On 05/06/2015 05:22 PM, Konstantin Olchanski wrote:
> On Wed, May 06, 2015 at 04:46:27PM -0700, ToddAndMargo wrote:
>>
>> ... that I ... get the most reliable SSD I can find and talk
>> the customer out of RAID.
>>
>
> This is bad thinking. "most reliable" does not mean "will never fail".
>
> (leaving aside the question on how you can tell which brand is more
> reliable, other than by vendor rosy promises or by counting of stars at newegg).
>
> If you are building a system for a customer, you have to have a reasonable
> answer to the question "if this SSD fails, do I lose all of everything?".
>
> This means you have to have backups of everything and well tested instructions
> on how to restore the full working system from these backups.
>
> In my experience, mdadm RAID1 is the simplest way to build a system
> that survives single device failure (SSD or HDD, does not matter),
> but you still have to have backups and restoration instructions
> because RAID1 does not protect against filesystem corruption,
> against accidentally or maliciously deleted or modified files, etc.
>


Thank you.  I will have to get over my phobia of software
RAID.


-- 
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Computers are like air conditioners.
They malfunction when you open windows
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