BrightSign Roku Compact Podręcznik Użytkownika Pobierz pdf (Strona 90)

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Chapter 8

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Advanced Topics

Selecting Compact Flash cards

When you use BrightSign, your content and scripts resides on a Compact Flash (CF) or Secure

Digital (SD) card. Although the CF/SD interface is standardized, there are a wide range of

performance, compatibility, and reliability issues among CF/SD card brands and models.

BrightSign strongly recommends that you use

industrial rated

CF/SD cards with BrightSign. We

have tested industrial rated CF/SD cards from the following brands:

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Transcend

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PQI

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Simpletech

Avoiding CF/SD card corruption due to read fatigue

If you fail to use an industrial CF/SD card, the files on the CF/SD card may become corrupt after a

period of time. This is due to the fact that CF/SD cards use NAND flash memory chips that are

rated for a certain number of

block reads

before a particular block may develop a read error. Some

types of NAND flash are more susceptible to read errors than others. For example, multi-level

flash chips are much more susceptible to read errors than single level flash chips. CF/SD card

controllers (the chip inside the CF/SD card that controls the flash memory and interfaces with the

CF/SD connector) are responsible for eliminating these read errors as well as write errors through

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BrightSign Roku Compact Podręcznik Użytkownika Strona 90