IBM TS4500, Введение и руководство по планированию

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Table 25. Rewind times for the 3592 tape drive (continued)
Cartridge type Rewind time Capacity setting
TS1155 tape
drive
TS1150 tape
drive
TS1140 tape
drive
JL
Maximum
Advanced Type D economy -
short length
18 seconds 18 seconds N/A
Average
Advanced Type D economy -
short length
11 seconds 11 seconds N/A
JZ
Maximum
Full, unscaled capacity (100%) 94 seconds 94 seconds N/A
Scaled capacity with 0x35
setting (20%)
34 seconds 34 seconds
N/A
Average Full, unscaled capacity (100%) 50 seconds 50 seconds N/A
Table 26. Average block locate time from load point for 3592 tape cartridge in 3592 tape drive
Cartridge Setting
Average Block Locate Time from Load Point 3
TS1155 tape drive TS1150 tape drive TS1140 tape drive
JB
Full, unscaled capacity (100%) N/A N/A 37 seconds
Scaled capacity with 0x35
setting (20%)
N/A N/A 15 seconds
JC
Full, unscaled capacity (100%) 40 seconds 40 seconds 40 seconds
Scaled capacity with 0x35
setting (20%)
12 seconds 12 seconds 12 seconds
JD
Full, unscaled capacity (100%) 44 seconds 44 seconds N/A
Scaled capacity with 0x35
setting (20%)
14 seconds 14 seconds N/A
JK Advanced Type C economy 11 seconds 11 seconds 11 seconds
JL Advanced Type D economy 11 seconds 11 seconds N/A
JX Full, unscaled capacity (100%) N/A N/A 37 seconds
JZ Full, unscaled capacity (100%) 44 seconds 44 seconds N/A
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.
Chapter 1. Overview
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