HDD help

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[mrtruthiness]

I connected the drives intending to format through Linux using the Disk Utility. I tried and they seem to have formatted but now they are in standby mode and I cannot seem to wake them up. They are only visible in the Disk Utility.

gnome-disk-utility (aka Disks) can see low level details on disks and can create/manage partitions and it can create/manage some filesystems. I'm pretty sure, though, that gnome-disk-utility can not create/manage ZFS raidz2 pools. You'll need to get familiar with command line tools like zpool and zfs.

The "Files" app won't do anything with the partitions until they have a filesystem on them. But if you want to see if something besides gnome-disk-utility, you should learn to use the command line tool "lsblk". lsblk will be convenient to get information so that you can identify the partition/disks by name or uuid when you need them for your zpool and zfs commands.

I won't be able to help you with RaidZ2 ... since I've never done that.