Pete Thanks. I d/l DFSee, deleted the Linux partitions and created a JFS partition.
Rebooted the ArcaOS installer and got to the Check Disk section which stated that some or all partitions are lacking LVM info - which is 'normal if the disk has not been reviously used with OS/2', so let the installer write the LVM info and rebooted. Got exactly the same thing - did this twice .
At Personalities, chose Single volume with default options, Simple Installation, no Target Volume shown so Disk Check again with same result.
I have used System Management and confirmed that the partition created was Primary, Startable and Unformatted.
So I'm stuck again.
Paul