SOLVED GPT Mount Error

[scottmaverick]

I am trying to mount a GPT formatted disk in FreeNAS 9.10. Here is what I've tried so far.

Code:

# gpart show

=>      34           5860533101  da15      GPT  (2.7T)
           34                   262144     1         ms-reserved  (128M)
      262178                    2014                - free -  (1.0M)
      264192       5860268032     2        ms-basic-data  (2.7T)
  5860532224                  911               - free -  (456K)

Then I try to mount:

Code:

[root@freenas] /# mount -t gpt /dev/da15 /mnt/external/
mount: /dev/da15: Operation not supported by device
[root@freenas] /# mount -t gpt /dev/da15s1 /mnt/external/
mount: /dev/da15s1: Operation not supported by device

Is there a different way I should be doing this?

 

[wblock]

Well, yes. GPT is a type of partitioning. mount doesn't care about that, it cares about the type of filesystem. I don't know what ms-basic-data is as a filesystem, though.

 

[scottmaverick]

Well I was trying to use ntfs-3g because the filesystem was NTFS. That does not work for this drive and the other drives I've used it with all say NTFS where this one says GPT.

 

[wblock]

It's the part that says ms-basic-data where it would normally say NTFS. If you think that really is NTFS, you can try ntfs-3g on the da15p2 partition.

 

[wblock]

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

 

[scottmaverick]

Here my attempt with ntfs-3g, this has worked for the other drives, but they dont show up slightly different in gpart.

Code:

[root@freenas] ~# ntfs-3g -o ro /dev/da15 /mnt/external/
NTFS signature is missing.
Failed to mount '/dev/da15': Invalid argument
The device '/dev/da15' doesn't seem to have a valid NTFS.

Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?

Code:

[root@freenas] ~# ntfs-3g -o ro /dev/da15s1 /mnt/external/
ntfs-3g: Failed to access volume '/dev/da15s1': No such file or directory

This is what gpart shows for another disk which worked using the ntfs command.

Code:

=>
 63                     3907029105      da14  MBR  (1.8T)
 63                                 1985                 - free -  (993K)
 2048                3907024896        1       ntfs  [active]  (1.8T)
 3907026944                 2224                 - free -  (1.1M)

 

[wblock]

As said above, use /dev/da15p2.

On FreeBSD, old crappy MBR partitions start with an s. New, nice GPT partitions start with a p.

Note that the old drive was MBR partitioned, and the ntfs filesystem was on partition 1, so it is da14s1.

 

[scottmaverick]

For the ntfs-3g command or the mount command?

 

[wblock]

Untested: ntfs-3g /dev/da15p2 /mnt/external

 

[scottmaverick]

Thanks for your help I got it working now.

[root@freenas] ~# ntfs-3g -o ro /dev/da15p2 /mnt/external/