Western Digital WDE2170 - Manual (Page 13)

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.