Questions about the disk size of recovery hd

Discussion in 'OS X Mavericks (10.9)' started by h3blade, Oct 28, 2013.

  1. h3blade macrumors newbie

    Aug 19, 2012
    I have never use recovery hd before (hold down option key method) and have few questions regarding about this recovery hd after updated to Mavericks 10.9

    and have also created a new recovery hd for mavericks 10.9

    Recovery HD:
    容量: 650 MB(650,002,432 字节)
    BSD 名称: disk0s3
    内容: Apple_Boot

    this disk0s3 size looks like unchanged compared to 10.8, however if I go to os x TOOLS from recovery hd(hold options key at start), the disk size shows 1.25 GB? why is that?

    and also Mavericks size is over 5gb, if i use the recovery, do i need to download anything since the recovery hd is only 1.25GB.

    2. if i use the recovery hd to recovery the system, do i have to backup the applications?:eek::eek::D
  2. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    As you noticed, the recovery partition is only 650MB. That partition does not contain the actual OS, it is just a set of diagnostic tools plus a utility that allows you to download the 5GB OS from Apples servers. So every time you use that utility to install the OS, the entire 5GB OS gets downloaded again.

    A normal OS X install does not erase your applications or data, but you should always backup first anyway just to be safe.

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