NAS (network attached storage) &
SAN (storage area network) Solutions

Solid State Disk :

Why SSDs? 

SSDs offer faster data access and longer MTBF, characteristics that make them the ideal solution for mission critical and industrial applications. Mechanical disks are vulnerable to break down in sever industrial environments. Solid state disks give you faster and more efficient operation, a longer life span, and a lower risk of breakdown or data loss.

Flash/RAM/ROM disks appear in applications that demand a large storage capacity, easy memory expansion, complete DOS compatibility and security. Compared to mechanical disks, SSD withstand more sever conditions and perform read/write operations much faster. Watchdog timers make standalone or unmanned operations much easier to manage because they can automatically trigger resets or reboots. Disk Cards also work well in high security environments because they are entirely closed within your PC and are therefore far more tamper-proof than disk drives.

Why Not SSD?

At the moment, the following sizes are available:

• Flash SSDs: 128K; 256K; 512K; 1MB; 2MB; 4MB; (8MB available for corporate customers only).
• RAM SSDs: 128K; 512K; 1MB; (2MB available for corporate customers only).

Flash SSD :

Flash SSDs do not require any form of battery power to keep data secure when they are out of the Psion. However, deleting or replacing information on a Flash SSD is like crossing out notes in a paper book, the information is gone, but the space is still occupied until you format the disk.

So you should use Flash SSDs for storing information that you do not often change. However, Data and Agenda files are designed to operate well if stored on a Flash SSD as these applications save only the changes and additions made to a file, not the entire file, if a file is modified.

Eventually a Flash SSD will become full. You will then need to either compress the disk, or copy the data that you wish to keep to another disk, then format the disk to make it blank again, and copy the information back.

You can format a flash disk at least 10,000 times. This is equivalent to formatting an SSD once a week for almost 200 years.

Type II Flash SSD :

These are a newer type of Flash SSD that tend to have larger capacities. They require a small piece of software to be installed onto a Series 3 before they can be used there. This software is supplied as standard with every new Flash II disk. Once it has been installed, the disk may be used in exactly the same way as any other SSD.

Series 3a, 3c and Siena models do not require any software to be installed to use Type II Flash SSDs.

RAM SSD :

RAM SSDs use an internal battery to keep data secure when they are out of the Psion. (While inside the Psion, they are powered by the Psion's batteries.) When you delete or replace information on a RAM SSD, the space that was used is automatically freed for re-use. So you can use RAM SSDs for all kinds of information, including files that you frequently change, for example Agenda files. You need to format new RAM SSDs before using them for the first time.