PowerMax and VMAX All Flash Solutions Design (Remote Replication Considerations)

Question 1

What is a required component of storage array to perform remote replication?

Answer 1

have dedicated FC or Ethernet ports

Question 2

What is required for extended remote replication connectivity?

Answer 2

optical or IP network

DWDM or SONET are examples of optical networks

Question 3

What is FCP?

Answer 3

Fibre Channel Protocol

designed to carry SCSI-3 data over an optical network

Question 4

What is the throughput that can be provided by a FC connection?

Answer 4

100MBs - 1.6GBs

Question 5

What is the distance that an FC connection can run?

Answer 5

500m - 10km

Question 6

What is required to establish a FC connectivity for replication?

Answer 6

create zones on the switch and define initiator/target relationships

zones create IO path between host and storage

Question 7

How has Ethernet technology evolved to reach 1GB/s for bandwidth?

Answer 7

combining IEEE 802.4 Ethernet with ANSI X3T11 Fibre Channel

Question 8

What is CWDM?

Answer 8

course wavelength division multiplexing

optical bandwidth technology used for increasing bandwidth of fiber

Question 9

How does CWDM work?

Answer 9

combines optical signals of different wavelengths on one strand of fiber

Question 10

What is the range of data CWDM is able to transport?

Answer 10

transports up to 18 wavelengths w/ channel spacing of 20nm

sprectrum grid of 1270-1610nm

Question 11

What is the typical range for 1550 nm window wavelengths?

Answer 11

1470nm-1610nm in 20nm increments

Question 12

What is the typical range for 1310 nm window wavelengths?

Answer 12

1270-1410nm in 20nm increments

Question 13

What is DWDM?

Answer 13

dense wavelength division multiplexing

involves the process of multiplexing different wavelength signals onto a single fiber

each fiber has a set of parrellel optical channels and each one uses slightly different wavelengths

Question 14

What are the 4 major topologies for DWDM networks?

Answer 14

DWDM point to point with or without add-drop multiplexing networking

fully connected mesh network

star network

DWDM ring network w/ OADM nodes and a hub

Question 15

What are SONET/SDH?

Answer 15

SONET = synchronous optical networking

SDH = synchronous digital hierarchy

standardized multiplexing protocols that transfer multiple bit streams over optical fiber using LEDs

Question 16

What can you use to transfer data over SONET/SDH when using a lower data rate?

Answer 16

can be transferred over an electrical interface

Question 17

What are the use cases for SONET/SDH?

Answer 17

to encapsulate earlier digital transmission standards like PDH

to directly support either ATM or POS networking

Question 18

What is compression?

Answer 18

reduces the size of a dataset

Question 19

What is deduplication?

Answer 19

identifies identical data sets and stores a single instance

Question 20

What data reduction technologies are available on PowerMax but not VMAX?

Answer 20

Extended Data Compression (EDC)

Inline Dedupe

Data Reduction IO Module

DEFLATE Compression Algorithm

Question 21

What data reduction technologies are available on VMAX but not PowerMax?

Answer 21

Compression IO Module

LZS Compression Algorithm

Question 22

What data reduction technologies are available on both PowerMax and VMAX?

Answer 22

Adaptive Compression Engine (ACE)

FBA Storage Resource Pool

Question 23

What is D@RE?

Answer 23

provides hardware based on array back-end encryption

protects information from unauthorized access when physical drives are removed from the system

Question 24

How does D@RE work?

Answer 24

provides encryption on the BE using IO modules that incorporate 256-bit AES-XTS encryption

modules encrypt and decrypt data as it’s being written/read

Question 25

How are drives encrypted w/ D@RE on PowerMax/VMAX?

Answer 25

all configured drives are encrypted including spares using unique DEK per drive

Question 26

What key management technology does D@RE use?

Answer 26

RSA Embedded Data Protection Manager (eDPM)

set and forget key management