Accelerated Logic BV
Solid State Disk from
Accelerated Logic

SSD versus Hard disk

Initial development


Performance of the Accelerator

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Accelerator - initial development

Accelerated Logic started its development in 1999 with the creation of a SRAM based solid state device. This first generation Accelerator was 128MB in size and operated in PIO mode 1. The SRAM based Accelerator proved both our architecture and our technical capabilities.

After the SRAM Accelerator the first SDRAM based Accelerator was designed. This Accelerator was physically compliant to the 5.25” form factor. Both performance and storage size increased significantly with this design. Accelerated Logic now has the capability to build Accelerators ranging in size from 128MB up to 4GB. IDE data transfer performance was increased from PIO mode 1 to PIO mode 4 and even UDMA 0. In UDMA 0 the Accelerator has a sustained data throughput of 18.1MBs.

The latest generation Accelerator is based on the 3.5” form factor and supports UDMA 33. UDMA 33 is quite a significant milestone, since the Accelerator actually transfers data at 33MBytes per second continually. This forms a sharp contrast to ordinary hard disk that are only capable of bursting data at full bandwidth for small amounts of data.

The 3.5” Accelerator is upgradeable; there is an expansion interface available. Using this interface it is possible to add extra storage capacity to the Accelerator. Using this architecture it is possible to build Accelerators of 14GB in size.


Accelerated Logic is currently working at the implementation of the UDMA 66 standard. At this stage it should be feasible to realize UDMA 66 in the 3.5” architecture.

In parallel Accelerated Logic has formed a second development team. This team has started the design of a Fibre Channel interface compatible solid state storage device. Fibre Channel is a rapidly evolving and expanding market.

For solid state storage the Fibre Channel standard is interesting for two reasons; firstly Fibre Channel supports higher bandwidth and therefore makes higher data transfer rates possible. Secondly Accelerated Logic believes that Fibre Channel will become the standard for storage area networks (SAN's).

When Accelerators can be placed in storage area networks it makes dynamic allocation of Accelerator storage capacity possible.




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