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From: Jolly Roger <jollyroger@pobox.com>
Newsgroups: comp.sys.mac.system
Subject: Re: Spontaneous reboot and freeze
Date: 28 Dec 2014 16:36:28 GMT
Organization: People for the Ethical Treatment of Pirates
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On 2014-12-28, Savageduck <savageduck1@{REMOVESPAM}me.com> wrote:
> On 2014-12-28 14:00:18 +0000, Jolly Roger <jollyroger@pobox.com> said:
>> 
>> Did you follow these instructions?:
>> 
>> Before starting AHT, be sure to disconnect all external devices except
>> the keyboard, mouse, display, and Ethernet adapter. Also disconnect any
>> external optical drives.
>
> OK! I have a FW800 device an my Pantone hueyPro sensor to unhook.
>
>> Do you have a recovery partition installed on this computer? You can
>> tell quickly by entering the following command in a terminal window:
>
> No. I guess I might have to go to online recovery if needed.
>
>> diskutil list
>
>  list                  (List the partitions of a disk)
>      info[rmation]         (Get information on a specific disk or partition)
>      listFilesystems       (List file systems available for formatting)
>      activity              (Continuous log of system-wide disk arbitration)
[snip]

No, that's the help page for diskutil. You must have entered the command
wrong or something. The command is (without quotes): "diskutil list".
The correct output will look similar to this:

# diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE
IDENTIFIER
   0:      GUID_partition_scheme                        *500.1 GB
disk0
   1:                        EFI EFI                     209.7 MB
disk0s1
   2:          Apple_CoreStorage                         499.2 GB
disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB
disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE
IDENTIFIER
   0:                  Apple_HFS System                 *498.9 GB
disk1
                                 Logical Volume on disk0s2
                                 71DB8E55-D40A-40C1-9E1D-05BE4C39886F
                                 Unencrypted

Another way to tell if you have a recovery partition is to use Disk
Utility:

1. Quit Disk Utility.
2. In a terminal window, enter this command to enable the Disk Utility
"Debug" menu (also: see TIP below): 
	defaults write com.apple.DiskUtility DUDebugMenuEnabled 1
3. Run Disk Utility.
4. From the menu bar, choose Debug > Show Every Partition.
5. Look at the left side of the window for "Recovery HD":

<http://jollyroger.kicks-ass.org/disk_utility/recovery_hd.png>

TIP: If you install the Secrets preference panel, you can enable the
Disk Utility Debug menu (and a whole slew of other hidden settings,
including "Show Hidden Partitions") without messing with a terminal
window:

<http://jollyroger.kicks-ass.org/disk_utility/debug_mode_secrets.png>

You can get the Secrets preference panel here (look for the "PrefPane"
link near the top): <http://secrets.blacktree.com>

To use it, just extract the ZIP archive, double-click the prefpane file
to install it, and it will appear in the System Preferences window. 

>> If you see "Apple_Boot Recovery HD" listed under the /dev/disk0 entry,
>> then you do have a recovery partition on the startup drive.
>> 
>>> I have used the disc utility and my startup disc passes muster.
>> 
>> Did you specifically run the "Verify Disk" function (not the "Verify
>> Disk Permissions" function)? What is the verbatim output?
>
> Yes, and I just ran it a second time.
>
> 2014-12-27 15:47:50 -0800:
>
> **********
> 2014-12-28 07:14:06 -0800: Disk Utility started.
>
> 2014-12-28 07:14:33 -0800: Verifying volume “Macintosh HD”
> 2014-12-28 07:14:33 -0800: Starting verification tool:
> 2014-12-28 07:14:33 -0800: Verifying file system.
> 2014-12-28 07:14:33 -0800: Using live mode.
> 2014-12-28 07:14:34 -0800: Performing live verification.
> 2014-12-28 07:14:34 -0800: Checking Journaled HFS Plus volume.
> 2014-12-28 07:14:34 -0800: Checking extents overflow file.
> 2014-12-28 07:16:28 -0800: Checking multi-linked files.
> 2014-12-28 07:16:32 -0800: Checking catalog hierarchy.
> 2014-12-28 07:16:56 -0800: Checking extended attributes file.
> 2014-12-28 07:17:15 -0800: Checking volume bitmap.
> 2014-12-28 07:17:15 -0800: Checking volume information.
> 2014-12-28 07:17:16 -0800: File system check exit code is 0.
> 2014-12-28 07:17:16 -0800: Repair tool completed:
> 2014-12-28 07:17:16 -0800:
>
> 2014-12-28 07:17:16 -0800:

The drive could still be experiencing intermittent issues.

-- 
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I often ignore posts from Google. Use a real news client instead.

JR