IBM System/370 Guide

EFFECTIVE CAPACITY OF 2305 FACILITIES
For certain block sizes the effective capacity of a 2305 Model 1
module will be less than that of a 2301 drum. Tables 20.15.1 and
20.15.2 include some of the block sizes for which this is true.
Therefore, blocK size should be chosen carefully~
Table 20.15.1. Effective capacity of the 2305 Model 2, the 2305 Modell,
and the 2301 for various block sizes (DL column) with a
25-byte key
KL = 25
Effective Capacity in Bytes
DL in Bytes
2305
Model 2 2305 Model 1 2301
100
2,688.,000
729,600 1,320,000
200
4,300,800
1,228,800 2,000,000
300
5,529,600
1,728,000 2,400,000
400 6,144,,000
1,996,800 2,640,000
500
6,912,000 2,304,000 2,800,000
600 7,372,,800 2,534,,400
3,000,000
700
7,526,400
2,688,000 3,080,000
800
7,987,200 2,764,800 3,200,,000
900
8,294,400 3,110,400
3,240,000
1000
8,448,000
3,,072,000
3,400,,000
2000 9, 216{, 000
3,840,000 3,600,000
3000
9,216,000 3,456,000 3,600,000
4000
9,216,000 4,.608,000 3,200,000
5000
7,680,000 3,840,000 3,000,000
6000
9,216/,000
4,608,,000
3,600,000
7000
10,752,000
2,688,000 2,800,000
8000
6,144,000
3,072,000
3,,200,000
9000
6,912,000 3,456,000 3,600,000
10,000
7,680,000
3,,840,000
4,000,000
Table 20.15.2. Effective capacity of the 2305 Model 2, the 2305 Model 1,
and the 2301 for various block sizes (DL column) when
records are written without a key
KL = 0
DL in Bytes
46
100
200
300
400
500
600
700
800
900
1000
2000
3000
4000
5000
6000
7000
8000
9000
10,000
Effective
2305
Model 2
3,763,200
5,683,200
6,681,600
7,372,,800
8,064,000
8,294,400
8,601/,600
8,601,600
n ftn~ £n.n
O,':10:J,ovv
9,216,000
9,,216,000
9,216,000
9,216,000
7,680,000
9,216,000
10,752,000
6,144,000
6,912,000
7,680,000
Capacity in Bytes
2305 Model 1
1,036,800
1,766,400
2,188,800
2,611,200
2,880,000
3,225,600
3,225,600
3,379,200
., ,. E;.&:. nnn
.J,"t'.Jv,vvv
3,840,000
3,840,000
4,608,000
4,608,000
3,840,000
4,608,000
2,688,000
3,072,000
3,456,000
3,840,000
2301
1,760,000
2,440,000
2,820,000
3,040,000
3,200,000
3,360,000
3,360,000
3,520,000
3,420,000
3,600,000
3,600,000
3,600,000
3,200,000
4,,000,000
3,600,000
2,800,000
3,200,000
3,600,000
4,000,000
I

IBM System/370 Specifications

General

Brand	IBM
Model	System/370
Category	Server
Language	English