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Question on Proxmox Pools (I'm a bit of a noob) (lemmy.world)

submitted 1 year ago by [email protected] to c/[email protected]

23 comments fedilink hide all child comments

I've added 2 external USBs of 2TB each to my Proxmox server and created a Resource Pool called USB_HDD containing both. I created an Ubuntu VM, but I can't allocate all 4TB to it in one go - it only allows me to add each one as a separate SCSI device. When I start to install the OS it only allows the install onto one of the 2TB devices. I though the point of pools was to make the actual disks transparent, and present the pool to the VM so it sees it as one lot of space. Am I doing something wrong, or do I have to have it as 2x2TB disks?

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[–] [email protected] 3 points 1 year ago (1 children)

looked into ZFS but if I use that it halves the available disk space to 2TB.

Look harder :-)

ZFS can do it either way.

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago) (2 children)

Indeed ZFS has support for stripe (RAID0 like) ~~vdev~~ zpool since very early days.

[–] [email protected] 1 points 1 year ago

Be aware in RAID0 if one of the HDD fails, the content on both will be lost lost.

[–] [email protected] 1 points 1 year ago (1 children)

Would it be better to make single-disk vdevs and add them into a pool so you could add a mirror disk to each vdev later?

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago)

Oh right my fault. Stripe is done at the pool level. So the two disks will be their own vdevs. And then the two vdevs are added into one zpool.