Invalid Boot-Record Signature

[yah]

Hi,valette.

  I have a 16M flash disk on my target board(MCP750).I create a ppcboot partition on it,and dd a ppc zImage on it,(dd if=/usr/local/zImage of=/dev/hda).Then, I boot from it,but fail. what's wrong?

PPC1-Bug>ioi
I/O Inquiry Status:
CLUN  DLUN  CNTRL-TYPE  DADDR  DTYPE  RM  Inquiry-Data
   1     0  PC8477      0      $00    Y   <None>
  14     0  PBC-EIDEF1  0      $00    N   HYPERSTO NE FLASH DISK    1/09
  14    40  PBC-EIDEF1  4      $00    N   ST310211 A                3.05
  14    50  PBC-EIDEF1  5      $05    Y   TOSHIBA  CD-ROM XM-6502B  1013
PPC1-Bug>pboot 14 0 1
Booting from: PBC-EIDEF1, Controller 14, Drive 0
Device Name : /pci at 80000000/pci1106,571 at b,1/harddisk at 0
Loading: Operating System

Invalid Boot-Record Signature
PPC1-Bug>



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