Greg Freemyer <greg.freemyer@xxxxxxxxx> writes:
> ==> What I mean by raid equivalent levels
>
> More and more arrays allow the user to simply say "give me a 100 GB
> logical volume with Raid 5 equivalent protection. The array then
> looks at the drives it has available and puts together the necessary
> pieces. As drives are added, removed it moves the data around under
> its own control, but maintains the raid equivalent protection.
>
> Especially when working with dozens of drives and lots of logical
> volumes it makes life much easier. Admittedly it may come at a cost
> of not being able to specify raid levels with the specificity that
> mdraid currently allows.
>
> ==>
>
> The reason I ask if this is the goal is that doing so may factor into
> decisions about how reshaping is implemented.
>
> Greg
That really seems to scream for LVM to support more raid levels. It
already has linear, raid0 and raid1 support (although I have no idea
how device mapper raid1 compares to md raid1).
Those should be fleshed out more and also support raid 4/5/6 for what
you ask.
MfG
Goswin
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