Check Disk Finds Bad Sector

[Guest someone]

I ran the check disk with auto correct of any errors, and one bad sector was

found, apparently in Microsoft Word. It was corrected. My question is how

does the computer correct the bad sector? Does it merely delete that sector

from the disk? XP Pro. Hard disk has 20 gb.

[Guest R. McCarty]

Re: Check Disk Finds Bad Sector

 

Every disk drive includes "Spare" clusters. When a cluster is marked

Bad it becomes remapped. So if Cluster 212 becomes bad it's data

is moved to say Cluster 2872 taking the place of cluster 212. Sort of

a simplistic explanation but conveys the idea.

 

"someone" <someone@somewhere.com> wrote in message

news:87B65708-DD62-4E79-B74B-952EB41B6103@microsoft.com...

>I ran the check disk with auto correct of any errors, and one bad sector

>was found, apparently in Microsoft Word. It was corrected. My question is

>how does the computer correct the bad sector? Does it merely delete that

>sector from the disk? XP Pro. Hard disk has 20 gb.

[Guest PD43]

Re: Check Disk Finds Bad Sector

 

"someone" <someone@somewhere.com> wrote:

>I ran the check disk with auto correct of any errors, and one bad sector was

>found, apparently in Microsoft Word. It was corrected. My question is how

>does the computer correct the bad sector? Does it merely delete that sector

>from the disk? XP Pro. Hard disk has 20 gb.

 

That's an OLD hard disk... and the bad sector is on the drive, not in

a file stored on the drive.

 

NORMALLY, the bad sector is "marked" by the system so that it won't be

written to.

 

Word of warning: once a bad sector appears, it's probable that more

will appear... maybe even soon.

 

Do yourself a favor, backup that drive and then find a replacement for

it ASAP.

[Guest Jim]

Re: Check Disk Finds Bad Sector

 

 

"someone" <someone@somewhere.com> wrote in message

news:87B65708-DD62-4E79-B74B-952EB41B6103@microsoft.com...

>I ran the check disk with auto correct of any errors, and one bad sector

>was found, apparently in Microsoft Word. It was corrected. My question is

>how does the computer correct the bad sector? Does it merely delete that

>sector from the disk? XP Pro. Hard disk has 20 gb.

Actually a part of MS Word is located in a bad sector.

How XP handles such a thing depends on how bad it really is. You see, the

drive

electronics declares a sector bad (most of the time) long before it is

completely

unreadable. In such a case, chkdsk may still be able to read the contents

of

the quetionable sector and move them elsewhere.

 

All drives contain spare sectors, but all of them have been used. The drive

electronics

replaces questionable sectors silently.

 

Your drive is not long for this world. You need to replace it while it is

nearly all still readable.

Jim

[Guest Twayne]

Re: Check Disk Finds Bad Sector

 

> "someone" <someone@somewhere.com> wrote in message

> news:87B65708-DD62-4E79-B74B-952EB41B6103@microsoft.com...

>> I ran the check disk with auto correct of any errors, and one bad

>> sector was found, apparently in Microsoft Word. It was corrected. My

>> question is how does the computer correct the bad sector? Does

>> it merely delete that sector from the disk? XP Pro. Hard disk has

>> 20 gb.

 

Chkdsk, when it is set to "fix" bad sectors, simply marks the sector/s

as "unusable" and doesn't write to them anymore; it skips them in the

future.

 

chkdsk -r is the best command to run to check disk health.

 

One bad sectore does NOT mean the disk is headed south. However if,

over time, MORE sectors are found to have gone bad, then it probably is

on it sway out and time to replace it. If the number of bad sectors

doesn't increase over time, then you can continue to use the drive; just

keep trak of the bad sectors now and then to see if they change.

> Actually a part of MS Word is located in a bad sector.

> How XP handles such a thing depends on how bad it really is. You

> see, the drive

> electronics declares a sector bad (most of the time) long before it is

> completely

> unreadable. In such a case, chkdsk may still be able to read the

> contents of

> the quetionable sector and move them elsewhere.

>

> All drives contain spare sectors, but all of them have been used. The

> drive electronics

> replaces questionable sectors silently.

>

> Your drive is not long for this world. You need to replace it while

> it is nearly all still readable.

> Jim

 

Not necessarily true, but it sure bears watching for awhile to see

what's happening. It might be years before anothe rsector goes bad.

I've had 4 bad sectors marked on an 80 Gig now for over two years. The

drive even passes the Mfr stress tests.

 

--

--

Regards,

 

Twayne

 

Open Office isn't just for wimps anymore;

OOo is a GREAT MS Office replacement

http://www.openoffice.org

[Guest Tony Meloche]

Re: Check Disk Finds Bad Sector

 

Twayne wrote:

>> "someone" <someone@somewhere.com> wrote in message

>> news:87B65708-DD62-4E79-B74B-952EB41B6103@microsoft.com...

>>> I ran the check disk with auto correct of any errors, and one bad

>>> sector was found, apparently in Microsoft Word. It was corrected. My

>>> question is how does the computer correct the bad sector? Does

>>> it merely delete that sector from the disk? XP Pro. Hard disk has

>>> 20 gb.

>

> Chkdsk, when it is set to "fix" bad sectors, simply marks the sector/s

> as "unusable" and doesn't write to them anymore; it skips them in the

> future.

>

> chkdsk -r is the best command to run to check disk health.

>

> One bad sectore does NOT mean the disk is headed south. However if,

> over time, MORE sectors are found to have gone bad, then it probably is

> on it sway out and time to replace it. If the number of bad sectors

> doesn't increase over time, then you can continue to use the drive; just

> keep trak of the bad sectors now and then to see if they change.

 

 

I've also read that EVERY disc has bad sectors from the factory, but

Chkdisk marks them initially and doesn't refer to them from that point

on - hence, any bad sector it show is a "new" bad sector. Is that true?

What you say about bad sectors is what a prof in a computer class also

told us once, though: Keep track for awhile to see if the number of bad

sectors is increasing - if not, don't worry about them.

 

Tony

 

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[Guest PD43]

Re: Check Disk Finds Bad Sector

 

Tony Meloche <labombarda@hollow.oak> wrote:

>I've also read that EVERY disc has bad sectors from the factory, but

>Chkdisk marks them initially and doesn't refer to them from that point

>on - hence, any bad sector it show is a "new" bad sector. Is that true?

 

Nope.

[Guest Twayne]

Re: Check Disk Finds Bad Sector

 

> Twayne wrote:

>>> "someone" <someone@somewhere.com> wrote in message

>>> news:87B65708-DD62-4E79-B74B-952EB41B6103@microsoft.com...

>>>> I ran the check disk with auto correct of any errors, and one bad

>>>> sector was found, apparently in Microsoft Word. It was corrected.

>>>> My question is how does the computer correct the bad sector? Does

>>>> it merely delete that sector from the disk? XP Pro. Hard disk has

>>>> 20 gb.

>>

>> Chkdsk, when it is set to "fix" bad sectors, simply marks the

>> sector/s as "unusable" and doesn't write to them anymore; it skips

>> them in the future.

>>

>> chkdsk -r is the best command to run to check disk health.

>>

>> One bad sectore does NOT mean the disk is headed south. However if,

>> over time, MORE sectors are found to have gone bad, then it probably

>> is on it sway out and time to replace it. If the number of bad

>> sectors doesn't increase over time, then you can continue to use the

>> drive; just keep trak of the bad sectors now and then to see if they

>> change.

>

>

> I've also read that EVERY disc has bad sectors from the factory, but

> Chkdisk marks them initially and doesn't refer to them from that point

> on - hence, any bad sector it show is a "new" bad sector. Is that

> true?

 

Yup.

 

Yes, it is true that, as delivered, today's drives have no bad sectors

visible, so any that show up are "new" bad sectors, at least in the

sense that you and I can access them.

 

Today's hard drives almost never have any bad sectors; that I know from

experience. Back in the "old days" drives used to come with a table of

the marked bad sectors in the drive, in fact; bad sectors were an

expected thing.

I've read the same things you have re factory-bad sectors and others

that claim that bad sectors just don't happen anymore with today's

advanced technology. I suppose the truth is a combination of the two

things somehow.

 

 

What you say about bad sectors is what a prof in a computer

> class also told us once, though: Keep track for awhile to see if the

> number of

> bad sectors is increasing - if not, don't worry about them.

 

Agreed.

 

--

Regards,

 

Twayne

 

Open Office isn't just for wimps anymore;

OOo is a GREAT MS Office replacement

http://www.openoffice.org

[Guest Tony Meloche]

Re: Check Disk Finds Bad Sector

 

Twayne wrote:

>> Twayne wrote:

>>>> "someone" <someone@somewhere.com> wrote in message

>>>> news:87B65708-DD62-4E79-B74B-952EB41B6103@microsoft.com...

>>>>> I ran the check disk with auto correct of any errors, and one bad

>>>>> sector was found, apparently in Microsoft Word. It was corrected.

>>>>> My question is how does the computer correct the bad sector? Does

>>>>> it merely delete that sector from the disk? XP Pro. Hard disk has

>>>>> 20 gb.

>>> Chkdsk, when it is set to "fix" bad sectors, simply marks the

>>> sector/s as "unusable" and doesn't write to them anymore; it skips

>>> them in the future.

>>>

>>> chkdsk -r is the best command to run to check disk health.

>>>

>>> One bad sectore does NOT mean the disk is headed south. However if,

>>> over time, MORE sectors are found to have gone bad, then it probably

>>> is on it sway out and time to replace it. If the number of bad

>>> sectors doesn't increase over time, then you can continue to use the

>>> drive; just keep trak of the bad sectors now and then to see if they

>>> change.

>>

>> I've also read that EVERY disc has bad sectors from the factory, but

>> Chkdisk marks them initially and doesn't refer to them from that point

>> on - hence, any bad sector it show is a "new" bad sector. Is that

>> true?

>

> Yup.

>

> Yes, it is true that, as delivered, today's drives have no bad sectors

> visible, so any that show up are "new" bad sectors, at least in the

> sense that you and I can access them.

>

> Today's hard drives almost never have any bad sectors; that I know from

> experience. Back in the "old days" drives used to come with a table of

> the marked bad sectors in the drive, in fact; bad sectors were an

> expected thing.

> I've read the same things you have re factory-bad sectors and others

> that claim that bad sectors just don't happen anymore with today's

> advanced technology. I suppose the truth is a combination of the two

> things somehow.

>

>

> What you say about bad sectors is what a prof in a computer

>> class also told us once, though: Keep track for awhile to see if the

>> number of

>> bad sectors is increasing - if not, don't worry about them.

>

> Agreed.

>

 

Very much appreciate the clear, concise and quick response Twayne.

 

Tony

 

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