Technical Reference Manual
Page 1
Overview of the Drives
1
What are the Drives?
The CFP2107 series is a family of high performance 3.5-inch low-profile (1.0 inch
high) 2.1GB (formatted) disk drives. They all offer 8.5 millisecond average seek
time for Reading, 9.0 millisecond seek time for Writing, with an average latency
of only 4.17 ms. High capacity is achieved by utilizing a zone density recording
technique using 15 recording zones at an areal density of 317 Mbits per square
inch. These drives feature high performance while maintaining low power
consumption to reduce power supply current and system cooling requirements in
disk arrays.
They are designed to operate on the Small Computer System Interface (SCSI)
and are SCSI-2/3 command compatible. The mechanical and major electronic
components are identical between the models and differ only in the host
interface implementation:
Drive Model
Form Factor
Interface
Capacity
CFP2107E
1 inch high, 3.5 inch
80-pin Single Connector
FAST WIDE
2147 MB
CFP2107S
1 inch high, 3.5 inch
50-pin FAST
2147 MB
CFP2107W
1 inch high, 3.5 inch
68-pin FAST WIDE
2147 MB
CFP2107WD
1 inch high, 3.5 inch
68-pin FAST WIDE
Differential
2147 MB
The CFP2107WD drive is documented separately in the CFP2107WD SCSI Wide
Differential Intelligent Disk Drive Product Manual. The remainder of the
drives, which are documented in this manual, are referred to collectively in this
manual as “the drive” for simplicity.
Differences Between the Models
The three drive models differ only on the host interface implementation:
CFP2107E:
SCSI 80-pin Wide Single Connector Attachment (SCA) interface
designed for applications such as Redundant Arrays in which the drives are
plugged directly into a backplane. The drive also implements a Wide SCSI
interface for high interface bandwidth.
CFP2107S:
SCSI 50-pin standard interface designed for applications which
implement the standard SCSI-2 architecture.
CFP2107W:
SCSI 68-pin Wide interface designed for applications which
require high interface bandwidth and the option of cabled interconnect. The
drive utilizes the Unitized Connector defined by the Small Form Factor
Committee (refer to SFF-8009). The Unitized Connector combines the SCSI-3 P-
