Created attachment 522186 [details] dmesg with kernel bug messages Description of problem: When I try to make a backup to a 2T external USB disk, I sometimes get kernel bugs. Version-Release number of selected component (if applicable): 2.6.40.4-5.fc15.x86_64 How reproducible: Just happens now and then. Steps to Reproduce: 1. rdiffbackup to external btrfs disk. Actual results: See a bug message. Expected results: No bugs. Additional info: See attached dmesg output with bug messages.
Somethings gone wrong with your drive [ 6018.455644] sd 7:0:0:0: [sdd] Unhandled error code [ 6018.455649] sd 7:0:0:0: [sdd] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK [ 6018.455654] sd 7:0:0:0: [sdd] CDB: Read(10): 28 00 03 ab b7 10 00 00 08 00 [ 6018.455666] end_request: I/O error, dev sdd, sector 61585168 [ 6018.457426] lost page write due to I/O error on sdd1 [ 6018.457464] lost page write due to I/O error on sdd1 [ 6018.457492] lost page write due to I/O error on sdd1 [ 6018.457500] btrfs: 1 errors while writing supers And we barely handle corrupt metadata well, much less IO errors in critical paths :).