Ya, I agree with all the above, interesting links thx.
And also, Adaptec 5805 is a bit overpriced in today's market, instead of announcing MaxIQ-"SSD" coinword cache - really its just +1000 more "cash" , maybe Adaptec (er-umm PMC-Sierra) should have announced
the 5805-version 2, that is PCI-express 2.0/SAS2/SATA3 ready ?, and it should have supported 6GB/s (sas2/sata3 speeds).
The 5805 is a great card, their software/drivers are very good and adaptec has been around forever.
But, right now, for a good "home", or even Raid system, whats is wrong with this:?
(LSI SAS 9211-8i, 6Gb/s PCI-Express 2.0) all that for $250 ?!) -heck, this thing can dance, even in a server environment.
As far as Raid levels go,
"Real" RAID is "0+1" aka Raid 10, aka Raid 01, aka "Raid KISS"... you get more raw performance, with redundancy, from this Raid than "ANY other Raid period !
It is also the simplest and "fastest" RAID to create/rebuild/... I'm sure better storage guru's than me know this.
All these "other" Raid level's(5,6,50,60,...) were historically designed to squeeze every bit of space they could outta drives, but at $100/per 2-TB Drive does anyone really care about space anymore ???
-even SAS, and SSD drives are coming down in price like crazy.
the Adaptec's MaxIQ-cache-SSD is NOT worth dumping over +1000 $ unless its super-mission-critical.
Either way, the only viable Raid that was the first, and it will be the last Raid to go, is the simple "mirrored-stripes" 0+1