Upload or insert images from URL. Sign In. Are parity checks really needed? Followers 1. Reply to this topic Start new topic. Recommended Posts. Posted January 16, Is the parity check really needed, especially now with dual parity drives? Thank you -Py. Link to comment. JorgeB Posted January 16, I have never once had a parity check find a single error. Posted January 16, edited. Total size: 3 TB Elapsed time: 13 hours, 48 minutes Current position: 1.
HVM: Enabled. Cache: kB, kB, kB. Kernel: Linux 4. OpenSSL: 1. SSD Posted January 16, Frank Posted January 16, Edited January 16, by pyrater. Just now, pyrater said:. Join the conversation You can post now and register later. Reply to this topic Insert image from URL. Go to topic listing. Because approximately 90 percent of data errors are single-bit errors, ECC does a very good job. On the other hand, ECC costs a lot more, due to the additional number of bits.
Remember that ECC can correct only single-bit errors, but it can also detect multi-bit errors. Parity checking understands only that the overall byte coming out of memory doesn't match what was sent into memory. Parity checking cannot correct anything. Usually, whoever is buying the computer will decide which type of data integrity checking they want, depending mainly on cost benefits.
They can choose ECC, parity checking, or nothing. High-end computers e. Midrange desktop business computers typically are configured with parity checking. Low-cost home computers often have nonparity memory no parity checking or "fake" parity. I would like to receive exclusive offers and hear about products from Pearson IT Certification and its family of brands.
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