Hi John,

> > sudo -i parted /dev/sda unit B print
>
> This gives:
>
>     Model: ATA CT500MX500SSD1 (scsi)
>     Disk /dev/sda: 500107862016B
>     Sector size (logical/physical): 512B/4096B
>     Partition Table: msdos
>     Disk Flags:
>
>     Number  Start       End            Size           Type      File system  
> Flags
>      1      1048576B    537919487B     536870912B     primary   fat32        
> boot
>      2      538967040B  498109251583B  497570284544B  extended
>      5      538968064B  482185576447B  481646608384B  logical   ext4
>
> Presumably, the PT should not be msdos?

No, that could be fine.  It's a 512 MiB partition.  You might find it
mounted once the system boots if you're curious what's in it.

Partition 2 reaches furthest into the disk but still leaves a large gap
at the end should you want to use GPT.

    $ units 500107862016B-498109251583B 'GiB;MiB;KiB;B'
            1 GiB + 882 MiB + 24 KiB + 1 B
    $

> > > gdisk says:
> > >
> > >     Partition table scan:
> > >        MBR: MBR only
> > >        BSD: not present
> > >        APM: not present
> > >        GPT: not present
> > >
> > >     ***************************************************************
> > >     Found invalid GPT and valid MBR; converting MBR to GPT format
> > >     in memory.
> > >     ***************************************************************
...
> > > I've had no problems so far, so the question is: can I Carry On
> > > Regardless?

Yes.  I think gparted is being misleading.  It says GPT is not present
but then says it found an invalid GPT.  I think it didn't find one and
your booting works happily without out.

As you were, carry on.

-- 
Cheers, Ralph.

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