为什么RAID不能被关键数据信任 [英] Why can't RAID be trusted with critical data

问题描述

我了解RAID 0和RAID 1绝对不是值得存储的关键数据，但是我的问题是为什么将RAID 5或RAID 6与它们混为一谈.与一个我认为比我在管理问题上知识渊博的人(我是一名开发人员/软件工程师)进行的简短讨论指出，一个人应该永远不要将关键数据信任RAID，任何RAID".

我的问题是为什么?对我而言，这没有多大意义，因为RAID是为此专门开发的.如果没有大规模且不可恢复的磁盘故障，RAID应该可以.

在我的上下文中，关键数据是域中每个用户存储其日常所需数据的域中每个用户的文件服务器上的专用文件夹.

I understand how RAID 0 and RAID 1 are definitely not critical data store worthy, but my question is why would RAID 5 or RAID 6 be lumped up with them. A brief discussion with someone I consider much more knowledgeable than I am in administration issues (I''m more a developer/software engineer) had state that one should "never ever trust critical data to RAID, any RAID".

My question is why? it doesn''t make much sense to me because RAID was developed specifically for this. Short of a massive and unrecoverable disk failure, RAID should be fine.

Critical data in my context is a private folder on the fileserver for each user in the domain where they store their day to day needed data.

推荐答案

好吧，我想取决于他们的意思.从来不信任RAID拥有重要数据的异地存储吗?我会同意的.从不信任单个硬盘上的RAID?似乎很疯狂.

Well, I guess it depends what they mean. Never trust RAID over having an off site store for critical data ? I would agree. Never trust RAID over a single hard drive ? That seems insane.

可能是因为当人们创建RAID阵列时，他们会同时从同一制造商和同一批次获得所有驱动器，因此该批次和阵列中所有驱动器的MTBF均相同.
就个人而言，在具有4个驱动器的RAID 5阵列中出现1个以上驱动器失败的可能性很小，我不必担心.

Possibly because when people create a RAID array they get all the drives at the same time, from the same manufacturer and from the same batch so any problems with the batch and the MTBF will be the same for all drives in the array.
Personally the odds of more than 1 drive failing in a RAID 5 array with 4 drives is so small I don''t worry about it.

我猜这种感觉是，人们可能会假设我已经有了RAID，因此我的数据是完全安全的，不会发生任何不良情况"，当然，即使您正在使用RAID，也会发生许多不良情况

I''m guessing the sentiment is that people may assume "Well I''ve got a RAID, so my data is totally safe, and nothing bad could ever happen", when of course plenty of bad things can happen, even if you''re using RAID

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