I am running Ubuntu 14.04 on a remote server. It's the only OS installed. I need to be super-cautious before rebooting the machine since KVM access to the server is quite tricky.During a GRUB update, I am asked where to install GRUB. There is Raid1 on the disks. I am not sure where I should.Here is the mount table:# mount/dev/md2 on / type ext4 (rw)proc on /proc type proc (rw)sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)none on /sys/fs/cgroup type tmpfs (rw)none on /sys/fs/fuse/connections type fusectl (rw)none on /sys/kernel/debug type debugfs (rw)none on /sys/kernel/security type securityfs (rw)udev on /dev type devtmpfs (rw,mode=0755)devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)none on /run/shm type tmpfs (rw,nosuid,nodev)none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755)none on /sys/fs/pstore type pstore (rw)/dev/md1 on /boot type ext3 (rw)/dev/md126 on /home type ext4 (rw,noexec,nosuid,nodev)/dev/md127 on /backup type ext4 (rw,noexec,nosuid,nodev)systemd on /sys/fs/cgroup/systemd type cgroup (rw,noexec,nosuid,nodev,none,name=systemd)And, here is fdisk output:# fdisk -lDisk /dev/sdb: 2000.4 GB, 2000398934016 bytes255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x000b5404   Device Boot      Start         End      Blocks   Id  System/dev/sdb1            2048    33556480    16777216+  fd  Linux raid autodetect/dev/sdb2        33558528    34607104      524288+  fd  Linux raid autodetect/dev/sdb3        34607105  1094607934   530000415   fd  Linux raid autodetect/dev/sdb4      1094607935  3907029167  1406210616+   5  Extended/dev/sdb5      1094607998  2154608764   530000383+  fd  Linux raid autodetect/dev/sdb6      2154608828  3907029167   876210170   fd  Linux raid autodetectDisk /dev/sda: 2000.4 GB, 2000398934016 bytes255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00044ee7   Device Boot      Start         End      Blocks   Id  System/dev/sda1            2048    33556480    16777216+  fd  Linux raid autodetect/dev/sda2        33558528    34607104      524288+  fd  Linux raid autodetect/dev/sda3        34607105  1094607934   530000415   fd  Linux raid autodetect/dev/sda4      1094607935  3907029167  1406210616+   5  Extended/dev/sda5      1094607998  2154608764   530000383+  fd  Linux raid autodetect/dev/sda6      2154608828  3907029167   876210170   fd  Linux raid autodetectDisk /dev/md127: 897.1 GB, 897104996352 bytes2 heads, 4 sectors/track, 219019774 cylinders, total 1752158196 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000Disk /dev/md127 doesn't contain a valid partition tableDisk /dev/md0: 17.2 GB, 17171349504 bytes2 heads, 4 sectors/track, 4192224 cylinders, total 33537792 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000Disk /dev/md0 doesn't contain a valid partition tableDisk /dev/md1: 536 MB, 536543232 bytes2 heads, 4 sectors/track, 130992 cylinders, total 1047936 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000Disk /dev/md1 doesn't contain a valid partition tableDisk /dev/md2: 542.6 GB, 542586207232 bytes2 heads, 4 sectors/track, 132467335 cylinders, total 1059738686 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000Disk /dev/md2 doesn't contain a valid partition tableDisk /dev/md126: 542.6 GB, 542586174976 bytes2 heads, 4 sectors/track, 132467327 cylinders, total 1059738623 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000Disk /dev/md126 doesn't contain a valid partition table
Where to install GRUB?
grub2;grub;raid