The Write (6) command is only 6 bytes long and is a legacy from early SCSI days. Its use is restricted to 21-bit LBAs. The CDB structure is:
| bit→ ↓byte |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|
| 0 | Operation code = 0Ah | |||||||
| 1 | Reserved | LBA | ||||||
| 2 | LBA | |||||||
| 3 | LBA | |||||||
| 4 | Transfer length | |||||||
| 5 | Control | |||||||
Read more about this topic: SCSI Write Commands
Famous quotes containing the word write:
“So far as I am individually concerned, & independent of my pocket, it is my earnest desire to write those sort of books which are said to “fail.””
—Herman Melville (1819–1891)