On Thu Jun 23 11:59:02 EDT 2011, rminn...@gmail.com wrote: > you need to be careful about mirroring SSDs. > > See: Differential RAID: Rethinking RAID for SSD Reliability > Mahesh Balakrishnan (Microsoft Research Silicon Valley), Asim Kadav > (University of Wisconsin), Vijayan Prabhakaran (Microsoft Research > Silicon Valley), Dahlia Malkhi (Microsoft Research Silicon Valley)
for those who tl;dr'd ... i don't think this paper applies to write-once systems like venti (or ken fs for that matter). also, good ssds are rated in terms of a minimum amount of data that can be written to them. an very good ssds have a minimum write number that means they can be written to at maximum speed for the drive's full rated lifetime. you're not supposed to keep any drive past their rated lifetime. - erik
