diff --git a/build/libraries/devices/sdmc/ARM7/drnand.c b/build/libraries/devices/sdmc/ARM7/drnand.c
index 753274d..a64d652 100644
--- a/build/libraries/devices/sdmc/ARM7/drnand.c
+++ b/build/libraries/devices/sdmc/ARM7/drnand.c
@@ -63,7 +63,7 @@ static int     nand_calculated_fat_params = 0;
  *---------------------------------------------------------------------------*/
 static void sdi_get_CHS_params( void);
 static u32  sdi_get_ceil( u32 cval, u32 mval);
-static void sdi_get_nom( u16 min_nom);
+static void sdi_get_nom( u32 min_nom);
 static void sdi_get_fatparams( void);
 static void sdi_build_partition_table( void);
 
@@ -77,13 +77,13 @@ u32 NAND_FAT1_SECTORS;
 u32 NAND_FAT2_SECTORS;
 u32 NAND_FAT3_SECTORS;
 
-void nandSetFormatRequest( u16 partition_num, u16* partition_mbytes)
+void nandSetFormatRequest( u16 partition_num, u32* partition_sectors)
 {
-    NAND_RAW_SECTORS  = (partition_mbytes[0] * 1024 * 1024) / 512;
-    NAND_FAT0_SECTORS = ((partition_mbytes[1] * 1024 * 1024) / 512) + NAND_RAW_SECTORS;
-    NAND_FAT1_SECTORS = (partition_mbytes[2] * 1024 * 1024) / 512;
-    NAND_FAT2_SECTORS = (partition_mbytes[3] * 1024 * 1024) / 512;
-    NAND_FAT3_SECTORS = (partition_mbytes[4] * 1024 * 1024) / 512;
+    NAND_RAW_SECTORS  = partition_sectors[0];
+    NAND_FAT0_SECTORS = partition_sectors[1] + NAND_RAW_SECTORS;
+    NAND_FAT1_SECTORS = partition_sectors[2];
+    NAND_FAT2_SECTORS = partition_sectors[3];
+    NAND_FAT3_SECTORS = partition_sectors[4];
     NAND_FAT_PARTITION_COUNT = partition_num;
 }
 
@@ -527,7 +527,7 @@ static u32 sdi_get_ceil( u32 cval, u32 mval)
 
 
 /*マスターブートセクタのセクタ数を返す*/
-static void sdi_get_nom( u16 MIN_NOM)
+static void sdi_get_nom( u32 MIN_NOM)
 {
     u32 RSC[4];
     u32 TS[4];
diff --git a/build/tests/fatfs/nand_formatter_kmc/ARM7/src/main.c b/build/tests/fatfs/nand_formatter_kmc/ARM7/src/main.c
index b3bdb6d..9095fe2 100644
--- a/build/tests/fatfs/nand_formatter_kmc/ARM7/src/main.c
+++ b/build/tests/fatfs/nand_formatter_kmc/ARM7/src/main.c
@@ -28,7 +28,7 @@
 
 
 
-extern void nandSetFormatRequest( u16 partition_num, u16* partition_mbytes);
+extern void nandSetFormatRequest( u16 partition_num, u32* partition_sectors);
 
 
 /*---------------------------------------------------------------------------*
@@ -138,7 +138,7 @@ void TwlSpMain(void)
     byte TEST_FILENAME[] = "\\nand_p0_test.bin";
     byte VOLUME_LABEL[]  = "F:";
     u16 nand_fat_partition_num; //FATパーティション数
-    u16 partition_MB_size[5];   //パーティション毎の容量
+    u32 partition_MB_size[5];   //パーティション毎の容量
     /**/
     u32 block_buf[512/4];
     u32 arm9_ofs, arm9_size, arm7_ofs, arm7_size;
@@ -236,9 +236,9 @@ void TwlSpMain(void)
         }
         nand_fat_partition_num++;
   
-        DBG_PRINTF( "FAT PARTITION 3 SIZE?(MBytes) -> ");
-        partition_MB_size[INDEX_FAT3_PARTITION] = get_number_prompt();
-        DBG_PRINTF( "  (%d MBytes)\n\n", partition_MB_size[INDEX_FAT3_PARTITION]);
+//        DBG_PRINTF( "FAT PARTITION 3 SIZE?(MBytes) -> ");
+//        partition_MB_size[INDEX_FAT3_PARTITION] = get_number_prompt();
+//        DBG_PRINTF( "  (%d MBytes)\n\n", partition_MB_size[INDEX_FAT3_PARTITION]);
         break;
     }
 #endif
@@ -304,8 +304,13 @@ NAND_FLASH_FORMAT_START:
     /*--------------------*/
 
 
-    /*パーティション構成をライブラリに要求*/
+    /*--- パーティション構成をセクタ単位にしてライブラリに要求 ---*/
+    for( i=0; i<4; i++) {
+        partition_MB_size[i] *= ((1024 * 1024) / 512);
+        PRINTDEBUG( "p%d : %d\n", i, partition_MB_size[i]);
+    }
     nandSetFormatRequest( nand_fat_partition_num, partition_MB_size);
+    /*------------------------------------------------------------*/
 
     /*マウント*/
     if( nandRtfsAttach( 5, 0) == FALSE) {  //nandパーティション0をFドライブにする