Intermixing - Honeywell MSU0402 Manual

Table 1-1. Mass Storage U nit Characteristics
Characteristics
Data capacity. Formatted (millions 6-bit characters!
millions 9-bit bytes)
Transfer rate (thousands 6-bit characters per
sf
thousands 9-bit bytes per s)
Bit density (bpi)
Track density (tpi)
A verage access time (ms)
Minimum seek time (ms)
A verage seek time (ms)
Maximum seek time (ms)
A verage latency (ms)
Simultaneity
Disks per pack
Recording surfaces per pack
Tracks per recording surface
(spares included)
Spindle speed (rpm)
Disk pack used (or equivalent)
Intermixing
MSU0402 MSU0451
117178 235/156
1074/716
10741716
4040
4040
384 384
33.3
38.3
8.0 8.0
25.0 30.0
45.0 55.0
8.3 8.3
During data transfer on one unit, a simul-
taneous seek operation can be performed
on all other units on the same mass
storage processor.
12 12
19 19
411 815
7 7
3600 3600
M4451 M4451
Mass storage processors for all Large Systems (Table A-I) have been designed to
allow MSU0400 and MSU0451 units or MSU0402 and MSU0451 units to be inter-
rnixed on the mass storage processors. (See Tables
A-3
through
A-B.)
MSU0400
and MSU0402 units cannot be intermixed.
Introduction
The advantages of this capability are as follows:
• Eases conversion to MSU0451. Installation ofMSU0451s can be staggered, one
or two at a time, minimizing system disruption.
1-3
AT71-03