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BackupEDGE finds my backup device but not the autochanger
Linux Redhat tape changer scsi LUN scanning BackupEDGE edge auto
Product Release(s)
1.02.0x 02.00.0x 02.01.0x 02.02.0x
Operating System(s)
Linux (glibc)
Linux (libc)
Problem Description
The backup device is a autochanger. The autochanger is on LUN 1 with the same SCSI ID as the tape drive. My SCSI card sees both devices, but BackupEDGE does not detect the autochanger.

LUN Scanning is not enabled. To verify this, run the command
cat /proc/scsi/scsi
while logged in as root. The tape drive, but not the autochanger, should be listed along with any other SCSI devices you may have.
What you will need to do is enable LUN scanning within the kernel. You can get it to work temporarily by typing the command echo scsi add-single-device 0 0 {scsi id} 1 > /proc/scsi/scsi .

For example, if your autochanger and tape drive were on SCSI ID 2, you would type:

echo scsi add-single-device 0 0 2 1 > /proc/scsi/scsi

If this works, the command

cat /proc/scsi/scsi
should now show the autochanger device separately.

Then run auto detect (/usr/lib/edge/bin/edge.autodetect)to get new devices from edgemenu. But the correct option will be to enable LUN Scanning to get the changer to be recognized permanently. This is done by running the utility make menuconfig to enable LUN scanning. You must then rebuild and install the kernel.

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Last Updated - 2018/05/16