| Author |
Message |
Yukuan
Guest
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 Posted:
Tue Jul 05, 2005 7:38 am Post subject:
Is OS going to scan the full device while detecting it? |
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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
Guest
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| Posted:
Tue Jul 05, 2005 4:03 pm Post subject:
Re: Is OS going to scan the full device while detecting it? |
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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...
| Quote: | 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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|
| Back to top |
|
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Yukuan
Guest
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| Posted:
Wed Jul 06, 2005 4:16 pm Post subject:
Re: Is OS going to scan the full device while detecting it? |
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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:
| Quote: | 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.
|
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| Back to top |
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Maxim S. Shatskih
Guest
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| Posted:
Wed Jul 06, 2005 11:56 pm Post subject:
Re: Is OS going to scan the full device while detecting it? |
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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...
| Quote: |
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.
|
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| Back to top |
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Yukuan
Guest
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| Posted:
Thu Jul 07, 2005 7:29 am Post subject:
Re: Is OS going to scan the full device while detecting it? |
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Maxim S. Shatskih wrote:
| Quote: | Yes. It scans the bootblock only in some cases. Well, for FAT32, the very
|
^^^^^^^^
| Quote: | 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
Guest
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| Posted:
Thu Jul 07, 2005 10:33 pm Post subject:
Re: Is OS going to scan the full device while detecting it? |
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| Quote: | 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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