Talk:RAID

This is the talk page for discussing improvements to the RAID article. This is not a forum for general discussion of the subject of the article.

Add new text under old text. New to Wikipedia? Welcome! Learn to edit; get help. Start a new topic Assume good faith Be polite and avoid personal attacks Be welcoming to newcomers Seek dispute resolution if needed Article policies Neutral point of view No original research Verifiability

Find sources: Google (books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL

Archives (index): 1, 2, 3, 4, 5, 6, 7Auto-archiving period: 2 months

	RAID was a Engineering and technology good articles nominee, but did not meet the good article criteria at the time. There may be suggestions below for improving the article. Once these issues have been addressed, the article can be renominated. Editors may also seek a reassessment of the decision if they believe there was a mistake.
Article milestones Date Process Result May 22, 2006 Good article nominee Not listed

This  level-5 vital article is rated C-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects:

Computing: Software High‑importance This article is within the scope of WikiProject Computing, a collaborative effort to improve the coverage of computers, computing, and information technology on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.ComputingWikipedia:WikiProject ComputingTemplate:WikiProject ComputingComputing High This article has been rated as High-importance on the project's importance scale. This article is supported by WikiProject Software (assessed as Mid-importance). This article is supported by Computer hardware task force (assessed as High-importance).

The content of RAID 5 write hole was merged into RAID on 2013-01-19. The former page's history now serves to provide attribution for that content in the latter page, and it must not be deleted as long as the latter page exists. For the discussion at that location, see its talk page.

This article was nominated for merging with Non-RAID drive architectures on 2013-02-11. The result of the discussion was not to merge.

Archives

Index Archive 1 Archive 2 Archive 3 Archive 4 Archive 5 Archive 6 Archive 7

This page has archives. Topics inactive for 60 days are automatically archived by Lowercase sigmabot III if there are more than 4.

We should use title case for Redundant Array of Inexpensive Disks only if RAID is considered to be a proper noun. If not, redundant array of inexpensive disks is more compatible with the MOS (see WP:EXPABBR and WP:PROPERNAME) despite how sources may style it. ~Kvng (talk) 01:48, 1 May 2020 (UTC)Reply

IMO initial capitalization is appropriate under MOS:ACROFIRSTUSE which states, "Unless specified in the "Exceptions" section below, an acronym should be written out in full the first time it is used on a page, followed by the abbreviation in parentheses, e.g. Millennium Development Goals (MDGs) if it is used later in the article." Note the initial capitalization of Millennium Development Goals. RAID is the title of this article and the first time the acronym is written out it follows this policy. I would also note that the spelled out acronym frequently appears with initial caps in relevant literature such at the defining Patterson paper, the RAIDbooks, etc. Tom94022 (talk) 06:58, 1 May 2020 (UTC)Reply

That's true but MOS:ACROFIRSTUSE isn't talking about caps, the section refers to WP:EXPABBR for that. Millennium Development Goals gets title case because it is a proper noun, not because it is an acronym definition. I have started a discussion at Abbreviations#Proper_nouns_and_acronym_definitions to improve our guidance on this. ~Kvng (talk) 13:37, 4 May 2020 (UTC)Reply

Then I suggest Redundant Array of Inexpensive Disks is a proper noun per dictionary definition and as described at WP:PROPERNAME in that it is a specific storage technology as defined in the original paper and continued in general use. FWIW I looked for a discussion at Abbreviations#Proper_nouns_and_acronym_definitions but didn't find one. Tom94022 (talk) 20:01, 4 May 2020 (UTC)Reply

Sorry about the bum link. Wikipedia_talk:Manual_of_Style/Abbreviations#Proper_nouns_and_acronym_definitions is the correct link.

I don't have a good track record identifying proper nouns for these topics so I'm not going to argue about that if that's now the justification. It does look like a different call was made at Redundant array of independent memory though. ~Kvng (talk) 21:46, 4 May 2020 (UTC)Reply

Interesting observation about RAID and RAIM. I suggest that RAID's general acceptance has made its unabbreviated form a proper noun where as RAIM has not yet reached such a level of specificity and industry acceptance to be an unabbreviated proper noun. I note that RS's use both versions of RAIM but it's main promulgator IBM used the lower case version. Tom94022 (talk) 00:41, 5 May 2020 (UTC)Reply

Style guides used by sources may dictate capitalization in acronym definitions. (Wikipedia's style guide sees things differently in this area.) because of this, seeing title case in a source isn't necessarily evidence that the term is considered a proper noun. ~Kvng (talk) 13:34, 5 May 2020 (UTC)Reply

The source 87:

Leventhal, Adam (2009-12-01). "Triple-Parity RAID and Beyond. ACM Queue, Association of Computing Machinery". Retrieved 2012-11-30.

uses uncommon bit error rates, with EVEN FICTIONAL VALUES to proof something that not exists. Raid 6 2019 same reliability as 5 in 2010 ?????

Highly questionable way to calculate. MTBF is used in REALITY, increasing the reliability of bit-error-rates drastically.

92.116.65.204 (talk) 19:54, 24 October 2020 (UTC)Reply

Seems like a student published his homework. 92.116.65.204 (talk) 20:12, 24 October 2020 (UTC)Reply

Chen, Peter; Lee, Edward; Gibson, Garth; Katz, Randy; Patterson, David (1994). "RAID: High-Performance, Reliable Secondary Storage". ACM Computing Surveys. 26 (2): 145–185. CiteSeerX 10.1.1.41.3889. doi:10.1145/176979.176981.

26 Years old and same error as above: Bit-error instead of MTBF.

10¹⁴: This would mean a single 12TB SATA drive is only readable/writable once, a 20TB cannot be read/written a SINGLE TIME!!! 92.116.65.204 (talk) 21:32, 24 October 2020 (UTC)Reply

Bit error rates are averages and can be misleading taken by themselves, because errors may not be distributed randomly among the individual bits. The errors may be clustered. This means that the lack of errors could also be clustered. Instead of 10¹⁴ good bits followed by 1 bad bit, you might have 10¹⁴ good blocks followed by one bad block. The average bit error rate in both these cases is exactly the same, but the latter would be much easier for most block-based RAID implementations to deal with. — Unfortunately I do not have a good source to cite for this. — Preceding unsigned comment added by 2601:344:8080:A50:ED61:6F21:54DD:728 (talk) 04:40, 28 February 2021 (UTC)Reply

I check the 1994 paper mentioned in footnote 11. Is does not contain the word "hole". Your attribution appears to be incorrect. 149.32.192.47 (talk) 17:38, 20 February 2023 (UTC)Reply

Thanks for the heads up – I've marked the source as failing verification. The term itself is in use though, we just need a better source. --Zac67 (talk) 18:38, 20 February 2023 (UTC)Reply

Fixed? Tom94022 (talk) 21:05, 20 February 2023 (UTC)Reply

I've been playing around with Windows NT 3.51 in an emulator and the diskmgmt.msc within NT 3.51 supports RAID 0 and 1, though simply called "Striped" and "Mirrored" respectively. The article seems to imply this sort of thing was introduced with dynamic disks in 2000. Should this be corrected? 172.4.121.7 (talk) 13:48, 18 February 2024 (UTC)Reply

Intel Virtual RAID on CPU. It'd b good to mention.Setenzatsu.2 (talk) 20:36, 20 February 2026 (UTC)Reply