Aktív témák

• #25 Break senior tag thaler2 #24

  2005-05-24 11:00:09 #25

  Összes hozzászólása itt Válaszok az összes hozzászólására itt Válaszok erre a hozzászólásra

  Privát üzenet küldése

  

  Break

  senior tag

  válasz thaler2 #24 üzenetére

  ECC =
  (Error Checking/ Correcting Code) A method used to check the integrity of data stored in memory . ECC memory improves data integrity by detecting errors in memory and is more advanced than parity because it can detect both multiple-bit errors and single-bit errors (parity only detects single-bit errors). ECC is typically found in high-end PCs and file servers where data integrity is key. An ECC scheme capability is partially determined by the sophistication of the ''systematic code'' employed. The systematic code is like a reference table that the memory system uses to determine whether or not the memory has returned the correct data. Every time data is stored in memory, this code is responsible for the generation of check bits which are stored along with the data. When the contents of a memory location is referenced, the ECC memory logic uses the check bit information and the data itself to generate a series of ''syndrome bits''. If these syndrome bits are all zeros, then the data is valid and operation continues. If any bits are ones, then the data has an error and the ECC memory logic isolates the errors and reports them in the operating system. In the case of a correctable error, the ECC memory scheme can detect single and double bit errors and correct single bit errors.
  
  Összegezve: Ellenörző, hibajavító funkció
  
  Registered Memory =
  Registers delay memory information for one clock cycle to ensure all communication from the chipset is collected by the clock edge, providing a
  controlled delay on heavily loaded memories
  
  Összegezve : (na ennyire nem tudok angolul )
  
  a REG ECC ramok CSAK A64-es és serrver platformokon működnek.
  
  
  (a leírások a http://www.simmtester.com -ról valók)

Aktív témák