IBM R30 Operator's Manual page 43

Retensioning
The tape drive works best when it is operated as a streaming tape. If the tape cartridge has
been operated in the streaming mode, it is not necessary to re-tension the tape. If the tape
is used in a non-streaming mode (many start and stop operations), re-tension the tape after
approximately every 30 minutes.
If the tape drive is on when a tape cartridge is inserted, the drive immediately re-tensions
the tape; this is the default setting. Operating system commands may be used to change
this default setting. Refer to the operating system commands manual for your system for
more information.
Tape Cartridge Compatibility
The 1/4-inch tape drive is a medium-capacity small computer system interface (SCSI) tape
drive. This drive is compatible with existing 1/4-inch streaming tape subsystems, which use
the Quarter-Inch Cartridge Drive Standards, Inc. (QIC) formats.
Refer to Appendix A for the tape cartridge part numbers.
If tape cartridges other than the 1/4-inch tape cartridges listed in Appendix A are used, they
must meet the proposed ANSI X3B5/84-59 "Unrecorded Magnetic Tape Cartridge for
Information Exchange" standard.
Note: Although the preceding ANSI standard allows three different tape lengths––47
meters (155 feet), 189 meters (620 feet), and 311 meters (1020 feet)––the 7207
Tape Drive is designed to be used only with the 189 meters (620 feet) tape length.
The exception is the test tape, and it is supported only for diagnostic use.
Tape Cartridge
Standard
QIC-24
QIC-120
QIC-150
QIC-525
QIC-1000
Notes:
1. Original Equipment Manufacturers (OEM) – QIC compliance.
2. Supports error correction code (ECC) error recovery.
7201–001 or 7201–011
150MB Internal
Tape Drive
Read-Only Read-Only
Read/Write Read/Write
Read/Write Read/Write
Read/Write
7201–012 or OEM
1.2GB Internal
Tape Drive
Read-Only Read/Write
Read/Write Read/Write
Read/Write Read/Write
Read/Write Read/Write
Read/Write Read/Write
Using the CPU-Media Enclosure
Drives
1
2-23