Hi, repeat of an older question I asked some months back. Looking to
add BBU writeback "HBA" to run software raid over the top. So ideally I
want either a raid controller which can pretend to be an HBA with 4
individual drives each with writeback cache (and a battery). Or at a
pinch I would accept a controller which can offer 2 pairs of RAID-1 with
writeback cache and I would run linux raid-0 (or XFS storage groups)
over the top - caveat that I would very much desire that if the hardware
controller fails I can pull the individual raid-1 drives out and access
them from a vanilla motherboard controller?
The goal is to be able to safely enable writeback caching on a 4 drive
RAID10 (or XFS over raid-1), but if the controller should fail (or even
just an urgent need to access the data from a second machine) then I can
access the arrays from another machine which doesn't have such a
controller. Operating system is a recent linux 3 kernel
Can anyone comment on whether such a hardware card exists (seems it's
hard to get writeback caching on drives *and* have those drives readable
without the same controller present). Currently eyeing up the Areca 1882
8 port unit - thoughts?
Thanks for any advice
Ed W
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