Ltl-a Parity Error Detected
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Catalyst 6500 Series SwitchesTroubleshoot and AlertsTroubleshooting TechNotes Parity Errors Troubleshooting Guide what is parity error Download Print Available Languages Download Options PDF (259.4 KB) parity error cisco View with Adobe Reader on a variety of devices Updated:Jul 15, 2013 Document ID:116135 Document parity error fix ID: 116135 Updated: Jul 15, 2013 Contributed by Shawn Wargo, Cisco Engineering. Download PDF Print Feedback Related ProductsCisco Catalyst 6500 Series
Ltl 2 Ltl_parity_check
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 that help you system returned to rom by processor memory parity error at pc 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 known as a parity error.Such memor
in random access memory, and the subsequent comparison of the stored and the computed parity to detect whether a data error has occurred. The parity bit was originally stored imprecise data parity error in additional individual memory chips; with the introduction of plug-in DIMM, SIMM, etc. modules,
High Correctable Ecc Error Rate Detected Cisco
they became available in non-parity and parity (with an extra bit per byte, storing 9 bits for every 8 bits
Parity Error Detected In Vram
of actual data) versions. Contents 1 History 2 Memory errors 3 Error correction 3.1 ECC type RAM 4 See also 5 References History[edit] Early computers sometimes required the use of parity RAM, and http://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/116135-trouble-6500-parity-00.html parity-checking could not be disabled. A parity error typically caused the machine to halt, with loss of unsaved data; this is usually a better option than saving corrupt data. Logic parity RAM, also known as fake parity RAM, is non-parity RAM that can be used in computers that require parity RAM. Logic parity RAM recalculates an always-valid parity bit each time a byte is read from memory, instead http://en.wikipedia.org/wiki/RAM_parity of storing the parity bit when the memory is written to; the calculated parity bit, which will not reveal if the data has been corrupted (hence the name "fake parity"), is presented to the parity-checking logic. It is a means of using cheaper 8-bit RAM in a system designed to use only 9-bit parity RAM. Memory errors[edit] In the 1970s-80s, RAM reliability was often less-than-perfect; in particular, the 4116 DRAMs which were an industry standard from 1975 to 1983 had a considerable failure rate as they used triple voltages (-5, +5, and +12) which resulted in high operating temperatures. By the mid-1980s, these had given way to single voltage DRAM such as the 4164 and 41256 with the result of improved reliability. However, RAM did not achieve modern standards of reliability until the 1990s. Since then errors have become less visible as simple parity RAM has fallen out of use; either they are invisible as they are not detected, or they are corrected invisibly with ECC RAM. Modern RAM is believed, with much justification, to be reliable, and error-detecting RAM has largely fallen out of use for non-critical applications. By the mid-1990s, most DRAM had dropped parity checking as manufacturer
Shoes & Jewelry Women Men Girls Boys Baby Collectibles & Fine Art Computers Courses Credit and Payment Cards Digital Music Electronics Gift Cards Grocery & Gourmet Food Handmade Health, Household & Baby Care Home & Business Services http://www.amazon.com/Non-ECC-CL11-other-similar-products/forum/Fx2TWLO1ZBTZ6D9/Tx1GCY05JMIDR3R/1?asin=B0089JIDUI Home & Kitchen Industrial & Scientific Kindle Store Luggage & Travel Gear Luxury Beauty Magazine Subscriptions Movies & TV Musical Instruments Office Products Patio, Lawn & Garden Pet Supplies Prime Pantry Software Sports & Outdoors Tools https://en.wikipedia.org/wiki/RAM_parity & Home Improvement Toys & Games Vehicles Video Games Wine Go Departments Hello. Sign inYour AccountSign inYour AccountTry PrimeListsCart0 Your Amazon.comToday's DealsGift Cards & RegistrySellHelp Kingston ValueRAM 8GB 1600MHz... $48.97 Hi, what does it mean "Non-ECC CL11"? parity error and Why other similar products does not say that? [UPDATED] asked by MK on July 22, 2013 The answer body is empty. Please add text to it. Sort: Most Helpful first | Newest first | Oldest first Showing 1-2 of 2 answers A "Short for Error-Correcting-Code memory, a type of memory that includesspecial circuitry for testing and accuracy of data as it passes in andout of memory."Most home computers use standard memory, while ECC parity error detected memory is used forcommercial applications where data integrity is very critical.When buying memory, the only time you will see ECC mentioned is if thememory *is* ECC, not if it is *not* ECC. ECC memory is also moreexpensive since it has an extra memory chip and circuitry to do theerror correction. Basically, the CL tells you how many clock cycles it takes to perform an action, so the less the better. "Short for Error-Correcting-Code memory, a type of memory that includesspecial circuitry for testing and accuracy of data as it passes in andout of memory."Most home computers use standard memory, while ECC memory is used forcommercial applications where data integrity is very critical.When buying memory, the only time you will see ECC mentioned is if thememory *is* ECC, not if it is *not* ECC. ECC memory is also moreexpensive since it has an extra memory chip and circuitry to do theerror correction. Basically, the CL tells you... » Read More "Short for Error-Correcting-Code memory, a type of memory that includesspecial circuitry for testing and accuracy of data as it passes in andout of memory."Most home computers use standard memory, while ECC memory is used forcommercial applications where data integrity is very critical.When buying memory, the only time you will see ECC mentioned is if thememory *is* ECC, not if it
in random access memory, and the subsequent comparison of the stored and the computed parity to detect whether a data error has occurred. The parity bit was originally stored in additional individual memory chips; with the introduction of plug-in DIMM, SIMM, etc. modules, they became available in non-parity and parity (with an extra bit per byte, storing 9 bits for every 8 bits of actual data) versions. Contents 1 History 2 Memory errors 3 Error correction 3.1 ECC type RAM 4 See also 5 References History[edit] Early computers sometimes required the use of parity RAM, and parity-checking could not be disabled. A parity error typically caused the machine to halt, with loss of unsaved data; this is usually a better option than saving corrupt data. Logic parity RAM, also known as fake parity RAM, is non-parity RAM that can be used in computers that require parity RAM. Logic parity RAM recalculates an always-valid parity bit each time a byte is read from memory, instead of storing the parity bit when the memory is written to; the calculated parity bit, which will not reveal if the data has been corrupted (hence the name "fake parity"), is presented to the parity-checking logic. It is a means of using cheaper 8-bit RAM in a system designed to use only 9-bit parity RAM. Memory errors[edit] In the 1970s-80s, RAM reliability was often less-than-perfect; in particular, the 4116 DRAMs which were an industry standard from 1975 to 1983 had a considerable failure rate as they used triple voltages (-5, +5, and +12) which resulted in high operating temperatures. By the mid-1980s, these had given way to single voltage DRAM such as the 4164 and 41256 with the result of improved reliability. However, RAM did not achieve modern standards of reliability until the 1990s. Since then errors have become less visible as simple parity RAM has fallen out of use; either they are invisible as they are not detected, or they are corrected invisibly with ECC RAM. Modern RAM is believed, with much justification, to be reliable, and error-detecting RAM has largely fallen out of use for non-critical app