Hi,
I'm having trouble reinstalling grub on a fedora20 system after adding
two new disks in addition to the two that are already installed. It
appears to install correctly, but after booting, only a single dot then
a flashing cursor is printed.
There are currently two RAID1 disks mirrored using mdadm mounted on /
and /boot, and I'm attempting to add two more to be mounted separately
on /var.
If I remove the new two disks I just installed the system boots normally.
My fstab after adding the new md2 partition for /var looks like this:
UUID=3c2510e3-1d30-4c5a-be1b-5639732acea8 / ext4
defaults 1 1
UUID=0c3a3ce6-dac9-4b8c-8836-4f086272427f /boot ext4
defaults 1 2
UUID=916747c5-3043-4ad6-9a6f-6e688bb0a731 swap swap
defaults 0 0
UUID=7e39732f-8080-4869-b218-4e45eada381e swap swap
defaults 0 0
/dev/md2 /var ext4
defaults 0 0
My /proc/mdstat looks like this:
# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5]
[raid4] [raid10]
md1 : active raid1 sda2[0] sdc2[1]
51198904 blocks super 1.2 [2/2] [UU]
bitmap: 1/1 pages [4KB], 65536KB chunk
md0 : active raid1 sda1[0] sdc1[1]
511988 blocks super 1.0 [2/2] [UU]
md2 : active raid1 sdb1[0] sdd1[1]
58581824 blocks super 1.2 [2/2] [UU]
Installing grub2 on sda appears to work but doesn't boot:
# grub2-install /dev/sda
Installation finished. No error reported.
I recalled installing the boot sector on md1 (on /) during installation,
but that doesn't work at all. I believe
# grub2-install /dev/md1
/usr/sbin/grub2-bios-setup: warning: File system ‘ext2’ doesn't support
embedding.
/usr/sbin/grub2-bios-setup: warning: Embedding is not possible. GRUB
can only be installed in this setup by using blocklists. However,
blocklists are UNRELIABLE and their use is discouraged..
/usr/sbin/grub2-bios-setup: error: will not proceed with blocklists.
Booting from the sysrescuecd to the two existing disks works fine. Below
is my fdisk output.
Disk /dev/sdb: 55.9 GiB, 60022480896 bytes, 117231408 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x4255c226
Device Boot Start End Blocks Id System
/dev/sdb1 2048 117231407 58614680 fd Linux raid autodetect
Disk /dev/sdc: 55.9 GiB, 60022480896 bytes, 117231408 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00079691
Device Boot Start End Blocks Id System
/dev/sdc1 * 2048 1026047 512000 fd Linux raid autodetect
/dev/sdc2 1026048 103426047 51200000 fd Linux raid autodetect
/dev/sdc3 103426048 117229567 6901760 82 Linux swap / Solaris
Disk /dev/sdd: 55.9 GiB, 60022480896 bytes, 117231408 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x3d870e51
Device Boot Start End Blocks Id System
/dev/sdd1 2048 117231407 58614680 fd Linux raid autodetect
Disk /dev/sda: 55.9 GiB, 60022480896 bytes, 117231408 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00013cd6
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 fd Linux raid autodetect
/dev/sda2 1026048 103426047 51200000 fd Linux raid autodetect
/dev/sda3 103426048 117229567 6901760 82 Linux swap / Solaris
Disk /dev/md2: 55.9 GiB, 59987787776 bytes, 117163648 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/md0: 500 MiB, 524275712 bytes, 1023976 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/md1: 48.8 GiB, 52427677696 bytes, 102397808 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Thanks for any ideas.
Alex
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