Failure to start up from full backup

[equill]

Neither the SD nor the Retrospect backup, respectively on the 30GB and 100GB partitions, booted the source iMac. Attempts to warm boot from both startup volumes ended with the prohibitory sign. Both volumes had been massaged with DiskWarrior and Disk Utility first.

Verbose cold restarts in both cases gave more than a screenful of text, followed quickly by default to the internal HDD of the source Mac for startup. Is there a way to capture that text? Recant. Of course there is. It's in the system.log.

I am impelled at this stage to savour the nasty taste of a faulty 912 bridge board in the d2, although this diagnosis does not account for the ability to copy from internal HDD to either partition. I noticed during the DW Directory repairs that copying by SD produced 31% of disorder, and Retrospect but 23%. I cannot, however, see any diagnostic value in the numbers. The disk space used by the Retrospect copy, at 8.44GB, was very close to that of the SD copy, at 8.49GB.

There is a final test that may resolve the matter: I shall use SD for a full and bootable backup to a known good d2 Extreme, and see whether I can get any sense from that.

de