The Media pool. You say striped so that was something like a 3TB + 3TB for 6TB of space in the Pool? If a drive fails in that configuration of a VDEV, the entire pool is lost.
Check on the model of the PCIe SATA card. We recommend HBA cards and not ‘port expanders’. If the SATA card is a SATA switch, it may be okay.
What’s all the noise about HBA’s, and why can’t I use a RAID controller?
Multiply your problems with SATA Port Multipliers and cheap SATA controllers
