Dlaczego mój Mac mini jest losowo zamykany?

Mam pod koniec 2012 roku Mac Mini z 10.10.2, którego używam jako serwera w mojej sieci domowej.

Kilka miesięcy temu zacząłem odkrywać, że jest wyłączony w przypadkowych momentach. Nie jest podłączony do monitora, więc nigdy nie byłem świadkiem tego, że sam się wyłączałem.

Pomyślałem o dwóch możliwych przyczynach:

• Ustawienia oszczędzania energii powodujące wyłączenie. Wydają mi się w porządku, ale mogę zrobić coś złego. Próbowałem odłączyć USB UPC, aby usunąć to z równania. Wciąż się wyłącza.
• Katastrofalna awaria powodująca zamknięcie.

Gdzie zacznę szukać diagnozy? Jeśli jest to awaria lub wyłączenie oszczędzania energii, jaki dziennik byłby dobrym miejscem, aby zobaczyć ostatnią rzecz, która wydarzyła się przed wyłączeniem?

Oto ostatnia część dziennika konsoli tuż przed ponownym uruchomieniem:

4/7/15 1:54:01.035 PM ReportCrash[18379]: Saved crash report for xcssecurity[18377] version 6743 to /Library/Logs/DiagnosticReports/xcssecurity_2015-04-07-135401_Nexts-Mac-mini.crash
4/7/15 1:54:01.059 PM ReportCrash[18379]: Saved crash report for xcssecurity[18375] version 6743 to /Library/Logs/DiagnosticReports/xcssecurity_2015-04-07-135401-1_Nexts-Mac-mini.crash
4/7/15 1:54:01.255 PM ReportCrash[18379]: Saved crash report for xcssecurity[18376] version 6743 to /Library/Logs/DiagnosticReports/xcssecurity_2015-04-07-135401-2_Nexts-Mac-mini.crash
4/7/15 2:01:26.504 PM com.apple.backupd-helper[52]: Attempt to use XPC with a MachService that has HideUntilCheckIn set. This will result in unpredictable behavior: com.apple.backupd.status.xpc
4/7/15 2:01:56.785 PM com.apple.backupd[18749]: Starting automatic backup
4/7/15 2:01:57.008 PM com.apple.backupd[18749]: Backing up to /dev/disk8: /Volumes/Next's Time Capsule/Backups.backupdb
4/7/15 2:01:57.483 PM serveradmin[18753]: Connected to the Notify Service
4/7/15 2:01:57.526 PM serveradmin[18755]: Connected to the Notify Service
4/7/15 2:01:57.564 PM serveradmin[18757]: Connected to the Notify Service
4/7/15 2:01:57.602 PM serveradmin[18759]: Connected to the Notify Service
4/7/15 2:01:57.663 PM servermgr_devicemgr[18760]: Connected to the Notify Service
4/7/15 2:01:57.665 PM serveradmin[18761]: Connected to the Notify Service
4/7/15 2:01:57.688 PM servermgr_devicemgr[18760]: getStateWithRequest:
———————+———————
state : STOPPED
———————+———————
4/7/15 2:01:57.755 PM serveradmin[18768]: Connected to the Notify Service
4/7/15 2:01:57.793 PM serveradmin[18770]: Connected to the Notify Service
4/7/15 2:01:57.833 PM serveradmin[18772]: Connected to the Notify Service
4/7/15 2:01:57.892 PM servermgr_info[18773]: Connected to the Notify Service
4/7/15 2:01:57.913 PM serveradmin[18774]: Connected to the Notify Service
4/7/15 2:01:57.974 PM serveradmin[18777]: Connected to the Notify Service
4/7/15 2:01:58.027 PM serveradmin[18780]: Connected to the Notify Service
4/7/15 2:01:58.066 PM serveradmin[18782]: Connected to the Notify Service
4/7/15 2:01:58.067 PM serveradmin[18782]: getConnectionForModule: module servermgr_postgres not found, returning nil
4/7/15 2:01:58.067 PM serveradmin[18782]: sendRequest: cannot contact servermgr_postgres
4/7/15 2:01:58.085 PM serveradmin[18783]: Connected to the Notify Service
4/7/15 2:01:58.855 PM serveradmin[18790]: Connected to the Notify Service
4/7/15 2:01:58.913 PM serveradmin[18792]: Connected to the Notify Service
4/7/15 2:01:58.956 PM serveradmin[18794]: Connected to the Notify Service
4/7/15 2:01:59.016 PM serveradmin[18796]: Connected to the Notify Service
4/7/15 2:01:59.626 PM servermgr_swupdate[18797]: servermgr_swupdate[WRN]: Missing or invalid language for product items request.  Using default "en".
4/7/15 2:01:59.647 PM serveradmin[18798]: Connected to the Notify Service
4/7/15 2:01:59.682 PM servermgr_timemachine[18799]: Connected to the Notify Service
4/7/15 2:01:59.709 PM serveradmin[18800]: Connected to the Notify Service
4/7/15 2:01:59.991 PM serveradmin[18802]: Connected to the Notify Service
4/7/15 2:02:00.175 PM certadmin[18807]: BundleManager(non-plugin calling servermgr_certs): doCommand waiting for reply from servermgr_certs
4/7/15 2:02:00.174 PM certadmin[18807]: Connected to the Notify Service
4/7/15 2:02:00.217 PM certadmin[18807]: BundleManager(non-plugin calling servermgr_certs): got a reply = {
    exportDirectoryPath = "/etc/certificates";
}
4/7/15 2:02:00.217 PM certadmin[18807]: BundleManager(non-plugin calling servermgr_certs): doCommand finished reply = {
    exportDirectoryPath = "/etc/certificates";
}
4/7/15 2:02:00.301 PM serveradmin[18812]: Connected to the Notify Service
4/7/15 2:02:00.445 PM collabd[18819]: objc[18819]: Class CSArchive is implemented in both /Applications/Server.app/Contents/ServerRoot/System/Library/PrivateFrameworks/CSService.framework/Versions/A/CSService and /Applications/Server.app/Contents/ServerRoot/usr/sbin/collabd. One of the two will be used. Which one is undefined.
4/7/15 2:02:02.210 PM collabd[18819]: [main.m:341 7d465300 +3ms] HTTP server listening at localhost:4444
4/7/15 2:02:02.210 PM collabd[18819]: [main.m:342 7d465300 +0ms] HTTPS server listening at localhost:4443
4/7/15 2:02:02.211 PM collabd[18819]: [main.m:366 7d465300 +0ms] Configured to exit after about 360 seconds idle
4/7/15 2:02:02.350 PM serveradmin[18854]: Connected to the Notify Service
4/7/15 2:02:05.053 PM serveradmin[18903]: Connected to the Notify Service
4/7/15 2:02:05.070 PM serveradmin[18904]: Connected to the Notify Service
4/7/15 2:02:05.073 PM servermgr_accounts[18754]: Connected to the Notify Service
4/7/15 2:02:05.089 PM serveradmin[18905]: Connected to the Notify Service
4/7/15 2:02:05.113 PM serveradmin[18906]: Connected to the Notify Service
4/7/15 2:02:05.130 PM serveradmin[18907]: Connected to the Notify Service
4/7/15 2:02:05.133 PM servermgr_afp[18756]: Connected to the Notify Service
4/7/15 2:02:05.150 PM serveradmin[18908]: Connected to the Notify Service
4/7/15 2:02:05.172 PM serveradmin[18909]: Connected to the Notify Service
4/7/15 2:02:05.189 PM serveradmin[18910]: Connected to the Notify Service
4/7/15 2:02:05.201 PM servermgr_caching[18758]: Connected to the Notify Service
4/7/15 2:02:05.218 PM serveradmin[18911]: Connected to the Notify Service
4/7/15 2:02:05.244 PM serveradmin[18912]: Connected to the Notify Service
4/7/15 2:02:05.264 PM serveradmin[18913]: Connected to the Notify Service
4/7/15 2:02:05.289 PM serveradmin[18914]: Connected to the Notify Service
4/7/15 2:02:05.312 PM serveradmin[18915]: Connected to the Notify Service
4/7/15 2:02:05.370 PM serveradmin[18920]: Connected to the Notify Service
4/7/15 2:02:05.373 PM servermgr_dirserv[18763]: Connected to the Notify Service
4/7/15 2:02:05.389 PM serveradmin[18921]: Connected to the Notify Service
4/7/15 2:02:05.411 PM serveradmin[18922]: Connected to the Notify Service
4/7/15 2:02:05.428 PM serveradmin[18923]: Connected to the Notify Service
4/7/15 2:02:05.431 PM servermgr_dns[18769]: Connected to the Notify Service
4/7/15 2:02:05.447 PM serveradmin[18924]: Connected to the Notify Service
4/7/15 2:02:05.469 PM serveradmin[18925]: Connected to the Notify Service
4/7/15 2:02:05.486 PM serveradmin[18926]: Connected to the Notify Service
4/7/15 2:02:05.499 PM servermgr_ftp[18771]: Connected to the Notify Service
4/7/15 2:02:05.515 PM serveradmin[18927]: Connected to the Notify Service
4/7/15 2:02:05.540 PM serveradmin[18928]: Connected to the Notify Service
4/7/15 2:02:05.561 PM serveradmin[18929]: Connected to the Notify Service
4/7/15 2:02:05.615 PM serveradmin[18930]: Connected to the Notify Service
4/7/15 2:02:05.661 PM serveradmin[18931]: Connected to the Notify Service
4/7/15 2:02:05.697 PM serveradmin[18933]: Connected to the Notify Service
4/7/15 2:02:05.709 PM servermgr_jabber[18775]: Connected to the Notify Service
4/7/15 2:02:05.726 PM serveradmin[18935]: Connected to the Notify Service
4/7/15 2:02:05.757 PM serveradmin[18937]: Connected to the Notify Service
4/7/15 2:02:05.786 PM serveradmin[18938]: Connected to the Notify Service
4/7/15 2:02:06.914 PM servermgr_network[18779]: Connected to the Notify Service
4/7/15 2:02:06.933 PM serveradmin[18939]: Connected to the Notify Service
4/7/15 2:02:08.069 PM serveradmin[18940]: Connected to the Notify Service
4/7/15 2:02:08.085 PM serveradmin[18941]: Connected to the Notify Service
4/7/15 2:02:08.095 PM servermgr_nfs[18781]: Connected to the Notify Service
4/7/15 2:02:08.112 PM serveradmin[18943]: Connected to the Notify Service
4/7/15 2:02:08.142 PM serveradmin[18945]: Connected to the Notify Service
4/7/15 2:02:08.143 PM serveradmin[18945]: getConnectionForModule: module servermgr_postgres not found, returning nil
4/7/15 2:02:08.143 PM serveradmin[18945]: sendRequest: cannot contact servermgr_postgres
4/7/15 2:02:08.159 PM serveradmin[18946]: Connected to the Notify Service
4/7/15 2:02:08.160 PM serveradmin[18946]: getConnectionForModule: module servermgr_postgres not found, returning nil
4/7/15 2:02:08.161 PM serveradmin[18946]: sendRequest: cannot contact servermgr_postgres
4/7/15 2:02:08.178 PM serveradmin[18947]: Connected to the Notify Service
4/7/15 2:02:08.180 PM serveradmin[18947]: getConnectionForModule: module servermgr_postgres not found, returning nil
4/7/15 2:02:08.180 PM serveradmin[18947]: sendRequest: cannot contact servermgr_postgres
4/7/15 2:02:08.201 PM serveradmin[18948]: Connected to the Notify Service
4/7/15 2:02:08.267 PM serveradmin[18951]: Connected to the Notify Service
4/7/15 2:02:08.270 PM servermgr_radius[18784]: Connected to the Notify Service
4/7/15 2:02:08.286 PM serveradmin[18952]: Connected to the Notify Service
4/7/15 2:02:08.308 PM serveradmin[18953]: Connected to the Notify Service
4/7/15 2:02:08.326 PM serveradmin[18954]: Connected to the Notify Service
4/7/15 2:02:08.329 PM servermgr_san[18791]: Connected to the Notify Service
4/7/15 2:02:08.346 PM serveradmin[18955]: Connected to the Notify Service
4/7/15 2:02:08.367 PM serveradmin[18956]: Connected to the Notify Service
4/7/15 2:02:08.387 PM serveradmin[18957]: Connected to the Notify Service
4/7/15 2:02:08.389 PM servermgr_sharing[18793]: Connected to the Notify Service
4/7/15 2:02:08.407 PM serveradmin[18958]: Connected to the Notify Service
4/7/15 2:02:08.428 PM serveradmin[18959]: Connected to the Notify Service
4/7/15 2:02:08.446 PM serveradmin[18961]: Connected to the Notify Service
4/7/15 2:02:08.449 PM servermgr_smb[18795]: Connected to the Notify Service
4/7/15 2:02:08.465 PM serveradmin[18962]: Connected to the Notify Service
4/7/15 2:02:08.488 PM serveradmin[18963]: Connected to the Notify Service
4/7/15 2:02:08.491 PM servermgr_swupdate[18797]: servermgr_swupdate[WRN]: Missing or invalid language for product items request.  Using default "en".
4/7/15 2:02:08.507 PM serveradmin[18964]: Connected to the Notify Service
4/7/15 2:02:08.541 PM servermgr_swupdate[18797]: Connected to the Notify Service
4/7/15 2:02:08.558 PM serveradmin[18965]: Connected to the Notify Service
4/7/15 2:02:08.585 PM serveradmin[18966]: Connected to the Notify Service
4/7/15 2:02:08.610 PM serveradmin[18967]: Connected to the Notify Service
4/7/15 2:02:08.638 PM serveradmin[18968]: Connected to the Notify Service
4/7/15 2:02:08.669 PM serveradmin[18969]: Connected to the Notify Service
4/7/15 2:02:08.689 PM serveradmin[18970]: Connected to the Notify Service
4/7/15 2:02:08.692 PM servermgr_vpn[18801]: Connected to the Notify Service
4/7/15 2:02:08.711 PM serveradmin[18971]: Connected to the Notify Service
4/7/15 2:02:08.733 PM serveradmin[18972]: Connected to the Notify Service
4/7/15 2:02:08.850 PM serveradmin[18974]: Connected to the Notify Service
4/7/15 2:02:08.852 PM servermgr_web[18762]: Connected to the Notify Service
4/7/15 2:02:08.871 PM serveradmin[18975]: Connected to the Notify Service
4/7/15 2:02:08.894 PM serveradmin[18976]: Connected to the Notify Service
4/7/15 2:02:09.001 PM serveradmin[18979]: Connected to the Notify Service
4/7/15 2:02:09.003 PM servermgr_wiki[18813]: Connected to the Notify Service
4/7/15 2:02:09.021 PM serveradmin[18980]: Connected to the Notify Service
4/7/15 2:02:09.044 PM serveradmin[18981]: Connected to the Notify Service
4/7/15 2:02:11.216 PM serveradmin[18987]: Connected to the Notify Service
4/7/15 2:02:12.021 PM servermgr_xcode[18855]: Connected to the Notify Service
4/7/15 2:02:12.040 PM serveradmin[18990]: Connected to the Notify Service
4/7/15 2:02:13.923 PM com.apple.backupd[18749]: Will copy (141.7 MB) from Macintosh HD
4/7/15 2:02:13.924 PM com.apple.backupd[18749]: Found 171 files (141.7 MB) needing backup
4/7/15 2:02:13.954 PM com.apple.backupd[18749]: 876.3 MB required (including padding), 314.35 GB available
4/7/15 2:02:19.192 PM com.apple.backupd[18749]: Copied 181 items (141.7 MB) from volume Macintosh HD. Linked 939.
4/7/15 2:02:20.402 PM com.apple.backupd[18749]: Created new backup: 2015-04-07-140220
4/7/15 2:02:21.317 PM com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.
4/7/15 2:02:21.000 PM kernel[0]: hfs: mounted Boot OS X on device disk5s6
4/7/15 2:02:21.000 PM kernel[0]: hfs: unmount initiated on Boot OS X on device disk5s6
4/7/15 2:02:21.766 PM AppleFileServer[884]: GetAttrListStandardVolumeInfo:  getattrlist failed with errno: 2!
4/7/15 2:02:23.621 PM com.apple.backupd[18749]: Starting post-backup thinning
4/7/15 2:02:24.026 PM com.apple.backupd[18749]: Deleted /Volumes/Next's Time Capsule/Backups.backupdb/Next’s Mac mini/2015-04-06-130722 (100.7 MB)
4/7/15 2:02:24.026 PM com.apple.backupd[18749]: Post-backup thinning complete: 1 expired backups removed
4/7/15 2:02:24.118 PM com.apple.backupd[18749]: Backup completed successfully.
4/7/15 2:04:25.583 PM SystemUIServer[824]: Attempt to use XPC with a MachService that has HideUntilCheckIn set. This will result in unpredictable behavior: com.apple.backupd.status.xpc
4/7/15 2:04:25.583 PM SystemUIServer[418]: Attempt to use XPC with a MachService that has HideUntilCheckIn set. This will result in unpredictable behavior: com.apple.backupd.status.xpc
4/7/15 2:07:12.439 PM servermgr_accounts[18754]: idle exit
4/7/15 2:07:12.544 PM servermgr_afp[18756]: idle exit
4/7/15 2:07:12.545 PM servermgr_timemachine[18799]: Dispatcher: servermgr_afp plugin disconnected
4/7/15 2:07:12.571 PM servermgr_caching[18758]: idle exit
4/7/15 2:07:12.637 PM servermgr_devicemgr[18760]: idle exit
4/7/15 2:07:12.670 PM servermgr_dirserv[18763]: idle exit
4/7/15 2:07:12.769 PM servermgr_dns[18769]: idle exit
4/7/15 2:07:12.801 PM servermgr_ftp[18771]: idle exit
4/7/15 2:07:12.834 PM servermgr_info[18773]: idle exit
4/7/15 2:07:12.934 PM servermgr_jabber[18775]: idle exit
4/7/15 2:07:13.032 PM servermgr_nfs[18781]: idle exit
4/7/15 2:07:13.032 PM servermgr_radius[18784]: idle exit
4/7/15 2:07:13.140 PM servermgr_network[18779]: idle exit
4/7/15 2:07:13.853 PM servermgr_san[18791]: idle exit
4/7/15 2:07:13.919 PM servermgr_sharing[18793]: idle exit
4/7/15 2:07:13.920 PM servermgr_timemachine[18799]: Dispatcher: servermgr_sharing plugin disconnected
4/7/15 2:07:13.953 PM servermgr_smb[18795]: idle exit
4/7/15 2:07:14.039 PM servermgr_swupdate[18797]: idle exit
4/7/15 2:07:14.648 PM servermgr_timemachine[18799]: idle exit
4/7/15 2:07:14.952 PM servermgr_vpn[18801]: idle exit
4/7/15 2:07:15.202 PM servermgr_certs[18808]: idle exit
4/7/15 2:07:15.365 PM servermgr_wiki[18813]: idle exit
4/7/15 2:07:17.382 PM servermgr_xcode[18855]: idle exit
4/7/15 2:08:12.646 PM servermgr_web[18762]: idle exit
4/7/15 2:17:54.104 PM AppleFileServer[884]: Logged out 0x7fece500c000
4/7/15 2:23:14.994 PM com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.
4/7/15 2:23:15.059 PM com.apple.iCloudHelper[20168]: objc[20168]: Class FALogging is implemented in both /System/Library/PrivateFrameworks/FamilyCircle.framework/Versions/A/FamilyCircle and /System/Library/PrivateFrameworks/FamilyNotification.framework/Versions/A/FamilyNotification. One of the two will be used. Which one is undefined.
4/7/15 2:23:15.068 PM com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.
4/7/15 2:24:00.202 PM com.apple.xpc.launchd[1]: (com.apple.ReportCrash.Root[20194]) Endpoint has been activated through legacy launch(3) APIs. Please switch to XPC or bootstrap_check_in(): com.apple.ReportCrash.DirectoryService
4/7/15 2:24:01.693 PM ReportCrash[20194]: Saved crash report for xcssecurity[20191] version 6743 to /Library/Logs/DiagnosticReports/xcssecurity_2015-04-07-142401_Nexts-Mac-mini.crash
4/7/15 2:24:01.709 PM ReportCrash[20194]: Saved crash report for xcssecurity[20190] version 6743 to /Library/Logs/DiagnosticReports/xcssecurity_2015-04-07-142401-1_Nexts-Mac-mini.crash
4/7/15 2:38:20.963 PM awdd[55]: Saved awd report for awdd version awd-osx to /Library/Logs/DiagnosticReports/awdd_2015-04-07-143820_Nexts-Mac-mini.awd
4/7/15 2:38:21.080 PM awdd[55]: Diagnostics Report
4/8/15 11:14:44.000 AM bootlog[0]: BOOT_TIME 1428516884 0
4/8/15 11:15:09.000 AM syslogd[22]: Configuration Notice:
ASL Module "com.apple.AccountPolicyHelper" claims selected messages.
Those messages may not appear in standard system log files or in the ASL database.