Hi Heinz and co,
I'm having a problem with a windows system that recently crashed. It has two 250GB WD SATA drives striped.
I've gotten dmraid to recognize and load the drives, and device-mapper is managing the file, but mounting the NTFS filesystem consistantly gives device already mounted error. The problem is a bad $MFT/$BITMAP. (See errors below)
Is there any way to recover this data, or is it hosed?
Thanks, david
localhost mapper # dmraid -cs isw_bidbgjihfe_RAID_Volume0
localhost mapper # dmraid -s -s -g *** Superset name : isw_bidbgjihfe size : 976562496 stride : 0 type : GROUP status : ok subsets: 1 devs : 2 spares : 0 --> Active Subset name : isw_bidbgjihfe_RAID_Volume0 size : 976561664 stride : 256 type : stripe status : ok subsets: 0 devs : 2 spares : 0
localhost mapper # dmsetup ls isw_bidbgjihfe_RAID_Volume0 (253, 0) isw_bidbgjihfe_RAID_Volume01 (253, 1) localhost mapper # fdisk /dev/mapper/isw_bidbgjihfe_RAID_Volume0
The number of cylinders for this disk is set to 60788. There is nothing wrong with that, but this is larger than 1024, and could in certain setups cause problems with: 1) software that runs at boot time (e.g., old versions of LILO) 2) booting and partitioning software from other OSs (e.g., DOS FDISK, OS/2 FDISK)
Command (m for help): p
Disk /dev/mapper/isw_bidbgjihfe_RAID_Volume0: 499.9 GB, 499999571968 bytes 255 heads, 63 sectors/track, 60788 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/mapper/isw_bidbgjihfe_RAID_Volume0p1 * 1 60787 488271546 7 HPFS/NTFS
Command (m for help): q
localhost mapper # mount -t ntfs -o ro /dev/mapper/isw_bidbgjihfe_RAID_Volume0 /mnt/windows/
mount: /dev/mapper/isw_bidbgjihfe_RAID_Volume0 already mounted or /mnt/windows/ busy
localhost mapper # uname -a
Linux localhost 2.6.11-gentoo-r4 #4 SMP Tue Mar 22 04:45:20 CST 2005 i686 Intel(R) Pentium(R) 4 CPU 3.40GHz GenuineIntel GNU/Linux
localhost mapper # dmesg | grep -i ntfs
NTFS driver 2.1.22 [Flags: R/W DEBUG MODULE].
NTFS-fs error (device dm-1): ntfs_read_locked_attr_inode(): First extent of attribute has non-zero lowest_vcn.
NTFS-fs error (device dm-1): ntfs_read_locked_attr_inode(): Failed with error code -5 while reading attribute inode (mft_no 0x0, type 0xb0, name_len 0). Marking corrupt inode and base inode 0x0 as bad. Run chkdsk.
NTFS-fs error (device dm-1): load_system_files(): Failed to load $MFT/$BITMAP attribute.
NTFS-fs error (device dm-1): ntfs_fill_super(): Failed to load system files.
-- David Parr Phone: 512-232-2632 david.parr@xxxxxxxxxxxxxxx Office: MBB 3.232 Institute for Cellular and Molecular Biology http://www.icmb.utexas.edu University of Texas at Austin http://www.utexas.edu
