Re: Plans for anaconda LVM/RAID support

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On 10/15/2012 03:46 PM, Bill Davidsen wrote:
> Ian Pilcher wrote:
>> I'm sure that this information is somewhere on the Fedora Wiki,
>> but my search-fu apparently isn't up to the task of finding it.
>> 
>> What are the plans for LVM and/or software RAID support?
>> 
>> Currently (F18 Beta TC2), it seems to be impossible for those of
>> us who have fully allocated our storage to either (or both) of
>> these technologies to install Fedora 18 at all.
>> 
> How would that work? Not the install, but the boot? Unless your
> BIOS knows how to handle LVM/RAID or you think you can shoehorn
> them into a boot sector, doesn't the boot need to be a normal
> partition?

Mirroring is fairly straightforward since you just need a bootloader
on each bootable disk. Some BIOSes are less helpful than others when
it comes to booting with a failed drive but with the right system it's
possible to have a reliable set up (most of my server boxes use MD
mirrors for boot).

> Maybe I see too many dumb BIOS problems working with little ATOM
> and similar appliances, but getting them to boot anything seems an
> issue, and even with non-PC partitioning layouts I would expect to
> need one simple boot partition the BIOS could understand.

The BIOS only really needs to understand where to load a first stage
bootloader from - the traditional MBR protocol from the 80s (with a
few extras bolted on here and there). Different BIOSes are better or
worse in this area and some really are crap but that doesn't seem like
a reason to not support those layouts for systems where they do work.

Regards,
Bryn.

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