RAID

[Anders Karlsson]

On 12/30/05, Phillip Susi <psusi at cfl.rr.com> wrote:
> Yes, LVM allows for RAID.  It can handle concatenation/jbod, mirroring,
> striping, and I believe even raid5.  It seems that the MD system is
> still supported, but will be depreciated at some point in future kernels
> once the device mapper becomes more accepted.

I really want to read the documentation that details how to set up
RAID5 with just LVM2, so please post links to that documentation. I
can not find them at all, but am very interested in how they do it.
Similarly, I can not find any documentation on how to do RAID1 with
just LVM2, so if you have links for that as well, they would be
appreciated.

I did locate one interesting document about device mapper being
"capable of mapping block devices in various ways (eg. linear,
striped, mirrored)" by Heinz Mauelshagen. The tool dmraid is required
for this, much like mdadm is required for managing MD devices.

It may be that device mapper will take over from MD at some point in
the future, but that seems a long way off considering the disparity in
capabilities.

--
Anders Karlsson <trudheim at gmail.com>