Chapter 5: Media
Data Cartridge
70 QuantumLTO-8 HH SAS User’s Guide
The first set of tracks 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.
The cartridge door (2 in Fi
gure 8 on page 68) protects the tape from
contamination when the cartridge is out of the drive. The tape is
attached to a leader pin (3 in
Figure
8 on page 68) behind the door.
When the cartridge is inserted into the drive, a threading mechanism
pulls the
pin (and tape) out of the cartridge, across the drive head, and
onto a non-removable take-up reel. The head can then read or write
data from or to the tape.
The write-protect switch (4 in
Figure 8 on page 68) prevents data from
being written to the tape cartridg
e. For more information, see Write-
Protect Switch on page 77.
Data
Cartridge
Native Data
Capacity Recording Format
Ultrium 8 12000 GB (30000 GB
at 2.5:1 compression)
Reads and writes data on 6656
tracks, 32 tracks at a time
Ul
trium 7
M8 format
90
00 GB (22500 GB
at 2.5:1 compression)
Reads and writes data on 5376
tracks, 32 tracks at a time
Ultrium 7 6000 GB (15000 GB
at 2.5:1 compression
Reads and writes data on 3584
tracks, 32 tracks at a time
Ul
trium 6 2500 GB (6250 GB at
2.5:1
compression)
Reads and writes data on 2176
tracks, sixteen tracks at a time
Ultrium 5 1500 GB (300 GB at
2:1 compression)
Reads and writes data on 1280
tracks, sixteen tracks at a t
ime
Ultrium 4 800 GB (1600 GB at
2:1 compression)
Reads and wri
tes data on 896
tracks, sixteen tracks at a time
Ultrium 3 400 GB (800 GB at
2:1 compression)
Reads and wri
tes data on 704
tracks, sixteen tracks at a time
Ultrium 2 200 GB (400 GB at
2:1 compression)
Reads and wri
tes data on 512
tracks, eight tracks at a time
Ultrium 1 100 GB (200 GB at
2:1 compression)
Reads and wri
tes data on 384
tracks, eight tracks at a time
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