Proxmox with preexisting MD array

[Mayaa]

So up until now i've been using regular barebones Ubuntu Server with a storage array with linux software raid.

I've been planning on moving over to proxmox to test out some virtualization but since the majority of my harddrive storage is in this array, is it possible to mount it in proxmox? or at the very least inside a VM?

[Electronics Wizardy]

proxmox is just debian under the hood, so md arrays will work fine. THen you can pass tht to a vm if needed.

[BloodKnight7]

You can put the drives in the md in passthrough mode or create virtual drives and then present them. Up to you!

[Mayaa]

20 hours ago, BloodKnight7 said:

You can put the drives in the md in passthrough mode or create virtual drives and then present them. Up to you!

How would i go about doing that? it seems that proxmox believes they are in use because there are partitions on the drives? at least through the web GUI

Do i have to go through the command line for it?

[Electronics Wizardy]

37 minutes ago, Mayaa said:

How would i go about doing that? it seems that proxmox believes they are in use because there are partitions on the drives? at least through the web GUI

Do i have to go through the command line for it?

I think you have to use the command line.

 

BUt id just have it use the md array on the host and passthough a virtual disk or do a nfs share.

[Mayaa]

4 hours ago, Electronics Wizardy said:

I think you have to use the command line.

 

BUt id just have it use the md array on the host and passthough a virtual disk or do a nfs share.

So i managed to get my SSD working at least since i just wanted to reformat it anyway, however it seems like my array doesnt show up in fdisk.

The 2 disks in the array do show up though.

 

Im not sure how i would make the md array show up, or what to do / mount it if it did show up.

 

EDIT: Managed to get the array to show up, but still not sure how to mount it.

[BloodKnight7]

what powervault md model you got? MD1000? MD1200? MD3000? 

[Electronics Wizardy]

11 hours ago, Mayaa said:

So i managed to get my SSD working at least since i just wanted to reformat it anyway, however it seems like my array doesnt show up in fdisk.

The 2 disks in the array do show up though.

 

Im not sure how i would make the md array show up, or what to do / mount it if it did show up.

 

EDIT: Managed to get the array to show up, but still not sure how to mount it.

whata does lsblk look like?

 

What filesystem?

 

10 hours ago, BloodKnight7 said:

what powervault md model you got? MD1000? MD1200? MD3000? 

I think your thinking of the wrong md

[Jarsky]

On 5/10/2020 at 5:47 PM, BloodKnight7 said:

what powervault md model you got? MD1000? MD1200? MD3000? 

I believe he's talking about MDADM (MD)...

 

 

For importing an MD array into a new machine, because /dev devices can change, you should get the UUID from both and compare. 

 

Run this command through both operating systems to compare..what the structure is of your existing /dev/md, and to see what UUID (physical disks) are mounted as which devices. You need to do this, as /dev/sda, /dev/sdb, /dev/sdc...might be /dev/sdb,/dev/sda,/dev/sdc on your new OS...the important thing is the order of the UUID's. 

sudo lsblk
sudo blkid

 

Then when you're confident about what the original order is, you run a command like this to assemble.

 

mdadm --assemble --scan --verbose /dev/md{number} /dev/{disk1} /dev/{disk2} /dev/{disk3} /dev/{disk4}

 

Keep in mind, that writing to it incorrectly, could cause data destruction. You should typically always create the device first using the --readonly flag, to mount the disks without changes and see if data is readable and consistant. 

 

 

 

 

[Jarsky]

P.S instead of blkid, you can also use this to give a more readable format. 

I can't post the text, because LTT is sh**ting itself over me exploiting the forums.....