For older versions of BackupEDGE (01.01.0x and earlier), use edge.cronset to check
your settings for edge.config for root & cron, or check
your script, depending on how you are using BackupEDGE. Determine
the device name that you are writing to.
For newer versions of BackupEDGE (01.02.00 and later), check Edgemenu:Admin:Define Resources,
and be sure that the device node (DNode) actually exists and is a block or character device.
Do a file command on the device in question. The file type
should be 'character special'. If the file type is not 'character
special', then the device is not a valid character device.
Make sure the tape drive has been configured properly and is known
to the kernel. Perhaps you are simply using the wrong device and
need to specify a different device. If the tape drive is not
configured properly, you will need to configure the tape drive. You
may also have to recreate the device node for the tape drive if it
is missing. Then make sure that you use the proper device for
future backups.
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