Off-topic from installation
I can't find a record locally, but "Unable to write to the last block" is familiar.
Whilst topics such as
"Unable to write to the last block of the device" in Apple Support Communities have workarounds for the symptom, I'd suspect a hardware issue.
In Super User,
Fix bad blocks on Mac hard disk –
an answer there suggests:
- boot from an Ubuntu Live CD, run badblocks
Postscriptmjt5282 wrote:… 2 of the discs and they fail at …
If failure (or future failure) of
two is a possibility: you might be wary of using them in RAID-Z – even after running badblocks (or whatever you choose to verify integrity of the media). Proceed with caution … the usual … have backups, etc..