Type Native Data Capacity Recording Format
Ultrium 3 400 GB (800 GB at 2:1
compression)
Reads and writes data on 704
tracks, sixteen tracks at a time
Ultrium 2 200 GB (400 GB at 2:1
compression)
Reads and writes data on 512
tracks, eight tracks at a time
Ultrium 1 100 GB (200 GB at 2:1
compression)
Reads and writes data on 384
tracks, eight tracks at a time
The first set of tracks (sixteen for Ultrium 5, 4 and 3; eight for Ultrium 2 and 1) is
written from near the beginning of the tape to near the end of the tape. The head
then repositions to the next set of tracks for the return pass. This process continues
until all tracks are written and the cartridge is full, or until all data is written.
Figure 2-12 shows the IBM TotalStorage
®
LTO Ultrium 800 GB Data Cartridge and
its components. All LTO family data cartridges are similar.
1 Linear Tape-Open
Cartridge Memory
(LTO-CM) chip
4
Write-protect switch
2 Cartridge door 5 Label area
3 Leader pin 6 Insertion guide
All generations of the IBM LTO Ultrium Data Cartridge contain a Linear
Tape-Open Cartridge Memory (LTO-CM) chip in the cartridge (1 in Figure 2-12).
The cartridge memory chip contains information about the cartridge and the tape,
such as the name of the manufacturer that created the tape, and statistical
performance and usage information (such as number of loads/unloads). The CM
reader uses a radio-frequency interface to read this information when the cartridge
is loaded into the drive. The cartridge statistics are updated just before the
cartridge is unloaded.
The cartridge door 2 protects the tape from contamination when the cartridge is
out of the drive. The tape is attached to a leader pin 3, behind the door. When
the cartridge is inserted into the drive, a threading mechanism pulls the pin (and
Figure 2-12. Ultrium Cartridge
Chapter 2. Product Description 2-27
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