Check if the .iso files writing to usb disk are original?

[ziloshi]

The downloaded openSUSE-13.1-GNOME-Live-i686.iso has been checked, but I'm still paronoid, it may get polluted during the writing process to USB Disk, if it is being written to CD/DVD, I can run AcuHash in Windows to verify, how to do it to USB Disk?

[nrickert]

The downloaded openSUSE-13.1-GNOME-Live-i686.iso has been checked, but I'm still paronoid, it may get polluted during the writing process to USB Disk, if it is being written to CD/DVD, I can run AcuHash in Windows to verify, how to do it to USB Disk?

Personally, I don't bother to check.

I use "dd_rescue" in linux to copy the iso to the USB, and its output seems to indicate that it is checking. But it is never clear whether it is check what is actually on the USB, or what is in system buffers waiting to be written to USB.

You could always read the exact number of bytes (determined by the ".iso" size) from the USB into a file, and then compare file.

Once you have booted the USB, you won't be able to check. On the first boot it makes changes, so as to setup persistent storage.

[gogalthorp]

For DVD you can use check media. Not sure you can use that for USB. I never bother since writing to USB is pretty much error free. To DVD it is not since you can have bad media or even a bad write.

[robin_listas]

On 2014-07-04 16:46, gogalthorp wrote:
>
> For DVD you can use check media. Not sure you can use that for USB.

Nope.

You can compare the image on the stick to the original, but only before
booting it.

--
Cheers / Saludos,

Carlos E. R.

(from 13.1 x86_64 "Bottle" (Minas Tirith))

[nrickert]

For DVD you can use check media. Not sure you can use that for USB.

I just tried with the DVD from factory snapshot 20140626.

I got: This is not a opensuse medium

The last time that I tried -- maybe around the time of 12.2, it asked me to insert the CD or DVD that I wanted to check.

So, still no go for medium check from a USB.