Mac hard resets when mounting external HD

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Re: Mac hard resets when mounting external HD

Post by collegeitdept » Tue Oct 09, 2012 9:31 pm

I had to unplug and replug in the drive because it didn't recognize at first after staring up.
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Re: Mac hard resets when mounting external HD

Post by collegeitdept » Tue Oct 09, 2012 9:39 pm

I did it twice... For some reason turning on the computer with it plugged in, after starting up, the drive is not listed (even in disk utility). Only after I unplugged it and plugged it back in is it recognized by that terminal command:


Last login: Tue Oct 9 19:35:16 on console
administrators-macbook-pro:~ Guest$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *200.0 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 158.4 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Apple_HFS Time Machine 40.6 GB disk0s4
administrators-macbook-pro:~ Guest$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *200.0 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 158.4 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Apple_HFS Time Machine 40.6 GB disk0s4
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *3.0 TB disk1
1: EFI 209.7 MB disk1s1
2: ZFS 3.0 TB disk1s2
administrators-macbook-pro:~ Guest$
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Re: Mac hard resets when mounting external HD

Post by grahamperrin » Tue Oct 09, 2012 11:06 pm

Hint: use the full editor, paste as code. The layout will be easier to read.

Your second result, laid out as code:

Code: Select all
Last login: Tue Oct 9 19:28:51 on ttys000
administrators-macbook-pro:~ Guest$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *200.0 GB   disk0
   1:                        EFI                         209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            158.4 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
   4:                  Apple_HFS Time Machine            40.6 GB    disk0s4
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *3.0 TB     disk1
   1:                        EFI                         209.7 MB   disk1s1
   2:                        ZFS                         3.0 TB     disk1s2
administrators-macbook-pro:~ Guest$
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Re: Mac hard resets when mounting external HD

Post by grahamperrin » Tue Oct 09, 2012 11:20 pm

collegeitdept wrote:… drive is not listed … Only after I unplugged it and plugged it back in is it recognised …


Side note, unrelated to ZEVO or ZFS: in my experience (with LaCie drives), that symptom might indicate a problem with the drive. Example: its internal or external power supply might not correctly supply what's required for a timely spin up from zero RPM.
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Re: Mac hard resets when mounting external HD

Post by grahamperrin » Tue Oct 09, 2012 11:35 pm

collegeitdept wrote:… 3TB external … almost 3TB of data on it. … 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 ….


OK, let's prepare to copy from the Western Digital drive, to elsewhere.

Assuming that you plan to copy from the Western Digital to the internal disk of the laptop: have at least 10 GB free on your Macintosh HD.

(Why so much? 3 GB free for the data to be copied; plus free space that may be required by Mountain Lion for virtual memory whilst copying (this requirement may be greater for some uses of ZFS); plus an amount of free space that's considered sensible for Apple's HFS Plus filing system as a 160 GB startup volume.)

Do you have that capacity – 10 GB free – on Macintosh HD?

If not 10 GB, then please either:

  1. let us know how much free on Macintosh HD; or
  2. be prepared to use a third disk (but do not connect it too soon).
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Re: Mac hard resets when mounting external HD

Post by collegeitdept » Tue Oct 09, 2012 11:37 pm

I'll need to use a third disk... another external HD... over USB..
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Re: Mac hard resets when mounting external HD

Post by collegeitdept » Tue Oct 09, 2012 11:39 pm

Because I haven't had access to that disk, I have been saving all my data to my internal - so i have very little space left on my internal drive.
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Re: Mac hard resets when mounting external HD

Post by collegeitdept » Tue Oct 09, 2012 11:46 pm

I am now freeing 16 GB off my internal hard drive if that helps.
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Re: Mac hard resets when mounting external HD

Post by grahamperrin » Wed Oct 10, 2012 12:00 am

OK. Let us know when that third disk is available (but not connected).

----

Now, be prepared to enter your admin password for Mountain Lion.

With the ZEVO disk alone connected, run the following one-line command (three words) in Terminal. Copy the result, then please: reply and use the full editor, paste as code to this topic.

Code: Select all
sudo zpool import


Hint: in Terminal, following a prompt for a password, you'll not see the password as you type. Simply type all characters of the password, then key Return.
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Re: Mac hard resets when mounting external HD

Post by collegeitdept » Wed Oct 10, 2012 12:02 am

Alright I now have just under 19 GB free on my internal Macintosh HD
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