Re: [gentoo-user] best practise for 4 disks ... redundancy

["Stefan G. Weichinger" <lists@xunil.at>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

On 11.03.2015 23:32, Neil Bothwick wrote:
> On Wed, 11 Mar 2015 23:14:49 +0100, Stefan G. Weichinger wrote:
> 
>> Am 11.03.2015 um 17:06 schrieb Neil Bothwick:
>> 
>>>> So RAID1 with vfat as ESP ?
>>> 
>>> That's how I'd do it. I have /boot on RAID1 on this box (but
>>> not as FAT and it's a BIOS motherboard) with everything else on
>>> a btrfs RAID and it works well.
>> 
>> I will redo my setup tomorrow ... thanks So your suggestion is
>> with MBR and not GPT?
> 
> Absolutely not! MBR is fragile, limited and horrible. I use GPT but
> not UEFI because this is a pre-UEFI motherboard.
> 
>> I still wonder if to do UEFI and GPT because both are the more
>> modern ways of doing things (and be prepared for future
>> developments) or just stay with BIOS and MBR as long as I don't
>> need it (with disks smaller than 2 TB etc)
> 
> Given the choice, I'd use GPT for the above reasons and UEFI
> because Gummiboot is nicer than GRUB.

I now have a dedicated ESP on /dev/sda2 (non-RAID) and it boots via
gummiboot (-> UEFI).

dracut assembles the arrays after configuring this:

# /etc/dracut.conf

add_dracutmodules+="lvm bash mdraid"

hostonly="yes"

mdadmconf="yes"

# the uuids of my two arrays ...
kernel_cmdline+=" rd.md.uuid=7663e24a:1a64ce0f:49545629:46742031 "
kernel_cmdline+=" rd.md.uuid=8c266e7a:870c97b7:ff199683:6d8c3edb "

# end


(lvm isn't necessary but doesn't hurt)

I now wonder if I could

(a) create a RAID1 over /dev/sd[abcd]2 and format it as vfat ESP

or

(b) "clone" /dev/sda2 -> format each /dev/sd[abcd]2 as vfat, copy the
content of /boot in there and install gummiboot to each harddisk

?

Stefan

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
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=ge3y
-----END PGP SIGNATURE-----