Western Digital WDE2170, Technical Reference Manual

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WD Enterprise WDE2170/WDE4360 Specifications
4079-001045 Rev. B RELEASED 04-08-97
5
2.2. Physical Specifications
Table 2-2. WDE2170/4360 Physical Specifications
Physical Specifications WDE2170 WDE4360
Formatted Capacity
1
2170 MB 4360 MB
Interface(s) Ultra Fast
•
(50-pin)
Ultra Fast Wide
•
(68-pin)
2
•
(80-pin SCA-2)
Ultra Fast
•
(50-pin)
Ultra Fast Wide
•
(68-pin)
2
•
(80-pin SCA-2)
Actuator Type Rotary Voice Coil Rotary Voice Coil
Media Type Thin Film Thin Film
Head Type Thin Film Inductive Thin Film Inductive
Servo Type Embedded Embedded
Number of Disks 2 4
Number of Data Surfaces 4 8
Number of Heads 4 8
Bytes per Sector
3
512 512
Tracks per Inch 6150 6150
Bits per Inch (000) 125 (ID) 125 (ID)
Areal Density 769 Mb/in
2
769 Mb/in
2
Total Cylinders 5956 5956
Zones per Surface 20 20
User Sectors per Drive (512 byte) 225 (OD), 133 (ID) 225 (OD), 133 (ID)
Recording Method 0,4,4 RLL
4
0,4,4 RLL
ECC
5
144-bit Reed Solomon 144-bit Reed Solomon
1
Western Digital defines a megabyte (MB) as 1,000,000 bytes and a gigabyte (GB) as
1,000,000,000 bytes.
2
Differential option available on 68-pin models.
3
The standard is 512 byte sectors. Optionally, we will support 512-528 bytes per sector
in even byte increments. Capacity will change depending on sector size chosen.
4
Run Length Limited
5
ECC has 144-bit span in hardware for correction on-the-fly.