[CentOS] EFI and RAID questions

[Eliezer Croitoru]

Hey there,

And why not use HW raid and use monitoring tools for it?
What raid card are you using that cannot be monitored?

Eliezer

On 05/10/2014 07:36 PM, CS_DBA wrote:
> Hi All;
>
> I have a new server we're setting up that supports EFI or Legacy in the bios
>
> I am a solid database guy but my SA skills are limited to what I need to
> get by
>
> 1) I used EFI because I wanted to create a raid 10 array with 6 4TB
> drives and apparently I cannot setup gpt partitions via parted in legacy
> mode (at least that's what I've read - is this true?)
>
> 2) I installed the OS on 2 500GB drives, I used to do all my installs
> with software RAID (mirrored) without LVM as follows:
> - create 2 raid partitions (one on each drive)  for swap, /boot and /
> - create a raid1 device for each set of partitions above
>
> The installer would not let me proceed without a /boot/efi partition I
> tried to create a raid partition on each drive for this and create a
> /boot/efi raid disk but when I doit this way in the installer I no
> longer see the "EFI SYSTEM Partition" as an option for the filesystem
> type so this did not work either.
>
> I ended up doing hardware raid for the OS drives and software raid for
> the 6 4TB data drives. It works but I prefer to do software raid for
> everything so we ca have standard methods of monitoring for bad drives.
>
> Is there a way to setup software raid with EFI?
>
> Do I need to add a /boot/efi partition only to one of the 2 OS drives?
> If so how do I recover if we loose the drive with the /boot/efi partition?
>
> Is it required to use LVM to do this?
>
> Thanks in advance
>
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