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Finding the target "/dev/sg" device

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General description

This section describes how to find proper "/dev/sg" device for CHARON mapping

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Procedures of finding the target "/dev/sg" device

First method

In xterm console issue:

# cat /proc/scsi/sg/device_hdr; cat /proc/scsi/sg/devices

The output will look something like:

host    chan    id      lun     type    opens   qdepth  bus    online
4       0       0       0       5       1       1       0      1
5       0       0       0       0       1       1       0      1

The fifth field ("type") is the device type.

ValueDevice
0Disk
1Tape
5CD-ROM

The "N" in the "/dev/sgN" is the line number in this table (starting from 0) corresponded to the devices CHARON-AXP will use.

Thus "/dev/sg0" will be CD-ROM mapping in this example.

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Second method

On a freshly booted system please issue the following command:

# dmesg | grep sg

The output will look like that:

[ 1.503622] sr 4:0:0:0: Attached scsi generic sg0 type 5
[ 1.780897] sd 5:0:0:0: Attached scsi generic sg1 type 0

(warning) This table lists all the devices, not only the real SCSI ones (SATA/IDE for example). CHARON supports only real SCSI devices.



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