Repeated crashes, disk utility says disk is fine
My Macbook Pro (2007-era?), running Snow Leopard, has been suffering frequent crashes for the past several months. There appears to be no consistent trigger, but I will suddenly get the down-from-the-top screen of death that tells me I need to press and hold the power button to turn it off. When it starts up again, the problem appears to have something to do with spinlocks and mutex'es. I have tried repairing disk permissions, but that doesn't work. Interestingly, if I repair disk permissions twice in a row, the second time still reports that it is changing permissions. When I run "check disk" from the disk utility, it says my disk is fine. Even booting from the startup disk and running "repair disk" reports that the disk is fine. Any ideas?
Side note 1: The battery no longer works correctly, so if the power cord is unplugged the computer runs for a minute or two and then shuts off unexpectedly. I attempt to avoid this, and when it does happen I immediately repair disk permissions.
Side note 2: I have MATLAB R2010b installed, and this often crashes itself, reporting a segmentation fault. The MATLAB crashes and system crashes do not appear temporally correlated, and the system will crash even when MATLAB is not running. Deleting and reinstalling MATLAB does not solve the problem.
Thanks for any help!
Sample crash report:
panic(cpu 0 caller 0x226ec0): "thread_invoke: preemption_level -1, possible cause: unlocking an unlocked mutex or spinlock"@/SourceCache/xnu/xnu-1504.15.3/osfmk/kern/sched_prim.c:1471
Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
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Drive Partition and Format
1. Boot from your Snow Leopard Installer Disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
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4. Quit DU and return to the installer. Proceed with reinstalling OS X.
5. Download and install Mac OS X 10.6.8 Update Combo v1.1. -
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I have the installation disk but doesn't that erase everything?I have never bought a new computer from Apple so I don't know the details of what is covered by the warranty. You can try taking it to the Apple Store and they may have a copy of DW they can run. Or maybe not and they will just wipe the drive and reinstall the OS for you and if you haven't made a backup before they do that then tough luck. I'd check first!
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I think we both had our wires crossed a little.
Then just go ahead and clone your internal drive to your Buffalo. You are not going to use Time Machine, and you do not have to partition it. So ignore all that stuff I posted. Let me start from scratch.
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Phil -
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iPhoto ▹ Empty Trash
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Install the app you downloaded in the Applications folder as usual. Quit it if it's running.
Triple-click anywhere in the corresponding line of text below on this page to select it, then copy the selected text to the Clipboard by pressing the key combination command-C:
sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper 2>&-
sudo /Applications/GrandPerspective.app/Contents/MacOS/GrandPerspective 2>&-
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Yosemite on MacBook Air - Third time installed, now will not be startup disk. Disk Utility says OK. Disk Warrior says 375 pages of bad .plist files. How delete plist files?
What does "Accessibility" mean?Had the same problem, finally realized that the FileVault Encryption was struck at 19%. Speed back up to normal after I disabled FileVault using terminal command - sudo fdesetup diable
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Then open Terminal and type in: sudo fdesetup disable
It will then ask for the admin password (to be it asked twice), then it was disabled... Back to normal life again..
Here is my terminal log for reference:
Last login: Tue Oct 21 23:05:13 on console
Gowthams-MBP:~ asgowtham$ fdesetup status
FileVault is On.
Encryption in progress: Percent completed = 18.80
Gowthams-MBP:~ asgowtham$ fdesetup status
FileVault is On.
Encryption in progress: Percent completed = 18.80
Gowthams-MBP:~ asgowtham$ fdesetup status
FileVault is On.
Encryption in progress: Percent completed = 18.80
Gowthams-MBP:~ asgowtham$ sudo fdesetup disable
Password:
Enter a password for '/':
..fdes.
FileVault has been disabled.
Gowthams-MBP:~ asgowtham$ fdesetup status
FileVault is Off. -
My external drive won't mount. Disk Utility says it can't repair disk and to backup the disk and reformat, but how can I do that if it won't mount?
See mount section in 1st linked article.
Disk Unmount Using Terminal
Disk Utility – Force Mount Disk -
Disk Utility reports everything is fine but everything action is slow?
My 13in MacBook Pro has been running very slow lately. Disk Utility reports everything is fine yet the pinwheel shows up all the time and it takes forever to respond to a clicked app. What's going on?
First, back up all data immediately, as your boot drive might be failing.
Step 1
This diagnostic procedure will query the system log for messages that may indicate a hardware fault. It changes nothing, and therefore will not, in itself, solve your problem.
If you have more than one user account, these instructions must be carried out as an administrator. I've tested them only with the Safari web browser. If you use another browser, they may not work as described.
Triple-click anywhere in the line below on this page to select it:
syslog -k Sender kernel -k Message CReq 'Channel t|GPU D|I/O|nspace-h|n Cause: -' | tail | open -ef
Copy the selected text to the Clipboard (command-C).
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V).
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A TextEdit window will open with the output of the command. Normally the command will produce no output, and the window will be empty. If the TextEdit window (not the Terminal window) has anything in it, stop here and post it — the text, please, not a screenshot. The title of the TextEdit window doesn't matter, and you don't need to post that.
Step 2
There are a few other possible causes of generalized slow performance that you can rule out easily.
Reset the System Management Controller.
If you have many image or video files on the Desktop with preview icons, move them to another folder.
If applicable, uncheck all boxes in the iCloud preference pane.
Disconnect all non-essential wired peripherals and remove aftermarket expansion cards, if any.
Check your keychains in Keychain Access for excessively duplicated items.
Boot into Recovery mode, launch Disk Utility, and run Repair Disk.
If you're booting from an aftermarket SSD, see whether there's a firmware update for it.
If you have a MacBook Pro with dual graphics, disable automatic graphics switching in the Energy Saverpreference pane for better performance at the cost of shorter battery life.
Step 3
When you notice the problem, launch the Activity Monitor application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Activity Monitor in the icon grid.
Select the CPU tab of the Activity Monitor window.
Select All Processes from the menu in the toolbar, if not already selected.
Click the heading of the % CPU column in the process table to sort the entries by CPU usage. You may have to click it twice to get the highest value at the top. What is it, and what is the process? Also post the values for % User, % System, and % Idle at the bottom of the window.
Select the System Memory tab. What values are shown in the bottom part of the window for Page outs and Swap used?
Next, select the Disk Activity tab. Post the approximate values shown for Reads in/sec and Writes out/sec (not Reads in and Writes out.)
Step 4
If you have more than one user account, you must be logged in as an administrator to carry out this step.
Launch the Console application in the same way you launched Activity Monitor. Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select
View ▹ Show Log List
from the menu bar.
Select the 50 or so most recent entries in the log. Copy them to the Clipboard (command-C). Paste into a reply to this message (command-V). You're looking for entries at the end of the log, not at the beginning.
When posting a log extract, be selective. Don't post more than is requested.
Please do not indiscriminately dump thousands of lines from the log into this discussion.
Important: Some personal information, such as your name, may appear in the log. Anonymize before posting. That should be easy to do if your extract is not too long. -
Xserve RAID: Server Monitor says degraded, disk utility says mirror FAILED.
Xserve Quad Intel 4x2GH
4096 GB RAM
OS X Server 10.4.11
Xserve RAID 7TB 14x 500 GB ADM via dual fiber channel, Mirrored, 3.5 TB array.
Flashing yellow indicator light on Xserve this morning. Investigated and found that RAID Admin says everything is OK, all 14 drives normal.
RAID Admin log says :"4000 1 Wed Apr 08 09:37:59 EDT 2009 Disk 2 Failed To Respond. Retrying. RETRY COUNT:0 LBA:0x1C700"
Under the RAID tab, Disk utility says: "Mirrored RAID Set: Degraded" and "Disc2s3: FAILED"
All LED's are solid green across the front of the ADMs.
Since all my drives are reporting OK, could this be a problem with the Fiber Channel interfaces?
Should I just backup (again), shut down and rebuild the mirror using Disk Utility?Hi Kappy<
I am trying to migrate user data from a RAID - 1 slice from my old PowerMac G4 running OS X 10.4.11 to my new MacBook Pro running OS X 10.5.4 by reading a mirror RAID slice from my old Mac that is mounted in an external drive enclosure and connected by FireWire.
The problem is that the new Mac cannot read the old Mac disk, it never shows up on the desktop, or comes up as available when trying to use Migration Assistant. Then, if I go into Disk Utility, the external RAID slice shows up briefly with a locked yellow padlock beside it, then I suddenly get the window shade of death, and have to hold down the power button to reset/restart my MacBook.
Why can my new computer not read my old computers disk, and how can I change permissions, or make the old drive readable by the new mac.
Regrettably I am away from the original Desktop, and cannot load the old drive back into it, connect the two machines and migrate that way. My only option for reaching my necessary data is to retrieve it off the drive I have with me.
Thanks in advance for any help you can offer.
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