Kernel panic and reboot each time I plug in ZFS Disk

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Re: Kernel panic and reboot each time I plug in ZFS Disk

Post by grahamperrin » Wed Oct 03, 2012 1:27 am

collegeitdept wrote:… Help.... at least let me copy the data off.


Please read other posts in this topic, in particular Don Brady's viewtopic.php?p=485#p485 and the subsequent reassurance that access to data was regained.

For the current Community Edition 1.1.1 (maybe more than with Silver) some familiarity with command line approaches may be required, so if you're hesitant to use Terminal: do please let us know and we'll do our best to walk through the steps, with a little extra explanation.

Postscripts

I see your cross posts under HELP ALL MY DATA is gone!; now I'm less sure of the symptoms in your case.

Key points from the two topics:

… about 3TB of data on the drive …


… When I try to run the check utility in System Preferences in the Zevo pane, the system hangs and then the computer restarts …


… When I plug the drive into the USB after a few the Mac restarts …


Please: what model is the Mac?

How much memory (RAM) is installed?

What make and model is the drive with which you have trouble?

With which version/build of the Silver Edition did you format the disk? If you can't recall the version, can you recall an approximate date?

Which operating system do you use?

When did you install the Community Edition of ZEVO?

For the drive with which you have trouble, which one of the following is true?

[  ] (a) initial use with a Community Edition was trouble-free, for a few minutes or hours or more; or

[  ] (b) kernel panics began after the ZEVO pane of System Preferences began a checkup.

(Bear in mind: ZEVO is designed to continue, wherever possible, a checkup that is interrupted.)

One or more of the kernel panic reports will be useful. You'll find these at
/Library/Logs/DiagnosticReports

Hint for users of phpBB forum software

To make an attachment, or to paste then format as code from a panic report, use the full editor:
Image
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Re: Kernel panic and reboot each time I plug in ZFS Disk

Post by collegeitdept » Wed Oct 03, 2012 5:47 pm

Hello grahamperrin,

Thank you for your reply... I would greatly appreciate a way to quickly regain access to my external drive to copy the data off of it ASAP. Right now, I'm stuck...i can't work because I can;t access my data.

Please: what model is the Mac?

MacBook Pro late 2007
15.4-inch: 2.4GHz(MA896LL/A)


How much memory (RAM) is installed?
4 GB of RAM (maybe 5)

What make and model is the drive with which you have trouble?

Western Digital My Book Home 3TB USB external drive

With which version/build of the Silver Edition did you format the disk? If you can't recall the version, can you recall an approximate date?

I formatted it using the Silver Edition that I purchased online when it came out.

Which operating system do you use?

Mac OS X 10.8.2

(PLEASE not that I am not familiar with command line) and I am not a computer or systems engineer.

When did you install the Community Edition of ZEVO?

Just yesterday to see if maybe I can regain access and mount the disk.... nope the Mac hard resets


For the drive with which you have trouble, which one of the following is true?

[ ] (a) initial use with a Community Edition was trouble-free, for a few minutes or hours or more; or

[ X ] (b) kernel panics began after the ZEVO pane of System Preferences began a checkup.

Actually, i was wrong... it wasn't that the system preferences caused the Mac to hard reset... it was mounting the hard drive. (I had the System preferences open and running when I plugged the hard drive in)... DOn't worry I tried over 10 times to mount it and see... every single time it hard reset.

(Bear in mind: ZEVO is designed to continue, wherever possible, a checkup that is interrupted.)

One or more of the kernel panic reports will be useful. You'll find these at
/Library/Logs/DiagnosticReports


Does this help?? Please help me get back my data... I will upload the log file as soon as I get home.

(BTW the Library folder is hidden in the Finder)
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Re: Kernel panic and reboot each time I plug in ZFS Disk

Post by collegeitdept » Wed Oct 03, 2012 7:37 pm

Hello,

I've attached the crash logs from that DiagnosticReports folder.

I confirmed that my MacBook Pro does have 5GB of RAM & 160GB internal hard drive.
Attachments
Crash Logs.zip
Crash Logs (Compressed)
(30.28 KiB) Downloaded 6 times
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Re: Kernel panic and reboot each time I plug in ZFS Disk

Post by collegeitdept » Wed Oct 03, 2012 7:51 pm

Also,

I have read the other posts including Don Brady's ( viewtopic.php?p=485#p485) and I don't understand them... I'm sorry I'm not familiar with command line and I am not a systems engineer.
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Re: Kernel panic and reboot each time I plug in ZFS Disk

Post by collegeitdept » Wed Oct 03, 2012 10:26 pm

Can anyone please help??

Please.
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Re: Kernel panic and reboot each time I plug in ZFS Disk

Post by grahamperrin » Wed Oct 03, 2012 11:18 pm

Patience please, collegeitdept.

Could you begin a separate topic, so that special instructions for you are not mixed with instructions for other cases in this topic?

Thanks.
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Re: Kernel panic and reboot each time I plug in ZFS Disk

Post by collegeitdept » Wed Oct 03, 2012 11:29 pm

Alright thank you.

I created a separate topic here:
viewtopic.php?f=4&t=121
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Re: Kernel panic and reboot each time I plug in ZFS Disk

Post by alexxx_dragon » Thu Oct 04, 2012 4:08 am

dbrady wrote:You may be able to import the pool readonly or rollback using pool recovery mode.

You can disable the auto-import feature as follows:
Code: Select all
$ sudo mv /System/Library/Extensions/ZFSDriver.kext /var/tmp/
$ sudo touch /System/Library/Extensions


Verify that the ZFS IOKit Driver isn't loaded, if it is you'll need to restart.
Code: Select all
$ kextstat | grep zfs


Then attach the device and manually import the pool read-only and don't mount any file systems:
Code: Select all
$ sudo zpool import -d /dev -o readonly=on -N <poolname>


If this still panics, you can check if rolling back to an earlier state using the recovery mode option is possible:
Code: Select all
$ sudo zpool import -d /dev -N -F -n <poolname>


Be sure to restore auto import after you're finished:
Code: Select all
$ sudo mv /var/tmp/ZFSDriver.kext /System/Library/Extensions/
$ sudo touch /System/Library/Extensions

Finally my data is save! Maybe interesting for the developers: After saving my data I deleted the two partitions with gparted on a linux-box (It's a RapberryPi; nice idea by the way!). After this step I plugged it in again to the Macbook and it still rebooted! I had to overwrite the partitiontable with dd and then I could create a new ZFS Filesystem. May it be, that there was a mistake in the partition table?
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Re: Kernel panic and reboot each time I plug in ZFS Disk

Post by grahamperrin » Thu Oct 04, 2012 5:03 am

That's good news, alexxx_dragon.

Can you let us know the model number of the Western Digital drive that was affected?

If you like, paste (as code) the relevant information from the USB section of a report produced by System Information.app
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Re: Kernel panic and reboot each time I plug in ZFS Disk

Post by alexxx_dragon » Fri Oct 05, 2012 12:49 am

Hi Graham,

shure, no problem:

Kapazität: 2 TB (2.000.365.289.472 Byte)
Wechselmedien: Ja
Absteckbares Laufwerk: Ja
BSD-Name: disk2
Produkt-ID: 0x0748
Hersteller-ID: 0x1058 (Western Digital Technologies, Inc.)
Version: 10.10
Seriennummer: 575854314342316000000000
Geschwindigkeit: Bis zu 5 Gbit/s
Hersteller: Western Digital
Standort-ID: 0x14a00000 / 3
Verfügbare Stromstärke (mA): 900
Erforderliche Stromstärke (mA): 224
Partitionstabellentyp: GPT (GUID-Partitionstabelle)
S.M.A.R.T.-Status: Nicht unterstützt
Volumes:
disk2s1:
Kapazität: 209,7 MB (209.715.200 Byte)
BSD-Name: disk2s1
Inhalt: EFI
disk2s2:
Kapazität: 2 TB (2.000.021.315.584 Byte)
BSD-Name: disk2s2
Inhalt: ZFS

Maybe interesting to know when this "rebooting-thing" started: I was running a parallels MSW7 image which was on the affected disc. While running this image everything started.
best greetings and thanks for your support.
If you have any further questions let me know! I'm interested in helping support development of all good things like ZFS!

aleX
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