The Read Long command is used for Error Correcting Code (ECC) compliant data previously written by a Write Long command. The CORRCT bit defines whether or not the target is allowed to correct any errors found before returning the data to the target. The LBA field is 32 bits in length and the Transfer Length field is 16 bits. The CDB structure is:
| bit→ ↓byte |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|
| 0 | Operation code = 3Eh | |||||||
| 1 | Reserved | CORRCT | RelAdr | |||||
| 2–5 | LBA | |||||||
| 6 | Reserved | |||||||
| 7-8 | Byte transfer length | |||||||
| 9 | Control | |||||||
Read more about this topic: SCSI Read Commands
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