Welcome to FreeBSD Forums. Thanks for the neat formatting!
This can also occur with Apple's operating systems, see for example
G4 Cube won't boot | MacRumors Forums (2021-09-14).
Also with Linux;
Linux on PowerPC FAQ-O-Matic: Default Catch or CLAIM Failed due to extra bootable partition (undated, maybe 2004).
Maybe most relevant: <
https://www.netbsd.org/ports/macppc/faq.html#ofw-claim-failed> – have you tried
reset-all?
Hi Grahamperrin, I read the links you pointed out, although I didn't find a real solution.
On the G5 of the first test (1.8GHz) I couldn't solve the problem, but having another G5 (2.0GHz) I plugged the HD into the latter and tried again.
The CLAIM error didn't appear, but the installar didn't detect the HD.
Reading the data-sheet of the disk (Barracuda 160Gb) I read that the Sata channel to which it is connected does not need jumpers to define master and slave, as it is a point-to-point connection; they are only for diagnostics.
Assuming that the jumper setting enables or disables some functions of the drive's logic board, I tried inserting them in the three available combinations.
This test was successful, the installer found the disk and installed the OS.
But now there is another problem: the disk is not recognised at boot time.
Unfortunately, due to time constraints, I had to abandon the tests.
Next time I'll try removing the jumper from the disk and see if it works again.
