OSDev.org

hai every body,

how can a hard disk or drive be write protected?

thanks

It depends at what level of software you want to write protect the drive...

I've seen BIOSes with a drive write protect option but I think all that did was disable int0x13 write commands. *Some* scsi drives have a jumper to set write protection on but it's not standard. You're stuck at coding write protection into the OS layer and not allowing apps direct hardware access.

-Chase

I need asm code or c++ source code to lock(write protection) and unlock(allowing writting) on the hard disk. if you know something please help me.

thanks

I think you're making it too complicated, dude.

void writeBlock(char *data) {
  if(hd->isWriteable()) writeData();
  else error("HD is write protected");
  return;
}

As far as I know, there is no standard way to write protect an HD in hardware... you'll have to make your own software substitude.

Jeff