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Q: How do I format my new SSD properly

I have Mac Mini, late 2012, OS X Yosemite Version 10.10.4 2.5 Ghz Intel Core i5, 16Gb Ram, Intel HD Graphics 4000

 

I've recently added a 240Gb SSD to the machine.

 

It's booting up fine to the original drive, but I'm struggling to get the SSD to mount.

 

I've tried to reformat it - then realised that there was a problem that appear to be that the disk had a MBR boot record, rather than the GUID that it needs, I download Gdisk which let me sort this - but when I get it partitioned it only seems to mount momentarily and never verifies correctly - I've had a disk filing system Error 8 more than once.

 

I've tried doing this in Recovery mode - no real difference, and in Internet Recovery mode (which won't let me do anything other than reformat both drives as a hybrid drive - which ideally I would like, but I'd like to be sure that my new drive works before I take the plunge of deleting my existing drive)

 

I've also booted into single user mode and used fsck -fy - which appears to check that the original drive is OK, rather than the new one (presumably because it's still booting to the old one)

 

Any suggestions. It's a SanDisk SSD btw - I've not had any problems with their stuff before, so I'm guessing it's OK, also it is visible from the disk utility app, and the SMART monitoring shows it as verified.

 

Suggestions please ?

Mac mini, OS X Yosemite (10.10.4), Late 2012

Posted on Jul 18, 2015 1:06 PM

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Q: How do I format my new SSD properly

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  • by lllaass,

    lllaass lllaass Aug 3, 2016 12:11 PM in response to Hedegaard8
    Level 10 (187,938 points)
    Desktops
    Aug 3, 2016 12:11 PM in response to Hedegaard8

    Again, we need more information.

    What model Mac?

    What specific SSD?

    What OSX version?

    What happens when you try to format the drive?

    Are you getting error message?

    Hedegaard8 wrote:

     

    I was replying to Kappy and his procedure. Letting him and others know that this method didn't work for my SSD.

  • by Hedegaard8,

    Hedegaard8 Hedegaard8 Aug 3, 2016 12:34 PM in response to lllaass
    Level 1 (4 points)
    Aug 3, 2016 12:34 PM in response to lllaass

    Thank you for listening.


    It is a Macbook Pro mid 2012.

    Works great with old HDD.

    Replaced with SSD (Sandisk III) and the system "hanged" on "waiting for drive" when doing an Erase.

    Tried several ways to format, eraseDisk in Terminal and whole lot of things back & forth from different internet sources.

    I installed the SSD on an external USB hub and it works fine, reformatted and installed OSX Capitan on it without problems.

    Now I put it back into the Macbook and it just shows flashing folder.

    The old HDD works fine in the Mac.

     

    Just at a total loss now.

    Tried ALT+CMD+P+R reset e.t.c. nothing helped.

  • by lllaass,

    lllaass lllaass Aug 3, 2016 12:54 PM in response to Hedegaard8
    Level 10 (187,938 points)
    Desktops
    Aug 3, 2016 12:54 PM in response to Hedegaard8

    Did you previously post this same problem in another discussion?

    I recall a recent discussion with the same or very similar problem including using a Sandisk SSD.

  • by Hedegaard8,

    Hedegaard8 Hedegaard8 Aug 3, 2016 12:59 PM in response to lllaass
    Level 1 (4 points)
    Aug 3, 2016 12:59 PM in response to lllaass

    No this is my only post about this here.

  • by lllaass,

    lllaass lllaass Aug 3, 2016 1:01 PM in response to Hedegaard8
    Level 10 (187,938 points)
    Desktops
    Aug 3, 2016 1:01 PM in response to Hedegaard8

    Seems you are the second recent post with same problem. I would say incompatibility between that SSD and your Mac.

  • by Hedegaard8,

    Hedegaard8 Hedegaard8 Aug 4, 2016 4:46 AM in response to lllaass
    Level 1 (4 points)
    Aug 4, 2016 4:46 AM in response to lllaass

    Unfortunately I'm tending to agree with you.

    Have another Macbook Pro late 2011 with 2x SSD's without problems, running at 6GB/s.

     

    Strange that this newer Macbook is incompatible, could be chipset that varies.

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