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

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Subject: [ts-7000] Re: TS-7800 micro-SD card usage
From: "wildpossumboy" <>
Date: Tue, 05 May 2009 03:56:53 -0000
--- In  Michael Schmidt <> wrote:

> 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.

<< SNIP >>


> 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.

Hi Michael.

I don't have any 0Xda (confirmed) partition(s) on the micro-SD device at all, 
so accordingly the device should not boot. I have only one partition 0x83 
(Linux). Am I correct in interpreting your comments above that any partition 
other than 0xda will cause the booting process to NOT boot from that device. Or 
did you mean that if the device has a 0xda partition it will not try to boot of 
the device?  The second option makes more sense in a way.

Could you kindly verify your understanding as I have to find a way of using the 
micro-SD card for application data.

OK, I could use the card for booting the kernel but as far as I understand from 
the documentation I forced in having fixed partition sizes for booting, hence 
any large flash device becomes useless for any more than 512KB. Is this also 
correct? 

Is there a way to "fool" the system into allowing the remainder of disk space 
in another partition to be used for applications data?
If your comment meant to say a partition formatted as 0xda, then would it 
suffice to create a boot partition formatted as 0xda, and place additional 
partitions using 0x83 etc...?

Thanks for you inputs.
Best regards.
Grahame




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