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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:
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:
[0:0:0:0] disk VMware Virtual disk 1.0 /dev/sda /dev/sg0
[0:0:10:0] tape COMPAQ SDLT320 5F5F /dev/st0 /dev/sg9
[0:0:11:0] tape COMPAQ SDLT320 5F5F /dev/st1 /dev/sg10
[0:0:12:0] mediumx COMPAQ MSL5000 Series 0520 /dev/sch0 /dev/sg11
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Output example2:
[0:0:0:0] disk VMware, VMware Virtual S 1.0 /dev/sda /dev/sg0
[4:0:0:0] cd/dvd NECVMWar VMware SATA CD01 1.00 /dev/sr0 /dev/sg1
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Procedures of finding the target "/dev/sg" device
First method
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Method 2
Open a terminal console and issue:
# cat /proc/scsi/sg/device_hdr; cat /proc/scsi/sg/devices |
The output will look something likeOutput example:
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
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The fifth field column ("type") is the device type.value has the following correspondence:
| Value | Device |
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| 0 | Disk |
| 1 | Tape |
| 5 | CD-ROM |
| 8 | Tape changer |
The "N" in the "/dev/sgN" device is the line number in this table (starting from 0) corresponded to the devices CHARON will use.Thus corresponding to the output provided by the commands above without taking the header into account so here "/dev/sg0" will be corresponds to the the CD-ROM mapping in this example.
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Second method
Method 3
On a freshly booted system please , issue the following command:
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
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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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