Dmitry Katsubo posted on Tue, 19 Apr 2016 07:45:40 +0200 as excerpted: > Actually btrfs restore has recovered many files, however I was not able > to run in fully unattended mode as it complains about "looping a lot". > Does it mean that files are corrupted / not correctly restored? As long as you tell it to keep going each time, the loop complaints shouldn't be an issue. The problem is that the loop counter is measuring loops on a particular directory, because that's what it has available to measure. But if you had a whole bunch of files in that dir, it's /going/ to loop a lot, to restore all of them. I have one cache directory with over 200K files in it. They're all text messages from various technical lists and newsgroups (like this list, which I view as a newsgroup using gmane.org's list2news service) so they're quite small, about 5 KiB on average by my quick calculation, but that's still a LOT of files for a single dir, even if they're only using just over a GiB of space. I ended up doing a btrfs restore on that filesystem (/home), because while I had a backup, restore was getting more recent copies of stuff back, and that dir looped a *LOT* the first time it happened, now several years ago, before they actually added the always option. The second time it happened, about a year ago, restore worked much better, and I was able to use the always option. But AFAIK, always only applies to that dir. If you have multiple dirs with the problem, you'll still get asked for the next one. But it did vastly improve the situation for me, giving me only a handful of prompts instead of the very many I had before the option was there. (The main problem triggering the need to run restore for me, turned out to be hardware. I've had no issues since I replaced that failing ssd, and with a bit of luck, won't be running restore again for a few years, now.) -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
