Ultra3/ 160M SCSIUltra3/ 160M SCSIThe Future of SCSI Technology

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Why Ultra3?Why Ultra3?

Availability Scalability Reliability Manageability Performance Investment Protection

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What is Ultra3?What is Ultra3?

Announced in September 1998 by the SCSI Trade Association

Wide industry support (including Mylex):"Mylex is pleased to be an active participant in the

STA's effort to advance SCSI's capabilities," said Eric Herzog, Mylex vice president of market development. "We're confident that Ultra3 SCSI's dramatic improvements in performance, manageability and flexibility will be well-received by the marketplace, and we look forward to incorporating this new technology into our mid-range and high-end RAID controller product families."

Outlined in specification standard SCSI SPI-3 Next Generation of Ultra SCSI

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What is Ultra3?What is Ultra3?

Fully backward compatible with Ultra2 LVD No change to cable, backplane, terminator infrastructure

A change in all this infrastructure WAS necessary when going from Ultra 1 to Ultra2 but is NOT necessary when going from Ultra2 to Ultra3

Same cable, backplane, terminator infrastructure for Ultra3 and Ultra2

Compatible with Pre-Ultra SCSI also Protects investment in SCSI and moves interface

forward

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What is Ultra3?What is Ultra3?

Ultra 160/m announced as a subset of Ultra3 by Quantum and others (including Mylex) in September 1998:

"Mylex is committed to providing the latest in leading edge RAID technology to its OEM, distributor, and reseller partners. With Ultra 160/m, Mylex will continue to offer our customers the highest levels of performance, reliability, and compatibility. At the same time, Mylex's customers will be protecting their investment in legacy SCSI technology. As the industry moves forward with Ultra 160/m, Mylex will be right there."

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What is Ultra3?What is Ultra3?

Per the SCSI Trade Association Announcement of September 1998 Ultra3 SCSI products can include ANY of the following features:

Double edge clocking

CRC (Cyclic Redundancy Check)

Domain validation

Packetization

QAS (Quick Arbitration and Select) -

OR

OR

OR

OR

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Double Edge ClockingDouble Edge Clocking

Double edge clocking - transition clocking doubles data throughput to 160 megabytes per second

Sends two pieces of data per clock pulse instead of one, thereby doubling the throughput without increasing the interface clock rate

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CRC (Cyclic Redundancy Check)CRC (Cyclic Redundancy Check)

Cyclic redundancy check will improve data-transmission reliability via an enhanced error-catching scheme

Extra data protection for marginal cable plants, and external devices. Best way to ensure data protection during hot plugging. Same proven CRC used by FDDI, Ethernet, and Fibre Channel

detects:

All single bit errors All double bit errors, All odd number of errors All burst errors up to 32-bits long Has a ~2-32 rate of undetected random error patterns

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Domain ValidationDomain Validation

Domain validation detects the configuration of the SCSI bus and automatically tests and adjusts the SCSI bus transfer rate to optimize interoperability

Intelligently tests the network before completing negotiation If some part of the network is unable to operate at requested speed,

testing will discover this before putting customer data reliability at risk Reduces Total Cost of Ownership

Reducing service calls for unanticipated configuration problems Saves on call center support resources Helps alleviate end-user frustration by making drives add easy

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PacketizationPacketization

Reduces protocol overhead and provides scaleable performance improvements with speed

Provides faster transfer of command and status information and the ability to transfer multiple commands and multiple threads of data per connection cycle

Commands, messages, and status are all sent at data rate speeds

Transfers can be streamed within a connection

Packet structure is similar to Fibre Channel

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QAS (Quick Arbitration QAS (Quick Arbitration Select)Select)

Provides faster arbitration to reduce disconnect and reconnect time on the SCSI bus

Faster arbitration than today’s

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Disk Drive Manufactures in 2 CampsDisk Drive Manufactures in 2 Camps

“Full” Ultra3 camp includes ALL the following features:

Double edge clocking CRC Domain Validation Packetized QAS

Ultra 160/m camp includes a subset of “full” Ultra3 features:

Double edge clocking CRC Domain Validation

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Disk Drive Partners’ StrategyDisk Drive Partners’ Strategy

Seagate Full Ultra3 implementation Shipping Q1/Q2 of 2000

Fujitsu Full Ultra3 implementation Shipping Q1/Q2 of 2000 Might do earlier U160/m release if see need and if

Quantum looks to be gaining ground IBM - doing both

Ultra 160/m in late 1999 Full Ultra3 implementation Shipping Q1/Q2 of 2000

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Disk Drive Partners’ Strategy Disk Drive Partners’ Strategy (cont’d)(cont’d)

Quantum Ultra 160/m implementation Shipping Q2/Q3 of 1999

Western Digital - late to market Full Ultra3 implementation Shipping Q2/Q3 of 2000

Hitachi Have not engaged them yet in discussions - TBD

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Why does Mylex care about Why does Mylex care about Ultra3?Ultra3?

SCSI’s significance for RAID SCSI’s significance in ALL segments of the Server

Market Important technological advances that will keep SCSI

at the forefront of Server architecture

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SCSI Market SegmentationSCSI Market Segmentation

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Hard Disk Interface Market TrendsHard Disk Interface Market Trends

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Mylex’s StrategyMylex’s Strategy

Support for both Ultra3 and Ultra 160/m Support for all features of Ultra3 except QAS by end of

1999 Support for QAS - TBD

Full product line Externals

FL3 FL3X

PCI Big Apple Ultra3 Leopard 2 channel Leopard 1 channel

Product start Beta’s in July ‘99 and ship Oct. ‘99 Working on pull in strategy for some products - TBD

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Mylex and Ultra3Mylex and Ultra3

World’s

Supplier

of