On Thu, Oct 08, 2015 at 07:47:33AM -0400, Austin S Hemmelgarn wrote: > On 2015-10-08 04:28, Pavel Pisa wrote: > >I go to use "btrfs replace" because there has not been any reply to my inplace correction > >question. But I expect that clarification if possible/how to resync RAID1 after one > >drive temporal disappear is really important to many of BTRFS users. > As of right now, there is no way that I know of to safely re-sync a > drive that's been disconnected for a while. The best bet is > probably to use replace, but for that to work reliably, you would > need to tell it to ignore the now stale drive when trying to read > each chunk. Scrub is officially what you need there. I can confirm that it works correctly, having used it myself after accidentally unplugging the wrong drive. Hugo. (Sorry for the delay, I wrote this earlier, but had trouble sending it) > It is theoretically possible to wipe the FS signature on the out-of > sync drive, run a device scan, then run 'replace missing' pointing > at the now 'blank' device, although going that route is really > risky. > -- Hugo Mills | Gomez, darling, don't torture yourself. hugo@... carfax.org.uk | That's my job. http://carfax.org.uk/ | PGP: E2AB1DE4 | Morticia Addams
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