Are Two Drives Better than One? - Flash Memory Summit RPM performance advantage in dual drive configurations Dual drive can outperform single SSD Dual drive maintains performance advantage

© 2013, HGST, a Western Digital company Santa Clara, CA – August 2013

Are Two Drives Better than One? Lenny Sharp Director, Client HDD Marketing HGST

© 2013, HGST, a Western Digital company 2 HGST Confidential

Form Factors Driving Proliferation of Storage Options

Must balance FF, Performance & Cost

© 2013, HGST, a Western Digital company 3 Santa Clara, CA – August 2013

Mobile Storage Options (2H 2013)

mSATA M.2 5mm 2.5” 7mm 2.5” 9.5mm 2.5”

Cache SSD 8-32GB 8-32GB

SSD 128-512GB 128-512GB 128-960GB

SSHD 500GB 500GB – 1TB 750GB – 1TB

HDD 320-500GB 250GB – 1TB 500GB – 1.5TB


One Size Does NOT Fit All


Capacity Forecasted to Remain Relevant

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

2012 2013 2014 2015 2016 2017

<=3TB

2TB

1.5TB

1TB

750GB

640GB

500GB

320GB

<=250GB

IDC March 2013


Notebook Storage – Performance Options

SSD

HDD & NVM

HDD

HDD + SSD Cache

SSHD

Very high cost Various form factor options Best performance

Limited to the premium notebook segment only

Meets Intel’s Ultrabook specification

Does not meet Intel’s Ultrabook specification, but can deliver cost effective ‘Thin & Light’ experience or higher capacity

Sourcing and configuration flexibility across HDD and SSD Cache

Chipset and software solutions available to seamlessly integrate the two drives

Initial implementations did not deliver on form-factor and price/performance

Improved generation of drives just launched

Best cost Proven product reliability and suppliers 7mm thin option

Clear choice for mainstream and entry-level notebooks

Several drive options are available to improve the system experience, including boot, application start-up, resume from sleep and battery life


Cost of Mobile Storage Options

1.17

0.86

0.78

0.16 0.12 0.12 0.14

0.08

-

0.20

0.40

0.60

0.80

1.00

1.20

128GB SSD 256GB SSD 512GB SSD 500GB SSHD 1TB SSHD 500GB 5400 HDD

500GB 7200 HDD

1TB 5400 HDD

$/GB

Source: newegg.com August 12, 2013

HDD Based Options offer superior GB/$ value


Hybrid Storage Solutions SSHD vs. Dual Drive

Mobile SSHD Mobile

Dual Drive: HDD + SSD

Advantages Flexibility to mix and match “best of breed” HDD and

SSD for performance and capacity points Easy multi-sourcing of HDD and SSD SKU leverage (3x3=9) Caching software can leverage CPU resources and file

awareness to deliver better performance Potential performance benefit of Independent and

scalable interfaces

Advantages Less complexity leveraged qualification

Potential for cost savings of a more integrated solution

HDD form factor

No space required for mSATA in system

Can be used instead of HDD in any system

Common Advantages: Much higher performance than HDD alone, approaching SSD for certain applications, can meet Ultrabook spec;

Equivalent cost structure, BOM dominated by NAND, plus controller & interface

Caching Software SATA

SATA SATA


SSHD vs. Dual-drive Architecture

SSHD HDD NAND

SSD

Applications Applications

OS OS

Cache accelerator

DRAM DRAM


SSHD vs. Dual-drive Architecture

Pros: • Only one I/F port needed • No SW installation needed • Transparent upgrade to the system

Cons: • Cache management shares embedded CPU • Requires dedicated DRAM: For running

filtering and classification algorithms and maintaining frequency tables

• Page faults may still incur ~10 ms latencies • Increased firmware complexity:

– More complex reliability validation and data integrity verification

• Makes it hard for systems designers to optimize since it decreases control and adds a level of indirection

Pros: • Cache accelerator software has DRAM

access, sharing it with the rest of the systems • SSD may be used as: (1) a separate storage

tier, (2) as a 2-nd tier cache to DRAM, or (3) even both

• Cache accelerator runs on x86 CPU and can implement compression & de-duplication

• Accelerator has more application and OS semantics to maneuver: choice of write back/write-through and can also keep all data on primary storage (HDD)

• More flexibility in choice of algorithms and settings

Cons: • Requires software installation • Requires one additional I/F port


Hybrid Storage Solutions SSHD vs. Dual Drive

Mobile SSHD Mobile

Dual Drive: HDD + SSD

Caching Software SATA

SATA SATA

WD

Seagate Toshiba

3 options, 3 distinct architectures Choice of standard components

5400 RPM HDD

7200 RPM HDD

250GB-1.5TB

5,7 or 9.5mm

8, 16, 24 or 32 GB cache

mSATA, mSATA mini or M.2

Intel or 3rd party SW driver

Limited number of capacity and form factor options

Limited cache size options 5400 RPM only


PC Mark Vantage 64 HDD Test

Ultrabook spec

Core i5 Ultrabook, Win7

7200 RPM performance advantage in dual drive configurations

Dual drive can outperform single SSD

Dual drive maintains performance advantage over hybrid

2 > 1

Source: HGST Test Results

-

10,000

20,000

30,000

40,000

50,000

60,000

70,000

80,000

Z5K500 HDD Z7K500 HDD Z5K500 HDD+32GB SSD+Intel

iSRT

Z7K500 HDD+32GB SSD+Intel

iSRT

Z5K500 HDD+32GB

SSD+NVELO

Z7K500 HDD+32GB

SSD+NVELO

Plextor 256GB SSD

Seagate SSHD 500GB

Seagate SSHD

1000GB

Toshiba 750GB Hybrid


PC Mark 7 Storage Test

Dual Drive with 7200 RPM HDD Nearly as fast as SSD Up to 40% faster than SSHDs

Core i5 Ultrabook, Win7 Source: HGST Test Results

-

1,000

2,000

3,000

4,000

5,000

6,000

Z5K500 HDD Z7K500 HDD Z5K500 HDD+32GB SSD+Intel

iSRT

Z7K500 HDD+32GB SSD+Intel

iSRT

Z5K500 HDD+32GB

SSD+NVELO

Z7K500 HDD+32GB

SSD+NVELO

Plextor 256GB SSD

Seagate SSHD 500GB

Seagate SSHD

1000GB

Toshiba 750GB Hybrid


Windows 8 Restart

41.4

30.9 29.8

26.4

18.5

27.4

35.2

42.4

-

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

Z5K500 HDD Z5K500+16GB Z5K500+32GB 7K1000+16GB Plextor SSD Toshiba Hybrid Seagate 1TB SSHD

Seagate 500GB SSHD

Seconds

Core i5 Ultrabook, Win8 Pro Source: HGST Test Results


PC Mark Vantage 64 HDD Test

-

5,000

10,000

15,000

20,000

25,000

30,000

35,000

40,000

Z5K500+8GB Z7K500+8GB Z5K500+16GB Z7K500+16GB Plextor SSD Seagate SSHD Toshiba Hybrid



-

1,000

2,000

3,000

4,000

5,000

6,000

Z5K500+8GB Z7K500+8GB Z5K500+16GB Z7K500+16GB Plextor SSD Seagate SSHD Toshiba Hybrid

PC Mark 7 Storage Test



Sysmark Application Benchmark

126.91 130.07 132.28

129.18 131.17 132.6 130.57

0

20

40

60

80

100

120

140

Jaguar-B King 1.5TB (5400 RPM)

NO SSD


32GB Cache*


64GB Cache

Jaguar 1C 500GB (7200 RPM) NO

SSD

Jaguar 1C 500GB (7200 RPM) 32GB

Cache*


Cache

Seagate SSHD 1TB

Overall Performance *

* Synthesis of Office productivity, Media creation, Web development Data/Financial analysis, 3D modeling & System management Source: HGST Test Results


Sysmark Application Benchmark

126.91

130.07

132.28

129.18

131.17

132.6

130.57

124

125

126

127

128

129

130

131

132

133

134


NO SSD


32GB Cache*


64GB Cache

Jaguar 1C 500GB (7200 RPM) NO

SSD


Cache*


Cache

Seagate SSHD 1TB

Overall Performance *

* Synthesis of Office productivity, Media creation, Web development Data/Financial analysis, 3D modeling & System management Source: HGST Test Results


The Question

Are two drives better than one?

…it depends


Range of Mobile Storage Options

5400RPM HDD

7200RPM HDD

SSHD

5400RPM HDD + Cache SSD

7200RPM HDD + Cache SSD

SSD

Price

Per

form

ance


“Sweet Spot” Solution

Performance

Integration Cost


Forward Looking Statement

This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including statements concerning: growth opportunities in the various storage markets as well as the industry as a whole, including growth in units shipped, areal density and content stored; HGST’s position within the industry; the increasing diversity of storage demand; and the outlook for the storage industry, HGST and its customers. These forward-looking statements are based on management’s current expectations and are subject to risks and uncertainties that could cause actual results to differ materially from those expressed or implied in the forward-looking statements, including the impact of continued uncertainty and volatility in global economic conditions; supply and demand conditions in the hard drive industry; uncertainties concerning the availability and cost of commodity materials and specialized product components; actions by competitors; unexpected advances in competing technologies; uncertainties related to the development and introduction of products based on new technologies and expansion into new data storage markets; business conditions and growth in the various hard drive markets; pricing trends and fluctuations in average selling prices; and compliance with regulatory conditions imposed on us by the Chinese Ministry of Commerce. More information about the other risks and uncertainties that could affect our business are listed in our filings with the Securities and Exchange Commission (the “SEC”) and available on the SEC’s website at www.sec.gov, including our Quarterly Report on Form 10-Q filed with the SEC on May 3, 2013, to which your attention is directed. The forward-looking statements speak only as of the date hereof. We do not intend, and we undertake no duty, to update these forward-looking statements to reflect subsequent events or circumstances.

Documents

Are Two Drives Better than One? - Flash Memory Summit RPM performance advantage in dual drive configurations Dual drive can outperform single SSD Dual drive maintains performance advantage