Still having problems with UEFI + RAID0 stripped drives install

[Liam Proven]

On 8 May 2013 00:36, C.F.Scheidecker Antunes <cf.antunes at gmail.com> wrote:
> Liam,

Please bottom-quote on the list.

> Thanks for the tip.
>
> It is a notebook.

Yes, I got that.

> So, if you use a Linux RAID the performance is better than
> the UEFI system?

No. The difference is that the kernel and bootloader understand Linux
software RAID; they do not understand firmware fakeRAID. I would not
expect you to be able to successfully boot from a fakeRAID. In other
words, exactly the problem that you are having.

> Well, technically a UEFI RAID is also a software RAID.

Not really, no. Different thing.

There are 3 kinds of RAID these days:

[1] true hardware RAID, done by a controller chip: appears as a single
drive to the firmware and the OS

[3] software RAID: created by the OS out of multiple hardware drives

And between them:

[2] Firmware RAID, AKA firmRAID or fakeRAID: created by the
motherboard firmware working closely with a driver in the OS. Designed
to overcome limitations in workstation OSes imposed by proprietary-OS
manufacturers such as Microsoft and Apple. Windows NT & later and Mac
OS X are perfectly able to create and run software RAIDs, but this is
sold as a feature of the server versions and disabled in the consumer
products. Putting it back breaks the licence agreement, so motherboard
manufacturers came up with a cheap way to do it - firmware fakeRAID,
where the firmware and an OS driver collude to lie to the OS and tell
it that multiple disks are in fact one.

It is not desirable. Do not use it. There is no need with Linux.

http://superuser.com/questions/245928/does-fake-raid-offer-any-advantage-over-software-raid

http://forums.pcper.com/showthread.php?452851-Linux-software-RAID-versus-quot-fakeraid-quot-or-RAID-cards

http://skrypuch.com/raid/

> Yes, I love the SSDs but too much money. As I need more size than speed,
> then a 2x1TB 7200rpm drives do the trick for this system.

I think you are making a mistake in your priorities here, but again, I repeat:

*Do not use RAID 0.* It is an invitation to data loss. It doubles the
chance of disk failure.

--
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