[Swlug] using lvm for mirror

[Ben Tullis]

Terrible autocorrect error:

I mistakenly wrote:

> You can't do what you originally suggested, but you might be making it more complicated than it needs to be.

This should say, you **can** do what you originally suggested.

Apologies for the Confucious.

Ben

On 1 December 2021 21:18:45 GMT, Ben Tullis via Swlug <swlug at mailman.lug.org.uk> wrote:
>Hi bascule,
>
>This is why I would use LVM on top of MD raid.
>
>Let's say you have two 1TB drives in your host system.
>
>Take 10 GB from each to mirror /boot. (That's very generous). Let's call this /dev/md0
>
>Take another 10 GB to mirror swap. (That's probably over-generous and 
>assumes you can hot-swap. You could use RAID 0 and get 20 GB of faster swap instead, but that's not important right now. Let's call this /dev/md1
>
>Then you have 980 GB to mirror the remainder of the drive. Let's call this device /dev/md2
>
>Do a pvcreate /dev/md2
>
>Create a volume group using /dev/md2 - Let's call this volume group vg-mirror
>
>Create a logical volume on this volume group for your Windows VM. Give it 100 GB or whatever. Let's call this logical volume vg-mirror/lv-windows
>
>You still have 880 GB on your vg-mirror volume group, in which you can create other mirrored logical volumes. You can use this for lv-root, lv-home and so on.
>
>Hope that makes sense. I'm not near a computer at the moment, or I'd copy and paste some LVM commands to demonstrate.
>
>You can't do what you originally suggested, but you might be making it more complicated than it needs to be.
>
>Kind regards,
>Ben
>
>On 1 December 2021 20:48:26 GMT, bascule via Swlug <swlug at mailman.lug.org.uk> wrote:
>>thanks Matt and Ben, the usage would be to house an ntfs volume for my win10 
>>vm, i wouldn't want to use a whole drive, just two partitions each on a 
>>separate drive, would this be ok using mdraid?
>>
>>bascule
>>
>>
>>
>>
>>-- 
>>Swlug mailing list
>>Swlug at mailman.lug.org.uk
>>https://mailman.lug.org.uk/mailman/listinfo/swlug
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