Boot Issues with MBP

Discussion in 'MacBook Pro' started by linuxpowers, May 8, 2015.

  1. linuxpowers macrumors newbie

    May 8, 2015
    I've been asked to look at a MBP to see if I can retrieve some data from it. I'm not sure what information is required for assistance as all I can see is what's printed on the outside of the machine itself....MacBook Pro. I was told it was purchased sometime around 2009!

    The problem I'm running into is that when I hit the power button, it starts up with a grey screen and the apple logo, then a spinning wheel that just keeps on spinning. I've tried using the special commands at boot time ie: Safe Mode etc to no avail. I can hold the Option button and get an image of the Hard Drive (Boot Disk and Recovery Disk - I believe it said), but the wheel spins forever whichever I click on.

    I'm also able to start it in Verbose mode and I see,

    disk0s2: I/O error
    jnl: disk0s2: update_fs_block: error reading fs block # XXXXX! (ret 5)

    then it just starts scrolling endlessly something about (hard to read):

    disk0s2: 0x6 (UNDEFINED)
    disk0s3: media not present

    so, I assume the Hard Drive is going or has gone bad, but I'm not sure. I spoke with the owner and he brought me an external HD but, without a copy of the OS on it, I believe it's useless at this point. Is there any way to create a boot disk/systems disk so that I can at least boot from the external HD to copy some files from the internal HD...retrieve some data?

    Also, I'm not sure about this but I have available a linux desktop computer. Is it possible to connect this via USB to the MBP and mount it's HD for data retrieval that way? This is assuming that the data is not corrupted.
  2. linuxpowers thread starter macrumors newbie

    May 8, 2015
    OK, so now I've figured out how to start up in Single-User mode. Once it finally loaded and left me at the prompt, -sh-3.2#, I've typed /sbin/fsck -fy for which the following information is returned:

    ** /dev/rdisk1s2
    ** Root file system
    Executing fsck_hfs (version hfs-226.1.1)
    ** Checking non-journaled HFS Plus Volume.
    The volume name is OS X Base System
    ** Checking extents overflow file.
    ** Checking catalog file.
    ** Checking multi-linked files.
    ** Checking catalog hierarchy
    ** Checking extended attributes file.
    ** Checking volume bitmap.
    ** Checking volume information.
    ** The volume OS X Base System appears to be OK.

    It's not until after that is when I start getting issues. I type in, /sbin/mount -uw /, and then I get a list of errors:

    disk1s2: device is write locked.
    0 [Level 3] [Facility] [ErrType IO] [ErrNo 13] [IOType Write] [PBlknum 2163056] [LBlkNum 2123]
    0 [Level 3] [Facility] [DevNode /dev/disk1s2] [MountPt /]

    I typed in, sw_vers and this is what was returned:

    ProductName: Mac OS X
    ProductVersion: 10.9.1
    BuildVersion: 13B42

    Now, when I type, ls /dev/disk*, I get a list as such:

    /dev/disk0 /dev/disk0s2 /dev/disk1 /dev/disk1s2
    /dev/disk0s1 /dev/disk0s3 /dev/disk1s1

    and when I plug in a new external hard drive, I get another disk listed... /dev/disk2 and /disk2s1. So, shouldn't I be able to copy files, even if the internal device is write locked, and place them on the external hard drive?
  3. Snorro, Apr 17, 2017
    Last edited: Apr 18, 2017

    Snorro macrumors newbie

    Apr 17, 2017
    I have no idea of what I should do with my Mac right now, but I have same trouble with booting up.
    My SSD was however OK, and managed to make a copy of it with another Mac. Now I have formated the SSD, and trying to boot from a bootable drive I had made. (Mavrick OS).
    But it does not seem to do anything but show a black screen when selecting the bootable drive after I hold shift at startup.

    MBP late 2011. ProductVersion:10.9.4 Build:13E28

    Did you solve your problem?
  4. Sanpete macrumors 68020

    Nov 17, 2016
    If you have an Apple Store nearby, they can do a free diagnosis, or try.

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