I have a windows xp machine. 
I used a cd to boot into tinycore 3.7,  then I  add some extensions to it,  all this done in cloud mode.
I have been trying many times to create a remastered iso  while I am in cloud mode, it's all in vain.
I  mount my windows xp hard disk , and save the remastered iso there,  however when I reboot, it seems to disappear,  although I have saved it to the hard disk. 
can someone explain to me what I am doing wrong ?
when you mount a hard disk, does it really mount the hard disk ?  if it does, why does the file disappeared after I rebooted back  the machine with windows. 
thanks in advance for your help