Pendings sectors, chkdsk and damage minimisation!

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H

hairyfox

Reputable
Mar 21, 2014
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0
4,510
Hi there,

After a lot of searching and googling I can't quite find an answer to this so hopefully someone will be able to help.

My Dell laptop has a habit of overheating occasionally and this has resulted in sudden power outages on a few occasions.

Recently, this happened while transferring some photos from my iphone to the computer using picasa. Now, a couple of my photos folders will open very sluggishly and the hard drive will effectively begin to 'hang', or appear to be at 100% usage, with the HDD light on solidly, while everything runs slowly. Only a forced reset or killing and restarting explorer.exe would return things to normalsih running. But this happens each time I open these folders so now I just avoid them and have backed up my photos elsewhere.

Speedfan SMART tool shows I have 14 'pending sectors' and I have plenty of available spare sectors. Chkdsk /f repaired a number of file system errors but I haven't carried out chkdsk /r.

Question is, what should I do about these bad sectors and how can I find out which files/folders they affect? Will chkdsk /r tell me this? What I want to do is repair the sectors (or similar) just to avoid the annoying hanging happening every time I go near some affected folders. I am fairly sure I have everything otherwise backed up, I just don't want to have to perpetually avoid these folders, or if certain programs need to go into them, have the problem rearing up again.

Also, will chkdsk /r recover data or tell me where it has put anything it has managed to recover/repair? And will chkdsk /r clear up the problem of the 100% HDD and hanging next time I go into the folder or will this happen every time anyway?

Any info would be great.

H
 
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Shaun o

Shaun o

Illustrious
Oct 7, 2007
6,113
1
41,960
Basically if you move a set of files from one folder or a part of the hard drive.
It will mark the sectors as free data for anything else to overwrite to it.

It`s called flagging.

When doing the move operation it maps the size of the data block to be moved, and the location of it on the disk structure. Source point Storage point.

Pending/ updating, just means it never completed the correction of the sector or block with updated information on how that part of the drive may be used in respect to writing or reading data to it. or moving data from a part of the drive to another that is mapped for storage.

The point where it is, at the start mapped on the drive, its size and it`s end point.



A file system error.

If you have backed up your files in a successful process.

Simply run a scan disk repair option to correct the error on the disk.

It will correct the location marker of the data where it is on the storage device, the chunk or sectors allocated for the data, and the end point of the location it is stored at.

 
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Shaun o

Shaun o

Illustrious
Oct 7, 2007
6,113
1
41,960
Because the flags or or data mapping is not correct.

Basically it knows where the start of the storage data is on the drive.
But it does not know where its end point is or the next bit of data to read is in sequence or order or size of the data chunk.

Reading data off a a drive can be sequential,l in order.
If the order or location of the mapped data is wrong it is why when accessing the data it is slow, it needs to know where to look next, to read chunks of data also that may be contained on the hard drive in random access locations.

As the data read and write heads need to know exactly where to move across to the right data storage point.

The best way to describe it is to think about a record on a record player.
The needle at the start of the song. if you pick it up and place it back down with in the same song the location has changed, the same song but with a different part of the song, but still the same sound track or data.

You know where on the record the part is you need or wish to skip to.
Hard drives work in the same way, only with data. they need to know the location of the next chunk of data the start and end point and where the read and write heads need to move to, much like picking up the needle on a record player on a record.

When the files system is damaged it simply does not know where to move to to play a part of the song for example or get the Data in its case the next location.

The answer is yes its why the hard drive crashes when trying to open a folder.
Or takes a very long time in reading data.



 
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