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Major and Minor Device Numbers in /dev/scsi
Device special files in /dev/scsi have one of the following major device numbers:
- 195 for devices on a SCSI bus (files /dev/scsi/sc*).
- 196 for devices on a jag (VME) SCSI bridge (files /dev/scsi/jag*).
The minor number of these files encodes the adapter number, the SCSI ID, and the LUN, using the bit assignments shown in Figure 5-1.
Figure 5-1 : Bit Assignments in SCSI Device Minor Numbers
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