Recently I’ve been noticing a trend where organizations with Xsan (and sometimes StorNext) are replacing older metadata LUNs with newer faster LUNs. This often involves replacing an Xserve RAID that sometimes has tens of thousands of hours of spin time on them with a Promise E-class or an ActiveRAID. The trend isn’t just with people I interact with though, as Duncan McCracken mentioned this at MacSysAdmin 2010 and Kuppusamy Ravindran (aka ravi) mentioned it back in 2008 in a post at Xsanity (he actually went way further and looked at actually splitting Metadata and Journaling, a post that is definitely worth a read). But as the pace seems to quicken…