Hey guys,
Long time user, first time caller. I've been using Fedora since it was
RH4. Many box sets later, I find myself with an issue I can't solve.
Even Google isn't helping me out much.
In previous (pre-F14) versions, I partition (msdos, not GPT) my
systems something like this:
# fdisk -l /dev/sda
Disk /dev/sda: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 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 identifier: 0x9e218bdf
Device Boot Start End Blocks Id System
/dev/sda1 * 63 530144 265041 fd Linux raid autodetect
/dev/sda2 530145 84437639 41953747+ fd Linux raid autodetect
/dev/sda4 84437640 3907024064 1911293212+ 5 Extended
/dev/sda5 84437703 3907024064 1911293181 fd Linux raid autodetect
sdb is setup identically. The idea is that sd[ab]1 is a RAID1
containing /boot. sd[ab]2 is another RAID1 containing an LVM VG which
contains the rest of the OS. Most of the time, the rest of the space
on the system is a final RAID1 for data. Sometimes, I'll have a RAID0
if performance is more important than uptime.
Here's the mdadm config:
# cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4]
md2 : active raid1 sda5[0] sdb5[1]
1911292021 blocks super 1.2 [2/2] [UU]
md1 : active raid1 sda2[0] sdb2[1]
41952651 blocks super 1.2 [2/2] [UU]
md0 : active raid1 sda1[0] sdb1[1]
264960 blocks [2/2] [UU]
unused devices: <none>
Then, here's what the (non-data) filesystems look like:
[root@blu images]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_blu0-lv_root
786M 635M 112M 86% /
tmpfs 5.9G 2.2M 5.9G 1% /dev/shm
/dev/mapper/vg_blu0-lv_tmp
1.5G 40M 1.5G 3% /tmp
/dev/mapper/vg_blu0-lv_var
1.5G 765M 638M 55% /var
/dev/mapper/vg_blu0-lv_usr
14G 11G 3.0G 78% /usr
/dev/md0 251M 144M 82M 64% /boot
/dev/mapper/vg_blu0-lv_home
5.0G 4.1G 656M 87% /home
So, under Fedora 16, I'm trying to duplicate this. I saw in the docs
that /usr shouldn't be split from /. OK. So, increase the size of
lv_root, and get rid of lv_usr. No big deal.
For my install, I setup (GPT, by default) partition tables with a
simplified version of above:
/dev/mapper/vg00-lv_root 2.0G on /
/dev/md0 on /boot
That's it.
sda1 is a 1049kB partition for "bios_grub". md0 is a raid1 of sda3
sdb2. md1 is sdb1 & sda2. Then, md1 holds the vg00. This is about as
simple as I can make it.
During the install, I select: Install boot loader on /dev/sda. Minimal
Install. Then I get a Warning "There was an error installing the
bootloader. The system may not be bootable". Looking at the other
virtual consoles shows me:
Alt-F3:
INFO storage: bootloader stage1 target device is sda
INFO storage: bootloader stage2 target device is md0
[Ed: Which is odd since I chose sda for the installation target in the
earlier step]
Alt-F5:
/sbin/grub2-setup: warn: This GPT partition label has no BIOS Boot
Partition; embedding won't be possible!.
/sbin/grub2-setup: error: embedding is not possible, but this is
required when the root device is on a RAID array or LVM volume.
Generating grub.cfg ...
Found linux image: /boot/vmlinux-3.1.0-7.fc16_x86_64
Found initrd image: /boot/initramfs-3.1.0-7.fc16_x86_64
done
Installation finished. No error reported.
/sbin/grub2-setup: warn: This GPT partition label has no BIOS Boot
Partition; embedding won't be possible!.
/sbin/grub2-setup: error: embedding is not possible, but this is
required when the root device is on a RAID array or LVM volume.
I know to let the RAID's finish building before I reboot, so that's not it.
After the reboot I get:
GRUB loading.
Welcome to GRUB!
error: no such device: 71ec265a-f934-40a6-b02d-3ff3a274d229.
Entering rescue mode...
grub rescue>
ls just shows "(hd0)". It doesn't show any partitions.
set shows:
prefix=(hd0)/grub2
root=hd0
"insmod normal" says "error: unknown filesystem."
I've tried "set prefix=(hd0,0)/grub2", then "insmod normal". That
gives "error: no such partition". I've tried passing 0, 1, and 2 as
values for the partition. They all give the same value.
I'm really not sure where to go from here. I can't believe I'm the
first person to do mdadm RAID1 under F16.
If I do a "default" partitioning installation, then everything works
fine, but I don't get RAID1. Or, any RAID at all. Just an LV spanning
my drives.
Finally, this behavior is consistent on physical hardware and in a VM under KVM.
How do I install onto RAID 1?
Thanks in advance,
MJ
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