I can take a look at your partition, if you can provide me root access to your machine. Also it is not for free. If you are OK with this, then send me a private message. Thanks, Edward. James wrote:
First off, I would like to apologize if this is the incorrect place to post this question -- it seems Namesys is gone so I can't pay for support to have someone help me out with this issue. My friend threw a theory out there -- maybe the beginning of the partition is incorrect on the drive? The drive originally had an NTFS partition. By blowing away the beginning of the drive and then rewriting the partition table, maybe the kernel was using the original "beginning" location of the NTFS partition which *may* be incorrect for the beginning of the reiserfs /dev/sdX1 partition. I did *NOT* reboot after making changes to the partition table (nor did I disconnect / reconnect the drive). Is this possible? I'm 99.99999% sure this drive is not defective. There has to be some way to mount this partition as it was cleanly unmounted and the data copied over with no issues when I was originally doing it. Isn't there a way to search for a superblock on the drive and then use that when attempting to mount the partition? -james On Tue, Aug 24, 2010 at 12:37 PM, James <jtp@xxxxxxxxx> wrote:All, I'm in desperate need of some help recovering a reiserfs partition that went awry for some unknown reason. A quick list of events: - purchased brand new WD "My Passport" drive -- 320GB, 2.5GB - cleared partition table with a "dd if=/dev/urandom of=/dev/sdX bs=5M count=10" - created one single large partition - mkreiserfs /dev/sdX1 - copied data into the new hard drive All seemed well. I mounted the partition, copied critical data into the partition, then *cleanly* unmounted the partition after confirming that all the data was on the drive with no issues. Then "it the the fan": Upon attempting to remount the partition, the partition would not mount. In fact, upon attempting to remount the partition, here's what happens (according to /var/log/dmesg): -->8-- [18723.893570] usb-storage: device found at 8 [18723.893572] usb-storage: waiting for device to settle before scanning [18728.893199] usb-storage: device scan complete [18728.895310] scsi 13:0:0:0: Direct-Access WD My Passport 071A 2011 PQ: 0 ANSI: 4 [18728.897305] scsi 13:0:0:1: Enclosure WD SES Device 2011 PQ: 0 ANSI: 4 [18728.898987] sd 13:0:0:0: Attached scsi generic sg4 type 0 [18728.899119] ses 13:0:0:1: Attached Enclosure device [18728.899222] ses 13:0:0:1: Attached scsi generic sg5 type 13 [18728.901909] sd 13:0:0:0: [sdf] 625086464 512-byte logical blocks: (320 GB/298 GiB) [18728.905166] sd 13:0:0:0: [sdf] Write Protect is off [18728.905170] sd 13:0:0:0: [sdf] Mode Sense: 2b 00 10 08 [18728.905173] sd 13:0:0:0: [sdf] Assuming drive cache: write through [18728.910673] sd 13:0:0:0: [sdf] Assuming drive cache: write through [18728.910677] sdf: sdf1 [18728.954536] sd 13:0:0:0: [sdf] Assuming drive cache: write through [18728.954541] sd 13:0:0:0: [sdf] Attached SCSI disk [18729.204285] REISERFS (device sdf1): found reiserfs format "3.6" with standard journal [18729.204305] REISERFS (device sdf1): using ordered data mode [18729.233424] REISERFS (device sdf1): journal params: device sdf1, size 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30 [18729.233645] REISERFS (device sdf1): checking transaction log (sdf1) [18730.204418] REISERFS warning: reiserfs-5090 is_tree_node: node level 5687 does not match to the expected one 65534 [18730.204422] REISERFS error (device sdf1): vs-5150 search_by_key: invalid format found in block 0. Fsck? [18730.204426] REISERFS (device sdf1): Remounting filesystem read-only [18730.204430] REISERFS error (device sdf1): vs-13070 reiserfs_read_locked_inode: i/o failure occurred trying to find stat data of [1 2 0x0 SD] [18730.204436] REISERFS (device sdf1): Using r5 hash to sort names root@gentoo:~# fdisk -l /dev/sdf Disk /dev/sdf: 320.0 GB, 320044269568 bytes 255 heads, 63 sectors/track, 38909 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x2dbafd11 Device Boot Start End Blocks Id System /dev/sdf1 1 38909 312536511 83 Linux --8<-- I know the data is in tact because (a) I have not written anything to the disk, and (b) using tools like foremost / scalpel have successfully "restored" much of the data on the drive. (unfortunately foremost does not restore file names and it'll be incredibly difficult for me to properly restore the previous data structure) I've attempted to recover the drive using "reiserfsck --scan-whole-partition --rebuild-tree /dev/sdf1", to no avail: -->8-- root@gentoo:~# reiserfsck --scan-whole-partition --rebuild-tree /dev/sdf1 reiserfsck 3.6.21 (2009 www.namesys.com) *snip* Will rebuild the filesystem (/dev/sdf1) tree Will put log info to 'stdout' Do you want to run this program?[N/Yes] (note need to type Yes if you do):Yes Replaying journal: No transactions found ########### reiserfsck --rebuild-tree started at Tue Aug 24 01:46:49 2010 ########### Pass 0: ####### Pass 0 ####### The whole partition (78134112 blocks) is to be scanned Skipping 10595 blocks (super block, journal, bitmaps) 78123517 blocks will be read 0%....20%....40%... left 0, 8521 /seccsecccccseccccc Could not find a hash in use. Using "r5" "r5" hash is selected Flushing..finished Read blocks (but not data blocks) 78123517 Leaves among those 0 Objectids found 2 Pass 1 (will try to insert 0 leaves): ####### Pass 1 ####### Looking for allocable blocks .. finished Flushing..finished 0 leaves read 0 inserted ####### Pass 2 ####### Flushing..finished No reiserfs metadata found. If you are sure that you had the reiserfs on this partition, then the start of the partition might be changed or all data were wiped out. The start of the partition may get changed by a partitioner if you have used one. Then you probably rebuilt the superblock as there was no one. Zero the block at 64K offset from the start of the partition (a new super block you have just built) and try to move the start of the partition a few cylinders aside and check if debugreiserfs /dev/xxx detects a reiserfs super block. If it does this is likely to be the right super block version. If this makes you nervous, try www.namesys.com/support.html, and for $25 the author of fsck, or a colleague if he is out, will step you through it all. Aborted (core dumped) --8<-- The issue seems to be the *superblock* is not correct. I confirmed with a "reiserfsck --check /dev/sdf1" -->8-- root@gentoo:~# reiserfsck --check /dev/sdf1 reiserfsck 3.6.21 (2009 www.namesys.com) *snip* Will read-only check consistency of the filesystem on /dev/sdf1 Will put log info to 'stdout' Do you want to run this program?[N/Yes] (note need to type Yes if you do):Yes ########### reiserfsck --check started at Tue Aug 24 04:48:00 2010 ########### Replaying journal: No transactions found Checking internal tree.. Bad root block 0. (--rebuild-tree did not complete) Aborted (core dumped) --8<-- I've also attempted to rebuild the superblock (which seems to be the big problem here), but this didn't work either. -->8-- root@gentoo:~# reiserfsck --rebuild-sb /dev/sdf1 reiserfsck 3.6.21 (2009 www.namesys.com) *snip* Will check superblock and rebuild it if needed Will put log info to 'stdout' Do you want to run this program?[N/Yes] (note need to type Yes if you do):Yes rebuild-sb: wrong tree height occured (65535), zeroed Reiserfs super block in block 16 on 0x851 of format 3.6 with standard journal Count of blocks on the device: 78134112 Number of bitmaps: 2385 Blocksize: 4096 Free blocks (count of blocks - used [journal, bitmaps, data, reserved] blocks): 78134112 Root block: 0 Filesystem is NOT clean Tree height: 0 Hash function used to sort names: "r5" Objectid map size 2, max 972 Journal parameters: Device [0x0] Magic [0x0] Size 8193 blocks (including 1 for journal header) (first block 18) Max transaction length 1024 blocks Max batch size 900 blocks Max commit age 30 Blocks reserved by journal: 0 Fs state field: 0xfa03: FATAL corruptions exist. some corruptions exist. sb_version: 2 inode generation number: 0 UUID: 1704f9d1-2de0-40f7-8f73-aa3cbd6b35ba LABEL: Set flags in SB: Mount count: 0 Maximum mount count: Disabled. Run fsck.reiserfs(8) or use tunefs.reiserfs(8) to enable. Last fsck run: Never with a version that supports this feature. Check interval in days: Disabled. Run fsck.reiserfs(8) or use tunefs.reiserfs(8) to enable. Is this ok ? (y/n)[n]: y The fs may still be unconsistent. Run reiserfsck --check. --8<-- I apologize of the long post; I'm in a pretty big pickle and am desperate for some help. The data is on the drive -- what bothers me is that this randomly happened. The portable drive was cleanly unmounted so I can't really see what could have caused this issue. Any thoughts, ideas, or beer to get over this issue would be greatly appreciated. Thanks! -james-- To unsubscribe from this list: send the line "unsubscribe reiserfs-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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