Script to open PRO - Data volume of disk partition in Catalina

Conceptually, nothing looks wrong with your commands, although you appear to be mounting different drives than discussed in your original post (PRO FULL and PRO FULL - DATA are both on disk3).

I'm also a little confused by the fact that the container for disk3 is disk2s10, but you have another volume on disk2 that is a standard HFS volume. I guess, technically, there's nothing against doing that, but it's not typical in my experience.

That said, what happens when you do run your commands? does either volume mount? neither? any error messages?

If you know the device ID you can use the command line utility diskutil to mount the drive.

Device IDs are typically in the form of /diskxsy where x is the disk index and y is the partition number.

You can use diskutil list to get a list of attached devices along with their device IDs:

diskutil list | awk '/Pro - Data/ {print $NF}'

which you can then pass to diskutil mount via xargs:

diskutil list | awk '/Pro - Data/ {print $NF}' | xargs diskutil mount

You can run this command in the Terminal/shell, or via AppleScript's do shell script command.

Device IDs are not considered persistent. This is true across Mac OS versions, and especially true for external drives.

For example, in the current OS version, disk0 is the internal physical drive but it holds a container ('virtual drive') that is your (possibly-encrypted, possibly RAIDed) OS volume that is mounted as disk1. Older OS versions would have just mounted disk0, so your boot drive could be disk0 or disk1 depending on the OS version.

More importantly, with external drives, they are labelled in the order they are mounted. Since you explicitly indicated this is an external drive, it could be disk2 today (the first externally-attached drive), or it could be disk3 or disk4 if other drives have been attached. The likelihood of this depends entirely on your environment - if you never attach/detach other drives, USB keys, network mounts, etc. then your device IDs are likely to be more consistent. However, since it's not guaranteed, I'd recommend going with the above approach that dynamically identifies the device ID.

Just post the output of diskutil list and it should be pretty clear.

Both volumes will be associated with disk3, but they will have different slice (partition) numbers - e.g. disk3s1 and disk3s2

Note that these are only needed to mount individual partitions on the drive. If you want to mount all partitions you can just diskutil mountdisk disk3, and if you want to unmount a volume, use the Finder (tell application "Finder" to eject disk "PRO FULL")

You need to put the commands and strings on the same lines.

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