IBM 7013 J Series, Operator'S Manual

Page: 58 / 297

2-26
Operator Guide
Tape Cartridge Compatibility
The 4 mm Tape Drive is compatible with existing 4mm tape subsystems that are designed to
operate with Digital Data Storage approved media, which meet the following standards:
•
For DDS
||||
– American National Standard (ANSI) standard, X3.203-191, Helical-scan Digital
Computer Tape Cartridge, 3.81mm.
– European Computer Manufacturers Association (EMCA) standard, EMCA-150,
3.81mm Wide Magnetic Tape Cartridge and DDS
||||
format.
•
For DDS2
– European Computer Manufacturers Association (EMCA) standard, EMCA/TC17/93/20,
3.81mm Wide Magnetic Tape Cartridge for Information Interchange Helical Scan
Recording, DDS2 format.
You cannot change the density setting of the drive, because the device reconfigures itself
automatically, depending on the media type installed, as follows:
Media Type Device Configuration
DDS Read-only
DDS
||||
Read/write in 2.0GB mode only.
DDS2 Read in either density; write in 4.0GB mode only.
Non-DDS Not supported. The cartridge will eject.
Setting the Write-Protect Tab on 4 mm Tape Cartridges
The window on the tape cartridge controls write-protection. When the write-protect tab of a
tape cartridge is set (window open), information can be read from the tape, but cannot be
written to it. When the write-protect tab of a tape cartridge is not set (window closed),
information can be both written to and read from the tape. Trying to write to a 4 mm data
cartridge with the window open causes an error.
Window
Closed
Window
Opened
Write-Protect Tab Not Set
Write-Protect Tab Set
Note: The write-protect setting for the 4 mm tape is the opposite of the setting for the 8 mm
tape.
Environmental Considerations for 4 mm Data Cartridges
Information in this section describes operating and storage conditions including temperature,
relative humidity, and maximum wet bulb data.
Attention: The manufacturer has specified a set of temperature and humidity ranges in
which the 4 mm data cartridge can operate with ease. Only regular cleaning procedures, as
described in “Cleaning the Tape Path on the 4.0GB 4 mm Tape Drive” on page 2-32, are
required when operating the cartridge within this range. The risk of possible data loss is