Since I've been running days longer than previously (since the trouble started at the star of October) with no errors at all, it seems to have been a hardware problem. (One can imagine software problems that depended on an odd structure in the original file system, and I didn't copy the file system bytes: I copied its files into a new, empty file system. Even so, that possibility seems unlikely.) I don't think it was a fundamental mismatch between device and software, since I've had the SSD in the machine for about two years without fuss.
I've got two remaining questions: what was the actual hardware error, and why did it not show up as a hardware error to the software (or if the hardware did try to signal it, why didn't the software diagnose that right away)? I've kept the old SSD, and when I've got some spare time I hope to experiment with it in another system, to see whether it misbehaves there, undetectably. It's tricky to do experiments with a device and a system that are being used for production (ie, paying) work. Now I can try the upgrade to 12.10 ... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/992424 Title: ext4 filesystem errors on SSD disk To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/992424/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
