products.
NOTE:
Throughout this manual, ProDrive 40S/80S
or
ProDrive will refer to either the ProD rive
40S
or
the ProDrive 80S. ProDrive 40S and ProD rive 80S will be used to refer specifically
to the
42
and 84 megabyte versions, respectively.
1.1.1
APPLICABLE DOCUMENTS
This document provides a general description
of
the
ProDrive
40S/80S, including installation, principles
of
operation, interface command implementation, and maintenance. Additional infonnation pertaining to
the
SCSI interface may be found in the ANSI X3.I31-1986, Small Computer System Interface
Specification Common Command
Set, Rev 4B, (by an ANSC X3T9.2 working group).
1.2
SPECIFICATIONS
Key features
of
the ProDrive 4OS/80S include:
• Formatted storage capacity
of
42
or
84 megabytes
• Industry-standard (ANSI) SCSI host interface, CCS, Rev 4B
• Fully integrated SCSI controller
• Industry standard 3 1/2-inch form factor
• Data transfer rate
of
up to 2.0 megabytes/second asychronous, 4.0 megabytes/second
synchronous
• Full disconnect/arbitrate/reconnect capability
• 64 KB look-ahead, programmable DisCache®
•
19
msec average access time
• 48 bit computer generated cyclic ECC (Error Correcting Code) with
II-bit
burst correction
. capability
• Automatic retry for read disk errors
• Transparent defect mapping
• High-performance in-line defective sector skipping and reassignment
of
new defective
sectors without need to reformat
• Buffer memory parity and SCSI bus parity
•
Patented
AIRLOCK® automatic shipping lock and dedicated landing zone
• Read/Write with
1:
I interleave operation .
• Support for 512, 1024, and 2048 byte logical block sizes
• Multiple block data transfer up to 64K blocks
General Description and Specifications 1-1
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