Library Performance; Average Block Locate Time From Load Point For 3592 Tape Cartridge In 3592 Tape Drive - IBM TS4500 Introduction And Planning Manual

Table 25. Rewind times for the 3592 tape drive (continued)
Cartridge type Rewind time
Maximum
JL
Average
Maximum
JZ
Average
Table 26. Average block locate time from load point for 3592 tape cartridge in 3592 tape drive
Cartridge
Full, unscaled capacity (100%)
JB
Scaled capacity with 0x35
Full, unscaled capacity (100%)
JC
Scaled capacity with 0x35
Full, unscaled capacity (100%)
JD
Scaled capacity with 0x35
JK Advanced Type C economy
JL Advanced Type D economy
JX Full, unscaled capacity (100%)
JZ Full, unscaled capacity (100%)
Notes:
1. For an encrypted format, an additional 5 seconds might be required to obtain a encryption key to read the first
block accessed on the cartridge.
2. For further information about the capacity of each type of 3592 tape cartridge, see Table 11 on page 27. For
further information about data types supported by the TS1140, TS1150, and TS1155 tape drives, see Table 9 on
page 21.

Library performance

The library performance values show the relative performance of the systems and
are not meant to be absolute indicators of performance in your specific
environment. Performance values, such as cartridge inventory times, mount
performance, and cartridge move time, are obtained for the TS4500 tape library
using specific measurements.
Performance values for the TS4500 tape library, whether measured on test systems
or modeled through simulations, are based on a fixed set of workload assumptions
to ensure accurate comparisons; however, the results are not evaluated in all
production environments.
Capacity setting
Advanced Type D economy -
short length
Advanced Type D economy -
short length
Full, unscaled capacity (100%)
Scaled capacity with 0x35
setting (20%)
Full, unscaled capacity (100%)
Setting TS1155 tape drive
setting (20%)
setting (20%)
setting (20%)
TS1155 tape
drive
18 seconds
11 seconds
94 seconds
34 seconds
50 seconds
Average Block Locate Time from Load Point
TS1150 tape drive
N/A N/A
N/A N/A
40 seconds 40 seconds
12 seconds 12 seconds
44 seconds 44 seconds
14 seconds 14 seconds
11 seconds 11 seconds
11 seconds 11 seconds
N/A N/A
44 seconds 44 seconds
TS1150 tape TS1140 tape
drive drive
18 seconds N/A
11 seconds N/A
94 seconds N/A
34 seconds
N/A
50 seconds N/A
3
TS1140 tape drive
37 seconds
15 seconds
40 seconds
12 seconds
N/A
N/A
11 seconds
N/A
37 seconds
N/A
Chapter 1. Overview
67