I've just erased the MBR of a (working!) SD card to get rid of the RPi3 partitions on it, so I could re-format it (on XPsp3) using FAT32 and copied the Noobs 3.0.0 files onto it. Alas, when put into the RPi3 it doesn't want to boot.
Neither. From within "computer management" (the partition manager).
But I think I found the cause: when I used HPs formatting tool (HPUSBFW) the SD worked again. The difference ? The former formatted the SD as being a mega-floppy (starting with a simple boot record), while the latter wrote an MBR with a single partition.
On Sun, 20 Jan 2019 21:03:16 +0100, "R.Wieser" declaimed the following:
No... It was a small number of blocks intended to be used by security software running on the host computer (the S in Secure Digital). Likely meant to contain part of a decryption key which software could then use to access files on the regular part of the card.
Otherwise they are basically MultiMediaCard (MMC).
""" SD/SDHC/SDXC memory cards have a "Protected Area" on the card for the SD standard's security function. Neither standard formatters nor the SD Association formatter will erase it. The SD Association suggests that devices or software which use the SD security function may format it. """ (Doesn't explain if using block erase operations on the device can hit that area)
Wulfraed Dennis Lee Bieber AF6VN