this is very instructive : http://oss.sgi.com/projects/xfs/training/xfs_slides_12_triage.pdf everyone should read it once , and it's quiet fast and easy to read
hch notes that various arm nas devices mount with -o nonarrier
hch: and went into 2.6.27 hch: commit ae23a5e87dbbf4657a82e1ff8ebc52ab50361c14
hch: oh, that was for the old arm ABI hch: and went into 2.6.27 hch: commit ae23a5e87dbbf4657a82e1ff8ebc52ab50361c14 hch: it's all dir code though, what you seem to be hitting # Get:1 http://ftp.fr.debian.org lenny/main xfsprogs 2.9.8-1lenny1 [1524kB] LS-WTGL490:~# xfs_check /dev/sda6 cache_node_purge: refcount was 1, not zero (node=0xa3688) xfs_check: cannot read root inode (22) cache_node_purge: refcount was 1, not zero (node=0xa5ea8) xfs_check: cannot read realtime bitmap inode (22) /usr/sbin/xfs_check: line 28: 30457 Segmentation fault xfs_db$DBOPTS -i -p xfs_check -c "check$OPTS" $1 sudo mdadm --examine --brief --scan --verbose ARRAY /dev/md0 level=raid1 num-devices=2 UUID=033cc573:5641c370:b3a75a35:acb61a68 devices=/dev/sdb1,/dev/sda1 ARRAY /dev/md1 level=raid1 num-devices=2 UUID=ad5cf22b:216c00db:c4034e8b:f7349a77 devices=/dev/sdb2,/dev/sda2 ARRAY /dev/md10 level=raid1 num-devices=2 UUID=9a09aaa6:aa7b4009:b597d2f0:16e1d4df devices=/dev/sdb5,/dev/sda5 xfs_check /dev/sda6 xfs_check: cannot read root inode (22) bad agf magic # 0 in ag 0 bad agf version # 0 in ag 0 block 0/0 expected type unknown got sb bad agi magic # 0 in ag 0 bad agi version # 0 in ag 0 bad magic # 0x58465342 in btbno block 0/0 bad magic # 0x58465342 in btcnt block 0/0 bad magic # 0x58465342 in inobt block 0/0 agi unlinked bucket 0 is 0 in ag 0 (inode=0) agi unlinked bucket 1 is 0 in ag 0 (inode=0) dmesg http://madduck.net/blog/2006.08.30:lvm-for-filesystem-recovery/ scsi1 : Marvell SCSI to SATA adapter ** BUFFALO Disable Command Queuing Function [0 0] ** ** BUFFALO Disable Command Queuing Function [0 1] ** Vendor: SAMSUNG Model: HD103UJ Rev: 1AA0 Type: Direct-Access ANSI SCSI revision: 03 Vendor: SAMSUNG Model: HD103UJ Rev: 1AA0 Type: Direct-Access ANSI SCSI revision: 03 Linux IAL (ERROR) : retry command host=0, bus=0 SCpnt = c1447ba0 SCSI device sda: 1953525168 512-byte hdwr sectors (1000205 MB) sda: Write Protect is off sda: Mode Sense: 23 00 00 00 SCSI device sda: drive cache: write back SCSI device sda: 1953525168 512-byte hdwr sectors (1000205 MB) sda: Write Protect is off sda: Mode Sense: 23 00 00 00 SCSI device sda: drive cache: write back sda: sda1 sda2 sda4 < sda5 sda6 > sd 0:0:0:0: Attached scsi disk sda Linux IAL (ERROR) : retry command host=1, bus=1 SCpnt = c1447ba0 SCSI device sdb: 1953525168 512-byte hdwr sectors (1000205 MB) sdb: Write Protect is off sdb: Mode Sense: 23 00 00 00 SCSI device sdb: drive cache: write back SCSI device sdb: 1953525168 512-byte hdwr sectors (1000205 MB) sdb: Write Protect is off sdb: Mode Sense: 23 00 00 00 SCSI device sdb: drive cache: write back sdb: sdb1 sdb2 sdb4 < sdb5 sdb6 > sd 1:0:0:0: Attached scsi disk sdb sd 0:0:0:0: Attached scsi generic sg0 type 0 sd 1:0:0:0: Attached scsi generic sg1 type 0 physmap flash device: 40000 at ff800000 CFI: Found no phys_mapped_flash device at location zero >jedec_probe Found: SST 39LF020 phys_mapped_flash: Found 1 x8 devices at 0x0 in 8-bit bank number of JEDEC chips: 1 cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness. cmdlinepart partition parsing not available RedBoot partition parsing not available mice: PS/2 mouse device common for all mice md: raid0 personality registered for level 0 md: raid1 personality registered for level 1 md: md driver 0.90.3 MAX_MD_DEVS=256, MD_SB_DISKS=27 md: bitmap version 4.39 Kernel event proc (C) BUFFALO INC. V.1.00 installed. MICON ctrl (C) BUFFALO INC. V.1.00 installed. mvGppValueSet: Err. An attempt to set output value to GPP 8 in input mode. Buffalo CPU Inerupts Driver (C) BUFFALO INC. Ver.0.01 alpha1 installed. mvGppValueSet: Err. An attempt to set output value to GPP 2 in input mode. Buffalo Gpio Control Driver (C) BUFFALO INC. Ver.0.02 installed. NET: Registered protocol family 2 IP route cache hash table entries: 2048 (order: 1, 8192 bytes) TCP established hash table entries: 8192 (order: 3, 32768 bytes) TCP bind hash table entries: 8192 (order: 3, 32768 bytes) TCP: Hash tables configured (established 8192 bind 8192) TCP reno registered TCP bic registered NET: Registered protocol family 1 NET: Registered protocol family 17 md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. RAMDISK: Compressed image found at block 0 VFS: Mounted root (ext2 filesystem). md: md10 stopped. md: md1 stopped. md: md0 stopped. md: bind<sda1> md: bind<sdb1> md: kicking non-fresh sda1 from array! md: unbind<sda1> md: export_rdev(sda1) raid1: raid set md0 active with 1 out of 2 mirrors kjournald starting. Commit interval 5 seconds EXT3 FS on md0, internal journal EXT3-fs: mounted filesystem with ordered data mode. md: md10 stopped. md: bind<sda5> md: bind<sdb5> md: kicking non-fresh sda5 from array! md: unbind<sda5> md: export_rdev(sda5) raid1: raid set md10 active with 1 out of 2 mirrors md: md1 stopped. md: bind<sda2> md: bind<sdb2> md: kicking non-fresh sda2 from array! md: unbind<sda2> md: export_rdev(sda2) raid1: raid set md1 active with 1 out of 2 mirrors XFS mounting filesystem md1 Starting XFS recovery on filesystem: md1 (logdev: internal) Ending XFS recovery on filesystem: md1 (logdev: internal) XFS mounting filesystem md1 Ending clean XFS mount for filesystem: md1 VFS: Mounted root (xfs filesystem). Trying to move old root to /initrd ... okay Freeing init memory: 116K Adding 1003896k swap on /dev/md10. Priority:-1 extents:1 across:1003896k kjournald starting. Commit interval 5 seconds EXT3 FS on md0, internal journal EXT3-fs: mounted filesystem with ordered data mode. usbcore: registered new driver usbfs usbcore: registered new driver hub ehci_platform ehci_platform.4523: EHCI Platform Host Controller ehci_platform ehci_platform.4523: new USB bus registered, assigned bus number 1 ehci_platform ehci_platform.4523: irq 17, io mem 0x00000000 ehci_platform ehci_platform.4523: USB 0.0 started, EHCI 1.00, driver 10 Dec 2004 usb usb1: configuration #1 chosen from 1 choice hub 1-0:1.0: USB hub found hub 1-0:1.0: 1 port detected ehci_platform ehci_platform.16781: EHCI Platform Host Controller ehci_platform ehci_platform.16781: new USB bus registered, assigned bus number 2 ehci_platform ehci_platform.16781: irq 12, io mem 0x00000000 ehci_platform ehci_platform.16781: USB 0.0 started, EHCI 1.00, driver 10 Dec 2004 usb usb2: configuration #1 chosen from 1 choice hub 2-0:1.0: USB hub found hub 2-0:1.0: 1 port detected Initializing USB Mass Storage driver... usbcore: registered new driver usb-storage USB Mass Storage support registered. usbcore: registered new driver usblp drivers/usb/class/usblp.c: v0.13: USB Printer Device Class driver eth0: link down eth0: link up<5>, full duplex<5>, speed 100 Mbps<5> md: bind<sda1> RAID1 conf printout: --- wd:1 rd:2 disk 0, wo:1, o:1, dev:sda1 disk 1, wo:0, o:1, dev:sdb1 md: syncing RAID array md0 md: minimum _guaranteed_ reconstruction speed: 1000 KB/sec/disc. md: using maximum available idle IO bandwidth (but not more than 50000 KB/sec) for reconstruction. md: using 128k window, over a total of 1003904 blocks. md: bind<sda2> RAID1 conf printout: --- wd:1 rd:2 disk 0, wo:1, o:1, dev:sda2 disk 1, wo:0, o:1, dev:sdb2 md: delaying resync of md1 until md0 has finished resync (they share one or more physical units) md: bind<sda5> RAID1 conf printout: --- wd:1 rd:2 disk 0, wo:1, o:1, dev:sda5 disk 1, wo:0, o:1, dev:sdb5 md: delaying resync of md10 until md1 has finished resync (they share one or more physical units) XFS mounting filesystem sda6 Starting XFS recovery on filesystem: sda6 (logdev: internal) XFS: failed to read root inode XFS mounting filesystem sdb6 Starting XFS recovery on filesystem: sdb6 (logdev: internal) Ending XFS recovery on filesystem: sdb6 (logdev: internal) md: md0: sync done. md: delaying resync of md10 until md1 has finished resync (they share one or more physical units) md: delaying resync of md1 until md10 has finished resync (they share one or more physical units) RAID1 conf printout: --- wd:2 rd:2 disk 0, wo:0, o:1, dev:sda1 disk 1, wo:0, o:1, dev:sdb1 md: syncing RAID array md10 md: minimum _guaranteed_ reconstruction speed: 1000 KB/sec/disc. md: using maximum available idle IO bandwidth (but not more than 50000 KB/sec) for reconstruction. md: using 128k window, over a total of 1003904 blocks. md: md10: sync done. md: syncing RAID array md1 md: minimum _guaranteed_ reconstruction speed: 1000 KB/sec/disc. md: using maximum available idle IO bandwidth (but not more than 50000 KB/sec) for reconstruction. md: using 128k window, over a total of 5004160 blocks. RAID1 conf printout: --- wd:2 rd:2 disk 0, wo:0, o:1, dev:sda5 disk 1, wo:0, o:1, dev:sdb5 NET: Registered protocol family 5 BuffaloSwPollingCheck> SW_POWER_ON XFS mounting filesystem sda6 Starting XFS recovery on filesystem: sda6 (logdev: internal) XFS: failed to read root inode md: md1: sync done. RAID1 conf printout: --- wd:2 rd:2 disk 0, wo:0, o:1, dev:sda2 disk 1, wo:0, o:1, dev:sdb2 XFS mounting filesystem sda6 Starting XFS recovery on filesystem: sda6 (logdev: internal) XFS: failed to read root inode
http://oss.sgi.com/archives/xfs/2003-12/msg01066.html
http://xfs.org/docs/xfsdocs-xml-dev/XFS_User_Guide/tmp/en-US/html/ch11s14.html
LS-WTGL490:/# dmesg Linux version 2.6.16.16-arm1 (root@I.You) (gcc version 3.4.4 (release) (CodeSourcery ARM 2005q3-2)) #1 Wed Jan 21 10:23:54 JST 2009 CPU: ARM926EJ-Sid(wb) [41069260] revision 0 (ARMv5TEJ) Machine: MV-88fxx81 Using UBoot passing parameters structure Sys Clk = 250000000, Tclk = 166664740 - Warning - This LSP release was tested only with U-Boot release 1.7.3 Memory policy: ECC disabled, Data cache writeback On node 0 totalpages: 32768 DMA zone: 32768 pages, LIFO batch:7 DMA32 zone: 0 pages, LIFO batch:0 Normal zone: 0 pages, LIFO batch:0 HighMem zone: 0 pages, LIFO batch:0 CPU0: D VIVT write-back cache CPU0: I cache: 32768 bytes, associativity 1, 32 byte lines, 1024 sets CPU0: D cache: 32768 bytes, associativity 1, 32 byte lines, 1024 sets Built 1 zonelists Kernel command line: console=ttyS0,115200 root=/dev/sda2 rw initrd=0x00800040,15M panic=5 func=0 BOOTVER=1.13 PID hash table entries: 1024 (order: 10, 16384 bytes) Console: colour dummy device 80x30 Dentry cache hash table entries: 32768 (order: 5, 131072 bytes) Inode-cache hash table entries: 16384 (order: 4, 65536 bytes) Memory: 128MB 0MB 0MB 0MB = 128MB total Memory: 110592KB available (2996K code, 554K data, 116K init) Calibrating delay loop... 266.24 BogoMIPS (lpj=1331200) Mount-cache hash table entries: 512 CPU: Testing write buffer coherency: ok checking if image is initramfs...it isn't (no cpio magic); looks like an initrd Freeing initrd memory: 15360K NET: Registered protocol family 16 FLASH boardId = 1b Flash bankwidth 1, base ff800000, size 40000 BUFFALO LS_WTGL_R1_V3 FLASH size 256[KB] Marvell Development Board (LSP Version 1.7.8_NAS)-- BUFFALO_BOARD_LS_WTGL_R1_V3 Detected Tclk 166664740 and SysClk 250000000 Marvell USB EHCI Host controller #0: c16f5e00 Marvell USB EHCI Host controller #1: c16f5c00 pexBarOverlapDetect: winNum 2 overlap current 0 mvPexInit:Warning :Bar 2 size is illigal it will be disabled please check Pex and CPU windows configuration PCI: bus0: Fast back to back transfers enabled PCI: bus1: Fast back to back transfers enabled SCSI subsystem initialized use IDMA acceleration in copy to/from user buffers. used channels 2 and 3 Done. cesadev_init(c0011d34) Fast Floating Point Emulator V0.9 (c) Peter Teichmann. SGI XFS with large block numbers, no debug enabled Initializing Cryptographic API io scheduler noop registered (default) io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled serial8250: ttyS0 at MMIO 0x0 (irq = 3) is a 16550A serial8250: ttyS1 at MMIO 0x0 (irq = 4) is a 16550A RAMDISK driver initialized: 3 RAM disks of 16384K size 1024 blocksize loop: loaded (max 8 devices) Marvell Gigabit Ethernet Driver 'egiga': o Ethernet descriptors in DRAM o DRAM SW cache-coherency o Checksum offload enabled o Loading network interface ** egiga_init_module (0) 'eth0' Intergrated Sata device found scsi0 : Marvell SCSI to SATA adapter scsi1 : Marvell SCSI to SATA adapter ** BUFFALO Disable Command Queuing Function [0 0] ** ** BUFFALO Disable Command Queuing Function [0 1] ** Vendor: SAMSUNG Model: HD103UJ Rev: 1AA0 Type: Direct-Access ANSI SCSI revision: 03 Vendor: SAMSUNG Model: HD103UJ Rev: 1AA0 Type: Direct-Access ANSI SCSI revision: 03 Linux IAL (ERROR) : retry command host=0, bus=0 SCpnt = c1447ba0 SCSI device sda: 1953525168 512-byte hdwr sectors (1000205 MB) sda: Write Protect is off sda: Mode Sense: 23 00 00 00 SCSI device sda: drive cache: write back SCSI device sda: 1953525168 512-byte hdwr sectors (1000205 MB) sda: Write Protect is off sda: Mode Sense: 23 00 00 00 SCSI device sda: drive cache: write back sda: sda1 sda2 sda4 < sda5 sda6 > sd 0:0:0:0: Attached scsi disk sda Linux IAL (ERROR) : retry command host=1, bus=1 SCpnt = c1447ba0 SCSI device sdb: 1953525168 512-byte hdwr sectors (1000205 MB) sdb: Write Protect is off sdb: Mode Sense: 23 00 00 00 SCSI device sdb: drive cache: write back SCSI device sdb: 1953525168 512-byte hdwr sectors (1000205 MB) sdb: Write Protect is off sdb: Mode Sense: 23 00 00 00 SCSI device sdb: drive cache: write back sdb: sdb1 sdb2 sdb4 < sdb5 sdb6 > sd 1:0:0:0: Attached scsi disk sdb sd 0:0:0:0: Attached scsi generic sg0 type 0 sd 1:0:0:0: Attached scsi generic sg1 type 0 physmap flash device: 40000 at ff800000 CFI: Found no phys_mapped_flash device at location zero >jedec_probe Found: SST 39LF020 phys_mapped_flash: Found 1 x8 devices at 0x0 in 8-bit bank number of JEDEC chips: 1 cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness. cmdlinepart partition parsing not available RedBoot partition parsing not available mice: PS/2 mouse device common for all mice md: raid0 personality registered for level 0 md: raid1 personality registered for level 1 md: md driver 0.90.3 MAX_MD_DEVS=256, MD_SB_DISKS=27 md: bitmap version 4.39 Kernel event proc (C) BUFFALO INC. V.1.00 installed. MICON ctrl (C) BUFFALO INC. V.1.00 installed. mvGppValueSet: Err. An attempt to set output value to GPP 8 in input mode. Buffalo CPU Inerupts Driver (C) BUFFALO INC. Ver.0.01 alpha1 installed. mvGppValueSet: Err. An attempt to set output value to GPP 2 in input mode. Buffalo Gpio Control Driver (C) BUFFALO INC. Ver.0.02 installed. NET: Registered protocol family 2 IP route cache hash table entries: 2048 (order: 1, 8192 bytes) TCP established hash table entries: 8192 (order: 3, 32768 bytes) TCP bind hash table entries: 8192 (order: 3, 32768 bytes) TCP: Hash tables configured (established 8192 bind 8192) TCP reno registered TCP bic registered NET: Registered protocol family 1 NET: Registered protocol family 17 md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. RAMDISK: Compressed image found at block 0 VFS: Mounted root (ext2 filesystem). md: md10 stopped. md: md1 stopped. md: md0 stopped. md: bind<sda1> md: bind<sdb1> md: kicking non-fresh sda1 from array! md: unbind<sda1> md: export_rdev(sda1) raid1: raid set md0 active with 1 out of 2 mirrors kjournald starting. Commit interval 5 seconds EXT3 FS on md0, internal journal EXT3-fs: mounted filesystem with ordered data mode. md: md10 stopped. md: bind<sda5> md: bind<sdb5> md: kicking non-fresh sda5 from array! md: unbind<sda5> md: export_rdev(sda5) raid1: raid set md10 active with 1 out of 2 mirrors md: md1 stopped. md: bind<sda2> md: bind<sdb2> md: kicking non-fresh sda2 from array! md: unbind<sda2> md: export_rdev(sda2) raid1: raid set md1 active with 1 out of 2 mirrors XFS mounting filesystem md1 Starting XFS recovery on filesystem: md1 (logdev: internal) Ending XFS recovery on filesystem: md1 (logdev: internal) XFS mounting filesystem md1 Ending clean XFS mount for filesystem: md1 VFS: Mounted root (xfs filesystem). Trying to move old root to /initrd ... okay Freeing init memory: 116K Adding 1003896k swap on /dev/md10. Priority:-1 extents:1 across:1003896k kjournald starting. Commit interval 5 seconds EXT3 FS on md0, internal journal EXT3-fs: mounted filesystem with ordered data mode. usbcore: registered new driver usbfs usbcore: registered new driver hub ehci_platform ehci_platform.4523: EHCI Platform Host Controller ehci_platform ehci_platform.4523: new USB bus registered, assigned bus number 1 ehci_platform ehci_platform.4523: irq 17, io mem 0x00000000 ehci_platform ehci_platform.4523: USB 0.0 started, EHCI 1.00, driver 10 Dec 2004 usb usb1: configuration #1 chosen from 1 choice hub 1-0:1.0: USB hub found hub 1-0:1.0: 1 port detected ehci_platform ehci_platform.16781: EHCI Platform Host Controller ehci_platform ehci_platform.16781: new USB bus registered, assigned bus number 2 ehci_platform ehci_platform.16781: irq 12, io mem 0x00000000 ehci_platform ehci_platform.16781: USB 0.0 started, EHCI 1.00, driver 10 Dec 2004 usb usb2: configuration #1 chosen from 1 choice hub 2-0:1.0: USB hub found hub 2-0:1.0: 1 port detected Initializing USB Mass Storage driver... usbcore: registered new driver usb-storage USB Mass Storage support registered. usbcore: registered new driver usblp drivers/usb/class/usblp.c: v0.13: USB Printer Device Class driver eth0: link down eth0: link up<5>, full duplex<5>, speed 100 Mbps<5> md: bind<sda1> RAID1 conf printout: --- wd:1 rd:2 disk 0, wo:1, o:1, dev:sda1 disk 1, wo:0, o:1, dev:sdb1 md: syncing RAID array md0 md: minimum _guaranteed_ reconstruction speed: 1000 KB/sec/disc. md: using maximum available idle IO bandwidth (but not more than 50000 KB/sec) for reconstruction. md: using 128k window, over a total of 1003904 blocks. md: bind<sda2> RAID1 conf printout: --- wd:1 rd:2 disk 0, wo:1, o:1, dev:sda2 disk 1, wo:0, o:1, dev:sdb2 md: delaying resync of md1 until md0 has finished resync (they share one or more physical units) md: bind<sda5> RAID1 conf printout: --- wd:1 rd:2 disk 0, wo:1, o:1, dev:sda5 disk 1, wo:0, o:1, dev:sdb5 md: delaying resync of md10 until md1 has finished resync (they share one or more physical units) XFS mounting filesystem sda6 Starting XFS recovery on filesystem: sda6 (logdev: internal) XFS: failed to read root inode XFS mounting filesystem sdb6 Starting XFS recovery on filesystem: sdb6 (logdev: internal) Ending XFS recovery on filesystem: sdb6 (logdev: internal) md: md0: sync done. md: delaying resync of md10 until md1 has finished resync (they share one or more physical units) md: delaying resync of md1 until md10 has finished resync (they share one or more physical units) RAID1 conf printout: --- wd:2 rd:2 disk 0, wo:0, o:1, dev:sda1 disk 1, wo:0, o:1, dev:sdb1 md: syncing RAID array md10 md: minimum _guaranteed_ reconstruction speed: 1000 KB/sec/disc. md: using maximum available idle IO bandwidth (but not more than 50000 KB/sec) for reconstruction. md: using 128k window, over a total of 1003904 blocks. md: md10: sync done. md: syncing RAID array md1 md: minimum _guaranteed_ reconstruction speed: 1000 KB/sec/disc. md: using maximum available idle IO bandwidth (but not more than 50000 KB/sec) for reconstruction. md: using 128k window, over a total of 5004160 blocks. RAID1 conf printout: --- wd:2 rd:2 disk 0, wo:0, o:1, dev:sda5 disk 1, wo:0, o:1, dev:sdb5 NET: Registered protocol family 5 BuffaloSwPollingCheck> SW_POWER_ON XFS mounting filesystem sda6 Starting XFS recovery on filesystem: sda6 (logdev: internal) XFS: failed to read root inode md: md1: sync done. RAID1 conf printout: --- wd:2 rd:2 disk 0, wo:0, o:1, dev:sda2 disk 1, wo:0, o:1, dev:sdb2 XFS mounting filesystem sda6 Starting XFS recovery on filesystem: sda6 (logdev: internal) XFS: failed to read root inode
# time sudo xfs_repair -n /dev/sda6
time sudo xfs_repair -n /dev/sda6
Phase 1 - find and verify superblock...
Phase 2 - using internal log
- scan filesystem freespace and inode maps...
bad magic # 0x0 for agf 0
bad version # 0 for agf 0
bad length 0 for agf 0, should be 1048576
bad magic # 0x0 for agi 0
bad version # 0 for agi 0
bad length # 0 for agi 0, should be 1048576
would reset bad agf for ag 0
would reset bad agi for ag 0
bad uncorrected agheader 0, skipping ag...
root inode chunk not found
Phase 3 - for each AG...
- scan (but don't clear) agi unlinked lists...
error following ag 0 unlinked list
- process known inodes and perform inode discovery...
- agno = 0
bad magic number 0x0 on inode 128
bad version number 0x0 on inode 128
(...)
"bad directory block magic #" "for directory inode"
http://www.linuxquestions.org/questions/showthread.php?p=4395792&posted=1#post4395792# FeedBack http://www.lacie-nas.org/ http://thread.gmane.org/gmane.comp.file-systems.xfs.general/37969/
How to recover a raid0 array once accidently reformated by my nas ?
photorec finds some files…
but I want to avoid to tear out 1TB of junk (Disk /dev/md2: 984.0 GB, 984022908928 bytes )
Software :
sudo mdadm --examine --brief --scan dpkg -L ufsxsci && sudo /usr/bin/ufsxsci
Btw I packaged hxtools to deb that provides
http://dev.medozas.de/gitweb.cgi?p=hxtools;a=blob;f=sadmin/xfs_irecover.c;hb=HEAD
http://dev.medozas.de/gitweb.cgi?p=hxtools;a=history;f=sadmin/xfs_irecover.c;hb=HEAD
install it using apt
sudo apt-get install rzr hxtools devscripts apt-src valgrind libtool autoconf libhx-dev libcap-dev
ToDo :
http://article.gmane.org/gmane.comp.file-systems.xfs.general/27303/match=xfs_irecover
http://thread.gmane.org/gmane.comp.file-systems.xfs.general/33724/focus=33759
http://article.gmane.org/gmane.comp.file-systems.xfs.general/28475/match=xfs_irecover
sudo sudo mdadm --examine --brief --scan
dev=/dev/md2
dir=/tmp/$dev/xfs_irecover
sudo mkdir -p $dir
start=0
time sudo xfs_irecover -r $start -D $dev -o $dir
Filesystem claims to have 3843839488 inodes
Inode range 0--3843839488
ino 710455/3843839488 (0.02%) 35597/s ETA 29h:59m:22s recov 4934
ino 713777 is pretty large (size 787 MB), skipping.
ino 713778 is pretty large (size 743 MB), skipping.
# ino 1266970/3843839488 (0.03%) 46583/s ETA 22h:54m:48s recov 8136
ino 1267469/3843839488 (0.03%) 8680/s ETA 122h:58m:12s recov 8187
Segmentation fault
start=713777
start=1267469
max=10000000000
time sudo xfs_irecover -n -D $dev -o $dir -r $start -s $max
Inode range 1267469--3843839488
ino 1267469/3843839488 (0.03%) 1267469/s ETA 0h:50m:31s recov 0Segmentation fault
stop=3843839488
while [ $stop -ge $start ] ; do start=$(expr 1 + $start) && xfs_irecover -n -r $start -D /dev/md127 -o /mnt/sdc5/tmp/xfs_irecover/ ; done
strace ...
ioctl(6, FIONREAD, [16384]) = 0
read(6, "0,0] 62683:[0,0,0,0] 62684:[0,0,"..., 16384) = 16384
poll([{fd=6, events=POLLIN}], 1, -1) = 1 ([{fd=6, revents=POLLIN}])
ioctl(6, FIONREAD, [16384]) = 0
read(6, 0xb76c0008, 16384) = -1 EFAULT (Bad address)
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
Segmentation fault
ToDo : need to compile with debug (-O0 -ggdb3) and use valgrind. Granted, error checking is a bit short, and if xfs_db's interactive interface changed, I can imagine it fails somewhere.
ValGrind :
start=1267468 time sudo valgrind /usr/local/bin/xfs_irecover -D /dev/md2 -o $(pwd)/ ==10744== Memcheck, a memory error detector ==10744== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al. ==10744== Using Valgrind-3.6.0.SVN-Debian and LibVEX; rerun with -h for copyright info ==10744== Command: /usr/local/bin/xfs_irecover -D /dev/md2 -o /home/local/tmp/ ==10744== ==10744== Invalid read of size 1 ==10744== at 0x80493A0: main2 (xfs_irecover.c:427) ==10744== by 0x804A29D: main (xfs_irecover.c:569) ==10744== Address 0x43b564e is 0 bytes after a block of size 6 alloc'd ==10744== at 0x4025BD3: malloc (vg_replace_malloc.c:236) ==10744== by 0x404E737: HX_split (in /usr/lib/libHX.so.22.3.0) ==10744== by 0x80492E4: main2 (xfs_irecover.c:415) ==10744== by 0x804A29D: main (xfs_irecover.c:569) Filesystem claims to have 3843839488 inodes Inode range 0--3843839488 ino 709944/3843839488 (0.02%) 35082/s ETA 30h:25m:47s recov 4849 ino 713777 is pretty large (size 787 MB), skipping. ino 713778 is pretty large (size 743 MB), skipping. ino 1266732/3843839488 (0.03%) 15897/s ETA 67h:08m:36s recov 8090
xfsr-dirfind xfsr-dump xfsr-ls xfsr-rawsearch
sudo xfsr-dirfind /dev/md2
0x467dc8f7
hex=0x467dc8f7 # 1182648567
dec=$(printf "%llu\n" "$hex")
sudo xfsr-ls -A $dec -m /dev/md2 2>&1 | less
0x467e0ef7 .
0x52530601 ..
[ ERR] Invalid local
0x595d0501 ^V<FF>^B;::9
sudo xfsr-ls -A $(printf "%x" "$ad") -m /dev/md2 2>&1 | less
[ ERR] Not a valid inode (iadr=0x3218da9, ino=0x32190a9)