Re: DOS bootsector needed for NOOBS install?

From	"Markus R. Kessler" <dimke.fax@uni.de>
Newsgroups	comp.sys.raspberry-pi
Subject	Re: DOS bootsector needed for NOOBS install?
Date	2015-11-23 11:31 +0000
Organization	A noiseless patient Spider
Message-ID	<n2utdu$en4$3@dont-email.me> (permalink)
References	(3 earlier) <n2phhg$v4t$1@dont-email.me> <B954y.397670$eu4.165179@fx44.am4> <n2qq1u$jhq$1@dont-email.me> <n2uooh$en4$1@dont-email.me> <xsC4y.479267$Ni7.237153@fx40.am4>

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Am Mon, 23 Nov 2015 11:08:11 +0000 schrieb Dom:

> On 23/11/15 10:11, Markus R. Kessler wrote:
>>
>> Hi,
>>
>> this is slightly offtopic here, but worth to mention anyway:
>>
>> When the ISO is written the first time, afterwards the installation /
>> setup process will boot from the SD card and then attempt to write the
>> MBR.
>>
>> Once, during one of my experiments, I forgot to remove the Write
>> Protection on the Micro-SD to SD adapter, and, guess what?
>>
>> The setup process continued, though the plastic switch was on "Lock".
>> The MBR got written corretly and Raspbian finally ran, no matter if the
>> card was set to RW or RO (!)
>>
>> This, finally, means, that even a virus or trojan can write to "write-
>> protected" SD cards. Maybe this is a hardware issue only concerning
>> this adapter (I have no second one to test), but since it comes from
>> "Imation", I assume that it is OK. That's somehow frustrating...
> 
> The slider on the adaptor/full sized card isn't connected to anything
> inside. It actuates a switch in the SD card socket, which controls
> write-protect in software only. On the Pi A/B that switch is not
> connected to anything and has no effect. On a micro SD card there is no
> such switch mechanism.

Hi Dom,

I was wondering, because when putting the same Mico-SD-card as a "write-
protected" (full-size) SD-card into a notebook, it was then mounted as 
"RO", as long as the slider was on "Lock". So, this really seems just 
like a "recommendation" to the OS, to please not write data onto it.

Thanks, this makes things clearer!

Best regards,

Markus

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DOS bootsector needed for NOOBS install? "Markus R. Kessler" <dimke.fax@uni.de> - 2015-11-19 22:12 +0000
  Re: DOS bootsector needed for NOOBS install? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-11-20 09:58 +0000
    Re: DOS bootsector needed for NOOBS install? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-11-20 10:10 +0000
      Re: DOS bootsector needed for NOOBS install? The Natural Philosopher <tnp@invalid.invalid> - 2015-11-20 10:15 +0000
        Re: DOS bootsector needed for NOOBS install? "Markus R. Kessler" <dimke.fax@uni.de> - 2015-11-20 14:04 +0000
  Re: DOS bootsector needed for NOOBS install? "M.O.B. i L." <mobil@orbin.se> - 2015-11-21 00:51 +0100
    Re: DOS bootsector needed for NOOBS install? Dom <domafp@blueyonder.co.uk> - 2015-11-21 05:47 +0000
      Re: DOS bootsector needed for NOOBS install? "M.O.B. i L." <mobil@orbin.se> - 2015-11-21 11:39 +0100
        Re: DOS bootsector needed for NOOBS install? Dom <domafp@blueyonder.co.uk> - 2015-11-21 21:15 +0000
          Re: DOS bootsector needed for NOOBS install? Martin Gregorie <martin@address-in-sig.invalid> - 2015-11-21 22:09 +0000
            Re: DOS bootsector needed for NOOBS install? "Markus R. Kessler" <dimke.fax@uni.de> - 2015-11-23 10:14 +0000
            Re: DOS bootsector needed for NOOBS install? Dom <domafp@blueyonder.co.uk> - 2015-11-23 11:08 +0000
              Re: DOS bootsector needed for NOOBS install? "Markus R. Kessler" <dimke.fax@uni.de> - 2015-11-23 11:31 +0000

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