Q: I have a question about drive utilities such as CHKDSK and other instruments such as utilities HDD manufacturer. I was wondering 9,775,031. CHKDSK is mark bad sectors and make sure the disk is not used when they again using the F-function.
2. Format.com is with the / Q-function to find bad sectors and mark them if they have them or you will do a simple format x: for her to do that.
3. The scan disk utility that comes with 9x machines actually “Mark bad sectors and ensures that no data is written to them again? Because I ran that utility (in DOS) on a disk, and it was apparently searching and “finding of bad sectors” which he claimed to have noticed and fixed, but when I again ran the utility, it was just as long and it showed that kept finding the same bad sectors.
4. Is wiping a drive with 0s then formatting / Fdisking the network to avoid any bad sectors on the disk? How does one drive bad sectors to avoid? Is the cumulative area will descend on the bad sectors to find? I heard they re-assigned to a certain point and when there are too many bad sectors (after hearing the drive usually does this automatically, by himself is) just give up, is this true?
Please, some one answered my question about drives, bad sectors, data recovery etc. No real site explains all this and Ive never really been able to figure this out.
The Bad Breath Report: The Quick & Easy Cure For Bad Breath!
Re:In my opinion, the diagnostic utility offered by the maker of your HD will do the best job of identifying those locations with weak magnetic read/write properties – simply because the makers' utility is optimized for head-sensitivity. They engineered the read/write head, thus they know it's particular sensitivity characteristics.
Analysis consists of reading the drive's storage-location table and then analyzing each storage location for acceptable read/write magnetic properties:
- Analyze data stored at each storage location.
- If weak magnetic properties are sensed, head-sensitivity is increased and the read is attempted again, for some number of iterations.
- If unable to read data at a weak location, that error is noted, and the storage-location table is modified to prevent future storage at that bad location.
- If able to read/recover data from a weak location, that data will be relocated to a known-good storage location, and the drive's storage-location table will be modified to prevent any future attempt to write to that bad location.
- When diagnostic completes, a report is issued to summarize if/what bad locations were found and success or failure of 'repairing' the bad location(s).
Hope this helps!
Pass Your Driving Test
Re:not sure, but I had a maxtor with bad sectors (suprise suprise) that was pulled from a box a couple years back. looking for a drive to pop into a linux box for my family for the /home partition. I had to fdisk (linux fdisk) it, reboot, dd if=/dev/zero of=/dev/hdd, reboot, fdisk (create the partion), mke2fs, reboot, fsck it, copy the current /home stuff to it, add a mount point (not home, yet) to fstab, reboot, make sure it was still up, then edit fstab to make it /home, mount /home and it was fine. Size appeared ok, and the first time I was working on it (fdisk to remove paritions) it was really slow. dd was somewhat slower then I thought it would be, but then it seemed just fine.
Bad Breath Killer
Re:1) To the best of my knowledge, the /f argument only checks the file structures. You need /r to check the drive surface.
2) The /q argument only creates file structures – that's how it finishes so quickly. It doesn't bother going over the entire disk.
3) Don't know. If I ever had a drive with bad sectors, I'd quicly either get a new one under warranty, or simply buy a new drive. New bad sectors are never a good thing.
4) Hard drives ship with some extra sectors set aside, so if a few extra bad sectors appear, the drive can invisibly reallocate the lost space to the extra pool. This may appear in the SMART readout as a Reallocation Event.
Once the extra space is full, chkdsk/scandisk will start yelling about bad sectors.
Now, all that is just what I've gathered over the years. It might not be 100% accurate, but it's all to the best of my understanding.
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