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   On 21/07/2024 21:28, druck wrote:   
   > On 21/07/2024 11:47, Ahem A Rivet's Shot wrote:   
   >> On Sun, 21 Jul 2024 10:44:03 +0100   
   >> The Natural Philosopher  wrote:   
   >>   
   >>> Oh indeed. My new server will feature two SMART enabled SSDs...one a   
   >>> mirror of the other.   
   >>> I am not interested in RAID. RAID increases availability, but does not   
   >>> archive data   
   >>   
   >>     You have a mirror - that's RAID. RAID is about smoothly surviving   
   >> drive failures. With any storage system there are two important factors -   
   >> mean time to data loss and probability of data unavailability.   
   >   
   > Ignoring whether its RAID or not, mirroring will protect you against a   
   > random failure of one of the drives, which was more useful in the   
   > spinning rust days when random mechanical failures were an issue.   
   >   
   I agree.   
      
   > With SSD, write life is the main issue, and if you have two identical   
   > mirrored drives, you may find any write life issues, which are not   
   > random, occur at exactly the same time.   
   >   
   But never at exactly the SAME time.   
      
   Remember the primary drive gets written to all day long as stuff like   
   this post is downmloaded, read and deleted.   
      
   The secondary gets a once a day rsync,   
      
   And, whilst I have never had an SSD wear out fromn writes in the past 8   
   years I have had one fail in a quite different way shortly after purchase.   
      
      
   > So with any type of mirrored arrangement, make sure they are different   
   > makes or models of drive, so it is less likely they fail together.   
   >   
      
   They are not subject to the same usage pattern, and they are not made   
   from the same components.   
      
   As long as they dont fail within 24 hours of each other   
      
      
   --   
   In a Time of Universal Deceit, Telling the Truth Is a Revolutionary Act.   
      
   - George Orwell   
      
   --- SoupGate-Win32 v1.05   
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