Roku HD110 User Guide - Page 90

Advanced Topics, Selecting Compact Flash cards, Avoiding CF/SD card corruption due to read fatigue

Get Roku HD110 PDF manuals and user guides View all Roku HD110 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 90 highlights

Chapter 8 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: • Transcend • PQI • 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 84 • •

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
84
•
•
•
•
•
•
Chapter 8
• • • • • •
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:
•
Transcend
•
PQI
•
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