[lug] RAID1 Versus Mirrored LVM (Fedora 23)

Stephen Kraus ub3ratl4sf00 at gmail.com
Sat Sep 24 13:21:25 MDT 2016

I like RAID, but I also have a ZFS array. ZFS is generally faster, but its
more dependant on you to ensure the viability of the array info and health.

On Sep 24, 2016 11:09 AM, <stimits at comcast.net> wrote:

> Hi,
> It's becoming more obvious that I need to dig into details of LVM and
> RAID. I had originally started out with the intent to produce a mirrored
> RAID1 on two new disks, and then use that with LVM to divide up the content
> between "/home" and "/var/www". None of those mount points require booting
> to them, so this partially simplifies things.
> Until recently I wasn't even aware that LVM itself can have physical
> volumes combined into mirrored logical volumes in the same way as RAID1
> does. So now I'm wondering if it would be wise to remove the RAID1+LVM
> design and instead just use LVM with mirroring of two ordinary disk drives.
> Is there anything special about reliability or performance...or anything
> else...which would influence the choice of RAID1+LVM versus
> LVM-with-mirroring? Why would I pick one scheme over the other?
> Thanks!
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