FatFs - f

f_fdisk

The f_fdisk fucntion divides a physical drive.

-FRESULT f_fdisk (
-  BYTE  pdrv,         /* [IN] Physical drive number */
-  const DWORD part[], /* [IN] Partition size */
-  void* work          /* [IN] Work area */
-);
-

Parameters

pdrv: Specifies the physical drive to be divided.
part[]: Partition map table. It must have four items.
work: Pointer to the function work area. The size must be at least _MAX_SS bytes.

Return Values

-FR_OK, -FR_DISK_ERR, -FR_NOT_READY, -FR_WRITE_PROTECTED, -FR_INVALID_PARAMETER -

Description

The f_fdisk() function creates a partition table into the MBR of the physical drive. The partitioning rule is in generic FDISK format, so that it can create upto four primary partitions. Logical volumes in the extended partition is not supported. The part[] with four items specifies how to divide the physical drive. The first item specifies the size of first primary partition and fourth item specifies the fourth primary partition. If the value is less than or equal to 100, it specifies percentage of the partition in the entire disk space. If it is larger than 100, it specifies the partition size in unit of sector.

QuickInfo

Available when _FS_READOLNY == 0, _USE_MKFS == 1 and _MULTI_PARTITION == 1.

Example

-    /* Volume management table defined by user (required when _MULTI_PARTITION == 1) */
-
-    PARTITION VolToPart[] = {
-        {0, 1},    /* Logical drive 0 ==> Physical drive 0, 1st partition */
-        {0, 2},    /* Logical drive 1 ==> Physical drive 0, 2nd partition */
-        {1, 0}     /* Logical drive 2 ==> Physical drive 1, auto detection */
-    };
-

-    /* Initialize a brand-new disk drive mapped to physical drive 0 */
-
-    FATFS fs;
-    DWORD plist[] = {50, 50, 0, 0};  /* Divide drive into two partitions */
-    BYTE work[_MAX_SS];
-
-    f_fdisk(0, plist, work);    /* Divide physical drive 0 */
-
-    f_mount(&fs, "0:", 0);      /* Register work area to the logical drive 0 */
-    f_mkfs("0:", 0, 0);         /* Create FAT volume on the logical drive 0. 2nd argument is ignored. */
-    f_mount(0, "0:", 0);        /* Unregister work area from the logical drive 0 */
-
-    f_mount(&fs, "1:", 0);      /* Register a work area to the logical drive 1 */
-    f_mkfs("1:", 0, 0);         /* Create FAT volume on the logical drive 1. 2nd argument is ignored. */
-    f_mount(0, "1:", 0);        /* Unregister work area from the logical drive 1 */
-
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