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

ramblechat@lemmy.world to Selfhosted@lemmy.world – 15 points –

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

Look harder :-)

ZFS can do it either way.

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

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

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?

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.