Dell PowerVault TL4000 Dell Model TL2000/TL4000 Tape Library- User's Guide - Page 32

Speed Matching, Channel Calibration, Power Management, Media - cleaning tape

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Speed Matching To improve system performance, the Ultrium 3, Ultrium 4, and Ultrium 5 Tape Drives use a technique called speed matching to dynamically adjust its native (uncompressed) data rate to the slower data rate of the attached server. Channel Calibration The channel calibration feature of the Ultrium 3, Ultrium 4, and Ultrium 5 Tape Drives customizes each read/write data channel for optimum performance. The customization enables compensation for variations in the recording channel transfer function, media characteristics, and read/write head characteristics. Power Management The Ultrium 3, Ultrium 4, and Ultrium 5 Tape Drive's power management function controls the drive's electronics so that part of the electronics completely turn OFF when circuit functions are not needed for the drive's operation. Media The library uses Ultrium Tape Cartridges that provide up to 1500 GB native capacity (up to 3000 GB with 2:1 hardware data compression) for LTO 5 tape drives, up to 800 GB native capacity (up to 1600 GB with 2:1 hardware data compression) for LTO-4 tape drives, and up to 400 GB native capacity (up to 800 GB with 2:1 hardware data compression) for LTO-3 tape drives. Ultrium 5 tape drives can read and write LTO Ultrium 5 Data Cartridges. Ultrium 5 tape drives can read and write LTO Ultrium 4 Data Cartridges at original Ultrium 4 capacities, and can also read LTO Ultrium 3 Data Cartridges with improved data rates. Ultrium 4 tape drives can read and write LTO Ultrium 4 Data Cartridges. Ultrium 4 tape drives can read and write LTO Ultrium 3 Data Cartridges at original Ultrium 3 capacities, and can also read LTO Ultrium 2 Data Cartridges with improved data rates. Ultrium 3 Tape Drives can read and write LTO Ultrium 3 Data Cartridges. Ultrium 3 Tape Drives can read and write LTO Ultrium 2 Data Cartridges at original Ultrium 2 capacities, and can also read LTO Ultrium 1 Data Cartridges with improved data rates of up to 20 MB/second native data transfer rate (40 MB/second with 2:1 compression). Ultrium 4 tape drives cannot read Ultrium 1 tapes. Ultrium 5 tape drives cannot read Ultrium 1 or Ultrium 2 tapes. Supported cartridges include: v LTO Ultrium 1500 GB Data Cartridge (Ultrium 5) v LTO Ultrium 800 GB Data Cartridge (Ultrium 4) v LTO Ultrium 400 GB Data Cartridge (Ultrium 3) v Write-Once-Read-Many WORM Data Cartridge (Ultrium 3, Ultrium 4, Ultrium 5) v LTO Ultrium 200 GB Data Cartridge (Ultrium 2) v 100 GB Data Cartridge (Ultrium 1; read only) v LTO Ultrium Cleaning Cartridge Important: Cartridges placed in the library must be labeled with the correct bar code labels. For additional information, see Chapter 6, "Using Ultrium Media," on page 6-1. 1-10 Dell PowerVault TL2000 Tape Library and TL4000 Tape Library User's Guide

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Speed Matching
To improve system performance, the Ultrium 3, Ultrium 4, and Ultrium 5 Tape
Drives use a technique called
speed matching
to dynamically adjust its native
(uncompressed) data rate to the slower data rate of the attached server.
Channel Calibration
The channel calibration feature of the Ultrium 3, Ultrium 4, and Ultrium 5 Tape
Drives customizes each read/write data channel for optimum performance. The
customization enables compensation for variations in the recording channel
transfer function, media characteristics, and read/write head characteristics.
Power Management
The Ultrium 3, Ultrium 4, and Ultrium 5 Tape Drive's power management function
controls the drive's electronics so that part of the electronics completely turn OFF
when circuit functions are not needed for the drive's operation.
Media
The library uses Ultrium Tape Cartridges that provide up to 1500 GB native
capacity (up to 3000 GB with 2:1 hardware data compression) for LTO 5 tape
drives, up to 800 GB native capacity (up to 1600 GB with 2:1 hardware data
compression) for LTO-4 tape drives, and up to 400 GB native capacity (up to 800
GB with 2:1 hardware data compression) for LTO-3 tape drives.
Ultrium 5 tape drives can read and write LTO Ultrium 5 Data Cartridges. Ultrium
5 tape drives can read and write LTO Ultrium 4 Data Cartridges at original
Ultrium 4 capacities, and can also read LTO Ultrium 3 Data Cartridges with
improved data rates. Ultrium 4 tape drives can read and write LTO Ultrium 4 Data
Cartridges. Ultrium 4 tape drives can read and write LTO Ultrium 3 Data
Cartridges at original Ultrium 3 capacities, and can also read LTO Ultrium 2 Data
Cartridges with improved data rates. Ultrium 3 Tape Drives can read and write
LTO Ultrium 3 Data Cartridges. Ultrium 3 Tape Drives can read and write LTO
Ultrium 2 Data Cartridges at original Ultrium 2 capacities, and can also read LTO
Ultrium 1 Data Cartridges with improved data rates of up to 20 MB/second native
data transfer rate (40 MB/second with 2:1 compression). Ultrium 4 tape drives
cannot read Ultrium 1 tapes. Ultrium 5 tape drives cannot read Ultrium 1 or
Ultrium 2 tapes.
Supported cartridges include:
v
LTO Ultrium 1500 GB Data Cartridge (Ultrium 5)
v
LTO Ultrium 800 GB Data Cartridge (Ultrium 4)
v
LTO Ultrium 400 GB Data Cartridge (Ultrium 3)
v
Write-Once-Read-Many WORM Data Cartridge (Ultrium 3, Ultrium 4, Ultrium
5)
v
LTO Ultrium 200 GB Data Cartridge (Ultrium 2)
v
100 GB Data Cartridge (Ultrium 1; read only)
v
LTO Ultrium Cleaning Cartridge
Important:
Cartridges placed in the library must be labeled with the correct bar
code labels. For additional information, see Chapter 6, “Using Ultrium
Media,” on page 6-1.
1-10
Dell PowerVault TL2000 Tape Library and TL4000 Tape Library User's Guide