Hello Darryl,

On 2011-Jul-21, at 02:50, Darryl Miles wrote:

> 
> 
> Thanks for your reply.
> 
> 
> Landon Curt Noll wrote:
>> Here is what fdisk says about one of our cf drives:
>> 
>>      Disk /dev/sda: 16.4 GB, 16391208960 bytes
>>      255 heads, 63 sectors/track, 1992 cylinders
>>      Units = cylinders of 16065 * 512 = 8225280 bytes
>>      Sector size (logical/physical): 512 bytes / 512 bytes
>>      I/O size (minimum/optimal): 512 bytes / 512 bytes
>>      Disk identifier: 0x0003cd75
>> 
>> On that system the /boot partition is about 25 cylinders long.
>> 
>>      Device          Boot    Start   End             Blocks          Id      
>> System
>>      /dev/sda1       *               1               25              194560  
>>         83
>>      Linux Partition 1 does not end on cylinder boundary.
>>      /dev/sda2                       25              1993    15809537        
>> 5       Extended
>>      /dev/sda5                       1906    1993    700416          82      
>> Linux swap / Solaris
>>      /dev/sda6                       25              1906    15109120        
>> 83      Linux
>> 
> 
> I can do the same but need to make sure all the data is within that first 8Mb 
> then everything is fine.

We just tested a setup were we forced the data into the last cylinder ... 
nearly 200 MBytes from the start of the drive.
It does not work if the data is spread across the entire 16 GByte drive.  There 
is a "semi-magic" limit somewhere
between 200 MBytes and 16 GBytes for our setup.

We are not seeing an 8MByte limitation.  There may be a difference between CF 
cards where that matters.

chongo () /\oo/\

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