shivang.

Q: What is the use of these Partition.

I am runnig os x yosemite 10.10.5

 

Earlier i installed Ubuntu and for installing ubuntu i installed rEFInd software.

 

After i did my work then i just uninstalled both (Ubuntu and rEFInd).

 

Then i installed windows 10 and then i uninstalled windows 10.

 

My recovery partition was gone so i installed the recovery.

 

now i am only running mac os x 10.10.5


so i wanna know what is the use of these partition all of them

 

 

 

 

 

 

/dev/disk0

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *251.0 GB   disk0

   1:                        EFI EFI                     209.7 MB   disk0s1

   2:                  Apple_HFS YOSMITE                 250.1 GB   disk0s2

   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

MacBook Pro with Retina display, OS X Yosemite (10.10)

Posted on Sep 22, 2015 10:19 AM

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Q: What is the use of these Partition.

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  • by Kurt Lang,

    Kurt Lang Kurt Lang Sep 22, 2015 10:29 AM in response to shivang.
    Level 8 (37,837 points)
    Mac OS X
    Sep 22, 2015 10:29 AM in response to shivang.

    The 210 MB EFI partition is at the top of every physical drive formatted on the Mac as GUID. The second of course is your bootable Yosemite install, and the last the Recovery partition.

     

    The first is a leftover that doesn't belong there and is eating up half of your drive's space. Most likely a leftover caused by the Ubuntu/rEFIND combination.

     

    I would make a bootable backup of the Yosemite drive, boot to that and repartition the main drive to get rid of the odd partition. Then clone the backed up Yosemite partition back. You'd also have to install Yosemite over the restored backup to get the recovery partition back on the drive.

  • by JimmyCMPIT,

    JimmyCMPIT JimmyCMPIT Sep 22, 2015 10:33 AM in response to shivang.
    Level 5 (7,607 points)
    Mac OS X
    Sep 22, 2015 10:33 AM in response to shivang.

    information on the EFI partition can be found here

    https://en.wikipedia.org/wiki/EFI_System_partition

    The boot recovery is used by the computer in the event you need to repair your OS and is part of the OS X install process

     

    the GUID_Partition_scheme and Apple_HFS YOSEMITE are data partitions that are accessible to you

  • by shivang.,

    shivang. shivang. Sep 22, 2015 11:59 AM in response to Kurt Lang
    Level 1 (0 points)
    Sep 22, 2015 11:59 AM in response to Kurt Lang

    Thank you for the help

     

    i would like to know how to reset the partition to its original as they are on a new macbook do i have to reinstall the osx

  • by shivang.,

    shivang. shivang. Sep 22, 2015 12:02 PM in response to shivang.
    Level 1 (0 points)
    Sep 22, 2015 12:02 PM in response to shivang.

    And i wanna know what is odd partition

  • by shivang.,

    shivang. shivang. Sep 22, 2015 12:14 PM in response to Kurt Lang
    Level 1 (0 points)
    Sep 22, 2015 12:14 PM in response to Kurt Lang

    what is odd partition..?

     

    do i have to reinstall the os x to get the partitions like they are on a new macbook pro

  • by MrHoffman,Solvedanswer

    MrHoffman MrHoffman Sep 22, 2015 1:20 PM in response to shivang.
    Level 6 (15,627 points)
    Mac OS X
    Sep 22, 2015 1:20 PM in response to shivang.

    There are no odd, unexpected or unusual partitions here.   The disk0 is the physical disk, and disk1 (EFI console and boot-related bits), disk2 (your data) and disk3 (the recovery partition) are partitions on the physical disk.  That's typical of most OS X systems.

     

    If you have any data in any partition(s) here that you wish to preserve, make one or more backups before proceeding.

     

    The following will erase all data...

     

    If you want to wholly reset your entire disk0 disk environment and erase all files across all partition — this will erase all files and all data — then create an OS X Yosemite installer on external storage, and boot from it, and then use Disk Utility from that to erase the entire internal disk using Disk Utility, and continue onward to install Yosemite.   Yosemite will partition your disk appropriately.

     

    Again, this sequence erases all partitions and all data on the entire disk.

     

    If you have more than the installer and your to-be-entirely-erased internal disk around, then either disconnect the other device(s) present to avoid a mistaken erasure, or be extremely careful about which disk device you erase lest the wrong disk be clobbered.

     

    You're using the diskutil list command to get some general details on partitioning.   If you want more details about the design of GPT partitioning and related topics, then use the following command:

     

    sudo gpt show /dev/disk0

  • by Kurt Lang,

    Kurt Lang Kurt Lang Sep 23, 2015 6:36 AM in response to shivang.
    Level 8 (37,837 points)
    Mac OS X
    Sep 23, 2015 6:36 AM in response to shivang.

    Apologies. MrHoffman is absolutely correct. There's nothing odd at all about what's shown. The only thing to suggest really is that you do create a full backup so you have one.