No, using RAID isn’t uncommon. A raid 5 will still be faster than sata ssd.
Hi, i would like to size a TX640 with 4 x 1,6TB NVMe disks and install a VMware ESXi 6.5u1 on it. Now my questions are - Am i able to use the complete capacity like in a raid 5 of 4 x 1,6 TB???  - Will esxi 6.5u1 be supported on a TX640 on internal SSDs (140GB Raid1) + NVMe Datastore?   Best regards
TX640 - NVMe Question