使用xbdCreatePartition 初始化硬盘的问题

[jackydi]

500G的ATA硬盘，通过PCIe挂载到p2020子卡，系统是vxworks 6.9。
下面是两个日志，每个日志都很奇怪。

-> devs
drv name                
  0 /null               
  1 /tyCo/0             
  1 /tyCo/1             
  8 host:               
  3 /sd0:1              
  4 /sd0:2              
  4 /ata0:0       
  9 /vio                
  3 RAM:                
  5 stdio_pty_0x8ff0410.S
  6 stdio_pty_0x8ff0410.M
value = 26 = 0x1a
-> 
-> xbdCreatePartition "/ata0:0",4,25,25,25
Instantiating /ata0 as rawFs, device = 0x40001
Instantiating /ata0:4 as rawFs,  device = 0x90001
value = 0 = 0x0
-> devs
drv name                
  0 /null               
  1 /tyCo/0             
  1 /tyCo/1             
  8 host:               
  3 /sd0:1              
  4 /sd0:2              
  9 /vio                
  3 RAM:                
  5 stdio_pty_0x8ff0410.S
  6 stdio_pty_0x8ff0410.M
  4 /ata0:4             
value = 25 = 0x19
->  /* 这里的问题，为什么只有一个/ata0:4，难道是之前分过区，并且分区错误的原因吗？ */
-> dosFsVolFormat "/ata0:4",0
Formatting /ata0:4 for DOSFS
Instantiating /ata0:4 as rawFs, device = 0x60001
Formatting...Retrieved old volume params with %48 confidence:
Volume Parameters: FAT type: FAT32, sectors per cluster 0
  0 FAT copies, 0 clusters, 0 sectors per FAT
  Sectors reserved 0, hidden 0, FAT sectors 0
  Root dir entries 32, sysId (null)  , serial number a900000
  Label:"           " ...
Disk with 244192725 sectors of 512 bytes will be formatted with:
Volume Parameters: FAT type: FAT32, sectors per cluster 64
  2 FAT copies, 3814579 clusters, 29809 sectors per FAT
  Sectors reserved 32, hidden 0, FAT sectors 59618
  Root dir entries 0, sysId VX5DOS32, serial number a900000
  Label:"           " ...
OK.
value = 0 = 0x0
-> 
-> copy "/sd0:1/vxworks","/ata0:4/vx"
copy: error writing file. errno 0x  38001d
value = -1 = 0xffffffff

可以确定上面的分区操作是没有成功的，为什么这样呢？
需要说明的是，这块硬盘之前分过区，但是没有成功，然后在电脑上删除错误的分区后重新分区，又把所有的分区删除，然后重新挂载子卡上分区，就变成上面的错误了。


第二个日志：

-> devs
drv name                
  0 /null               
  1 /tyCo/0             
  1 /tyCo/1             
  8 host:               
  9 /vio                
  3 /sd0:1              
  4 /sd0:2              
  3 RAM:                
  4 /ata0:0             
  5 stdio_pty_0x1030b4f0.S
  6 stdio_pty_0x1030b4f0.M
value = 27 = 0x1b
-> xbdCreatePartition "/ata:0",1,0,0,0
value = -1 = 0xffffffff
-> xbdCreatePartition "/ata0:0",1,0,0,0
Instantiating /ata0 as rawFs, device = 0x60001
value = 0 = 0x0
-> dosFsVolFormat "/ata0:1",0x20,0
Formatting /ata0:1 for DOSFS
Instantiating /ata0:1 as rawFs, device = 0x90001
Formatting...Retrieved old volume params with %95 confidence:
Volume Parameters: FAT type: FAT32, sectors per cluster 64
  2 FAT copies, 0 clusters, 53699 sectors per FAT
  Sectors reserved 32, hidden 536870975, FAT sectors 107398
  Root dir entries 32, sysId (null)  , serial number 3ba90000
  Label:"           " ...
Disk with 439902194 sectors of 512 bytes will be formatted with:
Volume Parameters: FAT type: FAT32, sectors per cluster 64
  2 FAT copies, 6871793 clusters, 53699 sectors per FAT
  Sectors reserved 32, hidden 536870975, FAT sectors 107398
  Root dir entries 0, sysId VX5DOS32, serial number 3ba90000
  Label:"           " ...
OK.
value = 0 = 0x0
-> 
-> 
-> dosFsShow "/ata0:1"

volume descriptor ptr (pVolDesc):    0xf104280
XBD device block I/O handle: 0x90001
auto disk check on mount:      NOT ENABLED
volume write mode:         copyback (DOS_WRITE)
volume options:      
max # of simultaneously open files:    26
file descriptors in use:       0
# of different files in use:       0
# of descriptors for deleted files:    0
# of  obsolete descriptors:        0

current volume configuration:
 - volume label:    NO LABEL ; (in boot sector:   )
 - volume Id:       3ba90000
 - total number of sectors:   439,902,194
 - bytes per sector:     512
 - # of sectors per cluster: 64
 - # of reserved sectors:    32
 - FAT entry size:      FAT32
 - # of sectors per FAT copy:    53,699
 - # of FAT table copies:   2
 - # of hidden sectors:      63
 - first cluster is in sector #  107,430
 - Update last access date for open-read-close = FALSE
 - directory structure:         VFAT
 - file name format:            8-bit (extended-ASCII)
 - root dir start cluster:      2

FAT handler information:
------------------------
 - allocation group size:     688 clusters
 - free space on volume:      112,587,440,102 bytes
value = 0 = 0x0

分区只有110G，硬盘实际是500G的，这是怎么回事？VxWorks的FAT32分区不能支持太大的分区容量吗？