| Author |
Is OS going to scan the full device while detecting it?
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| Yukuan 2005-07-05, 2:46 am |
| Hi All,
I have a question about USB mass storage, such as flash pendrive.
Is OS going to scan its all logical blocks after detecting the pendrive
or
just to scan the FAT table in the meantime?
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| Maxim S. Shatskih 2005-07-05, 7:46 am |
| Even the FAT table is not 100% scanned on mount. Only the minimum necessary
is read on mount.
Use CHKDSK to scan the whole media.
--
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
maxim@storagecraft.com
http://www.storagecraft.com
"Yukuan" <yukuan.jiang@gmail.com> wrote in message
news:1120531105.684899.24410@o13g2000cwo.googlegroups.com...
> Hi All,
>
> I have a question about USB mass storage, such as flash pendrive.
> Is OS going to scan its all logical blocks after detecting the pendrive
> or
> just to scan the FAT table in the meantime?
>
| |
| Yukuan 2005-07-06, 7:46 am |
|
Please help me make a further confirmation:
An OS only scans necessary partial FAT while device mounting;
and do not scans/reads any other data.
Am I right?
Maxim S. Shatskih wrote:
> Even the FAT table is not 100% scanned on mount. Only the minimum necessary
> is read on mount.
>
> Use CHKDSK to scan the whole media.
>
| |
| Maxim S. Shatskih 2005-07-06, 5:47 pm |
| Yes. It scans the bootblock only in some cases. Well, for FAT32, the very
nearest file access will also scan the root directory cluster chain.
FASTFAT.SYS has no code to do any media surface checks on mount.
--
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
maxim@storagecraft.com
http://www.storagecraft.com
"Yukuan" <yukuan.jiang@gmail.com> wrote in message
news:1120655569.426492.119340@g47g2000cwa.googlegroups.com...
>
> Please help me make a further confirmation:
> An OS only scans necessary partial FAT while device mounting;
> and do not scans/reads any other data.
> Am I right?
>
> Maxim S. Shatskih wrote:
>
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| Yukuan 2005-07-07, 2:46 am |
|
Maxim S. Shatskih wrote:
> Yes. It scans the bootblock only in some cases. Well, for FAT32, the very
^^^^^^^^
> nearest file access will also scan the root directory cluster chain.
^^^^^^^^^^^^^^^^^^^
>
> FASTFAT.SYS has no code to do any media surface checks on mount.
Grateful to have you help me clear my doubt.
But I am still confused by the "very nearest file access".
What does it mean?
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| Maxim S. Shatskih 2005-07-07, 5:47 pm |
| > But I am still confused by the "very nearest file access".
First file access after mount.
--
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
maxim@storagecraft.com
http://www.storagecraft.com
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