Nope, rdump doesn't work either. debugfs: rdump -v / /tmp Copying to /tmp/ rdump: Bad magic number in inode while reading inode 129 rdump: Bad magic number in inode while recursively dumping inode 129
Could you please confirm that it's enough to just force the return value of 0 at "ocfs2_validate_meta_ecc" in order to bypass the ECC checks?
On 10.11.2012 03:55, Sunil Mushran wrote:
If global bitmap is gone. then the fs is unusable. But you can extract data usingthe rdump command in debugfs.ocfs. The success depends on how much of the device is still usable.On Fri, Nov 9, 2012 at 5:50 PM, Marian Serban <mar...@easic.ro <mailto:mar...@easic.ro>> wrote:I tried hacking the fsck.ocfs2 source code by not considering metaecc flag. Then I ran into journal recovery: Bad magic number in inode while looking up the journal inode for slot 0 fsck encountered unrecoverable errors while replaying the journals and will not continue After bypassing journal replay function, I got Pass 0a: Checking cluster allocation chains pass0: Bad magic number in inode while looking up the global bitmap inode fsck.ocfs2: Bad magic number in inode while performing pass 0 Does it mean the filesystem is destroyed completely? On 10.11.2012 02:54, Marian Serban wrote:That's the kernel: Linux ro02xsrv003.bv.easic.ro <http://ro02xsrv003.bv.easic.ro> 2.6.39.4 #6 SMP Mon Dec 12 12:09:49 EET 2011 x86_64 x86_64 x86_64 GNU/Linux Anyway, I tried disabling the metaecc feature, no luck. [root@ro02xsrv003 ~]# tunefs.ocfs2 --fs-features=nometaecc /dev/mapper/volgr1-lvol0 tunefs.ocfs2: I/O error on channel while opening device "/dev/mapper/volgr1-lvol0" These are the last lines of strace corresponding to the tunefs.ocfs command: open("/sys/fs/ocfs2/cluster_stack", O_RDONLY) = 4 fstat(4, {st_mode=S_IFREG|0644, st_size=4096, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f54aad05000 read(4, "o2cb\n", 4096) = 5 close(4) = 0 munmap(0x7f54aad05000, 4096) = 0 open("/sys/fs/o2cb/interface_revision", O_RDONLY) = 4 read(4, "5\n", 15) = 2 read(4, "", 13) = 0 close(4) = 0 stat("/sys/kernel/config", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 statfs("/sys/kernel/config", {f_type=0x62656570, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096}) = 0 open("/dev/mapper/volgr1-lvol0", O_RDONLY) = 4 ioctl(4, BLKSSZGET, 0x7fffce711454) = 0 close(4) = 0 pread(3, "\0\0\v\25\37\1\200\200\202@\21\2\30\26\0\0\0,\17\272\241\4\340\210\311\377\17\300\327\332\373\17"..., 4096, 532480) = 4096 close(3) = 0 write(2, "tunefs.ocfs2", 12tunefs.ocfs2) = 12 write(2, ": ", 2: ) = 2 write(2, "I/O error on channel", 20I/O error on channel) = 20 write(2, " ", 1 ) = 1 write(2, "while opening device \"/dev/mappe"..., 47while opening device "/dev/mapper/volgr1-lvol0") = 47 write(2, "\r\n", 2 On 10.11.2012 02:06, Sunil Mushran wrote:It's either that or a check sum problem. Disable metaecc. Not sure which kernel you are running. We had fixed few problems few years ago around this. If your kernel is older, then it could be a known issue. On Fri, Nov 9, 2012 at 12:50 PM, Marian Serban <mar...@easic.ro <mailto:mar...@easic.ro>> wrote: Hi Sunil, Thank you for answering. Unfortunately, it doesn't seem like it's a hardware problem. There's no way a cable can be loose because it's iSCSI over 1G Ethernet (copper wires) environment. Also I performed "dd if=/dev/.... of=/dev/null" and first 16GB or so are fine. "Dmesg" shows no errors. Also tried with debugfs.ocfs2: [root@ro02xsrv003 ~]# debugfs.ocfs2 /dev/mapper/volgr1-lvol0 debugfs.ocfs2 1.6.3 debugfs: ls ls: Bad magic number in inode '.' debugfs: slotmap slotmap: Bad magic number in inode while reading slotmap system file debugfs: stats Revision: 0.90 Mount Count: 0 Max Mount Count: 20 State: 0 Errors: 0 Check Interval: 0 Last Check: Fri Nov 9 14:35:53 2012 Creator OS: 0 Feature Compat: 3 backup-super strict-journal-super Feature Incompat: 16208 sparse extended-slotmap inline-data metaecc xattr indexed-dirs refcount discontig-bg Tunefs Incomplete: 0 Feature RO compat: 7 unwritten usrquota grpquota Root Blknum: 129 System Dir Blknum: 130 First Cluster Group Blknum: 64 Block Size Bits: 12 Cluster Size Bits: 18 Max Node Slots: 10 Extended Attributes Inline Size: 256 Label: SAN UUID: B4CF8D4667AF43118F3324567B90A987 Hash: 3698209293 (0xdc6e320d) DX Seed[0]: 0x9f4a2bb7 DX Seed[1]: 0x501ddac0 DX Seed[2]: 0x6034bfe8 Cluster stack: classic o2cb Inode: 2 Mode: 00 Generation: 1093568923 (0x412e899b) FS Generation: 1093568923 (0x412e899b) CRC32: 46f2d360 ECC: 04d4 Type: Unknown Attr: 0x0 Flags: Valid System Superblock Dynamic Features: (0x0) User: 0 (root) Group: 0 (root) Size: 0 Links: 0 Clusters: 45340448 ctime: 0x4ee67f67 -- Tue Dec 13 00:25:43 2011 atime: 0x0 -- Thu Jan 1 02:00:00 1970 mtime: 0x4ee67f67 -- Tue Dec 13 00:25:43 2011 dtime: 0x0 -- Thu Jan 1 02:00:00 1970 ctime_nsec: 0x00000000 -- 0 atime_nsec: 0x00000000 -- 0 mtime_nsec: 0x00000000 -- 0 Refcount Block: 0 Last Extblk: 0 Orphan Slot: 0 Sub Alloc Slot: Global Sub Alloc Bit: 65535 Marian _______________________________________________ Ocfs2-users mailing list Ocfs2-users@oss.oracle.com <mailto:Ocfs2-users@oss.oracle.com> https://oss.oracle.com/mailman/listinfo/ocfs2-users
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