Perity Error
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Catalyst 6500 Series SwitchesTroubleshoot and AlertsTroubleshooting TechNotes Parity Errors Troubleshooting parity error fix Guide Download Print Available Languages Download Options PDF (259.4 parity error definition KB) View with Adobe Reader on a variety of devices Updated:Jul 15, 2013 Document parity error cisco ID:116135 Document ID: 116135 Updated: Jul 15, 2013 Contributed by Shawn Wargo, Cisco Engineering. Download PDF Print Feedback Related ProductsCisco Catalyst parity error 4x4 6500 Series Switches ContentsIntroductionBackgroundSoft ErrorsHard ErrorsCommon Error MessagesProcessorRAMASICLatest AdvancementsProcessorRAMASICSoftwareMSFC IBC Reset6700 Series 'Single-Bit Parity Error' ResetRecommendationsSoft Errors (SEU)Environmental AuditLatest Firmware (Rommon)Thumb ScrewsHard Errors (Malfunction)Hardware (MTBF and EOL) AuditHardware DiagnosticsRelated Cisco Support Community DiscussionsIntroductionThis document describes soft and hard parity errors, explains common error messages, and recommends methods
Parity Error 5x5
that help you avoid or minimize parity errors. Recent improvements in hardware and software design reduce parity problems as well. BackgroundWhat is a processor or memory parity error?Parity checking is the storage of an extra binary digit (bit) in order to represent the parity (odd or even) of a small amount of computer data (typically one byte) while that data is stored in memory. The parity value calculated from the stored data is then compared to the final parity value. If these two values differ, this indicates a data error, and at least one bit must have been changed due to data corruption.Within a computer system, electrical or magnetic interference from internal or external causes can cause a single bit of memory to spontaneously flip to the opposite state. This event makes the original data bits invalid and is
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Parity Error Checking
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ProductsHomearound the homeproductivityHow to Fix a Memory Parity ErrorHow to Fix a Memory Parity ErrorBy Dan StoneMemory parity errors can be caused by failing hardware or outside elements disrupting how computer memory functions. Fixing parity errors involves removing the outside cause or failing hardware. A memory parity error means that one https://www.techwalla.com/articles/how-to-fix-a-memory-parity-error or more stored data values carries a different value when it's recalled than http://www.tech-faq.com/nmi-parity-check-memory-parity-error.html when it was stored. According to Cisco, parity errors are a type of data corruption. Parity errors offset the charge value and can bring back invalid or incorrect commands for the computer.Correct Electrical Source ProblemsResolving parity errors may be as simple as connecting the computer to a different power outlet parity error or replacing the surge protector. The computer's motherboard and power supply have built-in capacitors that can compensate for voltage irregularities, but the component is unable to compensate for poor power continuity. Additionally, the outlet and surge protector should be properly grounded to prevent power-surge damage to the random-access memory, which can cause parity errors.Remove ESD and EMI SourcesElectrostatic discharge and electromagnetic interference parity error fix from nearby objects can cause infrequent, or "soft," parity errors. You can work around ESD and EMI by increasing the distance between the computer and the disruptive source. Power cables, power distribution units, lighting systems, power supplies and power generators are common ESD and EMI sources. Additionally, nearby magnets can cause parity errors.Adjust RAM TimingIncorrect RAM timings can overload the capacitors and create parity errors in a computer when the CPU can't access the RAM fast enough, according to Microsoft. Timing-caused parity errors do not always show up when Windows first loads but rather several minutes into operation. Modern computers are able to work with RAM modules with different ratings by running at the slowest module's fastest speed, which means memory parity errors from bad RAM timing are usually caused by user tampering. You can resolve the problem by returning the RAM timing to the initial setting. Alternatively, you can load the "Safe" or "Default" BIOS settings to troubleshoot.Remove or Replace RAM ModulesIf you recently installed new RAM in the computer, try removing the new modules -- replace new modules with old ones if needed
hangs or stops responding during the Windows start-up process, and may be the result of a number of hardware or hardware configuration problems. What does the NMI Parity Check/Memory Parity Error Look Like? A number of error codes can be displayed when the error occurs. These include: NMI: Parity Check/Memory Parity Error, NMI: Bus Timeout, NMI: Software NMI generated, NMI: Eisa IOCHKERR board x, NMI: Channel Check/IOCHK, or NMI: Fail-safe timer The error codes typically start with the “*** Hardware Malfunction” message and a display message indicating that the computer or system has been “halted” follows. Why does the NMI Parity Check/Memory Parity Error Occur? The NMI Parity Check/Memory Parity error typically occurs if a computer hardware component is damaged, malfunctions, or if an incompatible driver is installed on the computer. How to Fix the NMI Parity Check/Memory Parity Error Most hardware problems that trigger this error involve the computer's RAM, motherboard, cache memory, or a hardware adapter on the computer. The following are troubleshooting steps that can be taken to identify the cause of the error: Verify Your Computer's Memory Step 1 – Remove any new RAM modules that have been installed on the computer. Step 2 – Restart the computer to see if the error message continues to be displayed. Step 3 – If the error is eliminated, then replace the RAM modules that were installed. If it persists, repeat the process but only leave the minimum amount of RAM necessary to boot the computer in order to determine if the computer has faulty RAM. Step 4 – Replace the faulty RAM modules if they are the source of the problem. The Microsoft RAM diagnostic tool found at: http://oca.microsoft.com/en/windiag.asp may also be used in order to help identify faulty computer modules. Verify the Adapters on the Computer Step 1 – Remove all adapters that are not required to run or start the computer. Most Windows computers can be run with only the video and drive subsystem controller adapters. Step 2 – Restart the computer. If the error does not appear, then the problem is one of the adapters removed in step 1. Step 3 – Reinstall one adapter at a time until the error is displayed again. This determines the adapter that was the source of the error. Visit the adapter manufacturer's website and download and install the latest version. Step 4 – Re-seat all adapter hardware cards if the error is not eliminated to ensure that this is not the cause of the problem. Verify the Computer