Hm, richard's excellent Graphs here http://blogs.sun.com/relling/tags/mttdl as well as his words say he prefers mirroring over raidz/raidz2 almost always. It's better for performance and MTTDL.
Since 8 sata raid1 is cheaper and probably more reliable than 8 raidz2 sas (and I dont need extra sas performance), and offers better performance and MTTDL than 8 sata raidz2, I guess I will go with 8-sata-raid1 then! Hope I'm not horribly mistaken :) On Wed, Oct 1, 2008 at 3:18 AM, Tim <[EMAIL PROTECTED]> wrote: > > > On Tue, Sep 30, 2008 at 8:13 PM, Ahmed Kamal < > [EMAIL PROTECTED]> wrote: > >> >>> So, performance aside, does SAS have other benefits ? Data integrity ? >>> How would a 8 raid1 sata compare vs another 8 smaller SAS disks in raidz(2) >>> ? >>> Like apples and pomegranates. Both should be able to saturate a GbE >>> link. >>> >> >> You're the expert, but isn't the 100M/s for streaming not random >> read/write. For that, I suppose the disk drops to around 25M/s which is why >> I was mentioning 4 sata disks. >> >> When I was asking for comparing the 2 raids, It's was aside from >> performance, basically sata is obviously cheaper, it will saturate the gig >> link, so performance yes too, so the question becomes which has better data >> protection ( 8 sata raid1 or 8 sas raidz2) >> > > SAS's main benefits are seek time and max IOPS. > > --Tim >
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