hpfs recovery???

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1 total messages Started by Glen Herrmannsfeldt Sun, 14 Apr 1991 04:33

#2536

Author: Glen Herrmannsfeldt
Date: Sun, 14 Apr 1991 04:33

26 lines
1507 bytes

Apparently HPFS can dynamically mark bad blocks on the disk.
Mine has twice now decided that cyl 1 head 1 was bad.

No option of chkdsk has any idea what to do about it.  It actually
sets the flag on the block so that a hardware error occurs when
it is read.  Reformatting the track (low level) fixes it, but I
then have to reformat the partition.  (This is not the boot partition,
so the system still runs.)  

Is there any way to recover such a disk?  The unix fsck program 
can fix just about anything that can happen to a disk.  They
have spare superblocks in case the first gets destroyed.

It seems that chkdsk knows very little about recovering HPFS disks.

How can I avoid this in the future?  Can dynamic bad block marking
be turned off?  I do not believe it is actually bad.  I ran a low
level surface analysis program on just that track for a number of
passes without problem.

I really like HPFS, and want to keep using it, but it needs to be
reliable, and recoverable.

Thanks for any help related to this.

-- glen

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