2011-06-02 18:40, Josh Simon ?????:
I was just doing some storage research and came across this
http://www.nexenta.com/corp/images/stories/pdfs/hardware-supported.pdf. In
that document for Nexenta (an opensolaris variant) it states that you
should not use Intel X25-E SSDSA2SH032G1 SSD with a SAS Expander. Can
anyone tell me why?
This seems to be a very common drive people deploy in ZFS pools.
I believe one reason is that these are single-port devices - and as such
do not support failover to another SAS path.
Prooflink:
http://www.infostor.com/index/articles/display/0774287313/articles/infostor/disk-arrays/ssd-drives/pliant-delivers_efd.html
EFDs are also expected to compete to a degree with SSDs from Intel,
although some analysts -- such as Objective Analysis' Handy -- do not
consider Intel's SATA-based (single-port, half-duplex) X25-E SSDs to be
"enterprise class" SSDs. (SAS drives are dual-port, full-duplex devices.)
Another reason *may be* (maybe not, speculative) if these drives have
a SATA protocol firmware instead of a SAS one - resulting in general
feature sets...
//Jim
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