ECMA | European Computer Manufacturers Association. The European equivalent of |
| ANSI. |
enhanced commands SCSI commands that are
EOD | End Of Data. An area that signifies the end of the valid data. If new data is |
| written over a larger quantity of old data, it is possible for data to exist after EOD, |
| but because it is after EOD, this old data is no longer valid. |
EOM | End Of Media format. The last usable point on the tape. |
Early Warning End Of Media. A physical mark or a | |
| the tape that tells the drive that it is approaching EOM. |
filemark | A mark written by the host. It does not necessarily separate files; it is up to the host |
| to assign a meaning to the mark. |
filemark count | The number of filemarks written since the beginning of the current tape up to and |
| including the current group. |
FRU | Field Replaceable Unit, an assembly or group of components that is replaced in its |
| entirety by Service Engineers when it contains a fault. |
host | The host computer system acting as controller for the drive. |
immediate mode | A mode of responding to SCSI commands where the drive or other peripheral |
| does not wait until the command has finished before returning status information |
| back to the host. For writing filemarks, Immediate mode can significantly improve |
| the performance of systems that do not set the Immediate bit when sending a SCSI |
| Write Filemarks command. On the other hand, data is not flushed to tape in |
| response to a filemark command. |
load | The process in which the drive takes in an inserted cartridge and goes online. |
LUN | Logical Unit Number, by which different devices at a particular SCSI ID can be |
| addressed individually. The drive has a fixed LUN of 0. |
LVD | |
RAW | see |
RAW improves data integrity by reading data immediately after it is written and | |
| writing the data again if an error is found. |
reserved | Not generally available for use with the drive. A reserved field should contain all |
| zero bits. |
188 Glossary