Some applications hung up, so I restarted computer. After restart, system
start ScanDisk to check hard drive for errors. In log file, there was some
info:

File system: There was one lost cluster. ScanDisk reclaimed the lost cluster
as free space.

Does this mean logical error, not physical damage of disk surface? Is it
safe for hard drive?
Does it possible find the damaged file and remove it?

How to make Thorough test without fixing anything?

Thanks,

Re: ScanDisk, lost cluster by David

David
Sun Mar 09 06:50:24 PDT 2008

From: "SANTANDER" <santander@microsoft.news>

| Some applications hung up, so I restarted computer. After restart, system
| start ScanDisk to check hard drive for errors. In log file, there was some
| info:
|
| File system: There was one lost cluster. ScanDisk reclaimed the lost cluster
| as free space.
|
| Does this mean logical error, not physical damage of disk surface? Is it
| safe for hard drive?
| Does it possible find the damaged file and remove it?
|
| How to make Thorough test without fixing anything?
|
| Thanks,

Go to the hard disk manufacturer's web site and download their diagnostic software
respective to your hard disk. After the test, you will know if the hard disk is bad or
not..

Quantum/Maxtor - PowerMax
http://www.maxtor.com/en/support/downloads/powermax.htm

Western Digital - Data LifeGuard Tools (DLGDiag)
http://support.wdc.com/download/

Hitachi/IBM - Drive Fitness Test (DFT)
http://www.hgst.com/hdd/support/download.htm

Seagate - SeaTools
http://www.seagate.com/support/seatools/

Fujitsu - Diagnostic Tool
http://www.fcpa.com/download/hard-drives/

Samsung - Disk manager
http://www.samsung.com/Products/HardDiskDrive/utilities/shdiag.htm


--
Dave
http://www.claymania.com/removal-trojan-adware.html
Multi-AV - http://www.pctipp.ch/downloads/dl/35905.asp



Re: ScanDisk, lost cluster by Don

Don
Sun Mar 09 06:43:20 PDT 2008

"SANTANDER" <santander@microsoft.news> wrote in message
news:ut3r$kegIHA.2448@TK2MSFTNGP03.phx.gbl...

> Some applications hung up, so I restarted computer. After restart, system
> start ScanDisk to check hard drive for errors. In log file, there was some
> info:
>
> File system: There was one lost cluster. ScanDisk reclaimed the lost
cluster
> as free space.
>
> Does this mean logical error, not physical damage of disk surface? Is it
> safe for hard drive?

This is normal and safe. Every cluster=logical sector of the
hard drive has an identifying number. The FAT (= File
Allocation Table = directory of contents) is a record of
filenames and the numbers of every sectors used by every file
(in sequence.) Your ScanDisk process discovered a single
logical sector (out of thousands) listed nowhere in the
FAT but not shown as "free space" -- therefore marked
it "free space" i.e. free to use. That is all.

> Does it possible find the damaged file and remove it?

No file is damaged and nothing need be "removed."

> How to make Thorough test without fixing anything?

Set appropriate check boxes on the ScanDisk main panel.

--
Don Phillipson
Carlsbad Springs
(Ottawa, Canada)



Re: ScanDisk, lost cluster by Gary

Gary
Sun Mar 09 08:09:36 PDT 2008


"SANTANDER" <santander@microsoft.news> wrote in message
news:ut3r$kegIHA.2448@TK2MSFTNGP03.phx.gbl...
> Some applications hung up, so I restarted computer. After restart, system
> start ScanDisk to check hard drive for errors. In log file, there was some
> info:
>
> File system: There was one lost cluster. ScanDisk reclaimed the lost
> cluster
> as free space.

The disk storage is logically divvied up into "clusters". Clusters typically
contain 2 to 64 KB or more of storage. Each cluster has an address. Logical
data is mapped to those physical storage addresses in the "File Allocation
Tables" (FATs). There is

> Does this mean logical error, not physical damage of disk surface? Is it
> safe for hard drive?

'Yes', 'no damage', and 'yes'.

> Does it possible find the damaged file and remove it?

The damage, if any, was already mostly cleaned up. This was the rest of
cleanup.

This error results from the FAT not being completely and accurately updated
during some past disk operation. If you get cross-linked files, for
instance, you usually get lost clusters, too. Or, if a crash left a
non-saved file that "almost disappeared", or otherwise interrupted a disk
operation. The garbage may have been around a while, too, and not from this
crash.

> How to make Thorough test without fixing anything?

Add the switch /checkonly.
Command-Line Parameters for the Scandisk Tool
http://support.microsoft.com/kb/199557

--
Gary S. Terhune
MS-MVP Shell/User
www.grystmill.com



Re: ScanDisk, lost cluster by SANTANDER

SANTANDER
Sun Mar 09 08:47:48 PDT 2008


"Don Phillipson" <e925@SPAMBLOCK.ncf.ca> wrote in message
news:u8ShN2egIHA.4196@TK2MSFTNGP04.phx.gbl...
> "SANTANDER" <santander@microsoft.news> wrote in message
> news:ut3r$kegIHA.2448@TK2MSFTNGP03.phx.gbl...
>
> > Some applications hung up, so I restarted computer. After restart,
system
> > start ScanDisk to check hard drive for errors. In log file, there was
some
> > info:
> >
> > File system: There was one lost cluster. ScanDisk reclaimed the lost
> cluster
> > as free space.
> >
> > Does this mean logical error, not physical damage of disk surface? Is it
> > safe for hard drive?
>
> This is normal and safe. Every cluster=logical sector of the
> hard drive has an identifying number. The FAT (= File
> Allocation Table = directory of contents) is a record of
> filenames and the numbers of every sectors used by every file
> (in sequence.) Your ScanDisk process discovered a single
> logical sector (out of thousands) listed nowhere in the
> FAT but not shown as "free space" -- therefore marked
> it "free space" i.e. free to use. That is all.
>
> > Does it possible find the damaged file and remove it?
>
> No file is damaged and nothing need be "removed."
>
> > How to make Thorough test without fixing anything?
>
> Set appropriate check boxes on the ScanDisk main panel.
>
> --
> Don Phillipson
> Carlsbad Springs
> (Ottawa, Canada)
---------

If do a ScanDisk Thorough test: there is an 'Options' tab, where is 2
checkboxes below: 'Do not perform write-testing', 'Do not repair bad sectors
in hidden and system files'. Should we check it? Will it better do test in
Safe Mode?

Thank you,
S.


Re: ScanDisk, lost cluster by Gary

Gary
Sun Mar 09 08:41:42 PDT 2008

"Gary S. Terhune" <none> wrote in message
news:et8NRefgIHA.4684@TK2MSFTNGP06.phx.gbl...
>
> "SANTANDER" <santander@microsoft.news> wrote in message
> news:ut3r$kegIHA.2448@TK2MSFTNGP03.phx.gbl...
>> Some applications hung up, so I restarted computer. After restart, system
>> start ScanDisk to check hard drive for errors. In log file, there was
>> some
>> info:
>>
>> File system: There was one lost cluster. ScanDisk reclaimed the lost
>> cluster
>> as free space.
>
> The disk storage is logically divvied up into "clusters". Clusters
> typically contain 2 to 64 KB or more of storage. Each cluster has an
> address. Logical data is mapped to those physical storage addresses in the
> "File Allocation Tables" (FATs). There is
>
>> Does this mean logical error, not physical damage of disk surface? Is it
>> safe for hard drive?
>
> 'Yes', 'no damage', and 'yes'.
>
>> Does it possible find the damaged file and remove it?
>
> The damage, if any, was already mostly cleaned up. This was the rest of
> cleanup.
>
> This error results from the FAT not being completely and accurately
> updated during some past disk operation. If you get cross-linked files,
> for instance, you usually get lost clusters, too. Or, if a crash left a
> non-saved file that "almost disappeared", or otherwise interrupted a disk
> operation. The garbage may have been around a while, too, and not from
> this crash.
>
>> How to make Thorough test without fixing anything?
>
> Add the switch /checkonly.
> Command-Line Parameters for the Scandisk Tool
> http://support.microsoft.com/kb/199557
>

Sorry, I thought you were asking about a command-line prompt. It's the only
way to do exactly what you asked to do.

SCANDISK /CHECKONLY /SURFACE

--
Gary S. Terhune
MS-MVP Shell/User
www.grystmill.com



Re: ScanDisk, lost cluster by Gary

Gary
Sun Mar 09 08:48:28 PDT 2008

"SANTANDER" <santander@microsoft.news> wrote in message
news:enRyUsfgIHA.5208@TK2MSFTNGP04.phx.gbl...
>
> "Don Phillipson" <e925@SPAMBLOCK.ncf.ca> wrote in message
> news:u8ShN2egIHA.4196@TK2MSFTNGP04.phx.gbl...
>> "SANTANDER" <santander@microsoft.news> wrote in message
>> news:ut3r$kegIHA.2448@TK2MSFTNGP03.phx.gbl...
>>
>> > Some applications hung up, so I restarted computer. After restart,
> system
>> > start ScanDisk to check hard drive for errors. In log file, there was
> some
>> > info:
>> >
>> > File system: There was one lost cluster. ScanDisk reclaimed the lost
>> cluster
>> > as free space.
>> >
>> > Does this mean logical error, not physical damage of disk surface? Is
>> > it
>> > safe for hard drive?
>>
>> This is normal and safe. Every cluster=logical sector of the
>> hard drive has an identifying number. The FAT (= File
>> Allocation Table = directory of contents) is a record of
>> filenames and the numbers of every sectors used by every file
>> (in sequence.) Your ScanDisk process discovered a single
>> logical sector (out of thousands) listed nowhere in the
>> FAT but not shown as "free space" -- therefore marked
>> it "free space" i.e. free to use. That is all.
>>
>> > Does it possible find the damaged file and remove it?
>>
>> No file is damaged and nothing need be "removed."
>>
>> > How to make Thorough test without fixing anything?
>>
>> Set appropriate check boxes on the ScanDisk main panel.
>>
>> --
>> Don Phillipson
>> Carlsbad Springs
>> (Ottawa, Canada)
> ---------
>
> If do a ScanDisk Thorough test: there is an 'Options' tab, where is 2
> checkboxes below: 'Do not perform write-testing', 'Do not repair bad
> sectors
> in hidden and system files'. Should we check it? Will it better do test in
> Safe Mode?

These are boxes for fairly sophisticated diagnosticians to use. 'Do not
perform write-testing' is much faster, but also only returns half the data
you're looking for. However, if you know enough to know you don't need the
missing half, who cares?

--
Gary S. Terhune
MS-MVP Shell/User
www.grystmill.com



Re: ScanDisk, lost cluster by mm

mm
Wed Mar 12 08:20:11 PDT 2008

On Sun, 9 Mar 2008 15:37:27 +0200, "SANTANDER"
<santander@microsoft.news> wrote:

>Some applications hung up, so I restarted computer. After restart, system
>start ScanDisk to check hard drive for errors. In log file, there was some
>info:
>
>File system: There was one lost cluster. ScanDisk reclaimed the lost cluster
>as free space.
>
>Does this mean logical error, not physical damage of disk surface? Is it
>safe for hard drive?
>Does it possible find the damaged file and remove it?
>
>How to make Thorough test without fixing anything?

I too wanted and still would like to run through all the testing
before fixing anything, but with time I've gotten a lot more
confidence in Scandisk, and drives are so large that I no longer want
to take the time to test without fixing.

8 or 10 or more years ago when I was having a lot of crashes and using
versions of Eudora email that didnt' do well in crashes, I had my
options set to not change lost clusters into free space, but to make
files out of them. Then I would use the List command** to look
quickly at all of the new files, and occasionally I would find whole
mailboxes that either were copies of mailboxes I still had, or in a 3
or 4 cases were THE mailbox, when it was missing from Eudora. In one
or more cases I was able to actually restore the mailbox, and in
others I was able to rename the file and keep my mail all in one
sequential file