Ubuntu Server Not booting

[Bmoney]

I have a HP wx8600 workstation 2x xeon x5430, 16 gb ram, boot ssd

I recently added 4x 4tb western digitial enterprise drive to create a new zfs pool. But after cable management and adding the drive the server won't boot WHY?!

It freezes on importing ZFS filesystems and then just stops. and ask to boot in default mode and I can't get any further.

[daehned]

Did you tried to boot the server without the new drives to ensure that everything else is okay?

[Bmoney]

The issue wasn't the ZFS it was single mounted drive I had switching the physical ports and in turn the system change the drive letters and it then couldn't mount.