> Error: block.c:275 Volume data error at 0:1000323284! Wanted ID: "BB02", got
> "". Buffer discarded.
>

This is the real error. The volume is corrupt. Bacula can not find the
required header.

> Alert: sh: smartctl: command not found
>

This means you do not have smartmontools installed. So bacula can not
query the health of /dev/sg4 to see if the drive is the cause of the
corruption.


> 3997 Bad alert command: sh -c 'smartctl -H -l error /dev/sg4': ERR=Child
> exited with code 127.
>
>
>
> This only occurs for some of my servers.  Any assistance in resolving these
> error messages would be greatly appreciated.
>

John

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