3330-Series Disk Storage Attached To 3830 Storage Control Modell - IBM System/370 145 Manual

Table 20.10.2. 3336 and 2316 Disk Pack characteristics
Characteristic 3336 2316
Number of disks per pack
12 13
Number of recording disks 10 11
Number of recording surfaces 19 20
(recorded tracks per pack)
Disk thickness in inches .015 .050
Disk diameter in inches 14 14
Disk pack weight in pounds 20 15
Disk pack maximum capacity in 100 29.1
millions of bytes
Full track capacity in bytes 13,030 1,294
Cylinders per pack 404 plus 1
200 plus 3
alternates alternates
Tracks per cylinder 19 20
Tracks per pack 1,616 4,000
3830 STORAGE CONTROL
Model
!
The 3830 storage Control Mod~el 1 unit contains the power and the
control functions required to o]perate one 3330-series string consisting
of two, four, six, or eight dri'"es. Only 3330 Disk Storage can be
attached to 3830 Storage Controjl Modell. When multiple. requesting is
used, the 3830 Model 1 can conbrol concurrent operation of eight channel
programs, one on each of drives.. Only olle of the eight drives can be
transferring data at any given1time. Figure 20.10,.1 shows a 3330-series
string attached to Model 1 of 3B30 storage Control.
r-
4
°"i
60
"i
1
Disk Disk Disk Disk
Storage
storage storage storage storage
control
panel panel panel panel
panel
60"
1
G E
C
A
- -
Storage
control
H
F D
B
3330 3330 3330 3330 3830
module module module
module Modell
Figure 20.10.1. 3330-series dis:k storage attached to 3830 Storage
Control Modell.
The 3830 Model 1 control
unit~
is microprogram controlled. Read/write
monolithic storage contained in the control unit is used for
microprogram residence,. The control unit also contains a device that
reads interchangeable disk cartridges (identical to the console file
device). This device is used for microprogram backup storage and for
storage of nonresident diagnostics for the 3330-series string. During a
3830-power-on sequence. the functional microprogram is loaded from the
device into control storage with.in the control unit. Therefore,
A Guide to the IBM System/310 Model 145 91