A possible explanatation of the CRC ERROR bug.

      I have seen posted on this list a few comments about a CRC bug that
occurs while loading a new kernel / root into the bootloader. The only
answer to this bug that I have seen is that "eventually it works".

http://www.handhelds.org/pipermail/ipaq/2001-March/005278.html
http://www.handhelds.org/pipermail/ipaq/2001-April/006092.html
http://www.handhelds.org/pipermail/ipaq/2001-April/006099.html

are 3 examples of posts refering to this bug.

Last night I was hit by this bug. Many thanks to those on #ipaq,
#handhelds.org, #intimate and #familiar who gave suppport and advice.

Especially to nikos, who pointed me in the right direction.

There appears to be some kind of bug relating to prolonged flashing of
ipaqs. Quite possibly heat related. This also explains why longer flashes
have been a little hit and miss.

As an experiment I switched the ipaq off and reflashed the kernel and root.
No problems. Then I proceeded to use the ipaq for an hour and subsequently
reflashed it a further 4 times. The same kernel image was used each times,
and the md5sums have been verified. After the third flash, the system
failed to boot with crc errors.

at the bottom of this email i will paste a transcript of that failed boot.

Workaround:
The best workaround currently seems to be to rest the ipaq between flashes,
and to only flash when the ipaq has been off for a while.

Hope this helps.

Marc Rogers

----------------------------begin crc
error.log---------------------------------
boot> boot> boot
booting flash...
kernel_magic=E1A00000
kernel_region_words[9]=016F2818
Linux ELF flash_imgstart=50080000 size=000C0000 dest=C0000000 offset=00008000
MMU Control=C19F4071
copying Linux kernel ... done
linuxEntryPoint: C0008000
kernel_image_dest: C0000000
kernel_image_offset: 00008000
C0008000: E1A00000
C0008004: E1A00000
C0008008: E1A00000
C000800C: E1A00000
C0008010: E1A00000
C0008014: E1A00000
C0008018: E1A00000
C000801C: E1A00000
C0008020: EA000002
C0008024: 016F2818
root_filesystem_name=ramdisk
argc=00000002
args=noinitrd root=/dev/mtdblock/3 init=/linuxrc console=ttySA0
setting boot parameters
get_param: could not find parameter system_rev
Setting up Linux parameters at address=C0000100
using_ramdisk=00000001
initrd_start=346C7466
dram_size=04000000
nr_pages=00004000
command line is: noinitrd root=/dev/mtdblock/3 init=/linuxrc console=ttySA0
linuxEntryPoint=C0008000
Booting Linux image
Uncompressing Linux....................................................

crc error

  -- System halted
Received on Fri Jul 27 2001 - 23:33:52 EDT