13 Replies Latest reply: Oct 14, 2012 1:47 AM by clintonfrombirmingham
charlesbt Level 1 Level 1 (0 points)

Hi

 

If go to my "Macintosh HD" in the finder under devices and click on "get info" it says that I have used 130 gb but if I go to utilities- disk utility-activity monitor-disk usage and click on "Macintosh HD" there is says that I have used 181 gb

 

I don't understand why I get two different readings

 

Any ideas?

 

 

Thanks in advance


MacBook Pro with Retina display, OS X Mountain Lion (10.8.2)
  • 1. Re: Hard drive free space?
    charlesbt Level 1 Level 1 (0 points)

    I have been looking under the system information and have pasted the details below:

     

    APPLE SSD SM256E:

     

      Capacity:          251 GB (251 000 193 024 bytes)

      Model:          APPLE SSD SM256E                       

      Revision:          CXM09A1Q

      Serial Number:          S0X5NYAC409071     

      Native Command Queuing:          Yes

      Queue Depth:          32

      Removable Media:          No

      Detachable Drive:          No

      BSD Name:          disk0

      Medium Type:          Solid State

      TRIM Support:          Yes

      Partition Map Type:          GPT (GUID Partition Table)

      S.M.A.R.T. status:          Verified

      Volumes:

    disk0s1:

      Capacity:          209,7 MB (209 715 200 bytes)

      BSD Name:          disk0s1

      Content:          EFI

    Macintosh HD:

      Capacity:          250,14 GB (250 140 434 432 bytes)

      Available:          68,41 GB (68 410 126 336 bytes)

      Writable:          Yes

      File System:          Journaled HFS+

      BSD Name:          disk0s2

      Mount Point:          /

      Content:          Apple_HFS

      Volume UUID:          C07FA193-3A61-3D1F-964C-6C0BEC64154E

    Recovery HD:

      Capacity:          650 MB (650 002 432 bytes)

      BSD Name:          disk0s3

      Content:          Apple_Boot

      Volume UUID:          A26D1F74-8F44-3AA9-8C0E-1C1BFBD9759D

     

    It seem that I have disc os1, disc os 2 and disc os 3

     

    This accounts for the differences that I mentioned. Could somebody explain what the first disc is please?

  • 2. Re: Hard drive free space?
    clintonfrombirmingham Level 7 Level 7 (28,680 points)

    From Kappy (the head honcho around here) in re disk0s1:

     

    That is the Unix representation of your hard drive's first partition, the EFI partition. There's nothing that you do with that partition, so pretend it isn't there. It's used by the operating system.

     

    Apparently you've enabled DU's ability to show invisible or hidden partitions such as this one and your Recovery HD partition. If so then these should appear ghosted.

     

    And your recovery partition - disk0s3 - is just that - a recovery partition installed with Lion and Mountain Lion.

     

    Clinton

  • 3. Re: Hard drive free space?
    charlesbt Level 1 Level 1 (0 points)

    Thanks for that Clinton

  • 4. Re: Hard drive free space?
    clintonfrombirmingham Level 7 Level 7 (28,680 points)

    No problem - here's a short little article on the Storage display that you may want to read - http://pondini.org/OSX/LionStorage.html.

     

    Good luck,

     

    Clinton

  • 5. Re: Hard drive free space?
    charlesbt Level 1 Level 1 (0 points)

    Thanks again

     

    That first disc has a total of about 50 gb being used. Is this normal?

  • 6. Re: Hard drive free space?
    clintonfrombirmingham Level 7 Level 7 (28,680 points)

    I'm not sure what you mean by "first disk" - where are you getting 50GB from? That's not what I see from what you posted... do you mean that one of the categories on the Storage tab is showing 50GB being used for something? Can you post a screenshot?

     

    I'll be up all night - call back...

     

    Clinton

  • 7. Re: Hard drive free space?
    charlesbt Level 1 Level 1 (0 points)

    Ok, here we go:

     

    This is from-about this mac-system information-serial ATA

     

    If you look at disk os1, is says that capacity is 209, 7mb-oops I misead that-thought that it said gb's

     

    But I still dont understand that my Makintosh HD says used 130 gbs and yet, if you look below, I only have 68 gbs available?

     

     

    APPLE SSD SM256E:

     

      Capacity:          251 GB (251 000 193 024 bytes)

      Model:          APPLE SSD SM256E                       

      Revision:          CXM09A1Q

      Serial Number:          S0X5NYAC409071     

      Native Command Queuing:          Yes

      Queue Depth:          32

      Removable Media:          No

      Detachable Drive:          No

      BSD Name:          disk0

      Medium Type:          Solid State

      TRIM Support:          Yes

      Partition Map Type:          GPT (GUID Partition Table)

      S.M.A.R.T. status:          Verified

      Volumes:

    disk0s1:

      Capacity:          209,7 MB (209 715 200 bytes)

      BSD Name:          disk0s1

      Content:          EFI

    Macintosh HD:

      Capacity:          250,14 GB (250 140 434 432 bytes)

      Available:          68,41 GB (68 406 407 168 bytes)

      Writable:          Yes

      File System:          Journaled HFS+

      BSD Name:          disk0s2

      Mount Point:          /

      Content:          Apple_HFS

      Volume UUID:          C07FA193-3A61-3D1F-964C-6C0BEC64154E

    Recovery HD:

      Capacity:          650 MB (650 002 432 bytes)

      BSD Name:          disk0s3

      Content:          Apple_Boot

      Volume UUID:          A26D1F74-8F44-3AA9-8C0E-1C1BFBD9759D

  • 8. Re: Hard drive free space?
    charlesbt Level 1 Level 1 (0 points)

    HI again Clinton

     

    Was reading that Pondini article that you posted and so I decided to switch off time machine-nothing was connected to it at the time.Then switch it back on again. Now that extra free +- 50 gbs have come back.

     

    I did a lot of hard shut downs last night due to Safari freezing-maybe that had something to do with it?

     

    See below:

     

    APPLE SSD SM256E:

     

      Capacity:          251 GB (251 000 193 024 bytes)

      Model:          APPLE SSD SM256E                       

      Revision:          CXM09A1Q

      Serial Number:          S0X5NYAC409071     

      Native Command Queuing:          Yes

      Queue Depth:          32

      Removable Media:          No

      Detachable Drive:          No

      BSD Name:          disk0

      Medium Type:          Solid State

      TRIM Support:          Yes

      Partition Map Type:          GPT (GUID Partition Table)

      S.M.A.R.T. status:          Verified

      Volumes:

    disk0s1:

      Capacity:          209,7 MB (209 715 200 bytes)

      BSD Name:          disk0s1

      Content:          EFI

    Macintosh HD:

      Capacity:          250,14 GB (250 140 434 432 bytes)

    Available:          117,51 GB (117 506 883 584 bytes)

      Writable:          Yes

      File System:          Journaled HFS+

      BSD Name:          disk0s2

      Mount Point:          /

      Content:          Apple_HFS

      Volume UUID:          C07FA193-3A61-3D1F-964C-6C0BEC64154E

    Recovery HD:

      Capacity:          650 MB (650 002 432 bytes)

      BSD Name:          disk0s3

      Content:          Apple_Boot

      Volume UUID:          A26D1F74-8F44-3AA9-8C0E-1C1BFBD9759D

  • 9. Re: Hard drive free space?
    clintonfrombirmingham Level 7 Level 7 (28,680 points)

    Was reading that Pondini article that you posted and so I decided to switch off time machine-nothing was connected to it at the time.Then switch it back on again. Now that extra free +- 50 gbs have come back.

     

    Yeah - those are the 'local snapshots' that Time Machine uses. They can speed up a TM backup if you only connect to your external TM backup drive occassionaly, but they can really eat up some disk space. Reight now - long story - I'm at my desk about 85% of the time so I keep my TM externals plugged in. Very little space taken up by snapshots.

     

    I did a lot of hard shut downs last night due to Safari freezing-maybe that had something to do with it?

     

    I don't know - why disk space would have anything to do with Safari freezing. I only use Safari for testing purposes - my primary browser is Firefox. You may want to note the time of your next Safari freeze and then go back into the system logs via Console (Applications>Utilities) and see if you notice anything unusual in the logs.

     

    But, for now, you know how your internal is using space and that's a good thing!

     

    Clinton

  • 10. Re: Hard drive free space?
    charlesbt Level 1 Level 1 (0 points)

    Thanks again Clinton

     

    By the way, do you have any experience with the retina macbook pro?

    I have had mine for about six weeks now and its gorgeous but it creaks and cracks when I type on it and when I pick it up.

     

    I am in South Africa and my nearest Apple service store is about 500 kms from me.

    I have ordered a pentalobe screwdriver from the us but am afraid of voiding the warranty.

     

    Any ideas on this one?

  • 11. Re: Hard drive free space?
    clintonfrombirmingham Level 7 Level 7 (28,680 points)

    I don't have a Retina but I've been on here long enough to have seen a number of people complain about 'creaks and cracks' on the Retina display models. Since your 'closest' Apple Store is so far away, I would try calling AppleCare first (oops - don't see a South African phone number on this page - http://support.apple.com/kb/HE57)... well, is there a way to call the Apple Store surely?

     

    Anyway, the only 'remedy' that I've read of is either getting the case or the unit replaced. Not good news, I know, but it's the only way to 'solve' the problem that I've read of.

     

    Sorry,

     

    Clinton

  • 12. Re: Hard drive free space?
    charlesbt Level 1 Level 1 (0 points)

    Hi Clinton

     

    Thats kind of what I thought. I will take it to the Apple store when I go down to Cape Town again.

     

    Thanks again for all your help and have a good one!

     

    Cheers

     

    Charles

  • 13. Re: Hard drive free space?
    clintonfrombirmingham Level 7 Level 7 (28,680 points)

    Back at you - today's going to be a great one!

     

    Clinton