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Re: [ts-7000] TS-7800 micro-SD card usage

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Subject: Re: [ts-7000] TS-7800 micro-SD card usage
From: Michael Schmidt <>
Date: Sun, 03 May 2009 16:42:46 -0700
wildpossumboy wrote:
>[...]
> Of course if I set Jumper 1 ON for booting the TS7800 on power-up does try to 
> boot from the micro-SD card but stops there. 
> But as I don't have any system or boot data on the card, the booting just 
> "hangs". 
> 
> The TS7800 manual says that the TS7800 will try to boot firstly from the 
> micro-SD card, then the standard SD card then on-board flash if it fails to 
> boot by other means. 
> That is my interruption of what is written in the Manual.
> 
> However, my experience testing over six TS7800 systems is: 
> They just hang awaiting micro-SD booting. 
> The micro-SD card I am using are ext2 formatted, but contains only 
> application information.

The boot logic has no way of knowing whether or not a valid kernel is on 
the card.  I was under the impression that if you don't have any 0xDA 
partitions it shouldn't try to boot anything, so if you want to leave 
the card in at boot just partition it without these - Jesse is this 
correct?  So basically if it sees something it thinks could be the 
kernel it will try to boot it.  If there is nothing in the slot, then it 
will skip to the next device.

> Can anyone suggest a known workaround or can offer another other option for 
> using micro-SD card in the way I wish to use it?
> 
> Thanks in advance.
> Cheers. Grahame.

  ______   Best Regards,
|__  __/                  Michael Schmidt
    ||                   Software Engineer
    ||echnologic Systems (EmbeddedARM.com)
    || (480)        16525 East Laser Drive
    |/ 837-5200   Fountain Hills, AZ 85268
        http://oz.embeddedarm.com/~michael


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