Kernel Panic when connecting TM disk

Dear all,

since this morning I am experiencing kernel panics when the external drive where my Time Machine gets backed-up is connected. I am attaching here the text of the kernel panics hoping that someone can shed light on them.

I have rebooted in recovery mode and got an error when trying to repair the TM volume (which Finder cannot see), there was an "error at -8" message. A kernel panic followed suite.

I rebooted in safe mode, it took ages, was able to see the second partition of the disk, from where I have to take out some data and save it, then completely blocked itself. I could not eject the disk in any way (Terminal, keyboard shortcut, Finder). Then a kernel panic followed.

I am attaching an EtreCheck v5.2 report that says the system is in Excellent condition, hopefully someone can find something useful in it for me.

Also, a utility called DriveDx indicated my drive as failing (attached images).

What can I do to access that disk without causing a kernel panic?

Thank you

MacBook Pro 15", macOS 10.13

Posted on Mar 9, 2019 12:55 PM

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44 replies

Mar 10, 2019 2:46 PM in response to BDAqua

Thank you very much! I feel better!

Now that we are slowly starting to exclude issues with the Mac itself, I am doubtful about purchasing DiskWarrior as what can I do in the two minutes before it starts kernel-panicking? It doesn't have a free trial so... I wonder what I can do.

Do you think there is something in that disk that can induce kernel panics and that can be isolated before I try to access it?

Any idea? Really anything?

Thank you once more

BDAqua

Level 10

251,667 points

Mar 14, 2019 5:21 PM in response to NotationMaster

Whew, can't find anybody with Error at 8.

I understand they have changed ** for the worse, or it easily could be due to APFS integration & overlap.

I don't understand this...

Disk Utility managed to repair the Time Machine partition after managing to Erase it.

Did you try to erase it first on the newer Mac? Did it still get the Error at 8 on exit on the old Mac?

Mar 15, 2019 12:43 AM in response to BDAqua

I don't know if upgrading to Mojave would have helped but my nose says no...

I am still the happiest I have not sold that old MBP.

No, I had not tried to attach it to the newer Mac.

Yes, on the old Mac it gave me these three messages:

This was the partition that contained my 900GB of extra data

This is the other partition being scanned for SOS

This is the result after the repair (of course I formatted it):

I am now in touch with the LaCie technical support to have this disk substituted but I will make new tests on the newer Mac to see if I still get kernel panics. What irritates me the most is the inaptitude of the Apple Store assistants. Are they really able to spot an issue or not?

Anyway, from now henceforth, I will not risk anymore having a Time Machine partition on another disk. It seems too dangerous.

Thank you for your help, don't even know which answer to put the solved mark on!

BDAqua

Level 10

251,667 points

Mar 9, 2019 2:36 PM in response to NotationMaster

Does it reset the indexing?

Should I reboot after that?

Yes.

Temps aren't too bad right now.

BDAqua

Level 10

251,667 points

Mar 10, 2019 9:14 AM in response to Barney-15E

I was wondering about what that was... should've asked, thanks.

BDAqua

Level 10

251,667 points

Mar 10, 2019 1:35 PM in response to NotationMaster

Much better yes. :)

Mar 11, 2019 4:08 AM in response to Barney-15E

Very well, I will uninstall Luna Display, reboot and try what happens.

Then I will report back!

Thank you for insisting on this!

Lexiepex

Level 6

14,138 points

Mar 15, 2019 2:10 AM in response to NotationMaster

If you want to know the health of a disk. The best prognosis app is DriveDx. Download a trial from www.binaryfruit.com, not from another site: in this download is a kextfile included, that makes it possible to analyse external disks too.

Look at the excellent explanation that DriveDx presents, by hovering your mouse pointer over the line that you want explained.

Mar 9, 2019 1:19 PM in response to BDAqua

Normally it doesn't. Please notice that now the drive is not connected so the EtreCheck may have run while the system was snapshotting, or something similar.

For example, right now Activity Monitor gives a 0,0 energy usage for Spotlight but the dropdown menu of the battery says that Spotlight is using a lot of energy.

The only USB attached to the Thunderbolt 3 ports is the LaCie Porsche Design 9227 model, 2TB.

This is the drive which is failing.

I tried a desperate move to take some files from it but it kernel-panicked.

Mar 10, 2019 1:02 PM in response to BDAqua

Sorry for the long wait, I guess we are quite a few timezones apart!

I just came back home and the MacBook Pro has been running on its own all day with no other task than the Backblaze first backup (which will take the next two weeks approximately).

In any case, at 20.53 my time here is the situation, which to me appears quite better, but tell me:

Barney-15E

Level 10

125,442 points

Mar 10, 2019 7:34 PM in response to NotationMaster

Anyway, how do I find a list of all kext?

The only ones that matter are the loaded ones when the panic happened. Luna Display is the only one loaded so it is the only potential culprit.

I'm not sure how the rest of it is important.

Mar 14, 2019 10:37 AM in response to Lexiepex

Never installed the LaCie apps... always and only used DiskUtility.

I feel that the corruption of Time Machine is what made my MacBook Pro feel so bad about that disk.

I still wonder how I can have kernel panics if the USB ports are all healthy.

Can that partition where TM was have caused all this?

BDAqua

Level 10

251,667 points

Mar 9, 2019 2:24 PM in response to NotationMaster

Whoa... might have to restart in Safe Mode. Or exclude all drives in Spotlight's pref pane.

DiskWarrior is not cheap but over the decades it's been worth it's weight in Platinum.

Lexiepex

Level 6

14,138 points

Mar 14, 2019 10:53 AM in response to NotationMaster

The Lacie should go, it is installed, probably when you started using the disk, such apps are often on the disk when new.

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Kernel Panic when connecting TM disk