<p>The disk_read function reads sector(s) from the disk drive.</p>
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<pre>
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DRESULT disk_read (
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BYTE <em>Drive</em>, /* Physical drive number */
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BYTE* <em>Buffer</em>, /* Pointer to the read data buffer */
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DWORD <em>SectorNumber</em>, /* Start sector number */
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BYTE <em>SectorCount</em> /* Number of sectros to read */
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);
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</pre>
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</div>
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<div class="para">
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<h4>Parameters</h4>
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<dl class="par">
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<dt>Drive</dt>
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<dd>Specifies the physical drive number.</dd>
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<dt>Buffer</dt>
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<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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<dt>SectorNumber</dt>
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<dd>Specifies the start sector number in logical block address (LBA).</dd>
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<dt>SectorCount</dt>
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<dd>Specifies number of sectors to read. The value can be 1 to 255.</dd>
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</dl>
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</div>
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<div class="para">
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<h4>Return Value</h4>
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<dl class="ret">
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<dt>RES_OK (0)</dt>
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<dd>The function succeeded.</dd>
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<dt>RES_ERROR</dt>
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<dd>Any hard error occured during the read operation and could not recover it.</dd>
