External HD showing one partition in finder and two in disk utility

[ermo2012]

hi there, I have a problem with my external disks.

I have one Lacie 4TB disk with one partition which shows in the disk utility but does not show in the finder. It did once. Then it was shared and it also shows on other macs via the network (and you can read and write to it).

I also have a external verbatim 3tb disk, it has 2 partitions. Both partitions show in the disk utility but only one shows in the finder. The one showing in the finder is empty. The other one contains a backup of the lacie disk.

I am really stuck and 'just' want all disks and partitions to show in the local finder (the system the disks are connected to). I can use the option go -> go to folder /volumes/nameofvolume and it connects to it on the local system.

It is like the whole partition is hidden or it is hidden because of some files that are on it (because the other disc with the backup partition does not show also).

Anyone has a clue?

 

[devilcm3]

screenshot?

 

[ermo2012]

 

[Weaselboy]

Are any of these partitions encrypted?

With the external drives attached, run the below command in Terminal then post up the output.

diskutil cs list

 

[guillermija]

Are any of these partitions encrypted?

With the external drives attached, run the below command in Terminal then post up the output.

diskutil cs list

Hi there,

I have the same problem and I follow your instructions, this is what I get:

diskutil cs list
Last login: Tue Oct 1 04:19:43 on console
Guillermo-Roigs-MacBook-Pro-15:~ guillermoroig$ diskutil cs list
diskutil: did not recognize verb "cs"; type "diskutil" for a list
Guillermo-Roigs-MacBook-Pro-15:~ guillermoroig$


Can you please help? I do not have access to the partition where all my music is

 

[Weaselboy]

Can you please help? I do not have access to the partition where all my music is

Try diskutil list (without the cs part).

 

[guillermija]

Try diskutil list (without the cs part).

I used disk utility, I verified and repaired the partition, but still does not show up in Finder... what do you mean by "without the cs part"??

 

[Weaselboy]

I used disk utility, I verified and repaired the partition, but still does not show up in Finder... what do you mean by "without the cs part"??

I meant type diskutil list in Terminal and post up the output. This will show how the drive is partitioned.

 

[guillermija]

I meant type diskutil list in Terminal and post up the output. This will show how the drive is partitioned.

Disk Utility Tool
Utility to manage local disks and volumes
Most options require root access to the device

Usage: diskutil [quiet] <verb> <options>, where <verb> is as follows:

list (List the partitions of a disk)
info[rmation] (Get information on a specific disk or partition)
listFilesystems (List file systems available for formatting)

u[n]mount (Unmount a single volume)
unmountDisk (Unmount an entire disk (all volumes))
eject (Eject a disk)
mount (Mount a single volume)
mountDisk (Mount an entire disk (all mountable volumes))

enableJournal (Enable HFS+ journaling on a mounted HFS+ volume)
disableJournal (Disable HFS+ journaling on a mounted HFS+ volume)
moveJournal (Move the HFS+ journal onto another volume)
enableOwnership (Treat as exact User/Group IDs for a mounted volume)
disableOwnership (Ignore on-disk User/Group IDs for a mounted volume)

rename[Volume] (Rename a volume)

verifyVolume (Verify the file system data structure of a volume)
repairVolume (Repair the file system data structure of a volume)

verifyPermissions (Verify the permissions of a Mac OS X volume)
repairPermissions (Repair the permissions of a Mac OS X volume)

eraseDisk (Erase an existing disk, removing all volumes)
eraseVolume (Erase an existing volume)
eraseOptical (Erase optical media (CD/RW, DVD/RW, etc.))
zeroDisk (Erase a disk, writing zeros to the media)
randomDisk (Erase a disk, writing random data to the media)
secureErase (Securely erase a disk or freespace on a volume)
resizeVolume (Resize a volume, increasing or decreasing its size)

partitionDisk ((re)Partition a disk, removing all volumes)
splitPartition (Split an existing partition into two or more)
mergePartitions (Combine two or more existing partitions into one)

appleRAID <raidverb> (Perform additional verbs related to AppleRAID)

diskutil <verb> with no options will provide help on that verb

Guillermo-Roigs-MacBook-Pro-15:~ guillermoroig$

 

[Dark Dragoon]

SNIP

If you want to list the partition you run

diskutil list

in Terminal.

 

[guillermija]

If you want to list the partition you run

diskutil list

in Terminal.

ok, I got this:

Guillermo-Roigs-MacBook-Pro-15:~ guillermoroig$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS Guillermordena 499.8 GB disk0s2
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: FDisk_partition_scheme *500.1 GB disk1
1: Apple_HFS MIJA HD 493.3 GB disk1s1
2: DOS_FAT_32 SNOWLEOPARD 6.8 GB disk1s2
Guillermo-Roigs-MacBook-Pro-15:~ guillermoroig$

 

[Weaselboy]

ok, I got this:

Guillermo-Roigs-MacBook-Pro-15:~ guillermoroig$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS Guillermordena 499.8 GB disk0s2
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: FDisk_partition_scheme *500.1 GB disk1
1: Apple_HFS MIJA HD 493.3 GB disk1s1
2: DOS_FAT_32 SNOWLEOPARD 6.8 GB disk1s2
Guillermo-Roigs-MacBook-Pro-15:~ guillermoroig$

Can you be specific what the issue is? What are you unable to see in Finder that you expect to see? I don't see any unformatted or unaccounted for space there.

 

[guillermija]

Can you be specific what the issue is? What are you unable to see in Finder that you expect to see? I don't see any unformatted or unaccounted for space there.

yes, my external hard drive has two partitions, and the one named MIJA HD can not be seen on finder, hence I have no access to my music

 

[Weaselboy]

ok, I got this:

/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: FDisk_partition_scheme *500.1 GB disk1
1: Apple_HFS MIJA HD 493.3 GB disk1s1
2: DOS_FAT_32 SNOWLEOPARD 6.8 GB disk1s2

Your problem is the section I bolded here. Somehow you managed to convert the main partition table on that entire disk to a Windows format and a Mac (HFS) partition below it on that disk, and that makes the HFS MIJA partition unreadable. Any idea how that happened?

The easy fix is to reformat the entire disk in the Mac GUID partition scheme using Disk Utility, but that will wipe your data.

You might try selecting the disk itself (not the partition) in Disk Utility and do a verify disk and see what that says, although I doubt that will be of any help.

I think there is a way to convert this and fix it using the OS X Terminal utility fdisk, but I honestly am not familiar enough with it to tell you how to do that without risking losing your data.

If you want to try some Google searching what you are after is "convert fdisk partition scheme to GUID".

Maybe a commercial product like iPartition would fix this, but it costs $47. Contact the developer and show them this thread and ask them if their product can fix this without data loss.

 

[guillermija]

thanks a lot for your help, I didn't do anything special with the partition... that's weird!

I will try that with google and the developer, take care.