On Mon, 23 Jul 2012 20:24:10 +0200, dexen deVries wrote: > Hi again, > > > I've copied the whole filesystem elsewhere (to a file) with `ddrescue'. It > found > one damaged area on the drive, but apparently neither at start nor at the end > of partition. > > The FS on the drive was marked as `dirty' (requiring recovery upon mount). My > guess is that kernel attempted recovery, and gave up upon read error. > > Unfortunately, the `norecovery' option did not help with the drive; it only > helped once i've moved whole FS to file. > > > Log from ddrescue: > > > # Rescue Logfile. Created by GNU ddrescue version 1.14 > # Command line: ddrescue /dev/sdc3 sda3 sda3.log > # current_pos current_status > 0x149E0CCC00 + > # pos size status > 0x00000000 0x149E0CC000 + > 0x149E0CC000 0x00001000 - > 0x149E0CD000 0x11220D3000 + > > > my understanding is, the following line describes the damaged area, format: > start length status-marker (`-' for error) > 0x149E0CC000 0x00001000 - > > > Once the FS was copied to a file, it mounted correctly: > # mount -o ro,loop,norecovery ./sda3.img ./some-mountpoint > > > My gripe with current (linux-3.5.0) NILFS2 driver is that I couldn't tell it > to ignore read errors and thus force it to mount the filesystem.
Good point. The current recovery logic is intentionally implemented so that it aborts when having met an I/O error. This treatment should not be applied at least if the norecovery option is specified. Thanks, Ryusuke Konishi > Ony after I've > moved some 160GB of FS to a file (that's a bit tedious :P) it opened the FS > just fine. > > > Cheers, > -- > dexen deVries > > 1972 - Dennis Ritchie invents a powerful gun that shoots both forward and > backward simultaneously. Not satisfied with the number of deaths and > permanent > maimings from that invention he invents C and Unix. > -- > To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
