I've got two pendrives. I want to install a Debian on them. RAID1. Ok... ... After I installed it in RAID1, it works perfectly, ok! :) When I pull out one of the pendrive [good pendrive], it still boots up, hurrah :) But: ... When I pull out the other pendrive [i plug in the first one i tried] it say's: GRUB hard disk error What can I do? I already tried: grub-install /dev/sdc <-that's the pendrive name [bios -> hard drive emulation=hard drive, not auto] or: # grub find /boot/grub/stage1 hd0,0 hd1,0 root (hd0,0) setup (hd0,0) etc. What's the solution? Please help me:\ I can't just dd the first 512 Byte of the "good pendrive", because the uuid is stored there. [needed for the sraid..] It gets to the grub, so it's not a ""boot-order problem"" How can I install grub to these two pendrives, so that if one of the pendrives die, it would still be a bootable system?