unas 升级pmon后发现 usb 不能挂在 求教下

pmon用tftp升级的 升级前识别usb0

ext3 用mkfs.ext3 -T small /dev/sdb1   fat32 fat16 ext3都格式化过了 还是不显示如下 :

升级的版本为http://www.bjlx.org.cn/node/841  这个版本。

手头上有编程器 可以自己写 32dip 或 56脚的flash
 
请求帮助下如何刷成带usb版本的
PMON> env
  ifconfig = rtk0:192.168.1.21
        al = /dev/ram@bc000000
      karg = "root=/dev/sda1 hda=noprobe hdb=noprobe"
  machtype = lemote-nas-2f
   ethaddr = ff:ff:ff:ff:ff:ff
   memsize = 256
highmemsize = 768
  cpuclock = 800020000
  busclock = 66000000
   systype = Bonito
    brkcmd = "l -r @cpc 1"
  datasize = -b          [-b -h -w -d]
    dlecho = off         [off on lfeed]
   dlproto = none        [none XonXoff EtxAck]
     bootp = no          [no sec pri save]
  hostport = tty0
   inalpha = hex         [hex symbol]
    inbase = 16          [auto 8 10 16]
    moresz = 10
    prompt = "PMON> "
  regstyle = sw          [hw sw]
   regsize = 32          [32 64]
    rptcmd = trace       [off on trace]
   trabort = ^K
      ulcr = cr          [cr lf crlf]
     uleof = %
   showsym = yes         [no yes]
     fpfmt = both        [both double single none]
     fpdis = yes         [no yes]
   Version = LM-NAS-1.2.1
mips_szptr = 32
 BuildTime = "Nov 14 2010 17:58:49"
rtk0.ipaddr = 192.168.1.21
PMON> devls -all
devls: illegal option -- l
PMON> devls -a
Device name  Type
mainbus0     DULL
localbus0    DULL
pcibr0       DULL
pci0         DULL
rtk0         IFNET
rtk1         IFNET
sil0         DULL
ohci0        DULL
PMON> usb info
1(0): Hub,  USB Revision 1.10
 -  OHCI Root Hub
 - Class: Hub
 - PacketSize: 8  Configurations: 1
 - Vendor: 0x0000  Product 0x0000 Version 0.0
   Configuration: 1
   - Interfaces: 1 Self Powered 0mA
     Interface: 0
     - Alternate Settings 0, Endpoints: 1
     - Class Hub
     - Endpoint 1 In Interrupt MaxPacket 2 Interval 255ms

2(0): Mass Storage,  USB Revision 2.0
 - hyundai Mass Storage C41D01F3
 - Class: (from Interface) Mass Storage
 - PacketSize: 64  Configurations: 1
 - Vendor: 0x058f  Product 0x6387 Version 1.67
   Configuration: 1
   - Interfaces: 1 Bus Powered 100mA
     Interface: 0
     - Alternate Settings 0, Endpoints: 2
     - Class Mass Storage, Transp. SCSI, Bulk only
     - Endpoint 1 Out Bulk MaxPacket 64
     - Endpoint 2 In Bulk MaxPacket 64

PMON> usb free
Generic usb commands, type usb help for all usage