should be restored from a backup. If you cannot isolate file problems, you might need to consider a
Low-Level (LL) format. This is an ideal solution because LL formatting
rewrites sector ID information, but the sophistication of today’s drives makes LL formatting almost impossible. If the drive manufacturer provides a drive preparation utility, you should backup the drive,
run the utility, FDISK, FORMAT, and restore the drive. Symptom 17-5. The hard drive was formatted accidentally A high-level format does not actually destroy data, but rather it clears the filenames and locations kept in the root directory and FAT—
this prevents DOS from finding those files. You will need to recover those files. Use a utility, such as UNFORMAT (with
PC Tools, which can reconstruct root directory and FAT data contained in a MIRROR file. This is not always a perfect process and you might not be able to recover all files. Symptom 17-6. A file has been deleted accidentally Mistyping or forgetting to add a drive specification can accidentally erase files from places you did not intend to erase. You can often recover those files if you act quickly. Use a utility, such as UNDELETE (with PC Tools and DOS, to restore the deleted file. This is not always a perfect process and you might not be able to recover every file. Symptom 17-7. The hard drive’s root directory is damaged A faulty root directory
can cripple the entire disk, rendering all sub-directories inaccessible. You might be able to recover the root directory structure. Use a utility, such as DISKFIX (with PC Tools, to reconstruct the damaged FATs and directories. If
you have been running MIRROR,
DISKFIX should be able to perform a very reliable recovery. You might also try other recovery
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