On Thu, Apr 02, 2015 at 09:58:39AM +0000, Andy Smith wrote: > Hi Hugo, > > Thanks for your help.
Makes a change from you answering my questions. :) > On Wed, Apr 01, 2015 at 03:42:02PM +0000, Hugo Mills wrote: > > On Wed, Apr 01, 2015 at 03:11:14PM +0000, Andy Smith wrote: > > > Should I run a scrub as well? > > > > Yes. The output you've had so far will be just the pieces that the > > FS has tried to read, and where, as a result, it's been able to detect > > the out-of-date data. A scrub will check and fix everything. > > Thanks, things seem to be fine now. :) > > What's the difference between "verufy" and "csum" here? verify would be where the internal consistency checks for metadata failed. That might be, for example, where it's detected that a tree node has a newer transaction ID (effectively a monotonic timestamp) than its parent. This should never happen, so the parent is probably out of date. If there's another copy of the metadata that doesn't have the same problem, it can be used to repair the obviously-wrong copy. csum is where the checksum validation failed -- this would be, for example, where some data was modified on one copy and left unchanged on the older copy, but the metadata for both copies was updated. In that case, the data on the out-of-date drive wouldn't match the checksum, and needs to be updated from the good copy. Hugo. > scrub status for 472ee2b3-4dc3-4fc1-80bc-5ba967069ceb > scrub device /dev/sdh (id 2) history > scrub started at Wed Apr 1 20:05:58 2015 and finished after 14642 > seconds > total bytes scrubbed: 383.42GiB with 0 errors > scrub device /dev/sdg (id 3) history > scrub started at Wed Apr 1 20:05:58 2015 and finished after 14504 > seconds > total bytes scrubbed: 382.62GiB with 0 errors > scrub device /dev/sdf (id 4) history > scrub started at Wed Apr 1 20:05:58 2015 and finished after 14436 > seconds > total bytes scrubbed: 383.00GiB with 0 errors > scrub device /dev/sdk (id 5) history > scrub started at Wed Apr 1 20:05:58 2015 and finished after 21156 > seconds > total bytes scrubbed: 1.13TiB with 14530 errors > error details: verify=10909 csum=3621 > corrected errors: 14530, uncorrectable errors: 0, unverified errors: 0 > scrub device /dev/sdj (id 6) history > scrub started at Wed Apr 1 20:05:58 2015 and finished after 5693 > seconds > total bytes scrubbed: 119.42GiB with 0 errors > scrub device /dev/sde (id 7) history > scrub started at Wed Apr 1 20:05:58 2015 and finished after 5282 > seconds > total bytes scrubbed: 114.45GiB with 0 errors > > Cheers, > Andy -- Hugo Mills | Debugging is like hitting yourself in the head with hugo@... carfax.org.uk | hammer: it feels so good when you find the bug, and http://carfax.org.uk/ | you're allowed to stop debugging. PGP: 65E74AC0 | PotatoEngineer
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