Two things that Arkeia doesn't do by default: Have a facility to 'write over whatever tape is in the drive', and eject the tape when it's finished.

So, in the Advanced Options of your Periodic Backup, set the pre-backup command to

arkc -tape -recycle -D name=[unrenderable node]

Substitue '__drivename' for the name of the drive that you configured in Arkeia.

And in the post-backup command

mt -f /dev/st0 eject

If you don't specifity -f /dev/st0, mt(1) will use /dev/tape, so you could just

ln -s /dev/st0 /dev/tape

Help! I get W00800015 "server is a type 1 machine" / '1'! You are limited to '0' standard machine(s)

You get emailled/see backup logs like this

I00800060 Start of total backup: Savepack "Daily Backup", Drivepack "DAT", Pool "Tapes" I00800080 Owner is "root" I00800020 Adding savepack "Daily Backup" W00800015 server is a type 1 machine E00800017 '1'! You are limited to '0' standard machine(s) E00800090 Cannot start backup I00800024 "0" files, "1" MB, compressed at "1.0", "1" seconds, "60" MB/mn I00800025 End of backup

Your machine still is a type 2 ("cheap" machine, see here) but the hostname has changed.

What this probably means instead of hostname returning your short name, it now returns your FQDN.

This is often caused by changing the order of your line in /etc/hosts

10.1.2.3 server.local.domain server

If you get these errors, change the order of the entries in that line

10.1.2.3 server server.local.domain

And all should come right. Figured out with help from here and here.

As a sidenote on the above suggestion: I have had some success altering the way arkeia aliases each machine without modifying the host file. Our host files is set with FQDN first followed by alias/shortnames. Just executing

root# ./arkmvhost --host fqdn.company.com --newhost shortname

and then

root# ./arkboot -start

to restart arkeia has cleared up most issues. With the exception of those where we have found errors in the host file itself.
—JacobMajors

/opt/arkeia/bin/arkchklic -h

arkchklic is helpful when trying to diagnose license issues