Finding the target "/dev/sg" device
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- Bruno Miretti (Deactivated)
- Kirill Nikolaev (Unlicensed)
Table of Contents
General description
This section describes how to find proper "/dev/sg" device for CHARON mapping
Procedures of finding the target "/dev/sg" device
Method 1
Open a terminal console and issue:
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If the "lsscsi" command is not installed on your system, use "yum install lsscsi" to make it available. If you cannot install "lsscsi", use method 2 or method 3 described below.
Output example1:
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Output example2:
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Method 2
Open a terminal console and issue:
# cat /proc/scsi/sg/device_hdr; cat /proc/scsi/sg/devices |
Output example:
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The fifth column ("type") value has the following correspondence:
| Value | Device |
|---|---|
| 0 | Disk |
| 1 | Tape |
| 5 | CD-ROM |
| 8 | Tape changer |
The "N" in the "/dev/sgN" device is the line number (starting from 0) corresponding to the output provided by the commands above without taking the header into account so here "/dev/sg0" corresponds to the the CD-ROM.
Method 3
On a freshly booted system, issue the following command:
# dmesg | grep sg |
The output will look like that:
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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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