Wang 2200 - Page 26

APPENDIX
A
MODEL
2280/2280N
SPECIFICATIONS
USER
STORAGE
CAPACITY
DISK
HODEL
SECTORS
SURFACE
PER
TOTAL
SEd-ORS
BYTES
PER
SURFACE
TOTAL
BYTES
2280-1/2280N-1
52,608
105,216
13,467,648
26,935,296
2280-2/2280N-2
52,608
210,432
13,467,648
53,870,592
2280-3/2280N-3
52,608
LEGAL
315,648
SECTOR
ADDRESSES
13,467,648
80,805,888
DISK
MODEL
All
configurations
SECTORS
PER
SURFACE
52,608
LOWEST
LEGAL
ADDRESS
000
HIGHEST
LEGAL
ADDRESS
52
,
607
PERFORMANCE
Rotation Speed
All
configurations
3600
rpm
Seek
Time
(position
head to
track)
Track to
Track
6.00
ms
Average
30.00
ms
Maximum
55.00
ms
Latency
Time
(platter
rotation to
sector
on
track)
Average
(one-half
revolution
@ 3600
rpm)
8.33
ms
Average
Sequential
Read
Time (per
sector)
4.6 ms
Average
Sequential
Write Time
(per
sector)
3.6 ms
Average
Random
Read/Write
Time
(per sector)
42.0
ms
Move/Copy
Time
(entire
disk
platter)
Approximately
2
minutes
per
logical
platter (13.4
megabytes)
19