Hello Jan,

Skipped a lot of quotes.

HD>> When sailing and traveling with my foldable bike,
HD>> I do not have enough room to transport a large amount of computer
hardware.
HD>> So next time I have to take 2 cardreaders with me, and leave that clean
HD>> underware out of my case ;-).
HD>> I did not use it anyway this time.
HD>> But if I take two cardreaders with me, you should see I only need one,
HD>> and because of an accident (bad meal), I do not have clean underware.
HD>> So it is always trouble to pack the right things when traveling ;-).

JP> Yes, that is complicated, you could go naked though, only wear a
JP> backpack.

No do it the other way round, wear the long and tick heavy clothes you need
local, and pack just the small parts to keep it compact on bike/train.
Ok, it's hot when traveling, but then you can carry as much as possible.

JP> You did say 'you do not use machine during copying'
JP> Linux is very much alive, it is doing things all the time, type
JP> ps avx
JP> to see some processes.
JP> or type
JP> top

I knew there were, but not the amount of it.

JP> That sort of fiddling is not a chance I want to take,
JP> but maybe for an emergency copy..

Yes, that was the case here.

JP> The other problem you then have is that you cannot run a verify.
JP> diff myimage /dev/sd?

Until now I never did.
I just tried if the copy works well.
But indeed shut down the source card, and making a backup of it when it not
runs is the best procedure.

JP> I wrote a special program for that to compare dvd and bluray images, but
JP> it will compare anything:
JP> http://panteltje.com/panteltje/dvd/dvdimagecmp-0.3.tgz
JP> dvdimagecmp -a /dev/sd? -b myimage.iso
JP> should work

Some time I will have a look at it, thanks.

JP> Every disk burn here is compared with it, it gives relative speed
JP> compared to CDs and reports sectors that differ too.

For CD's that comparision is really necessarry,
as CD's are not as reliable as magnetic storage is.

JP> Anyways, for 'on the road' (or in a train) I have a small Asus eeepc
JP> that runs Linux with a Huawei 3G USB stick to connect to the net,
JP> takes hardly any space, and has a real keyboard.

That real keyboard is a must I think.
But the EEEPC has little memory and small storage.

JP> Usually I just ssh -Y to my home LAN with it,

Some Dutch friend in FidoNet used a Raspberry Pi 3B in his backpack running on
a local powerbank using WiFi and 3G.
His very small portable machine was connected to it via his own WiFi.
Nice to see at the HCC computerclub in De Bilt last year.
He has internet connection to his home and nobody sees a 3G dongle ;-).

JP> and nobody could tell I was not there.

Ofcourse one can say that. Your mobile connection was via a GSM mast.
You are watched by camera's everywhere today, and the police can find you via
your mobile phone and/or cash dispencers you used, or digital payments with
your PIN card.
So donot tell the phrase you did above, it simply is not true ;-).
And second your connection has two weak links, the 3G provider,
and your local ISP at home, i.e. ADSL or Fibre.

When the Boiler at home has a leakage, the RCD could shut down and your home
router and internetconnection also.
Luckily I do not have such a boiler, but many years ago I had a timerswitch
which activated my RCD ones a day, until I found out the source of the problem.
So modern technology is not allways working well, donot rely to much on it.

Henri.

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