From the standard hard disk I can start, restart, and shutdown with no issues.
From the new Samsung EVO 860 I can start and shutdown, but I can NOT restart. It freezes with a black screen. If I remove and replace power, it will restart. Or I have to hold the power button till it shuts. The watchdog timer does NOT force a restart (I let machine sit in that state for over an hour, nada).
This is a new, fresh install on older hardware (MacPro 1,1) which has been upgraded to 8 cores with X5355.
I've done the kext mod to enable TRIM on the Samsung EVO 860, but the problem exists with or without that mod. Otherwise a virgin install.
I have (of course) reset SMC, zapped NVRAM/PRAM, including replacing the PRAM battery, run fsck in single user mode, Forced safe mode (boot-args -x) etc etc.
There seems to be something about that SSD that prevents a hot restart. But after searching for days, I cannot find what it might be that I might be able to patch.
FWIW, I put a Samsung EVO 860 in my MacBook (MacBookPro9,2) a few months ago, and have had no problems, which is why I bought the EVO for this server.
Edit/Followup: Followup: I didn't realize there was an upgrade flasher for 1,1 to 2,1 - nevertheless, it did not solve the problem.
I flashed and am now a 2,1 at firmware MP21.007F.B06
I'm thinking this is more of a compatibility issue with the SMC. SMC Version (system): 1.7f10
ALSO: When trying to zap pram just now holding CMD OPT P R the system would not go into the second gong.
TO ME this means the issue is not a shut down issue but a WARM START issue, where something is failing after power is applied and before the EFI runs or completes.
It freezes BEFORE the empty grey screen.
System and OS info:
Model Name: Mac Pro Model Identifier: MacPro2,1 (flashed from 1,1) Processor Name: Quad-Core Intel Xeon (1) Processor Speed: 2.66 GHz Number Of Processors: 2 Total Number Of Cores: 8 L2 Cache (per processor): 8 MB Memory: 16 GB Bus Speed: 1.33 GHz Boot ROM Version: MP21.007F.B06. (just now reflashed) SMC Version (system): 1.7f10
(1)(upgraded to Intel(R) Xeon(R) CPU X5355 @ 2.66GHz )
System Version: Mac OS X Server 10.6.8 (10K549) Server Configuration: Advanced Kernel Version: Darwin 10.8.0 Boot Volume: ServerSSD Boot Mode: Normal Secure Virtual Memory: Not Enabled 64-bit Kernel and Extensions: No Time since boot: 40 minutes
Samsung SSD 860 EVO 500GB:
Capacity: 500.11 GB (500,107,862,016 bytes)
Model: Samsung SSD 860 EVO 500GB
Revision: RVT01B6Q Native Command Queuing: Yes Queue Depth: 32 Removable Media: No Detachable Drive: No BSD Name: disk0 Medium Type: Solid State TRIM Support: Yes Bay Name: Bay 1 Partition Map Type: GPT (GUID Partition Table) S.M.A.R.T. status: Verified
Volumes: Capacity: 209.7 MB (209,715,200 bytes) Writable: Yes BSD Name: disk0s1
ServerSSD: Capacity: 499.76 GB (499,763,888,128 bytes) Available: 474.16 GB (474,157,363,200 bytes) Writable: Yes File System: Journaled HFS+ BSD Name: disk0s2 Mount Point: /
The last items in the logs: Last few lines of Launchctl LOG looks normal:
2045937 1 com.apple.launchd 0 com.apple.fseventsd Removed 2045940 1 com.apple.launchd 1 com.apple.launchd System: No submanagers left. 2045942 1 com.apple.launchd 1 com.apple.launchd System: Done with the HopefullyExitsLast bucket, advancing. 2045944 1 com.apple.launchd 1 com.apple.launchd System: Removing. 2046653 1 com.apple.launchd 1 com.apple.launchd System: Removing job manager. 2046655 1 com.apple.launchd 1 0x100404e30.anonymous.launchd Reaping 2046662 1 com.apple.launchd 0 0x100404e30.anonymous.launchd Total rusage: utime 0.000000 stime 0.000000 maxrss 0 ixrss 0 idrss 0 isrss 0 minflt 0 majflt 0 nswap 0 inblock 0 oublock 0 msgsnd 0 msgrcv 0 nsignals 0 nvcsw 0 nivcsw 0 2046666 1 com.apple.launchd 0 0x100404e30.anonymous.launchd Removed 2046721 1 com.apple.launchd 1 com.apple.launchd VM statistics (now - orig): Free: 269210 Active: -291934 Inactive: 32018 Reactivations: 0 PageIns: 35 PageOuts: 0 Faults: 101072 COW-Faults: 39688 Purgeable: -5532 Purges: 0 2046734 1 com.apple.launchd 1 com.apple.launchd System: About to call: reboot(RB_AUTOBOOT).
Sep 4 03:23:43 MainServer kernel: systemShutdown true Sep 4 03:23:43 MainServer kernel: systemShutdown true Sep 4 03:23:43 MainServer kernel: Kext loading now disabled. Sep 4 03:23:43 MainServer kernel: Kext unloading now disabled. Sep 4 03:23:43 MainServer kernel: Kext autounloading now disabled. Sep 4 03:23:43 MainServer kernel: Kernel requests now disabled.