Subj : Re: Is there a test suite for Pi2/armv7 ? To : druck From : The Natural Philosopher Date : Mon Jul 22 2024 09:50:21 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 * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3) .