background image

 
Markets

  

 

The potential markets for 3ware’s TwinStor technology are extremely wide-ranging and should be receptive to improvements 
in performance and reliability. In the home market where cost is extremely important, the TwinStor technology will be 
important because many users lack the expertise and tools to back up data regularly or to recover the operating system, 
applications, and data after a failure. This safeguard, coupled with the ability to “future-proof” the system, may be attractive 
to a large portion of the home market 

 

The "SOHO" (small office, home office) market is a natural utilization of TwinStor technology. A disk failure could destroy 
valuable records and close a small business until the system is recovered. Even if the business never has a disk failure, the 
peace of mind and increased performance would justify the cost of the second drive and switch. 

 

3ware’s TwinStor technology is especially strong in applications which are read intensive and which have a mix of small and 
large object sizes, the typical transactions performed by a Web server. Systems with the TwinStor technology can be 
effective in the Web hosting environment and will often show better overall performance than any other way of utilizing a 
second drive, with the added bonus of fault tolerance. 

 

On-line transaction processing (OLTP) is another area where systems utilizing TwinStor technology will benefit. In the past, 
OLTP transaction sizes have been very small, with records of just a few hundred bytes, but the trend is definitely towards 
richer transactions with image, video and audio content. For small, large, or mixed transactions, TwinStor technology 
provides a good solution at an extremely low cost per transaction. Applications may range from point-of-sale controllers to 
back-end database systems. 

 

High streaming rates are required in systems that process real-time video and audio. 3ware’s TwinStor technology provides 
this streaming bandwidth and the backup to prevent loss of data when a disk fails. The combination of these requirements 
makes the TwinStor technology a good fit for a variety of applications. 

 

Conclusion

  

 

3ware’sTwinStor technology provides a fault-tolerant solution that protects valuable data and improves read performance. 
This benefits a wide range of computer systems including home PCs, small business systems, on-line transaction point-of-
sale controllers, and streaming real-time audio/video processing platforms. The redundancy of data replaces other more 
costly data backup solutions and eliminates the dilemma that often arises when a drive failure occurs prior to the archival of 
irreplaceable data. 

 

Given these benefits of data protection and performance enhancement, we are likely to see an increase in the deployment of 
multiple drive computer systems that make use of TwinStor technology. 

 

 
 
 
 

Summary of Contents for TwinStor

Page 1: ...latency and facilitates streaming Adaptive algorithms increase performance to the extent that the sequential read bandwidth approaches that of striped RAID 0 drives and the random transaction rate ex...

Page 2: ...porate desktop PCs and small servers are often backed up automatically over a network The total cost of this backup strategy can be quite high when all costs hardware and software increased network ca...

Page 3: ...s kept to a minimum 3ware s new algorithms for intelligent performance optimization achieve this in several ways Profiling disk drives to obtain drive specific parameters needed for optimal performanc...

Page 4: ...eliminates an entire revolution of the disk that would otherwise be necessary to get to the position of the data Reading data sequentially can be orders of magnitude faster than reading the data with...

Page 5: ...ize is increased it eventually passes the point where the amount of data being skipped is equal to one track At this point the data rate increases sharply because there is almost no time wasted for th...

Page 6: ...SCSI drive is faster than the ATA drive The street price of the SCSI drive is more than double that of the ATA drive making the TwinStor solution less expensive by about 10 Escalade controller prices...

Page 7: ...RPM SCSI drive shows similar overall performance and much better streaming read performance at a much lower cost Figure 4 RAID 1 to TwinStor Comparison Figure 5 shows a four drive SCSI RAID 5 system p...

Page 8: ...ocessing OLTP is another area where systems utilizing TwinStor technology will benefit In the past OLTP transaction sizes have been very small with records of just a few hundred bytes but the trend is...

Page 9: ...1 1 761 SCSI Seagate ATA Quantum Barracuda RAID 1 KA Twin drives Capacity 9 1 GB 9 1 GB Street Price 750 375 2 336 168 2 GB 1000 12 1 27 1 Sequential Read 18 6 MB s 32 1 MB s Random 2k Read 201 I Os s...

Page 10: ...Meg SDRAM Windows NT 4 0 w Service Pack 5 ATI Rage Pro Turbo w 8Meg 1024x768 64K Colors NEC 40X IDE CD ROM ATA Quantum Fireball Plus KA 9 1 G and 18 2 G 7200 RPM 3ware Disk Switch 4 Controller SCSI Se...

Reviews: