Xerox 820-II Operation Manual page 11

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2
____________________________________________________ HARDWARE
DISK DRIVE OPTIONS
COMPONENT
DATA STORAGE CAPACITY
5 1 /4" Single Sided Dual Floppy
Single Density Disk holds 40
Disk Drives
pages
Double Density Disk holds 70
, 1\1111\\1\\1\\\\
pages
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I
~
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~[U
\ 1
'
5V4" Double Sided Dual Floppy Single Density Disk holds 80
Disk Drives
pages
\
Double Density Disk holds 140
\ \1\\\\1\1\\\\\\\
pages
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~ ~
U
;~U
\ [
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8" Single Sided Dual Floppy
Disk Drives
8" Double Sided Dual Floppy
Disk Drives
i
f
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1
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I
8" Rigid Disk Drive
Single Density Disk holds 120
pages
Double Density Disk holds 240
pages
Single Density Disk holds 240
pages
Double Density Disk holds 480
pages
The Rigid Disk holds up to
4000 pages of material.
DISK PARAMETERS
SINGLE
DOUBLE
DENSITY
DENSITY
128
256
18
17
40
40
3
3
81K 155K
SINGLE
DOUBLE
DENSITY
DENSITY
128
256
18
17
80
80
3
3
172K 322K
SINGLE
DOUBLE
DENSITY
DENSITY
128
256
26
26
77
77
2
2
241 K 482K
SINGLE
DOUBLE
DENSITY
DENSITY
128
256
26
26
154
154
2
2
490K 980K
Bytes/Sector
SectorslTrack
Tracks/Disk
#Tracks reserved
for system use
Disk capacity
for user
Bytes/Sector
SectorslTrack
Tracks/Disk
#Tracks reserved
for system use
Disk capacity
for user
Bytes/Sector
SectorslTrack
Tracks/Disk
#Tracks reserved
for system use
Disk capacity
for user
Bytes/Sector
SectorslTrack
Tracks/Disk
#Tracks reserved
for system use
Disk capacity
for user
Rigid Disk Parameters
256
Bytes/Sector
32
SectorslTrack
1024
Tracks/Drive
8.19
M-Byte Usable Capacity
f
\-
A Double Sided 8" Floppy Disk
Drive is provided with the 8"
fixed disc drive.
Double Sided 8" Floppy Disk Drive
provided for back-up and transfer
Each K of disk capacity is equal to 1024 characters (bytes).
Each
M-Byte
of disk capacity is equal to 1,024,000 characters.
7

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