Attributes for 1200 MB 1/4-inch tape drives (type 1200mb-c)
The following are attributes for 1200 MB 1/4-inch tape drives (type 1200mb-c).
- Block size
- The default block size is 512. The other valid block sizes are 0 for variable length blocks, and 1024.
- Device buffers
- The general information for this attribute applies to this tape drive type.
- Extended file marks
- Writing to a 1/4-inch tape can only occur at the beginning of tape (BOT) or after blank tape is detected. If data exists on the tape, you cannot overwrite the data except at BOT. If you wish to add data to a tape that has been written and then rewound, you must space forward until the next file mark is detected, which causes the system to return an error. Only then can you start writing again.
- Retension
- The general information for this attribute applies to this tape drive type.
- Density setting #1 and density setting #2
- The following settings apply:
* QIC-525 and QIC-1000 are the only modes that support the 1024 block size.
Setting Meaning 21 QIC-1000* 17 QIC-525* 16 QIC-150 15 QIC-120 0 Default (QIC-1000), or whatever was the last density setting by a using system. The default values are 21 for Density Setting #1, and 17 for Density Setting #2.
- Attributes with fixed values
- If a tape drive is configured as a 1200 MB 1/4-inch tape drive, the Extended File Marks, Reserve Support, Variable Length Block Size, and Data Compression attributes have predefined values which cannot be changed.