But I couldn't be that unlucky with SATA cables, could I?
Possibly. But there could also be an electrical issue with the SATA socket on either the drive or the motherboard. Sometimes when you remove or reinsert a cable something can get minor damage which often won't manifest until the system and the drive fully heat up.
If you get the same error again try: (1) switching the cable with a known good one (2) plugging the drive into a different SATA port on the mobo. (You may need to tell your CMOS setup which port to boot off if you do. Not all mobos can autodetect the port your bootable drive is on.)
If you're still seeing errors after that, replace the drive because you've eliminated the cable and the mobo as possibles, and all that's left is the drive itself.
Don't take chances with HDs. I get more than one repeating drive error, or a non-trivial SMART alert, I'll yank them. Especially since by the time SMART detects something you're already well into the danger zone. I've had SATAs catastrophically fail with *no* SMART warnings at all.
Luck.






and I'm always left thinking "Why does this make you angry??"






)
. You've learned (or reasoned), as I have, that backups themselves need backups, lol. The one other thing I'd like to caution people about is making sure your backups are secure, but not so secure that you can't unlock them. In other words, use a password, encrypt, but don't lose your password (or key)! It must be backed up too. Also, account for the possibility of head injury, don't rely only on your brain. As you age, you get more forgetful, and might not remember a password you set 5 years ago ;o.




. This is the same drive that was in imminent fail mode, right
? So, now I know that HDS is subject to environmental distortion
.
.