In order to fix my USB disk I need to delete some files but I can’t access it.
1) 500GB USB hard drive
2) I get Data error (cyclic redundancy check) when I attempt to access it from Windows 8, XP, DOS or Ubuntu
3) I’ve run chkdsk 3 times with these options:
* chkdsk j: /F /R /X /B
* chkdsk j: /offlinescanandfix
4) The final chkdsk test always reports:
* Correcting errors in the Master File Table (MFT) mirror.
* Correcting errors in the Volume Bitmap.
* Insufficient disk space to fix volume bitmap. CHKDSK aborted.
5) Chkdsk has successfully replaced about 100 bad clusters – the last chkdsk did not report any errors in the first 4 tests, just in the final test.
6) In Windows 8 Explorer the disk is visible but has no size info like my other disks. When I click on it I get the cyclic redundancy check
7) In Windows 8 Disk Management the disk appears as RAW Healthy (Active, Primary Partition) but I don’t think it’s RAW - chkdsk always reports NTFS
8) Apart from chkdsk the only other tool which seems to interact with the disk is hdhacker from portableapps.com – when I click “read sector from Disk” it reports:
* A disk read error occurred...NTLDR is missing...NTLDR is compressed...Press Ctrl+Alt+Del to restart
If there’s any way I can access the disk and delete files I guess I could then run chkdsk.