Hallo, Jeff, Du meintest am 10.10.11: >>>> Oct 7 18:16:55 Arktur kernel: ata5.00: exception Emask 0x0 >>>> SAct 0x0 SErr 0x0 action 0x0 [...] >> I've just worked again with the 2 unreadable files. >> >> Copying them to another partition stopped somewhere, one time/file >> at about 98%, the other time at about 2%. [...] > I'd try replacing the SATA cable and if that doesn't fix it up, you > may be out of luck. There are 2 unreadable sectors (reproducable). Changing or re-mounting the cables doesn't help. > The thing is that marking sectors bad is a > (pretty poor) band-aid for a much bigger problem: If you're hitting > persistent read errors and re-writing the blocks doesn't fix it, your > disk is already close to being completely kaput and no amount of > software is going to help with that. The next steps could be: - adding a new 2-TByte disk (now there are 3 2-TByte disks) - balancing - removing the bad 2-TByte disk But I'm afraid when I run balancing then the bad sectors damage big parts of the contents. I've had such bad luck about 1 year ago, losing about 2 TByte of data (ok - I had a kind of backup in a neighbout town). I don't like to reproduce this experience. I'm afraid I have to buy 3 (or 4) 2-TByte disks, building them as a new raid0-data cluster and copy the complete contents from the old cluster to the new one. Doesn't sound good. ----------------------- 2 bad sectors from a total of 4*10^9 sectors is (in another point of view) no bad error rate ... Viele Gruesse! Helmut -- 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
