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8 <title>FatFs - disk_read</title>
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15 <p>The disk_read function reads sector(s) from the disk drive.</p>
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18 BYTE <em>Drive</em>, /* Physical drive number */
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19 BYTE* <em>Buffer</em>, /* Pointer to the read data buffer */
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20 DWORD <em>SectorNumber</em>, /* Start sector number */
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21 BYTE <em>SectorCount</em> /* Number of sectros to read */
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30 <dd>Specifies the physical drive number.</dd>
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32 <dd>Pointer to the byte array to store the read data. The buffer size of number of bytes to be read, sector size * sector count, is required. The memory address specified by upper layer may or may not be aligned to word boundary.</dd>
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33 <dt>SectorNumber</dt>
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34 <dd>Specifies the start sector number in logical block address (LBA).</dd>
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35 <dt>SectorCount</dt>
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36 <dd>Specifies number of sectors to read. The value can be 1 to 255.</dd>
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42 <h4>Return Value</h4>
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45 <dd>The function succeeded.</dd>
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47 <dd>Any hard error occured during the read operation and could not recover it.</dd>
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49 <dd>Invalid parameter.</dd>
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51 <dd>The disk drive has not been initialized.</dd>
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56 <p class="foot"><a href="../00index_e.html">Return</a></p>
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