Motorola MC55N0 Specifications download pdf (Page 76)

4 - 10 MC55A0/MC55N0 Enterprise Digital Assistant Integrator Guide

Random Access Memory

Executing programs use RAM to store data. Data stored in RAM is lost upon a warm boot. RAM also included

a volatile file storage area called Cache Disk.

Volatile File Storage (Cache Disk)

Windows Mobile 6 memory architecture uses persistent storage for all files, registry settings, and database

objects to ensure data is retained even after a power failure. Persistent storage is implemented using Flash

memory technology which is generally slower than volatile RAM memory. In certain situations the speed of the

operation is more important than the integrity of the data. For these situations, Motorola has provided a small

volatile File Storage volume, accessed as the Cache Disk folder. Disk operations to the Cache Disk folder are

much faster than to any of the persistent storage volumes, but data is lost across warm boots and power

interruptions.

DO NOT use the Cache Disk as a method to improve application performance. Analyze applications that

perform slower in persistent storage to optimize disk access. Common areas for optimization include

minimizing the number of reads and writes to a file, removing unneeded debug logging, and minimizing file

flushing or closing files.

Persistent Storage

Windows Mobile 6 protects all data and applications from power-related loss. Because Windows Mobile 6

mounts the entire file system and registry in persistent storage (rather than using RAM), MC55 devices provide

a reliable storage platform even in the absence of battery power.

Persistent storage provides application developers with a reliable storage system available through the

standard file system and registry APIs. Persistent storage is optimized for large reads and writes; therefore,

applications reading and writing data in large chunks tend to outperform those applications reading and writing

small blocks of data. Data in persistent storage is lost upon a clean boot.

Persistent storage contains all the directories under the root directory except for Application, Cache Disk, and

Storage Card (if a storage card is installed). Persistent storage is approximately 703 MB (formatted).

Application Folder

The Application folder is a super-persistent storage that is persistent even after a clean boot. Accessing data in

the Application folder is slower than accessing persistent storage. The Application folder is used for

deployment and device-unique data. For example, network profiles can be stored in the Application folder so

that connection to the network is available after a cold boot. The Application folder is approximately 118 MB

(formatted).

Enterprise Mobility Developer Kits

The Motorola Enterprise Mobility Developer Kit (EMDK) family of products allows you to write applications that

take advantage of the capture, move and manage capabilities of the MC55. Go to the Support Central

(http://supportcentral.motorola.com) to download the appropriate developer kit.

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Motorola MC55N0 Specifications Page 76