I bought a Samsung 830 SSD ( 256 GB model MZ-7PC256D )
I planned to connect it to my 27" 3.5 GHz Intel i7 iMac (mid 2011) via thunderbolt with the Seagate GoFlex adapter and use it as primary boot drive.
I installed Lion (I'm running OS X 10.7.5) on the new external drive using the OS X Recovery.
Everything runs fine and very fast except that system randomly freeze.
I can't open/close apps and the spinning beachball appears. I can't do anything other than power-off holding down the power button.
I disabled the "disk sleep" option, disk seems ok (I checked the status and said verified) but system keeps freezing.
It appears that after the first freeze, soon occur a second one.
Also, I noticed strange(?) sound (something like tock) from the adapter/SSD during the normal use.
I searched for the word error in the Console at the corresponding freeze time and this strings came out:
17/12/12 18:04:06,000 kernel: SMC::smcInitHelper ERROR: MMIO regMap == NULL - fall back to old SMC mode
17/12/12 18:04:09,043 WindowServer: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
17/12/12 18:04:09,888 Finder: kCGErrorIllegalArgument: _CGSFindSharedWindow: WID 31
17/12/12 18:04:09,888 Finder: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
17/12/12 18:04:09,888 Finder: kCGErrorIllegalArgument: CGSRemoveSurface: Invalid window 0x1f
17/12/12 18:04:17,891 talagent: CGSConnectionRelinquishWindowRights(cid, newWindowNumber, reservedRights): CGError 1001 on line 619
17/12/12 18:04:17,891 talagent: CGSReleaseWindow(cid, wid): CGError 1001 on line 759
[Here the complete error log]