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|   | [[Category:Integration]]  |   | [[Category:Integration]]  | 
| − | <!-- (Originally written by alanruttenberg) -->
  |   | 
|   |  |   |  | 
| − | == Problem ==
  | + | As of version 1.3.0, you should not see the message "The disk you inserted was not readable by this computer" unless one or more devices in your pool is a partition with a type code specifying a file system other than ZFS. The correct partition type for OpenZFS on OS X is 6A898CC3-1DD2-11B2-99A6-080020736631, which may display as any of the following, depending on what tool you're using:  | 
| − | You are getting messages "The disk you inserted was not readable by
  | + |  | 
| − | this computer" for disks you have added to a ZFS pool. This was originally reported as [https://github.com/openzfsonosx/zfs/issues/102 issue 102]  | + |  | 
|   |  |   |  | 
| − | == Background ==
  | + | * bf01  | 
|   | + | * ZFS  | 
|   | + | * EFI_USR  | 
|   | + | * Solaris /usr & Mac ZFS  | 
|   | + | * 6A898CC3-1DD2-11B2-99A6-080020736631  | 
|   |  |   |  | 
| − | OSX tries to mount all disks but doesn't know about ZFS. In order to
  | + | The easiest way to correct the partition type is to use "gdisk" which is distributed via [http://brew.sh Homebrew] as the formula "gptfdisk" or via a pkg installer [http://sourceforge.net/projects/gptfdisk/files/gptfdisk/ here]. The gdisk subcommand for changing partition type is 't'.  | 
| − | work around the error message we will exploit the fact that
  | + |  | 
| − | diskarbitration is forgiving. As long as OSX has one valid partition
  | + |  | 
| − | it will not complain.
  | + |  | 
| − |    | + |  | 
| − | When you use diskutil to view information about a disk you have added
  | + |  | 
| − | to a zpool, you will see two partitions, partition 1 and partition
  | + |  | 
| − | 9. Partition 9 is unused by ZFS. To satisfy OSX we will use partition 9,
  | + |  | 
| − | changing it to a partition type that OSX knows about and formatting a file system on it. Then we will
  | + |  | 
| − | tell OSX not to bother mounting it by adding an entry to /etc/fstab
  | + |  | 
| − |    | + |  | 
| − | You will need software called "gdisk" to do some of this. Get it [http://sourceforge.net/projects/gptfdisk/files/gptfdisk/0.8.8/gdisk-binaries/ here] 
  | + |  | 
| − |    | + |  | 
| − | == Step by step ==
  | + |  | 
| − |    | + |  | 
| − | # Save the output of diskutil list
  | + |  | 
| − | # Backup all your partition tables
  | + |  | 
| − | # Change the type of partition 9 on any disks that are in the zpool to 'Microsoft basic data', a type that is used by FAT and EXFAT file systems.
  | + |  | 
| − | # Reboot
  | + |  | 
| − | # Format each of the partition 9s you've changed the type on using  the newfs_exfat command
  | + |  | 
| − | # Use diskutil to get the UUIDs of the partitions you've just formatted
  | + |  | 
| − | # Modify /etc/fstab to tell OSX not to mount the partitions with those UUIDs
  | + |  | 
| − | # Reboot and be happy
  | + |  | 
| − |    | + |  | 
| − | === Save the output of diskutil list ===
  | + |  | 
| − |    | + |  | 
| − | In terminal execute <code>diskutil list</code> and save it. The entries for your ZFS disks will look something like the following. Mine looked like [http://pastebin.com/jUV8cfcA this].
  | + |  | 
| − | <pre>
  | + |  | 
| − | /dev/disk4
  | + |  | 
| − |    #:                       TYPE NAME                    SIZE       IDENTIFIER
  | + |  | 
| − |    0:      GUID_partition_scheme                        *1.5 TB     disk4
  | + |  | 
| − |    1:                        ZFS                         1.5 TB     disk4s1
  | + |  | 
| − |    2: 6A945A3B-1DD2-11B2-99A6-080020736631               8.4 MB     disk4s9
  | + |  | 
| − | </pre>
  | + |  | 
| − |    | + |  | 
| − | === Backup all your partition tables ===
  | + |  | 
| − |    | + |  | 
| − | You use gdisk for this. To work with the disk above, /dev/disk4, run <code>sudo gdisk /dev/disk4</code>. It will say something like the following 
  | + |  | 
| − |    | + |  | 
| − | <pre>
  | + |  | 
| − | GPT fdisk (gdisk) version 0.8.8
  | + |  | 
| − |    | + |  | 
| − | Warning: Devices opened with shared lock will not have their
  | + |  | 
| − | partition table automatically reloaded!
  | + |  | 
| − | Partition table scan:
  | + |  | 
| − |   MBR: protective
  | + |  | 
| − |   BSD: not present
  | + |  | 
| − |   APM: not present
  | + |  | 
| − |   GPT: present
  | + |  | 
| − |    | + |  | 
| − | Found valid GPT with protective MBR; using GPT.
  | + |  | 
| − |    | + |  | 
| − | Command (? for help):  
  | + |  | 
| − | </pre>
  | + |  | 
| − |    | + |  | 
| − | Entering "?"[return] gives the list of commands (all single letter)
  | + |  | 
| − | <pre>
  | + |  | 
| − | b	back up GPT data to a file
  | + |  | 
| − | c	change a partition's name
  | + |  | 
| − | d	delete a partition
  | + |  | 
| − | i	show detailed information on a partition
  | + |  | 
| − | l	list known partition types
  | + |  | 
| − | n	add a new partition
  | + |  | 
| − | o	create a new empty GUID partition table (GPT)
  | + |  | 
| − | p	print the partition table
  | + |  | 
| − | q	quit without saving changes
  | + |  | 
| − | r	recovery and transformation options (experts only)
  | + |  | 
| − | s	sort partitions
  | + |  | 
| − | t	change a partition's type code
  | + |  | 
| − | v	verify disk
  | + |  | 
| − | w	write table to disk and exit
  | + |  | 
| − | x	extra functionality (experts only)
  | + |  | 
| − | ?	print this menu
  | + |  | 
| − | </pre>
  | + |  | 
| − |    | + |  | 
| − | Type "b"[return] to backup your partition table. It prompts <code>Enter backup filename to save: </code>. Give it a name - it will save the backup in your current directory.
  | + |  | 
| − |    | + |  | 
| − | Repeat this for all the disks listed by diskutul. 
  | + |  | 
| − |    | + |  | 
| − | === Change the type of partition 9 on any disks that are in the zpool to 'Microsoft basic data' ===
  | + |  | 
| − |    | + |  | 
| − | To change the partition type use gdisk again. You are going to do this *only for the disks in your ZFS pools*. One of mine was /dev/disk4 so <code>sudo gdisk /dev/disk4</code>. Type "t"[return]. It will prompt for the partition number, which will always be "9" and then say something like:
  | + |  | 
| − |    | + |  | 
| − | <pre>
  | + |  | 
| − | Command (? for help): t
  | + |  | 
| − | Partition number (1-9): 9
  | + |  | 
| − | Current type is 'Solaris Reserved 1'
  | + |  | 
| − | Hex code or GUID (L to show codes, Enter = AF00): 
  | + |  | 
| − | </pre>
  | + |  | 
| − |    | + |  | 
| − | Enter "0700"[return]. The response should be 
  | + |  | 
| − |    | + |  | 
| − | <pre>
  | + |  | 
| − | Changed type of partition to 'Microsoft basic data'
  | + |  | 
| − | Command (? for help):  
  | + |  | 
| − | </pre>
  | + |  | 
| − |    | + |  | 
| − | Use "w"[return] to save this. 
  | + |  | 
| − |    | + |  | 
| − | Repeat for each of the disks in your ZFS pools. Once you are done, reboot.
  | + |  | 
| − |    | + |  | 
| − | === Reboot ===
  | + |  | 
| − |    | + |  | 
| − | === Format each of the partition 9s you've changed the type on ===
  | + |  | 
| − |    | + |  | 
| − | The command to do this is newfs_exfat, which comes with OSX. For my disk4 the command is <code> sudo newfs_exfat /dev/rdisk4s9 </code>. Note that the /dev/disk description is different than above. First we use /dev/ "rdisk" instead of "disk", and second both the drive number and the partition number (suffix "s9") are in the name. 
  | + |  | 
| − |    | + |  | 
| − | The command will respond with something like (the specifics will be different for your disk).
  | + |  | 
| − |    | + |  | 
| − | <pre>
  | + |  | 
| − | Partition offset : 1953507328 sectors (1000195751936 bytes)
  | + |  | 
| − | Volume size      : 16384 sectors (8388608 bytes)
  | + |  | 
| − | Bytes per sector : 512
  | + |  | 
| − | Bytes per cluster: 4096
  | + |  | 
| − | FAT offset      : 128 sectors (65536 bytes)
  | + |  | 
| − | # FAT sectors    : 128
  | + |  | 
| − | Number of FATs  : 1
  | + |  | 
| − | Cluster offset  : 256 sectors (131072 bytes)
  | + |  | 
| − | # Clusters      : 2016
  | + |  | 
| − | Volume Serial #  : 52a0c680
  | + |  | 
| − | Bitmap start    : 2
  | + |  | 
| − | Bitmap file size : 252
  | + |  | 
| − | Upcase start    : 3
  | + |  | 
| − | Upcase file size : 5836
  | + |  | 
| − | Root start      : 5
  | + |  | 
| − | </pre>
  | + |  | 
| − |    | + |  | 
| − | Repeat this for each partition 9 of a disk in your zpools.
  | + |  | 
| − |    | + |  | 
| − | === Use diskutil to get the UUIDs of the partitions you've just formatted ===
  | + |  | 
| − |    | + |  | 
| − | The <i>slick</i> way to get the UUID is with a command <code>exfat.util</code>, hidden away in your /System folder. 
  | + |  | 
| − |    | + |  | 
| − | <pre>
  | + |  | 
| − | sudo /System/Library/Filesystems/exfat.fs/exfat.util -k disk4s9
  | + |  | 
| − | </pre>
  | + |  | 
| − |    | + |  | 
| − | The response should look like a UUID. In my case <b>4AEF07DA-8B2B-375C-919B-2441DE07FE8A</b>.
  | + |  | 
| − |    | + |  | 
| − | Repeat for each of the partition 9s in your zpool disks, recording the UUIDs.
  | + |  | 
| − |    | + |  | 
| − | === Modify /etc/fstab to tell OSX not to mount the partitions with those UUIDs ===
  | + |  | 
| − |    | + |  | 
| − | You could use a text editor, e. g. <code>sudo pico /etc/fstab/</code> with the text inside the single quotation marks, but you can also use a one-line command in the Terminal window, one for each of the UUIDs you retrieved in the previous step.
  | + |  | 
| − |    | + |  | 
| − | <pre>
  | + |  | 
| − | echo 'UUID=4AEF07DA-8B2B-375C-919B-2441DE07FE8A none exfat ro,noauto' | sudo tee -a /etc/fstab
  | + |  | 
| − | </pre>
  | + |  | 
| − |    | + |  | 
| − | Use <i>your</i> UUIDs, of course.
  | + |  | 
| − |    | + |  | 
| − | === Reboot ===
  | + |  | 
| − |    | + |  | 
| − | You should no longer get the complaint about the unreadable disks. Enjoy!
  | + |  | 
| − |    | + |  | 
| − | == Original IRC Chat == 
  | + |  | 
| − |    | + |  | 
| − | Raw notes are below. I will clean up later.
  | + |  | 
| − | <pre>
  | + |  | 
| − | [12:57pm] ilovezfs: hey
  | + |  | 
| − | [12:58pm] alanruttenberg: Hi all, following up on https://github.com/openzfsonosx/zfs/issues/102
  | + |  | 
| − | [12:58pm] alanruttenberg: "The disk you inserted was not readable by this computer"
  | + |  | 
| − | [12:58pm] alanruttenberg: Suggestions?
  | + |  | 
| − | [12:59pm] ilovezfs: so the "trick" is based on exploiting diskarbitration's being forgiving
  | + |  | 
| − | [12:59pm] alanruttenberg: do tell
  | + |  | 
| − | [12:59pm] ilovezfs: as long as one partition is "understood" then it will not give u the popup
  | + |  | 
| − | [12:59pm] ilovezfs: so right now we have 2 partitions, but it understands neither
  | + |  | 
| − | [1:00pm] alanruttenberg: how do you add one, given that I've given the whole disk to zfs
  | + |  | 
| − | [1:00pm] ilovezfs: because it's not really the whole disk
  | + |  | 
| − | [1:00pm] ilovezfs: zfs partitions it behind ur back
  | + |  | 
| − | [1:00pm] alanruttenberg: sneaky
  | + |  | 
| − | [1:00pm] ilovezfs: u get partition 1 and partition 9
  | + |  | 
| − | [1:01pm] alanruttenberg: was wondering about  that
  | + |  | 
| − | [1:01pm] ilovezfs: but it is still considered "whole disk" because if u give zfs a whole disk then it's supposed to be allowed to a) partition it b) flip on the disk cache if it can
  | + |  | 
| − | [1:01pm] alanruttenberg: (does the current version even allow giving just one partition?)  | + |  | 
| − | [1:02pm] ilovezfs: yes.
  | + |  | 
| − | [1:02pm] ilovezfs: if u built from source
  | + |  | 
| − | [1:02pm] alanruttenberg: getting there...
  | + |  | 
| − | [1:02pm] ilovezfs: there was a bug a few commits ago
  | + |  | 
| − | [1:02pm] ilovezfs: that prevented that
  | + |  | 
| − | [1:02pm] ilovezfs: but was fixed
  | + |  | 
| − | [1:02pm] alanruttenberg: I did try to build the bundle, btw, but it didn't seem to help - maybe I did something wrong
  | + |  | 
| − | [1:03pm] ilovezfs: the bundle definitely works
  | + |  | 
| − | [1:03pm] ilovezfs: if u want to go that route
  | + |  | 
| − | [1:03pm] ilovezfs: but can't guarantee it will hold up in the future
  | + |  | 
| − | [1:03pm] alanruttenberg: hmm. is there any dependency on the version? I built only the bundle.
  | + |  | 
| − | [1:03pm] ilovezfs: since apple plans not to let us write to /System
  | + |  | 
| − | [1:03pm] alanruttenberg: In any case, I'll go sneaky for now if you give me the recipe
  | + |  | 
| − | [1:03pm] alanruttenberg: not at all? It's my machine!
  | + |  | 
| − | [1:04pm] ilovezfs: yeah, tell me about it.
  | + |  | 
| − | [1:04pm] ilovezfs: lol
  | + |  | 
| − | [1:04pm] alanruttenberg: How are they going to enforce it? Might finally have to quit using OSX if they do that.
  | + |  | 
| − | [1:04pm] ilovezfs: anyway, basically u can put an exfat or hfs file system on part 9
  | + |  | 
| − | [1:05pm] ilovezfs: and then put an fstab entry to tell it not to mount that
  | + |  | 
| − | [1:05pm] alanruttenberg: so just use disk utility?
  | + |  | 
| − | [1:05pm] ilovezfs: no
  | + |  | 
| − | [1:05pm] alanruttenberg: ok. how then?
  | + |  | 
| − | [1:05pm] ilovezfs: well for going forward u could have it automatically done
  | + |  | 
| − | [1:05pm] ilovezfs: setting the type code
  | + |  | 
| − | [1:05pm] ilovezfs: but since ur stuff already exists
  | + |  | 
| − | [1:05pm] ilovezfs: we want to change it manually
  | + |  | 
| − | [1:06pm] ilovezfs: the easiest way is to use gdisk
  | + |  | 
| − | [1:06pm] ilovezfs: but that doesn't ship with OS X
  | + |  | 
| − | [1:06pm] alanruttenberg: does fink have it?
  | + |  | 
| − | [1:06pm] ilovezfs: the harder way is to use gpt
  | + |  | 
| − | [1:06pm] ilovezfs: http://www.rodsbooks.com/gdisk/
  | + |  | 
| − | [1:07pm] ilovezfs: http://sourceforge.net/projects/gptfdisk/
  | + |  | 
| − | [1:07pm] alanruttenberg: fink does. 0.8.5-2
  | + |  | 
| − | [1:07pm] alanruttenberg: any reason not to use the fink version?
  | + |  | 
| − | [1:07pm] ilovezfs: id just get the one from the website
  | + |  | 
| − | [1:07pm] ilovezfs:  Last Update: 2013-10-14
  | + |  | 
| − | [1:07pm] ilovezfs: doubt fink is up to date
  | + |  | 
| − | [1:08pm] ilovezfs:  Download gdisk-0.8.8.pkg (294.6 kB)
  | + |  | 
| − | [1:08pm] ilovezfs: see
  | + |  | 
| − | [1:08pm] ilovezfs: lol
  | + |  | 
| − | [1:08pm] alanruttenberg: hang on - remoting home
  | + |  | 
| − | [1:08pm] ilovezfs: k
  | + |  | 
| − | [1:11pm] alanruttenberg: ok. gdisk installed
  | + |  | 
| − | [1:11pm] ilovezfs: ok good
  | + |  | 
| − | [1:11pm] ilovezfs: so first pastebin output of diskutil list
  | + |  | 
| − | [1:12pm] alanruttenberg: http://pastebin.com/jUV8cfcA
  | + |  | 
| − | [1:12pm] ilovezfs: ok
  | + |  | 
| − | [1:12pm] ilovezfs: so first let's backup all of your partition tables
  | + |  | 
| − | [1:13pm] ilovezfs: gdisk uses the command 'b' for that
  | + |  | 
| − | [1:13pm] ilovezfs: sudo gdisk /dev/disk0
  | + |  | 
| − | [1:13pm] ilovezfs: you can type 'p' to see it
  | + |  | 
| − | [1:13pm] alanruttenberg: That's not one of the zfs disks. intended?
  | + |  | 
| − | [1:13pm] ilovezfs: let's just do them all
  | + |  | 
| − | [1:13pm] alanruttenberg: ok
  | + |  | 
| − | [1:14pm] ilovezfs: then type b
  | + |  | 
| − | [1:14pm] ilovezfs: and give the file a name
  | + |  | 
| − | [1:14pm] ilovezfs: say gpt-disk0
  | + |  | 
| − | [1:15pm] ilovezfs: repeat that for all of them
  | + |  | 
| − | [1:15pm] alanruttenberg: k. hang on.
  | + |  | 
| − | [1:18pm] alanruttenberg: mounted disk images too?
  | + |  | 
| − | [1:18pm] ilovezfs: u can skip them
  | + |  | 
| − | [1:19pm] alanruttenberg: ok done
  | + |  | 
| − | [1:19pm] ilovezfs: cool
  | + |  | 
| − | [1:20pm] ilovezfs: so u can change the type code with 't'
  | + |  | 
| − | [1:20pm] ilovezfs: so we're interested in first of all /dev/disk2
  | + |  | 
| − | [1:20pm] ilovezfs: and we'd like to change the type code of partition 9
  | + |  | 
| − | [1:20pm] alanruttenberg: select the partition first or start gdisk with eg. /dev/disk2s9 ?
  | + |  | 
| − | [1:21pm] ilovezfs: no
  | + |  | 
| − | [1:21pm] ilovezfs: sudo gdisk /dev/disk2
  | + |  | 
| − | [1:21pm] ilovezfs: and then type t
  | + |  | 
| − | [1:21pm] alanruttenberg: Current type is 'Solaris Reserved 1'
  | + |  | 
| − | [1:21pm] ilovezfs: right
  | + |  | 
| − | [1:21pm] ilovezfs: so that's what we want to change
  | + |  | 
| − | [1:22pm] alanruttenberg: ok. its asking Hex code or GUID?
  | + |  | 
| − | [1:22pm] ilovezfs: the hex code
  | + |  | 
| − | [1:22pm] ilovezfs: do u want to use exfat or hfs
  | + |  | 
| − | [1:22pm] ilovezfs: exfat is good because it will be obvious to u it's not an apple partition
  | + |  | 
| − | [1:23pm] ilovezfs: but bad because it has the same type code as fat
  | + |  | 
| − | [1:23pm] ilovezfs: but i assume u dont use fat
  | + |  | 
| − | [1:23pm] alanruttenberg: no, other than USB sticks, I guess
  | + |  | 
| − | [1:23pm] ilovezfs: ok
  | + |  | 
| − | [1:24pm] ilovezfs: so u want to use 0700
  | + |  | 
| − | [1:25pm] alanruttenberg: conveniently not listed by the L command
  | + |  | 
| − | [1:25pm] ilovezfs: yes it is
  | + |  | 
| − | [1:25pm] ilovezfs: first one
  | + |  | 
| − | [1:25pm] ilovezfs: lol
  | + |  | 
| − | [1:25pm] ilovezfs:
  | + |  | 
| − | [1:26pm] alanruttenberg: ok done. Just quit now?
  | + |  | 
| − | [1:26pm] ilovezfs: 0700 Microsoft basic data
  | + |  | 
| − | [1:26pm] ilovezfs: so type p
  | + |  | 
| − | [1:26pm] ilovezfs: to confirm it looks good
  | + |  | 
| − | [1:26pm] alanruttenberg:   9      1953507328      1953523711  8.0 MiB    0700 
  | + |  | 
| − | [1:26pm] ilovezfs: good
  | + |  | 
| − | [1:26pm] ilovezfs: and the other one is still zfs?
  | + |  | 
| − | [1:26pm] alanruttenberg: yes
  | + |  | 
| − | [1:26pm] ilovezfs: good
  | + |  | 
| − | [1:26pm] ilovezfs: then u can type 'w'
  | + |  | 
| − | [1:26pm] alanruttenberg: do i need a label or will osx give it a guid
  | + |  | 
| − | [1:26pm] ilovezfs: no
  | + |  | 
| − | [1:27pm] ilovezfs: we do the guid later
  | + |  | 
| − | [1:27pm] alanruttenberg: You should reboot or remove the drive.
  | + |  | 
| − | [1:27pm] alanruttenberg: The operation has completed successfully.
  | + |  | 
| − | [1:27pm] ilovezfs: perfect
  | + |  | 
| − | [1:27pm] ilovezfs: now u can see ur work
  | + |  | 
| − | [1:27pm] ilovezfs: diskutil list
  | + |  | 
| − | [1:27pm] alanruttenberg:   #:                      TYPE NAME                    SIZE      IDENTIFIER
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| − | [1:27pm] alanruttenberg:   0:      GUID_partition_scheme                        *1.0 TB    disk2
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| − | [1:27pm] alanruttenberg:   1:                        ZFS                        1.0 TB    disk2s1
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| − | [1:27pm] alanruttenberg:   2:      Microsoft Basic Data                        8.4 MB    disk2s9
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| − | [1:27pm] ilovezfs: voila
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| − | [1:28pm] ilovezfs: ok
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| − | [1:28pm] ilovezfs: now do the others
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| − | [1:28pm] alanruttenberg: ok
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| − | [1:28pm] ilovezfs: so disk3
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| − | [1:28pm] ilovezfs: disk4
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| − | [1:28pm] ilovezfs: disk5
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| − | [1:28pm] ilovezfs: let me know when ur done
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| − | [1:30pm] alanruttenberg: done
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| − | [1:30pm] ilovezfs: cool
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| − | [1:30pm] ilovezfs: now we can put a file system on them
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| − | [1:30pm] ilovezfs: the command is newfs_exfat
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| − | [1:31pm] ilovezfs: tecnically u should give it the raw version of the partition
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| − | [1:31pm] ilovezfs: but it will correct u if u dont
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| − | [1:31pm] ilovezfs: sudo newfs_exfat /dev/rdisk2s9
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| − | [1:31pm] alanruttenberg: args?
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| − | [1:31pm] ilovezfs: or u can do sudo newfs_exfat /dev/disk2s9 if u want to be "sloppy" hehe
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| − | [1:32pm] alanruttenberg: Partition offset : 1953507328 sectors (1000195751936 bytes)
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| − | [1:32pm] alanruttenberg: Volume size      : 16384 sectors (8388608 bytes)
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| − | [1:32pm] alanruttenberg: Bytes per sector : 512
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| − | [1:32pm] alanruttenberg: Bytes per cluster: 4096
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| − | [1:32pm] alanruttenberg: FAT offset      : 128 sectors (65536 bytes)
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| − | [1:32pm] alanruttenberg: # FAT sectors    : 128
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| − | [1:32pm] alanruttenberg: Number of FATs  : 1
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| − | [1:32pm] alanruttenberg: Cluster offset  : 256 sectors (131072 bytes)
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| − | [1:32pm] alanruttenberg: # Clusters      : 2016
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| − | [1:32pm] alanruttenberg: Volume Serial #  : 52a0c680
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| − | [1:32pm] alanruttenberg: Bitmap start    : 2
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| − | [1:32pm] alanruttenberg: Bitmap file size : 252
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| − | [1:32pm] alanruttenberg: Upcase start    : 3
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| − | [1:32pm] alanruttenberg: Upcase file size : 5836
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| − | [1:32pm] alanruttenberg: Root start      : 5
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| − | [1:32pm] ilovezfs: perfect
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| − | [1:32pm] alanruttenberg: will do others
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| − | [1:32pm] ilovezfs: then repeat on each of ur partition 9s
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| − | [1:34pm] alanruttenberg: ok done
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| − | [1:34pm] ilovezfs: good
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| − | [1:34pm] ilovezfs: now we can get the UUID for the file systems
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| − | [1:34pm] ilovezfs: that u just made
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| − | [1:34pm] ilovezfs: so the slick way
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| − | [1:35pm] ilovezfs: sudo /System/Library/Filesystems/exfat.fs/exfat.util -k disk2s9
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| − | [1:35pm] ilovezfs: try that
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| − | [1:35pm] alanruttenberg: 4AEF07DA-8B2B-375C-919B-2441DE07FE8A
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| − | [1:35pm] ilovezfs: cool
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| − | [1:35pm] ilovezfs: so u can do
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| − | [1:35pm] ilovezfs: sudo /System/Library/Filesystems/exfat.fs/exfat.util -k disk2s9 | pbcopy
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| − | [1:35pm] ilovezfs: and it will put it on the clipboard
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| − | [1:36pm] ilovezfs: then we make an fstab entry
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| − | [1:36pm] ilovezfs: echo 'UUID=4AEF07DA-8B2B-375C-919B-2441DE07FE8A none exfat ro,noauto' | sudo tee -a /etc/fstab
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| − | [1:37pm] ilovezfs: and repeat that for each of them
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| − | [1:37pm] alanruttenberg: k
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| − | [1:38pm] ilovezfs: and it should now shut the fuck up
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| − | [1:38pm] ilovezfs:
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| − | [1:39pm] ilovezfs: make sense?
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| − | [1:42pm] alanruttenberg: very nice, thank you. Rebooting now...
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| − | [1:42pm] ilovezfs: cool
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| − | [1:42pm] ilovezfs: i assume u dont have file vault so it can actually reboot right
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| − | [1:43pm] alanruttenberg: no file vault
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| − | [1:43pm] ilovezfs: k
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| − | [1:43pm] ilovezfs: otherwise there's other magic for that lol
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| − | [1:45pm] alanruttenberg: if remote access doesn't let me reconnect will have to check later. It's taking its time.
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| − | [1:45pm] ilovezfs: k
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| − | [1:45pm] ilovezfs: it should come up
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| − | [1:46pm] alanruttenberg: thank you very much!
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| − | [1:46pm] ilovezfs: You're welcome 
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| − | [1:46pm] alanruttenberg: Is there a wiki where I can write this up for others?
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| − | [1:46pm] ilovezfs: um
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| − | [1:46pm] ilovezfs: not really
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| − | [1:46pm] ilovezfs: i guess u could
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| − | [1:46pm] ilovezfs: https://github.com/openzfsonosx/zfs/wiki
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| − | [1:46pm] ilovezfs: lol
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| − | [1:46pm] ilovezfs:
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| − | [1:47pm] ilovezfs: does it let u?
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| − | [1:47pm] alanruttenberg: might as well return the favor. seems to.
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| − | [1:47pm] alanruttenberg: ok, later!
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| − | [1:47pm] ilovezfs: alanruttenberg: awesome
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| − | [1:48pm] ilovezfs: alanruttenberg: will look forward to the write up
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| − | [1:48pm] ilovezfs: alanruttenberg: 
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| − | [1:48pm] alanruttenberg: will drop a note in the issue when done
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| − | </pre>
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The easiest way to correct the partition type is to use "gdisk" which is distributed via Homebrew as the formula "gptfdisk" or via a pkg installer here. The gdisk subcommand for changing partition type is 't'.