Module 7: IP SAN, FCoE, NVMe-OF (NVMe Over Fabrics Overview)

Question 1

What is NVMe?

Answer 1

Nonvolatile Memory express - computer to disk connectivity that is developed for NVM devices

Question 2

How does NVMe work?

Answer 2

connects directly to embedded storage controller in motherboard - not PCIe - allows for maximum performance

Question 3

How many ques can NVMe handle?

Answer 3

65,535 ques and 65,536 que commands

Question 4

What is a limitation of native NVMe?

Answer 4

can’t connect to NVM storage devices outside of the server

Question 5

What is NVMe Over Fabrics?

Answer 5

enables the NVMe protocol to be transported over FC or other protocols

Question 6

What speed does NVMe-OF run on FC?

Answer 6

Atleast 32gbs - allows NVMe commands to travel directly through the fabric without needing FC-4 SCSI protocol layer

Question 7

What is NAND?

Answer 7

type of nonvolatile flash memory - does not require continuous power to retain stored data (EX: USB)

Question 8

What is Storage Class Memory (SCM)?

Answer 8

type of NAND flash device - includes powerback to ensure data won’t be lost if power is removed

Question 9

Why is a power backup required in SCM devices?

Answer 9

since SCM uses standard DIMM as cache in front of persistent NAND to enhance performance,

Question 10

What is the naming convention for NVMe OF addressing?

Answer 10

NQN