Ssd raid...and TRIM
Hi,
A month ago did an ssd upgrade to my wife's mac mini server...put 2 samsung 840 evo's and tried the strip raid...the speed was above 900MB/s for write and above 950 for read...my imac, also 2011 with apple ssd in was never hitting more then 180MB/s...
This weekend i made the upgrade of my imac as well, using OWC tools and videos...i've replaced the original HDD and the optical (had to put the apple ssd into optical's place, since the cable was not long enough) and the opticals sata is sataII...set up the raid and the starting speeds were above 900 but it was dropping back when running constantly the test for 8-10 cycles...the mac mini was not doing that. Then i have tried enabling the trim...currently it's back and holding the speed above 850 constantly...
The only thing i can think of as difference, since in system info bothe imac and mini had trim off, is the install of the os in the case of mini...mini got a clean install, and the handling of the trim was different on os level. Imac got just a hdd replacement...
Just wantedn to share, maybe someone runs into a similar situation
Cheers