How to apply GPT partition maps?

Hi.
I am trying to create a backup of my Macintosh HD to my external HD which has been partitioned into two separate drives. When I go into Disk Utility from booting up and try to restore the Macintosh HD onto the external partitioned drive which is 'Mac OS Extended (Journaled)' a prompt comes up saying "Restore Failure: Recovery partition restores can only be done on GPT partition maps'.
What does this mean and what do I need to do to make the sufficient changes in order to complete this process? Any help or advice would be greatly appreciate, Thanks.
Ravi.

In Disk Utility, with Partition tab selected, highlight the drive to partition, then select how many partitions (probably one), then click on the Options button below. There, select GUID partition table. Now finish the partitioning.
(this process deletes any files already on the drive - copy them to another drive first!)

Similar Messages

How can I covert a MBR to GPT partition map?

Mi imac don't restart after the 10.8.4 update, and the solution is reinstall OSX restoring the HD.
i'm using a external hard drive to clone the content of my HD, but its a MBR partition map, and it says that the process can only be done with a GPT partition map.
anyone who knows how to convert from a MBR to a GPT with a mac?
after converting the external HD, may i change again the partition map to his native MBR partition?
Many thanks.

Drive Partition and Format
1. Boot from your OS X Installer Disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
You can change the drive back to MBR by repartitioning it once again. Change GUID to MBR and the format to MSDOS on the Mac or do the same on a PC.

How to create GPT Partition for onekey recovery windows8

Plz any one can help me.....
i have purchased laptop last week with following configurations:
Lenovo G510 i5 2.5ghz with windows 8 and OneKey recovery feature.
My laptop was with windows 8 but i upgrade my hard drive 500 GB to 1 TB.
But now i am unable to recover my windows8 image by using OneKeyrecovery (novo).
So plz help me how to craete GPT partition style that will support for onekey recovery and recover Windows 8 image that is in my external hard drive.
Please send me the complete procedure to create GPT partition style supported for onekey recovery.
Also solve the following questions plz.
1. How to create GPT partition style supported for onekey recovery?
2. Total Number of partitions and their actual sizes.
3. Size of C:
4. Size of D:
5. Size of recovery partition
6.Size of all partitions
Plz reply me at: ********@yahoo.com
Regards: Aamir
Moderator note: email address removed to keep away from the spambots.
Solved!
Go to Solution.

Dear Customer
Welcome in lenovo community
Please use the below link to download and install the Lenovo Recovery application so that you can do what you looking for
Link : http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS035708
Thanks
Alaa
Did someone help you today? Press the star on the left to thank them with a Kudo!
If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.
Follow @LenovoForums on Twitter!

How to apply parameter map?

Ok this may seem a bit of a dumb question but I just can't get a straight answer from Googling or from the IOS release 15.2 Security Config guide for ZFW. So,I am editing the parameter map that governs tcp queue length in the OoO (Out of Order) global parameter map:
Router(config)#parameter-map type ooo global
Once I've made my changes, do I need to add this to a policy map? Or does this just go into effect by default somehow?
Thank you.

Hi Julio,
Well, I bought this ebok at Cisco Press ($14.99). I don't have a Kindle unfortunately. Normally I'd try bittorrents for this kind of thing but when it comes to business and work related material I like to keep it official.
The ebook is only 112 pages which is good since I already have the CCNA Security book from Cisco Press queued up for reading but I think this ebook will be a good starter and is probably more to the point with real world talk.
By the way, if you answer my question above, I can then Mark Correct Answer Since I have the OoO parameter map defined, do I now need to apply it? I know reading the book might give me an answer but just so I can get this particularthread off of my "to do" list I am hoping for the quick answer. I know how to apply a parameter map to a policy map, just wondering whether these global ones like the ooo one need that, or are they applied by default and so you just need to edit their configs to change how they work.

How can I reset my macs partition map?

I have an MBP mid 2012 with 750GB HD (the higher model, with i7 2.9GHz and 8 gigs of ram) which I am possibly passing on to someone. I have the latest version of Mavericks, triple booted to include Windows 8.1 and Linux Ubuntu.
To reset the computer I will likely use this method:
Step One - Back up your data:
       A. If you have any Virtual PCs shut them down. They cannot be in their "fast saved" state. They must be shut down from inside Windows.
       B. Clone to an external drive using using Carbon Copy Cloner.
          1. Open Carbon Copy Cloner.
          2. Select the Source volume from the Select a source drop down menu on the left side.
          3. Select the Destination volume from the Select a destination drop down menu on the right
              side.
          4. Click on the Clone button. If you are prompted about creating a clone of the Recovery HD be
              sure to opt for that.
               Destination means a freshly erased external backup drive. Source means the internal
               startup drive.
Step Two - Prepare the machine for the new buyer:
          1. De-authorize the computer in iTunes! De-authorize both iTunes and Audible accounts.
          2, Remove any Open Firmware passwords or Firmware passwords.
          3. Turn the brightness full up and volume nearly so.
          4. Turn off File Vault, if enabled.
          5. Use Boot Camp Assistant to remove a Windows partition, if there be one.
          6. Disable iCloud, if enabled: See.What to do with iCloud before selling your computer
Step Three - Install a fresh OS:
     A. Snow Leopard and earlier versions of OS X
          1. Insert the original OS X install CD/DVD that came with your computer.
          2. Restart the computer while holding down the C key to boot from the CD/DVD.
          3. Select Disk Utility from the Utilities menu; repartition and reformat the internal hard drive.
              Optionally, click on the Security button and set the Zero Data option to one-pass.
          4. Install OS X.
          5. Upon completion DO NOT restart the computer.
          6. Shutdown the computer.
     B. Lion and Mountain Lion (if pre-installed on the computer at purchase*)
         Note: You will need an active Internet connection. I suggest using Ethernet if possible because
                   it is three times faster than wireless.
          1. Restart the computer while holding down the COMMAND and R keys until the Mac OS X
              Utilities window appears.
          2. Select Disk Utility from the Mac OS X Utilities window and click on the Continue button.
          3. After DU loads select your startup volume (usually Macintosh HD) from the left side list. Click
              on the Erase tab in the DU main window.
          4. Set the format type to Mac OS Extended (Journaled.) Optionally, click on the Security button
              and set the Zero Data option to one-pass.
          5. Click on the Erase button and wait until the process has completed.
          6. Quit DU and return to the Mac OS X Utilities window.
          7. Select Reinstall Lion/Mountain Lion and click on the Install button.
          8. Upon completion shutdown the computer.
But, due to having three partitions on my computer and multiple operating systems installed, I at some stage needed to mess with the partition map (I remember doing this at one point: Repairing Boot Camp after creating new partition). Will using the above steps completely reset any custom "bios" I had installed and reset the partition maps/remove all partitions (Assuming I likely delete all the partitions and then re allocate all the space to OSX?
And if the above would not work, what do I need to do to remove these and will it be possible to restore the mac fully to the "factory default"?
Thanks,

So this will completely overwrite any of the steps in this process?
sudo gdisk /dev/disk0
If you get any error messages at this point, report the error messages, don't proceed further.
You're now in gdisk interactive mode. Menus/commands are single characters followed by return/enter. So type ? and <enter> and you'll get the main menu listing commands. Type p <enter> and it will print (display) the current GPT. Since you have 5 GPT entries, you can't use a 1 for 1 GPT to MBR scheme like Apple does. The following suggestion is safe, but all hybrid MBRs are non-standard inventions, and therefore I can't tell you how Boot Camp Assistant or Disk Utility will react to this hybrid MBR should you decide to make changes later. What I can tell you is Windows, Linux, and Mac OS X themselves have no problem with this MBR scheme.
r <enter>        go to the recovery & transformation menu
h <enter>        create a new hybrid MBR
5 <enter>        add partion 5 to the MBR
<enter>          accept the default MBR hex code of 07
y <enter>        set the bootable flag
n <enter>        do not protect more partitions
o < enter>       print (display) the MBR
You should have two entries. One type EE, one 07, with the 07 entry marked with * under Boot. If you don't, report back. If you do, write out the update partition information, and hope a power failure doesn't occur for the next few seconds...
w <enter>     write partition table to disk
reboot. hold down option - you should be able to boot into either Mac HD, Recovery HD, or Windows.
I just tested this same five partition GPT and 2 partition MBR on a working system and the instructions above worked.
Note, so long as CSM-BIOS and thus MBR are required for Boot Camp instead of EFI booting Windows, we're stuck with flaky MBR problems, as well as the 2TB disk limitation for Windows boot disks.
If so, problem solved, thanks!

Disk format GPT and Apple Partition Map Upgrade questions

I was told that switching to the new computer with snow leopard that I would need to reformat my drives from my G5 to GPT (GUID Partition Table) from Apple Partition Map (APM) to get time machine to work (see http://discussions.apple.com/thread.jspa?threadID=2706634&tstart=0)
<<Intel Macs boot to either, but PPC Macs only boot to APM. Intel Mac software (OS) installer only want to install and update to GPT, so if you want to use existing drives to install OS X SL to, you will need to reformat the drive.>>
Disk utility is only giving me Mac OS Extended options, which I thought was my drive format already. So what do I do now? do I erase those drives or what? I'd rather not if I don't need to.

Hi-
The Erase window only offers the formatting scheme.
The Partition Tab offers the selection of GPT or APM partitioning scheme.
You don't have to partition beyond one partition if you don't want to.
Just make sure GPT is selected and the apply.

[SOLVED] How to use GPT GUIDs for referencing partitions in /dev?

Hi all,
I wanted to know whether it is possible to use Unique Partition GUID of a GPT partition to setup /dev/disk/by-part-uuid (something like that) and using that path in the bootloader config's 'root= ' kernel parameter.
It is possible to obtain those GUIDs from gdisk (or maybe from blkid in util-linux-ng - not sure). But how to make udev setup /dev/disk/by-part-uuid like dir with these GUIDs.
Main info http://marc.info/?l=linux-hotplug&m=129425482207292&w=2 and http://git.kernel.org/?p=linux/kernel/g … b78fc0e100 (currently in 2.6.37 only - but this commit will not work since in Arch initramfs is used). Thanks in advance.
Last edited by skodabenz (2011-06-11 12:26:08)

Encypted partitions (not that I use). Also searching will be faster (although not noticable), as parsing partition table is faster than parsing each filesystem and obtaining UUID. See http://www.mail-archive.com/grub-devel@ … 15218.html and http://www.mail-archive.com/grub-devel@ … 15228.html
Last edited by skodabenz (2011-01-08 21:17:39)

Imac not booting, Able to get to disk ulility with snow leopard disk. Tap on had disk, not given choice to do anything. Information list that smart is certified and partition map is us formatted. How do I get mac to start up again?

Imac not starting up, keep getting white screen. Using snow leopard. Able to get to disk utilities with snow leopard installation disk. Tap on had disk, not given choice to certified disk or anything else. Information on disk states that smart status is certified. Partition map I formatted. Also tried to restore from back up, but get error: not enough disk space. Tried to erase disk, but unable. What do I do next to get mac to start up?

Thank you. That's what I thought will need to happen.
One more question. I tried using the Apple install disk that came with the computer. It's an OS 10.5.6 disk. It does not see my 10.6.8 system internal hard drive to repair. All it see's is itself 10.5.6 disk. Do you think I can use a 10.8+ disk utillity since that is a higher system it will see the 10.6.8. Where the 10.5.6 does not?
I don't want to turn the computer off for fear I'll get the question mark again. P-Ram got me going last time but for how long I don't know? It would be nice to be able to turn the computer off for the night and startup as usual to give it a rest and try to reset itself.
Thanks for your help, I know I will eventually need to re-install. But I am in the middle of a project with tight deadlines and all I can do right now is back-up. Trying to migrate to another computer temporarily to finish the job. That's a lot of extra work in the short time also.
Just trying to put a band-aid on it for another couple weeks.

Messed up partition map with iPartition - how to fix?

I was trying to change the partition map on my external USB HDD from Apple Partition Map to GUID so I would be able to create a FAT32 partition on it to be accessible from windows. I used iPartition to do so (through a bootable CD as it doesn't yet work on Leopard), but it told me it was "unable to write the new partition scheme".
Then, when I booted back into OS X, it told me that the drive could not be read, and under disk utility its partition map shows up as "Unformatted". I have a lot of important files on this drive, and only some of them are backed up. Is there any way I could fix the partition map of the drive? I'm pretty sure the files themselves are intact, I just don't know how to get to them.
I'm not a very experienced mac user. If this had happened under windows, I might've been able to fix it, but unfortunately I'm at a loss :S Any help would be greatly appreciated!

You have only one option. You will have to boot from your OS X Installer Disc One and repartition the drive using Disk Utility. All your data will be lost, unfortunately.
You cannot change a partition map on the fly, and you cannot use partitioning software that is not compatible with Intel Macs and the GUID partition scheme.
As for recovering your files read the following:
Basics of File Recovery
If you empty the Trash the files are gone. Recovery is possible but you must not allow any additional writes to the hard drive - shut it down. When you delete files you erase only the directory entries, not the files themselves. However, the space occupied by the files has been returned to the system as available for storage. Writing to the drive will then eventually overwrite the space once occupied by the deleted files in which case the files are lost permanently. Also if you save a file over an existing file of the same name, then the old file is overwritten and cannot be recovered.
If you stop using the drive it's possible to recover deleted files that have not been overwritten with recovery software such as Data Rescue II, File Salvage or TechTool Pro. Each of the preceding come on bootable CDs to enable usage without risk of writing more data to the hard drive.
The longer the hard drive remains in use and data are written to it, the greater the risk your deleted files will be overwritten.
Also visit The XLab FAQs and read the FAQ on Data Recovery.

How to set up Apple Partition Map not to be a Master Boot Record

Hi.
In order to copy Leopard install disk to a flash drive I need format the 8 G Cruzer (on which the U3 was removed) to set up Apple Partition Map not to be a Master Boot Record to be bootable on my Quicksilver G4. I never used partitioning before, step by step please.
W.W.

Hi, motsteve -
Forget booting USB on any G4
USB booting is possible on all G4s and later models starting with the G4 (AGP) models, per -
Article #58430 - USB Info and Benefits of Dual-Channel USB
I think I read somewhere (couldn't find it just now) that the earlier versions of OSX are not USB bootable, so booting to USB on G4s might need to be by using OS 9.
I've never tried USB booting. However, I have made a bootable Zip100 disk for my G4/500 (AGP), using its internal Zip drive. Did it just to see if it would work - it does. There's a fair amount of room left over on the 100MB disk, too.
Intel-based machines are also USB bootable, per this article -
http://support.apple.com/kb/HT1948

How to low-level format entire drive, including partition map?

Hi everyone,
I have an OWC-supplied, 80 GB, ATA hard drive (OWC Neptune), which originally shipped in an external, FireWire 400 case. The drive stopped working; disassembly of the case led to the discovery of a burned trace on the Oxford bridge. While the bare drive itself has no manufacturer name, its label style and model number listed on the drive clearly show it to be a Maxtor 6Y080L0, 80 GB.
Having removed the drive and installed it into a test Power Mac G4, the physical drive is recognized by Disk Utility (albeit with no partitions, mounted or otherwise). The drive emits "normal" power and spin-up sounds, with no clicking or other sounds that might normally indicate a failed drive. However, Disk Utility is unable to actually partition the drive—when attempted, the "Creating Partition" progress bar advances to about 1/8 of the way across, then moves no further (even if many hours are allowed to pass). Console reveals nothing as to what is stopping the format.
Moving further, I attempted to blow away the partition map with pdisk, but encountered several read errors in the partition map itself. I even went so far as to attempt to "build" a partition map, one partition at a time, based on the settings I found on an identical drive that is functioning properly. Although this seemed semi-successful, attempting to write the partition table again resulted in a couple of errors.
pdisk: Unable to write block 8 (Input/output error)
pdisk: Unable to write block 9 (Input/output error)
pdisk: Unable to write block 10 (Input/output error)
pdisk: Unable to write block 11 (Input/output error)
While it's entirely possible that the blown component on the FireWire bridge might have also taken out the drive, I'm not a big believer in coincidence and my thought is that the trace blew during an access of the partition map, corrupting it to the point that only a low-level format of that portion of the drive can potentially salvage it. There is no data on the hard drive I am worried about losing, but I'm not one to easily say "die" and so I'd like to be able to restore this drive to functionality, if at all possible.
So after setting the table for you here, my questions are as follows:
1. Is there any way to low-level format an entire drive that does not have a readable partition map? In essence, effectively returning the drive to something resembling an out-of-box, unformatted state? CLI is fine, and I'm even open to trying to throw the thing in a PC box, install Yellow Dog Linux so as to have GUI access to pdisk, etc.
2. Does anyone have any other suggestions for me regarding this matter?
Thanks much for the time,
MBJ

Thanks to all for the suggestions. I'm about to give up on it, although I will try the PowerMax software recommended by Michael Black.
And The hatter: Don't let this burn you on Neptune drives—one of my client offices has been using about 20 of them for the past couple of years now, on a daily basis, for large-scale imaging projects, and the little drives have been real champs. We're even using them to dual-boot both Intel- and PPC-based systems, and they've just been outstanding. Methinks the component failure probably cascaded down to the drive, and while yes, it *****, such things happen in any batch of components and I'd buy another Neptune today if I had the need for yet another external.
As for Matt Broughton: S.M.A.R.T. shows no problems when the drive is connected directly to the ATA bus. But then again, I've only run into a few drives that S.M.A.R.T. has ever reliably reported on—it's still a black art, to be sure. The WikiPedia article on S.M.A.R.T. goes into more detail about its pervasive flakiness.
For now, the drive has begun to beep about once every 2 seconds at boot. This lasts for about 30 seconds, after which the drive continues to spin but no further beeping is heard. The drive no longer shows up in Disk Utility, even as an unmounted drive/volume. So, I'll probably try it in a PC w/PowerMax just to say that I did, but beyond that, it's probably ready for disassembly as an example drive.
80 GB—sniffle…
Thanks again to all for your suggestions!
Take care,
MBJ

Install error : disk cannot be used to start up your computer [or] MediaKit reports partition (Map) too small

Greetings,
I am aware that this problem has been discussed, but in long and vague discussions that I had to sift deeply to find an answer. Therefore I am posting a clear message, as this problem can be very troublesome for someone who just received a Mac OS installation disk and cannot install it.
Situation : you cannot install/update your new system because the installer does not consider your volume.
Error message : this disk cannot be used to start up your computer.
Version française : Ce disque ne peut pas être configuré pour démarrer votre ordinateur.
Also discussed below error: "MediaKit reports partition (Map) too small"
Note : although this occurred with a Snow Leopard (10.6) install DVD, it can alo occur with Lion (10.7) according to discussions on Apple web site.
IF YOUR CONDITIONS ARE AS FOLLOWS :
- You are using an official Apple installation DVD of Mac OS 10.6 (Snow Leopard) [or 10.7 Lion] or an official download/upgrade of those systems.
- Your main Mac partition scheme is in GUID as it should be (check with Disk Utility). That partition contains a Mac system that can start-up.
- Your volume format is: Mac OS Extended (journaled) [the format should not be Case Sensitive.]
- You have the hardware requirements to install Mac OS 10.6 (Intel processor; internal or external DVD drive or a linked DVD drive; 1 GB of RAM; a screen controlled by your computer graphics card; at least 5 GB space on the hard disk or 7 GB if you install all components).
- Using Disk Utility, you of course tried the disk Repair Tool and the Repair Permissions tool.
- Your hard disk does not have a file called Backups.backupdb (if it does, this means Time Machine has once used this hard disk for its back-ups). Anyhow, if it were the case, the installation would give a different error message (with the word TimeMachine). This file may block the installation: Apple Support suggest to place it in the garbage, *without* deleting it, and placing it back on the disk later. Mind you, if you do not use this hard disk as such to save your Time Machine back-ups, you can simply delete this file.
HOW TO FIX :
1. Boot with the 10.6 install DVD (Tip: you can either select Mac 10.6 as the boot DVD in your Start-up Preferences or simply press down c during the start-up).
2. Above the install screen, you have a Utilities tab from where you can run Disk Utility. Select your hard disk and select the Partition tab. Resize the primary Mac partition (don't add a new one) by decreasing it by about 5 GB.
It will look like this http://i.imgur.com/jHTbr.jpg
( That image shows only one partition, but the same principle applies even if you have two or more partitions on your disk.)
Also see the official Apple how to: http://support.apple.com/kb/TS3926
Version française: http://support.apple.com/kb/TS3926?viewlocale=fr_FR
3. Commit the change by hitting "Apply"
3.b. If you get the error "MediaKit reports partition (Map) too small", this is a rare error where the partition that follows (for example Bootcamp) is slightly overlapping your main Mac partition. You will need to reduce that other following partition. Once you have reduced the other partition, you will probably need to return to step 2 and 3 and try again.
[ For example, in my case, I had resized my Bootcamp with CampTune software and it would seem that the file system ended-up somehow larger than the actual partition container. I simply asked CampTune to reduce the partition a bit (barely 2 GB) and that fixed it.]
4. Reboot, again into the 10.6 install DVD.
5. You can then install 10.6.
6. Once 10.6 is installed, use the Disk Utility on the desktop (you can boot into the primary HD at this point) to resize the primary partition back to its original or maximum size.
SOURCE (main fix): http://forums.macrumors.com/showthread.php?t=774410 [and] http://support.apple.com/kb/TS3926
SOURCE (explaination for MediaKit error): some Apple discussion post.
nb: in my case, it was on a MacBook Pro (late 2008).

GasMan4932 wrote:
When I click on the icon for this drive, the warning message below states "Mac OS X cannot be installed on 'iMac HD', because this disk cannot be used to start up your computer." Obviously that's not true, since that's where the OS is installed.
How did you partition this drive, if you did that? Does it contain start up or utility partitions for any other OS (for instance Linux)? There have been reports that the "cannot be used to start up your computer" message will appear if a third party utility was used to create a 'triple boot' system or such, apparently because SL is picky about the format GUID partition scheme table info & how partitions are allocated space on the drive by other formatting/partition methods.
For some users with these partitions, the fix has been as simple as "tickling" (slightly changing) the partition size of some partition with Disk Utility, which apparently updates the GUID partition scheme table info so that the SL installer accepts it as safe to use with SL.( In this sense, the message may be trying to say the installer thinks the disk can't be used to reliably start up your computer with SL, not in general.)
See the discussions topic Cannot install Snow Leopard over 10.5.8 for more about this.

Disk Utility error "Mediakit reports partition map too small. 3TB

So I have a Mac Pro with a 3TB inside, but Snow Leopard won't recognize the whole 3TB. I can format it, but it only allows 801.23 GB. The remaining space is left as Free Space. When I try to resize the Volume, I get this:
I get this error: " Partition failed with an error." MediaKit reports partition (map) too small.
Can someone help me find a way to utilize the 3TB as it was intended to?
My setup:
MacPro1,1
10.6.8
ST3000DM001-1CH166:
Capacity:          3 TB (3,000,592,982,016 bytes)
Model:          ST3000DM001-1CH166
Removable Media:          No
Detachable Drive:          No
BSD Name:          disk0
Rotational Rate:          7200
Medium Type:          Rotational
Bay Name:          Bay 1
Partition Map Type:          GPT (GUID Partition Table)
S.M.A.R.T. status:          Verified
Volumes:
Capacity:          209.7 MB (209,715,200 bytes)
Writable:          Yes
BSD Name:          disk0s1
BK:
Capacity:          801.23 GB (801,225,752,576 bytes)
Available:          737.7 GB (737,702,121,472 bytes)
Writable:          Yes
File System:          Journaled HFS+
BSD Name:          disk0s2
Mount Point:          /

Anyways, i've made it work. My process was this:
Problem:
1. I put MacPro into Target Disk Mode to mount to my 2011 MacBook Pro. Disk Utility on MBP would only see 800GB.
Solution:
2. Booted the SL CD on the MacPro and ran Disk Utility from there. In the partitions tab, I chose 1 partition, and hit apply.
3. "could not unmount disk."
4. So I tried to partition it again, and it worked this time. 3TB Available.
5. I then booted the MacPro using an external HD with OSX on it to run CarbonCopyCloner to reimage my backup.
I hope this helps anyone else with the same problem.

GUID vs. Apple Partition Map

On my new Mac Pro the G-Raid3 will not mount in eSATA. It's fine in 800 Firewire. Out of the box it was set for Apple Partition Map and worked fine on my previous Intel Mac Pro on the same eSATA card.
Suddenly on the new MacPro it doesn't mount. G-Technology told me I have to repartition it as GUID. They said I have to select "Free Space" first and then proceed normally. (It's a 3-TB drive Raided internally.)
Now I checked a Time Machine backup disk I am using on my laptop. That also is Apple Partition. The laptop itself is GUID.
If we're going to keep up to date in an Intel world, is it wise to get all the drives into GUID format?
And what about Free Space? Should that be chosen every time? Why not just OS X Journaled?

Check on TimeMachine specs, I thought it req'd GPT(GUID).
GPT is a better 'modern' partition format and features.
I've never been much of a fan or in favor of multi-interface, handy for home users.
G-Tech's advice. The only way to change a drive to GPT from APM is
click on drive (not volume partition)
change from "current partition" to anything else, ie, "free space"
So that the OPTIONS.... will be available at the bottom.
Click OPTIONS
change to GUID and click APPLY
Change partitions to what you need. Mac OS Extended (journaling)
Click Apply.
Destroys any data.
Things that worked in older Mac Pro may need firmware or driver updates. So your controller might - and please include things like what controller you use.
http://www.apple.com/support/leopard/timemachine/

Partition Maps.

I am not really confident about using Disk Utility when it comes to Multiple Volumes and I have had many problems.My first was with NEC 4 GB trying to get two Language versions of W98 and mixing files.
However Mac seems easy ,but I want to bring this topic up because I do not find much about unusual Partition schemes.
One issue is using Disk Utility from the Gray Install DVDs part of the Bundle that came with the computer. And when you install and update and use Disk Utility from the Applications, I keep reading conflicting advice on which we should use to repair permissions and Disk. It sounds logical to repair from an external source but the original DVD is not updated and after a chunk of updates on certain OSX from 10.4 to 6 with Java and so on the OS has changed from the original DVD and so repairing permissions needs using the one in Applications.
When it comes to repairing the Partition map ,then it is difficult because if I use my 10.6 to partition 4 partitions on a 500 GB HD then install Lion,mountain lion , and the dreaded Mavericks that crippled my partition map. so in that order then So after ML the Partition Map changes ,it hides the Physical HD and the 2 lions are faded because if you use the Snow leopard DVD Disk Utility it can not mount them. That is obvious but how can I repair the Partition map created by Snowleopard or is there another way around this ?
Apple is going too fast ,every time I get used to using an OS and each one has different programs And W D warned against using Mavs with Hard disk.

Hi there!
Both Macs should be able to use the drive if it's partitioned
and then formatted with the HFS+ which both can see. And
if you intend on being able to use the externally enclosed
hard disk drive as a bootable drive (for reverse diagnostics
and also making bootable system clones or copies) it may
be better if the unit has a boot-capability and is FireWire.
The Intel® Mac would probably do OK with a USB 2.0 as
a bootable external; but the PowerPC G-series needs FW.
Some externals with FireWire and USB 2.0 can support
booting from them, given proper partitioning. When you
go to buy a drive, be sure they have a good return policy;
in case someone says their drive will do this & that, but
later shows it can't or won't. I like my LaCie FW Porsche
external, w& its own AC power supply, for PPC boot clones.
If you do more than just off-machine archives, the partition
scheme and other details become more important. And the
ability to make and use bootable clones of OSX can be nice.
(Rules apply; so if you go there, read up on this aspect.)
Good luck & happy computing!
{PS: This section of Discussions is actually about Tower PMac G4 & G5s.}

How to apply GPT partition maps?

Similar Messages

Maybe you are looking for