Mac hard resets when mounting external HD

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Mac hard resets when mounting external HD

Post by collegeitdept » Wed Oct 03, 2012 11:28 pm

I purchased Zevo silver as soon as it came out.

I formatted a new 3TB external disk to ZFS now I have almost 3TB of data on it... now I can't access (mount) the drive...

When I plug the drive into the USB after a few the Mac restarts with a Kernel like message once the monitor turns on to press any key...

PLEASE PLEASE Help.... at least let me copy the data off.

Info:

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

5 GB of RAM
160 GB internal hard drive


Western Digital My Book Home 3TB USB external drive


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.
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Re: Mac hard resets when mounting external HD

Post by grahamperrin » Thu Oct 04, 2012 12:34 am

An introduction for collegeitdept

Hello again. Thanks for your patience. To reassure you and to put things in context:

  • ZFS is designed to minimise risk of dataloss, minimise risk of data corruption
  • ZFS traditionally requires some familiarity with command lines (in things such as Terminal)
  • Apple operating systems are designed for ease of use – that ease of use extends to things such as Disk Utility, which can be used when a file system is troublesome
  • as ZEVO Community Edition 1.1.1 can not integrate fully with Disk Utility, so it may be necessary to use Terminal for a ZFS file system that is troublesome.

Some types of trouble, troubles that a disk may cause to a file system, are resolved automatically by ZEVO. No need to use Terminal.

collegeitdept, in your case the symptoms are unusual but – if your hardware (the hard disk etc.) is good – we should have confidence that data is neither lost nor corrupt.

Recently added: general advice for newcomers to a Community Edition of ZEVO.

A brief introduction for other readers

This topic is spun off from viewtopic.php?p=590#p590 where the opening poster alexxx_dragon is familiar with Terminal.

In this case I think we should take things one step at a time …
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wondering whether Silver Edition will work around

Post by grahamperrin » Thu Oct 04, 2012 12:52 am

collegeitdept wrote: … copy the data …


You could try this:

  1. disconnect the disk with which you have trouble
  2. use the ZEVO pane of System Preferences to uninstall Community Edition 1.1.1
  3. restart the computer
  4. use your original installer for the early Silver Edition of ZEVO
  5. restart the computer
  6. download the update to Silver Edition 1.0.3, install the update then restart the computer
  7. connect the disk.

If OS X presents a prompt to initialise, do not initialise (reformat) the disk.

If the required volume appears in Finder:

  1. as soon as possible, use the Spotlight pane of System Preferences to prevent Spotlight from searching the volume
  2. do not use the ZEVO preference pane to begin a checkup
  3. let us know that the volume is readable
  4. await further advice – someone here may ask you to run a simple command in Terminal.

If the required volume does not appear, or if a kernel panic causes Mountain Lion to automatically restart the computer:

  1. let us know
  2. await further advice.

----

Some of what's above may be unnecessarily cautious, but it's worth a try. It's a first set of steps.
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Re: Mac hard resets when mounting external HD

Post by collegeitdept » Thu Oct 04, 2012 1:12 am

how can download the original version of Zevo Silver?
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Re: Mac hard resets when mounting external HD

Post by collegeitdept » Thu Oct 04, 2012 1:16 am

Do you have a download link to original DMG file for Zevo Silver? As I said I bought it and installed when it first came out... months ago.
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Re: Mac hard resets when mounting external HD

Post by grahamperrin » Thu Oct 04, 2012 1:38 am

Whilst the minor update to 1.0.3 is publicly available, the full installer for Silver Edition is not.

The Ten's Complement home page states that ZEVO Silver is still supported here; if you're a registered user you'll see the question about availability.

As you no longer have your copy of the installer for Silver Edition, I imagine three medium-term options:

  • take time to familiarise yourself with use of Terminal
  • await advice in this topic from dbrady (Don Brady) or other experts within/without GreenBytes, but please bear in mind that some of the gurus were very recently devoted to a two-day conference relating to ZFS
  • await a possible fix or workaround (something greater than version 1.1.1)

– plus an immediate option:

  • uninstall the Community Edition of ZEVO.

Uninstallation will not regain access to your data, but should allow you to connect the disk without a kernel panic.

Without a kernel panic, it will be possible to gain more detailed information about the disk that's causing problems …
Last edited by grahamperrin on Thu Oct 04, 2012 2:48 am, edited 1 time in total.
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Re: Mac hard resets when mounting external HD

Post by collegeitdept » Thu Oct 04, 2012 1:59 am

Hi,

followed the steps... and the Mac doesn't hard reset after I plug it in... but the drive doesn't mount in the Finder.



When I launch Disk Utility using Spotlight the drive is listed only the it cannot mount... (if that makes sense see screen shot).


Please help... i still can't access my data.
Attachments
Screen Shot 2012-10-03 at 11.58.49 PM.png
Disk Utility
Screen Shot 2012-10-03 at 11.58.49 PM.png (152.59 KiB) Viewed 312 times
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Re: Mac hard resets when mounting external HD

Post by collegeitdept » Thu Oct 04, 2012 2:01 am

When I try to load the zevo preference pane... then checkup, it freezes
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Re: Mac hard resets when mounting external HD

Post by collegeitdept » Thu Oct 04, 2012 2:02 am

BTW ... i was able to find an original download of Zevo Silver 1.0 which i then upgraded to 1.0.3

But still no luck, I cannot access my data... it doesn't mount.
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Re: Mac hard resets when mounting external HD

Post by collegeitdept » Thu Oct 04, 2012 2:09 am

But this is getting really weird!!!

Once I eject from Disk Utility.... and unplug the hard drive from the USB port on the MacBook Pro (left port)... I tried to plug it back in... and the hard drive didn't spin up and wasn't at all recognized in Disk Utility.... so I swapped USB ports.. plugged my mouse into the left port and hard drive in the right USB port... the mouse no longer powered up....

the USB port on the right worked, disk utility listed the drive, and the hard drive spun up... I then disconnected it again, to try it again. now both USB are disabled... mouse does not light up for BOTH USB ports... what is happening???

This is causing the Mac to disable the USB controller.
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