|
If there are no class markings, it is not classed, and more or less equivalent to class 2. Class is largely irrelevant to our needs--you would need to benchmark your card for small-block (4kb) random write speeds to get any idea how it will perform as a boot drive. While that stat tends to decline in cards class 6 and higher, it also varies considerably between cards of the same class and make. A 2GB card isn't going to be a permanent solution anyway, so you don't need to worry too much about its stats if you just want to use it for a dry run to check things out.
You cannot "make a backup of the NC" and it would be pointless to do so. Maybe ClockworkMod Recovery could make a backup that it could later restore, if you wanted to unnecessarily make a CWM SD card. One of the programs you mention might be able to produce a disk image, but it's highly discouraged to read and write disk images over USB to the NC, due to the chance of interruption or data corruption. Any backup you did produce would be basically identical to the recovery image already on the device and/or a generic stock .zip you could download online.
It's already as backed up as it's going to get.
|