[Oberon] FPGA - Save / Restore OBERON.FS

[Paul Reed]

Hi Tomas,

I think Chris' method is safer.  If the Kernel reports 921 sectors in use,
it doesn't necessarily mean they are contiguous.

Cheers,
Paul


> Hi Christopher,
>
> Thank you, I have in the end resorted to:
> $ dd if=/dev/sdc of=OBERON1.FS bs=1K skip=265K
> count=65K
>
> `System.Watch' reports 921 sectors used, so I tempted to try
> $ dd if=/dev/sdc of=OBERON1.FS bs=1K skip=265K
> count=921, instead.
>
> Which goes very fast on RPI here.
>
> Tomas
>
> On Thu, 13 Apr 2017 20:43:16 +0200
> Tomas Kral <thomas.kral at email.cz> wrote:
>
>> Hi,
>>
>> EDIT, at the end
>> EDIT(2), at the end
>>
>> Reading some earlier post by Paul Read, I look for `dd' syntax to save
>> and restore my work on uSD card.
>>
>> Providing
>> uSD card is formatted as 256MB FAT + 65MB OBERON.
>>
>> Restore my work indexed as `1' may work like this,
>> $ dd if=OBERON1.FS of=/dev/sdc bs=1024 seek=262145
>>
>> By how about saving the work first,
>> $ dd if=/dev/sdc of=OBERON1.FS bs=1024 skip=262145 count=???
>>
>> What count should I use?
>> `System.Watch' may give a clue, but does not seem exact.
>>
>> EDIT, correction
>>
>> I could also use a fixed value of the whole 65MB Oberon partition, but
>> not sure if below is correct
>> $ dd if=/dev/sdc of=OBERON1.FS bs=1024 skip=262145
>> count=$((65*1024))
>>
>> EDIT(2), correction
>>
>> Reading `dd' manual, allows for suffixes,
>> $ dd if=/dev/sdc of=OBERON1.FS bs=1K skip=265K
>> count=65K
>> Correct?
>>
>> Many thanks.
>> Tomas
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>
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