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Thread: mount advice needed

  1. #21
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    Default Re: mount advice needed

    Quote Originally Posted by arvidjaar View Post
    You did not do what I asked.
    I thought you asked me to do :-
    gdisk /dev/sdb
    x
    e
    v
    q

    Which I did do and posted the result, I'm sorry if I misunderstood.
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  2. #22
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    Default Re: mount advice needed

    Sorry I did miss the 'e' step so I've just redone it :-

    Code:
    gdisk /dev/sdb
    GPT fdisk (gdisk) version 1.0.1
    
    Partition table scan:
      MBR: protective
      BSD: not present
      APM: not present
      GPT: present
    
    Found valid GPT with protective MBR; using GPT.
    
    Warning! Secondary partition table overlaps the last partition by
    4294967296 blocks!
    Try reducing the partition table size by 17179869184 entries.
    (Use the 's' item on the experts' menu.)
    
    Command (? for help): x
    
    Expert command (? for help): e
    Relocating backup data structures to the end of the disk
    
    Expert command (? for help): v
    
    No problems found. 4062 free sectors (2.0 MiB) available in 2
    segments, the largest of which is 4056 (2.0 MiB) in size.
    
    Expert command (? for help): q
    So do you think it's safe to trust the repair and let it fix it? If so what are the actual commands to follow?
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  3. #23
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    Sep 2012
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    5,143

    Default Re: mount advice needed

    Quote Originally Posted by ghep View Post
    So do you think it's safe to trust the repair and let it fix it?
    I think yes, it is reasonably safe. I would do it. Of course it is your data that is at stake, so having backup does not hurt.
    If so what are the actual commands to follow?
    Code:
    gdisk /dev/sdb
    x
    e
    v (to verify once more)
    m
    w
    You may consider backing up current partition table to file ('b' as the very first step) as extra precaution. See "man gdisk" for details.

  4. #24
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    Default Re: mount advice needed

    Quote Originally Posted by arvidjaar View Post
    I think yes, it is reasonably safe. I would do it. Of course it is your data that is at stake, so having backup does not hurt.

    Code:
    gdisk /dev/sdb
    x
    e
    v (to verify once more)
    m
    w
    You may consider backing up current partition table to file ('b' as the very first step) as extra precaution. See "man gdisk" for details.
    Are you sure about the 'e' option because I've never added disks to a RAID array and I don't want to create a virtual disk.
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  5. #25
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    Default Re: mount advice needed

    But you are in the same situation: the backup GPT is NOT at the end of the disk where it belongs.
    Henk van Velden

  6. #26
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    Default Re: mount advice needed

    OK thanks everybody, I took the plunge and did
    gdisk /dev/sdb
    x
    e
    v (to verify once more)
    m
    w

    then rebooted and everything is OK So we can close the thread.
    I'm sorry I was reluctant to change the partition table but I'm sure that years ago the partition table was in fact a table that contained all the address locations of all the files on the partition
    it always amazed me that even though the files weren't contiguously stored on the hard disk it somehow put them all together and could assemble the file from various places on the disk.
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  7. #27
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    Default Re: mount advice needed

    Good move. Hopefully, this has cleared up some of the other inconsistencies noted.
    openSUSE Leap 15.1; KDE Plasma 5;
    testing Leap 15.2Alpha

  8. #28
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    Jun 2008
    Location
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    Default Re: mount advice needed

    Quote Originally Posted by ghep View Post
    I'm sorry I was reluctant to change the partition table but I'm sure that years ago the partition table was in fact a table that contained all the address locations of all the files on the partition
    That is wrong. The partition table, like it's name suggests, contains the addresses of the partitions on the device.

    A file system is organised to have all the addresses of all the files inside that file system.

    So when you want to read a block somewhere inside a file, then the begin address of the file in the file system is added to that block address (by the file system handler) and then the kernel adds the begin address of the partition to this. Then you have the address on the device where the block is.

    Simplification, but I hope it helps in understanding.
    Henk van Velden

  9. #29
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    Default Re: mount advice needed

    OK understood and thanks to everybody for your help, I still need to do a little fine tuning but I'm OK now.
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  10. #30
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    Default Re: mount advice needed

    Maybe I spoke too soon. Notice that I have mounted 2 swap partitions this is because I increased my RAM from 8GB to 16GB which doesn't seem like a good idea.
    During the last few days while trying to resolve my Nvidia booting problems I tried an 'e' command at the Grub menu to insert 'nomodeset3' and noticed this in the 'Optional Kernel Command Line Parameter'

    Code:
    resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/disk/by-uuid/4b15c929-360b-4229-9fe4-cd405a36dece splash=silent quiet showopts vga=0x31a resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts resume=/dev/sdb3 splash=silent quiet showopts
    WOW, That's incredible, just pasting it here has made everything clear, because looking at it in grub edit or a text editor it doesn't seem as obvious as the pasted result here. So for confirmation can I safely delete 15 of those lines?
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