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Hard, floppy, CD-ROM - no difference.
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When performing direct disk I/O, you must seek, read, and write in multiples of sector sizes of the device and on sector boundaries. It seems that you don't, that's why you get this error. 
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When performing direct disk I/O, you must seek, read, and write in multiples of sector sizes of the device and on sector boundaries. It seems that you don't, that's why you get this error.

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Thanks, the problem was indeed the sector size, just like you mentioned.
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Thanks, the problem was indeed the sector size, just like you mentioned.

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I was wondering how I can read a sector of a hard disk. I was hoping I could do it with CreateFile('\\.\PhysicalDr<wbr />ive0',...)<wbr /> and then read the drive with ReadFile. But that doesn't work. CreateFile creates a handle ok, but ReadFile keeps me giving error 87 (wrong parameter). Anyone any ideas?<br />
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Kind regards,<br />
<br />
Djafken
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I was wondering how I can read a sector of a hard disk. I was hoping I could do it with CreateFile('\\.\PhysicalDrive0',...) and then read the drive with ReadFile. But that doesn't work. CreateFile creates a handle ok, but ReadFile keeps me giving error 87 (wrong parameter). Anyone any ideas?

Kind regards,

Djafken

reading disk sector in WinNT

Most development for the Microsoft platform is done utilizing the technologies supported by the.NET framework. Other development is done using Visual Basic for Applications (VBA) for programs like Access, Excel, Word and Outlook, with PowerShell for scripting, or with SQL for large databases.