Removable Storage Media Devices
354 iSeries Handbook
IBM 7207 Model 122 4 GB External QIC Tape Drive
The 7207 Model 122 is a stand-alone QIC ¼-inch streaming linear tape drive
with the capacity of 4 GB per cartridge that incorporates Single Channel
Linear Recording (SLR5) QIC technology. The 7207 Model 122 uses the
QIC-4DC format.
Positioning
Some features of the low cost single tape cartridge solution for removable media are:
• Backward compatibility with previous QIC tape formats. Ideal for data interchange.
• Tape can be used as IPL source for LPAR partitioning configurations.
The Model 122 provides media capacity up to 4 GB (8 GB with a 2:1 compression ratio) data
storage per cartridge. It has a sustained data transfer rate of 380 KB per second (760 KB per
second with a 2:1 compression ratio). It is read and write backward compatible with QIC-120,
QIC-525, QIC-1000 and QIC-2GB, QIC-2DC and QIC-4GB tape data formats. It is fully
compatible with cartridges used by the iSeries 4 GB Internal Tape Unit. See “4 GB ¼-Inch
Internal Cartridge Tape Unit Technology” on page 342 for more information.
It attaches to the iSeries using:
• #2768 PCI Magnetic Media Controller
• #2718 PCI Magnetic Media Controller
For a description of the #2768 and #2718, see “I/O Adapters and Controllers” on page 291.
There is also a tape Auto Loader Library that supports QIC media. See “IBM 7329 Model 308
SLR100 Tape Autoloader” on page 363 for more information.
1. The degree of compression that is achieved is highly sensitive to the characteristics of the data being
compressed.
2. The actual throughput that is achieved is a function of many components, such as system processor, disk
data rate, data block size, data compressibility, I/O attachments, and the system or application software used.
3. Write rate of DVD.
4. Read rate of DVD.
5. V4R5 or later is required to support the #2749.
6. Indicates whether the tape subsystem supports a compaction algorithm. The algorithms are Improved Data
Recording Capability (IDRC), Lempel Ziv 1 (LZ1), or Adaptive Lossless Data Compression (ALDC). These
algorithms enable more data to be written to tape up to the maximum shown.
Machine
Model
7207-122 7208-342 7208-345 3570-C00 3580-H11 7210-025
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