Tape Cartridge Compatibility; Setting The Write-Protect Tab On 4 Mm Tape Cartridges; Environmental Considerations For 4 Mm Data Cartridges - IBM R30 Operator's Manual

Tape Cartridge Compatibility

The 4 mm tape drive is compatible with existing 4 mm tape subsystems that are designed to
operate with Digital Data Storage approved media, which meet the following standards:
For DDS llll
– 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 llll 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 .
Because the drive reconfigures itself automatically depending on the media type installed,
the density setting of the drive cannot be changed.
Media Type
DDS
DDS llll
DDS2
Non-DDS

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.
Write-Protect Tab Not Set
Window
Closed

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 2-42, are
required when operating the cartridge within this range. The risk of possible data loss is
2-36
Operator Guide
Device Configuration
Read-only
Read/write in 2.0GB mode only.
Read in either density; write in 4.0GB mode only.
Not supported. The cartridge ejects.
Write-Protect Tab Set
Window
Opened