(In reply to comment #1) > What do you see in the output from 'dmesg' when you get the I/O errors? Excerpt follows: NTFS-fs error (device hda2): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 56883180. attempt to access beyond end of device hda2: rw=0, want=56883182, limit=46877670 NTFS-fs error (device hda2): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 56883181. attempt to access beyond end of device hda2: rw=0, want=56883183, limit=46877670 NTFS-fs error (device hda2): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 56883182. attempt to access beyond end of device hda2: rw=0, want=56883184, limit=46877670 NTFS-fs error (device hda2): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 56883183. NTFS-fs error (device hda2): ntfs_readdir(): Reading index allocation data failed. 56883183*512 = 29124189696 46877670*512 = 24001367040 In my layman eyes, this seems to suggest that the resize operation didn't work as it should. (I assume it should move files in the part of the disk it removes from the shrunk partition...) It tries to read suff approx 29GB from the beginning (the original size was something like 29.7 or 29,9GB, and the new size was 24GB). > Did you run a filesystem check on the NTFS volume recently before resizing it? It certainly seemed ok in WinXP. I ran the std defragmenter before resizing. (Before that, the Ubuntu installer reported an all too big minimum size for the NTFS partition.) The installer syslog says: ... Mar 27 15:19:27 main-menu[3124]: (process:18257): parted Mar 27 15:19:27 main-menu[3124]: (process:18257): md-devices Mar 27 15:19:27 main-menu[3124]: (process:18257): grep: Mar 27 15:19:27 main-menu[3124]: (process:18257): /proc/mdstat Mar 27 15:19:27 main-menu[3124]: (process:18257): : No such file or directory Mar 27 15:19:27 main-menu[3124]: (process:18257): dump Mar 27 15:19:27 main-menu[3124]: (process:18257): lvm Mar 27 15:19:27 main-menu[3124]: (process:18257): File descriptor 3 left open Mar 27 15:19:27 main-menu[3124]: (process:18257): File descriptor 4 left open Mar 27 15:19:27 main-menu[3124]: (process:18257): File descriptor 5 left open Mar 27 15:19:27 main-menu[3124]: (process:18257): File descriptor 6 left open Mar 27 15:19:27 main-menu[3124]: (process:18257): Mar 27 15:19:27 main-menu[3124]: (process:18257): No volume groups found Mar 27 15:19:27 main-menu[3124]: (process:18257): Mar 27 15:19:27 main-menu[3124]: (process:18257): md Mar 27 15:19:27 main-menu[3124]: (process:18257): no_media Mar 27 15:19:27 main-menu[3124]: (process:18257): update_partitions Mar 27 15:19:27 main-menu[3124]: (process:18257): filesystems_detected Mar 27 15:19:27 main-menu[3124]: (process:18257): autouse_swap Mar 27 15:19:27 main-menu[3124]: (process:18257): backup Mar 27 15:19:27 main-menu[3124]: (process:18257): ntfsresize v1.9.4 Mar 27 15:19:27 main-menu[3124]: (process:18257): NTFS volume version: 3.1 Mar 27 15:19:27 main-menu[3124]: (process:18257): Cluster size : 4096 bytes Mar 27 15:19:27 main-menu[3124]: (process:18257): Current volume size: 29940015616 bytes (29941 MB) Mar 27 15:19:27 main-menu[3124]: (process:18257): Current device size: 29940019200 bytes (29941 MB) Mar 27 15:19:27 main-menu[3124]: (process:18257): New volume size : 23999996416 bytes (24000 MB) Mar 27 15:19:27 main-menu[3124]: (process:18257): Checking filesystem consistency ... Mar 27 15:19:27 main-menu[3124]: (process:18257): 0.00 percent completed^M Mar 27 15:19:27 main-menu[3124]: (process:18257): 0.08 percent completed^M ... Mar 27 15:19:41 main-menu[3124]: (process:18257): 99.95 percent completed^M Mar 27 15:19:41 main-menu[3124]: (process:18257): 100.00 percent completed Mar 27 15:19:41 main-menu[3124]: (process:18257): Accounting clusters ... Mar 27 15:19:41 main-menu[3124]: (process:18257): Space in use : 13955 MB (46.6%) Mar 27 15:19:41 main-menu[3124]: (process:18257): Collecting shrinkage constrains ... Mar 27 15:19:41 main-menu[3124]: (process:18257): Needed relocations : 185660 (761 MB) Mar 27 15:19:41 main-menu[3124]: (process:18257): Schedule chkdsk for NTFS consistency check at Windows boot time ... Mar 27 15:19:41 main-menu[3124]: (process:18257): Resetting $LogFile ... (this might take a while) Mar 27 15:19:41 main-menu[3124]: (process:18257): Relocating needed data ... Mar 27 15:19:41 main-menu[3124]: (process:18257): 0.05 percent completed^M Mar 27 15:19:41 main-menu[3124]: (process:18257): 0.11 percent completed^M ... Mar 27 15:22:27 main-menu[3124]: (process:18257): 99.05 percent complete Mar 27 15:22:34 udev[20941]: removing device node '/dev/ide/host0/bus0/target0/lun0/part1' Mar 27 15:22:34 udev[20961]: removing device node '/dev/ide/host0/bus0/target0/lun0/part2' Mar 27 15:22:34 udev[20981]: configured rule in '/etc/udev/rules.d/devfs.rules' at line 17 applied, added symlink '%k %c{2}' Mar 27 15:22:34 udev[20981]: configured rule in '/etc/udev/rules.d/devfs.rules' at line 17 applied, 'hda1' becomes '%c{1}' Mar 27 15:22:34 udev[20981]: creating device node '/dev/ide/host0/bus0/target0/lun0/part1' Mar 27 15:22:34 udev[21011]: configured rule in '/etc/udev/rules.d/devfs.rules' at line 17 applied, added symlink '%k %c{2}' Mar 27 15:22:34 udev[21011]: configured rule in '/etc/udev/rules.d/devfs.rules' at line 17 applied, 'hda2' becomes '%c{1}' Mar 27 15:22:34 udev[21011]: creating device node '/dev/ide/host0/bus0/target0/lun0/part2' Mar 27 15:22:35 main-menu[3124]: d^M Mar 27 15:22:35 main-menu[3124]: (process:18257): 99.11 percent completed^M ... Mar 27 15:22:35 main-menu[3124]: (process:18257): 100.00 percent completed Mar 27 15:22:35 main-menu[3124]: (process:18257): Updating $BadClust file ... Mar 27 15:22:35 main-menu[3124]: (process:18257): Updating $Bitmap file ... Mar 27 15:22:35 main-menu[3124]: (process:18257): Updating Boot record ... Mar 27 15:22:35 main-menu[3124]: (process:18257): Syncing device ... Mar 27 15:22:35 main-menu[3124]: (process:18257): Successfully resized NTFS on device '/dev/ide/host0/bus0/target0/lun0/part2'. Mar 27 15:22:35 main-menu[3124]: (process:18257): You can go on to shrink the device e.g. with 'fdisk'. Mar 27 15:22:35 main-menu[3124]: (process:18257): IMPORTANT: When recreating the partition, make sure you Mar 27 15:22:35 main-menu[3124]: (process:18257): 1) create it with the same starting disk cylinder Mar 27 15:22:35 main-menu[3124]: (process:18257): 2) create it with the same partition type (usually 7, HPFS/NTFS) Mar 27 15:22:35 main-menu[3124]: (process:18257): 3) do not make it smaller than the new NTFS filesystem size Mar 27 15:22:35 main-menu[3124]: (process:18257): 4) set the bootable flag for the partition if it existed before Mar 27 15:22:35 main-menu[3124]: (process:18257): Otherwise you may lose your data or can't boot your computer from the disk! Mar 27 15:22:35 main-menu[3124]: (process:18257): ntfsresize v1.9.4 Mar 27 15:22:35 main-menu[3124]: (process:18257): NTFS volume version: 3.1 Mar 27 15:22:35 main-menu[3124]: (process:18257): Cluster size : 4096 bytes Mar 27 15:22:35 main-menu[3124]: (process:18257): Current volume size: 23999996416 bytes (24000 MB) Mar 27 15:22:35 main-menu[3124]: (process:18257): Current device size: 24001367040 bytes (24002 MB) Mar 27 15:22:35 main-menu[3124]: (process:18257): New volume size : 24001360384 bytes (24002 MB) Mar 27 15:22:35 main-menu[3124]: (process:18257): Checking filesystem consistency ... Mar 27 15:22:35 main-menu[3124]: (process:18257): 0.00 percent completed^M ... Mar 27 15:22:53 main-menu[3124]: (process:18257): 99.95 percent completed^M Mar 27 15:22:53 main-menu[3124]: (process:18257): 100.00 percent completed Mar 27 15:22:53 main-menu[3124]: (process:18257): Accounting clusters ... Mar 27 15:22:53 main-menu[3124]: (process:18257): Space in use : 13955 MB (58.1%) Mar 27 15:22:53 main-menu[3124]: (process:18257): Collecting shrinkage constrains ... Mar 27 15:22:53 main-menu[3124]: (process:18257): WARNING: Every sanity check passed and only the DANGEROUS operations left. Mar 27 15:22:53 main-menu[3124]: (process:18257): Please make sure all your important data had been backed up in case of an Mar 27 15:22:53 main-menu[3124]: (process:18257): unexpected failure! Mar 27 15:22:53 main-menu[3124]: (process:18257): Are you sure you want to proceed (y/[n])? Schedule chkdsk for NTFS consistency check at Windows boot time ... Mar 27 15:22:53 main-menu[3124]: (process:18257): Resetting $LogFile ... (this might take a while) Mar 27 15:22:53 main-menu[3124]: (process:18257): Updating $BadClust file ... Mar 27 15:22:53 main-menu[3124]: (process:18257): Updating $Bitmap file ... Mar 27 15:22:53 main-menu[3124]: (process:18257): Updating Boot record ... Mar 27 15:22:53 main-menu[3124]: (process:18257): Syncing device ... Mar 27 15:22:53 main-menu[3124]: (process:18257): Successfully resized NTFS on device '/dev/ide/host0/bus0/target0/lun0/part2'. Mar 27 15:22:53 main-menu[3124]: (process:18257): grep: Mar 27 15:22:53 main-menu[3124]: (process:18257): /proc/mdstat Mar 27 15:22:53 main-menu[3124]: (process:18257): : No such file or directory Mar 27 15:22:53 main-menu[3124]: (process:182 Mar 27 15:51:53 udev[26908]: removing device node '/dev/ide/host0/bus0/target0/lun0/part1' Mar 27 15:51:53 udev[26928]: removing device node '/dev/ide/host0/bus0/target0/lun0/part2' Mar 27 15:51:53 udev[26948]: configured rule in '/etc/udev/rules.d/devfs.rules' at line 17 applied, added symlink '%k %c{2}' Mar 27 15:51:53 udev[26948]: configured rule in '/etc/udev/rules.d/devfs.rules' at line 17 applied, 'hda1' becomes '%c{1}' Mar 27 15:51:53 udev[26948]: creating device node '/dev/ide/host0/bus0/target0/lun0/part1' Mar 27 15:51:53 udev[26978]: configured rule in '/etc/udev/rules.d/devfs.rules' at line 17 applied, added symlink '%k %c{2}' Mar 27 15:51:53 udev[26978]: configured rule in '/etc/udev/rules.d/devfs.rules' at line 17 applied, 'hda2' becomes '%c{1}' Mar 27 15:51:53 udev[26978]: creating device node '/dev/ide/host0/bus0/target0/lun0/part2' Mar 27 15:51:53 udev[27008]: configured rule in '/etc/udev/rules.d/devfs.rules' at line 17 applied, added symlink '%k %c{2}' Mar 27 15:51:53 udev[27008]: configured rule in '/etc/udev/rules.d/devfs.rules' at line 17 applied, 'hda3' becomes '%c{1}' Mar 27 15:51:53 udev[27008]: creating device node '/dev/ide/host0/bus0/target0/lun0/part3' Mar 27 15:51:53 udev[27038]: configured rule in '/etc/udev/rules.d/devfs.rules' at line 17 applied, added symlink '%k %c{2}' Mar 27 15:51:53 udev[27038]: configured rule in '/etc/udev/rules.d/devfs.rules' at line 17 applied, 'hda4' becomes '%c{1}' Mar 27 15:51:53 udev[27038]: creating device node '/dev/ide/host0/bus0/target0/lun0/part4' Mar 27 15:52:05 main-menu[3124]: 57): File descriptor 3 left open Mar 27 15:52:05 main-menu[3124]: (process:18257): File descriptor 4 left open Mar 27 15:52:05 main-menu[3124]: (process:18257): File descriptor 5 left open Mar 27 15:52:05 main-menu[3124]: (process:18257): Mar 27 15:52:05 main-menu[3124]: (process:18257): No volume groups found Mar 27 15:52:05 main-menu[3124]: (process:18257): Mar 27 15:52:05 main-menu[3124]: (process:18257): swapon: Mar 27 15:52:05 main-menu[3124]: (process:18257): /dev/ide/host0/bus0/target0/lun0/part3 Mar 27 15:52:05 main-menu[3124]: (process:18257): : Device or resource busy