1. Ultra3/ 160M SCSI The Future of SCSI Technology

2. 2 PP320299.ppt Why Ultra3?  Availability  Scalability  Reliability  Manageability  Performance  Investment Protection

3. 3 PP320299.ppt 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

4. 4 PP320299.ppt 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

5. 5 PP320299.ppt 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."

6. 6 PP320299.ppt 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

7. 7 PP320299.ppt Double 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

8. 8 PP320299.ppt 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

9. 9 PP320299.ppt Domain 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

10. 10 PP320299.ppt Packetization  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

11. 11 PP320299.ppt QAS (Quick Arbitration Select)  Provides faster arbitration to reduce disconnect and reconnect time on the SCSI bus  Faster arbitration than today’s

12. 12 PP320299.ppt Disk 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

13. 13 PP320299.ppt Disk 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

14. 14 PP320299.ppt Disk Drive Partners’ Strategy (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

15. 15 PP320299.ppt Why does Mylex care about 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

16. 16 PP320299.ppt SCSI Market Segmentation

17. 17 PP320299.ppt Hard Disk Interface Market Trends

18. 18 PP320299.ppt Mylex’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

19. 19 PP320299.ppt Mylex and Ultra3 World’s Supplier of