Encrypting an external disk with two partitions

I have a large external disk that I'm going to be using for Carbon Copy Cloner backups. I want the disk to have two partitions, and I want the whole thing to be encrypted with Full Disk Encryption. Should I (a) first partition the disk and then encrypt each partition, or (b) encrypt the physical disk and then partition the result? I think (a) is the best path (it looks like it's at least possible), but advice would be appreciated -- thanks!

Hi,
according to this http://support.mediafour.com/entries/170474-macdrive-compatibility-with-hard-dis ks-with-multiple-partition-types-i-e-dual-format that 'feature' is currently not supported by MAcDrive.
Regards
Stefan

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Lion 10.7.4 on an external drive with 2 partitions

I have an external drive with 2 partitions one of which is used for Time Machine Backups. The other is 300 gigs and I want to install lion on it for study but the installer will not let me do that. It might be because of the larger partition that I use for Time machine but I don't see why as it is a separate volume on the same drive. I keep getting the not able to install the recovery HD message. I also made sure to erase and reformat the drive (journaled extended). Any ideas why I can't do this?

Hey Kap
Tried to shrink the volume by 2 gigs but I get a partition failed error: This operation requires a newer version of Mac OS X for this disk. I am running 10.6.8 on my cpu and the partition is empty as I erased it. also it is extended (journaled). I don't understand this message. wierd.

I have just upgraded to Mavericks and have been using Time Machine on an external disk with Snow Leopard. Can I continue to backup with Time Machine on the same external disk or do I need a new disk since the operating system has changed?

I have just upgraded to Mavericks and have been using Time Machine on an external disk with Snow Leopard. Can I continue to backup with Time Machine on the same external disk or do I need a new disk since the operating system has changed?

Hi there,
I found that Time Machine in Mavericks will sort it all out for you. You shouldn't need to buy another backup drive, unless you have insufficient space left and can't afford to delete whats on there. It should just work fine.

I have a new macbook pro 2,6 Ghz i7, 8GB 1600Mhz internal ram. He will not boot from an external disk with operating system Snow Leopard

I have a new macbook pro 2,6Ghz i7, 8GB 1600 Mhz internal ram, but he will not boot from an external disk with operating system Snow Leopard.

These Macs shipped with 10.7, and will run nothing older than that:
MacBook Pro
Date introduced
Original Mac OS X included
(see Tips 1 and 3)
Later Mac OS X included
(see Tip 1)
Mac OS X Build(s)
(see Tip 2)
MacBook Pro (Retina, Mid 2012)
Jun 2012
10.7.4
11E2068
MacBook Pro (15-inch, Mid 2012)
Jun 2012
10.7.4
11E2617
MacBook Pro (13-inch, Mid 2012)
Jun 2012
10.7.4
11E2617
MacBook Pro (13-inch, Late 2011)
Oct 2011
10.7.2
10.7.3
11C74, 11C2002, 11D2001
MacBook Pro (15-inch, Late 2011)
Oct 2011
10.7.2
10.7.3
11C74, 11C2002, 11D2001
MacBook Pro (17-inch, Late 2011)
Oct 2011
10.7.2
10.7.3
11C74, 11C2002, 11D2001

Backup to external disk with disk utility

Hello,
I'm looking to back up a iMac with 10.3.9 to an external usb disk drive. Unfortunately, I'm not having much success. I boot to the install disk, then pick "disk utility", and go to the restore page. Then I drag my Mac HD on the source, which works fine, but I'm not able to get the destination correct. Here's the deal with the disk though. I have three partitions on it. I have a 1st partition which is fat32; the second is ext3 where I have Ubuntu; the 3rd is a linux swap partition.
I was hoping that I could save to the fat32 partition without clobbering the data there, but I wasn't even able to try it, because Disk Utility came back with an "error 19". I'm not sure what that is, but I assumed that Disk Utility doesn't play with fat32. So I then used Gparted to create an empty 4th partition with HFS+ format. I thought that that would work, but while Disk Utility "sees" that partition (it shows up on the left side, although without the correct partition name), it will not let me drag it to the restore->destination box.
So, couple of questions. Does anyone know if:
1) Does the destination of the Disk Utility backup have to be the first partition on the external disk?
2) Does the destination partition have to be HFS+?
Thanks.

I've got 3 partitions on a 500gb external drive plus the one internal hard drive on my iBook. I always make sure I keep a backup of both Leopard and Panther OSX. So if I have Panther on the internal HD then I have only one copy of Panther and two leopard copies on the externa HD. The mac doesn't seem to care what order the partitions are in since it treats each partition as a separate drive.
Yes, the destination has to be hfs+ but you can get disktuil to format the partition which will only format that partition and will not affect any other partition on the drive. Be careful to select the proper partition!
The recommended procedure is to format as journalled hfs+ (diskutil can do this) because diskutil will sometimes make an unbootable backup if you only erase the partition instead of formatting the paritition. That was the mistake I made and found the problem listed in carbon copy cloner's files. The problem is that for some reason, firewire external drives are not always bootable because of the issue OSX has with those types of drives. The only solution was to format the partition as hfs+ and try restoring from your boot drive to the newly formatted hfs+ partition. Worked for me.
As far as I know, Panther OS can't format a drive/partition as a windows drive. Leopard OSX will though and has no issues with formatting flashdrives or any other drives or partitions as microsoft windows DOS format. It can also write/read from windows formatted drives but Panther OSX can't as far as I know.
Oops. I guess I'm wrong. This from the diskutil help files...
You can use Disk Utility to format an *entire disk* in Windows (MS-DOS) format, but *you cannot format a single disk partition in Windows format.*
WARNING: To prepare a disk in Windows format, you must erase the entire disk. Be sure to copy all the information on that disk before you erase it.

Format External Drive with 2 partitions (NTFS & Mac OS Extended)

I have a 300GB external hard drive. I need to format it into 2 partitions so I can backup my PC and my Powerbook.
I need two partitions:
1 x Mac OS Extended 75GB
1 x NTFS 225GB
Does anyone know how to do this (possibly with 3rd party software)?
I have Partition Magic on the PC.
Thanks.
17" Powerbook G4 1.67 GHz Mac OS X (10.4.5)

greg:
I think you are more likely to get help if you post your topic in the hardware forum for the 17" G4 PB.
Good luck.
cornelius
PismoG4 550, 100GB 5400 Toshiba internal, 1 GB RAM; Pismo 500 OS (10.4.4) Mac OS X (10.4.5) Beige G3 OS 8.6

Macbook Pro 10.7.5, need to clone hard drive with two partitions?

I have a Macbook Pro running 10.7.5. I have two partitions on the current 750GB drive and just purchased a Samsung 750GB SSD. I want to do an exact clone to the new drive but am struggling with the fact that I have two partitions on the current drive and seemingly all the advice talks about cloning the Macintosh HD only.
I need to clone both partitions to the new SSD. I can't, don't want to, reinstall anything.
Is there a way to clone the entire drive, not just the boot partition?
Thanks!!!

bubsnews wrote:
...Weird as all the word on the internet is how difficult it is to clone the Win installation, am I missing something?...
When cloning difficulties with Win installations are discussed, it's almost always Boot Camp. Virtual Machines are just really big files which can be copied and moved like any other file (though Parallels or VMware Fusion will detect that and ask if you've copied or moved the file and getting the answer right is important). That's just one of the many virtues of virtual machines - easy cloning and duplication.
... All reports show the EVO as the faster of the two drives but I swear the M500 is much faster on my desktop (Win7 Pro) than the EVO was. I mean they both are fast but, as an example, launching DVD Profiler Pro with over 4,000 entries would take the EVO 19 seconds or so, but the M500 does it in about 13 seconds...
That is puzzling because looking at this review for example, the Samsung does come in ahead of the M500 most of the time.
...Do you have any other advice to ensure I'm getting the most out of the SSD and my Macbook, 10.7.5?...
Normally I'd suggest activating TRIM but you've already done that. And while any update would disable TRIM, if you're using TRIM Enabler, that pops up to let you know TRIM needs to be turned on again. But since you've reached the end of the update line with Lion, that only applies if you move to Mountain Lion or Mavericks. However, if you're booting from a different drive to work on the SSD, TRIM needs to be enabled on that drive too. Even if it's a HD, the OS will use TRIM on the SSD you're working on.
The only thing that comes to mind is not to fill the SSD to the brim with files. There are fundamental differences between SSD's and hard disks and for best performance, that needs to be respected. This discussion goes into some detail so you can appreciate what the SSD controller has to do.

Mirror boot disk with soft partitions

We've been investigating Solaris Volume Manager with Solaris 9 and have some questions. We currently use DiskSuite 4.2.1 to mirror our boot disks on Solaris 8. The fact that SVM is integrated into the kernel on Solaris 9 got us thinking. Here are some questions I would greatly appreciate answers to:
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2. What would the problems be with this? The major one we could foresee is not being able to see your /root, /var and swap partitions in the case of having to boot from the CD, but if SVM is in the Solaris 9 kernel, wouldn't that solve that issue. Is this a problem? Are there other issues/problems we're not thinking of?
3. Finally, is having your boot partitions be mirrored soft partitons a supported configuration from Sun?
Thanks,
Bob Jones
[email protected]

Hi,
micmac95 wrote:
The reason the HDD is split into two partitions is so if there is an error with the OS, they can reinstall it without affecting the user files.
Makes sense in a way. But does this 'they can reinstall...' imply that you don't have the OSX Install DVD for your Mac ?
Cause you need that DVD for installing the BootCamp Drivers of it !
I do have admin, and I can re-partition my HDD, but I cannot touch the OS partition.
If I set it up like this: http://micmac95.fileave.com/HDD%20setup.png , by shrinking the USER partition, will I be able to install windows on the BOOTCAMP partition?
Personally I never tried this 'Shrinking one partition to make another partition' approach with BootCamp.
But, if you don't have one now is the time to make a complete backup of all the things on your Mac !
Before 'fumbling' with partitions I always make sure to have a backup.
Stefan

Multiple disks with identical partition names

(cross-posted from the Mac Ach:)
Just a day before the announcement of the FW800less BunnyBooks, I bought me an FW800 external, to boot my PB off while working at home.
I intend to clone my internal to it, keeping the same organisation in which for instance I have partitions OSX1 (root) and OSX2 (case sensitive), with a softlink work -> /Volumes/OSX2/Users/bertin/work in my home directory. Rather than calling my external partitions OSX1e and OSX2e (for instance), and having to modify all my links, I'd prefer to call the external partitions OSX1 and OSX2 too. (This means I could keep the 2 disks synchronised easily.) OS X handles this correctly by changing the mountpoint name in /Volumes on the fly.
My question is about the mount order during booting. When I boot from the external, its partitions will be /dev/disk0s*, but does that mean that /Volumes/OSX1 and /Volumes/OSX2 will be guaranteed to point to the external disk's partitions (and to the internal disk's when booting off that one)?
Thanks,
René

(cross-posted from the Mac Ach:)
Just a day before the announcement of the FW800less BunnyBooks, I bought me an FW800 external, to boot my PB off while working at home.
I intend to clone my internal to it, keeping the same organisation in which for instance I have partitions OSX1 (root) and OSX2 (case sensitive), with a softlink work -> /Volumes/OSX2/Users/bertin/work in my home directory. Rather than calling my external partitions OSX1e and OSX2e (for instance), and having to modify all my links, I'd prefer to call the external partitions OSX1 and OSX2 too. (This means I could keep the 2 disks synchronised easily.) OS X handles this correctly by changing the mountpoint name in /Volumes on the fly.
My question is about the mount order during booting. When I boot from the external, its partitions will be /dev/disk0s*, but does that mean that /Volumes/OSX1 and /Volumes/OSX2 will be guaranteed to point to the external disk's partitions (and to the internal disk's when booting off that one)?
Thanks,
René

How can I back up to an external drive with three partitions using Time Machine?

I have an external drive connected to my MBPro. The external drive has three partitions: one dedicated to the MBPro, one dedicated to my iMac and one for Photos. How can I be sure that when I backup my MBPro, it does so to the dedciated partition?
Also, I eject each of the partition icons on my desktop through the Eject selection in Finder menu and then I turn off the external drive and disconnect it. However, when I connect and turn the external drive to start it up again, the a message comes up that it has not been ejected properly. How am I supposed to eject the partitions and drive?
Thanks for you helpl
Vernon

When you set up time machine you should select which partition to backup to, after that it should be automatic, mine is.
I have not encountered your second problem, after ejecting the disks do you immeadiatley switch the drives off or leave them for 10-15 seconds to let them write the info stored on the disk drives internal buffer to disk?
I usually use the CNTL Click on the drive and select eject, but that should not be any different than using the Finder menu.

Accessing shared time capsule disk with two accounts

Hey guys,
I have an airport time capsule (5th gen) and want to access a connected USB disk with my Mavericks macbook. This basically works fine: i can mount it using the finder (usually I do an automatic mount when starting my account, since I put the drive into the Login Items for my user), and the disk is secured with a disk password.
However, I have a quite annoying issue when using two accounts on the same macbook, which is my standard use case as I share the macbook with my wife: Only the user that first accesses the disk can use it, the second user gets a "no access permission" error for the disk. The second user can then disconnect the drive and reconnect, but I find this very annoying, because I have to do it all the time, and I'm wondering if I'm the only user with this problem.
Is there any way to specify access rights for the drive, such that I can access it with both accounts simultaneously? BTW, I've already tried to define specific access rights on the disk (Context Menu > Get Info > Sharing and Permissions), and I tried to change the disk security mode to "With accounts" and "With device password" - none of it made any difference.

Only the user that first accesses the disk can use it, the second user gets a "no access permission" error for the disk. The second user can then disconnect the drive and reconnect, but I find this very annoying, because I have to do it all the time, and I'm wondering if I'm the only user with this problem.
That is how Apple built it. No fixes.. no repairs.. it is a hassle of protected type file systems. Windows you can do all sorts of fudgery.. but the lack of protection (amongst others) is why you use a Mac.
Is there any way to specify access rights for the drive,
This is not a rights issues.. it is that one user at a time is allowed. Each user must logout before the next user can gain access..
I do not know of any workaround.
Pondini recommends using disk image for data on the TC.. since you can otherwise mess up the TM backup. See http://pondini.org/TM/TCQ3.html
His comments don't apply to your usage of the USB drive.. but his workaround may help.
I am wondering if you create the sparsebundle on the USB drive and allow everyone access, once mounted on the computer it might allow two user accounts access at the same time.. Sorry I have no need to try it and I cannot recall anyone attempting.. but it might present a way around the issue.. !!

How to access a shared disk with two users account on same Mac

I am seeking how to share / access at same time with two accounts on a same Mac a disk that is shared with a TC or an AEBS. When a user account is connected to the shared drive and when I switch to the 2nd user this 2nd user cannot access / see the content of the shared drive and it receives an error message. I want to use this shared drive to store some GB of movies I do not want to have on my MacBook Pro SSD but still bring able to access them from the two accounts that are set on my Mac. Just like for an internal drive. I have tried all I could but it does not want to work. How do I do that ? Thanks.

If you were running this software, the Mac's Bonjour would automatically "discover" The Linux machine.
http://en.wikipedia.org/wiki/Avahi_(software)

Encrypt/decrypt same file with two different passwords

Hi everyone:
I'm quite new to Java and cryptography in general and have a theoretical question. Is the following scenario possible and how would it be implemented:
Two users with two passwords (say, a regular user and a superuser) encrypt, decrypt, read from and write to the same file. The secret key for encryption and decryption should be based on their passwords (generated from their passwords), i.e. not stored anywhere on the system.
I've been racking my brains but can't think of a way. Am I missing an obvious solution?
Can it be done?
Thanks,
Michael

I don't think you can avoid having more than just a password hash stored on the system. Using a combination of my approach and Jeff's approach I can implement this as long as you allow a password protected key store to be stored on each system. A given user's key store would contain his RSA private key and associated public key together with the admin user's RSA certificate (thought the admin user's public key could be stored in the program since it does not have to be kept private). The admin user's key store would contain only his RSA private and public keys.
Assume that the data file is to be create by a standard non-admin user. His code performs the following actions -
1) Generates a random symmetric algorithm key. Say a 128 bit AES key.
2) He write a digest of this to the output file.
3) He writes the random key encrypted with his public key to the file.
4) He writes his public key (or certificate) to the file.
5) He writes the random key encrypted with the admin users public key to the file.
6) He encrypts the data using the random key writes the result to the file.
This user can then update the file by
1) reading from the file the digest of the random key.
2) reading the random key encrypted with his public key.
3) Decrypting this encrypted random key using his private key extracted from his keystore.
4) Check the digest of this key to make sure he has the correct random key.
5) skipping his certificate and the random key encrypted using the admin user's public key.
5) Decrypting the data using the random key.
6) Update the data.
7) Re-encrypt the file as described in the first part using a new random key.
The admin user can
1) read from the file the digest of the random key.
2) skip the random key encrypted using the user's public key.
3) reading the user's public key from the file (for use later if the file needs to be updated).
4) read the random key encrypted using the admin's public key.
5) decrypting the random key using the admin's private key obtained from his key store.
6) check the digest of the random key to make sure it is correct.
7) decrypt the the data.
The admin can edit the data since he can re-encrypt the data in a similar manner to the way it was created in the first place.

Time Machine doesn't like external drives with multiple partitions

I've had a problem with Time Machine on both 10.5.0 & 10.5.1 - Time Machine could not create the initial backup regardless of all the things I tried.
I have a Powerbook with a 300Gb Maxtor connected via firewire 800. This drive had been partitioned into three partitions (which I've used with other backup tools without problem).
Apparently the problem I had been having with Time Machine was that there were three separate partitions on the external drive. As soon as I took a chance and wiped all of those partitions and made a single partition, everything was fine.
I had called Apple Tech Support shortly after I got Leopard and when I discovered the problem with Time Machine. I specifically asked if there would be a problem from the multiple partitions and they didn't think there would be, but they were sure. Looks like Apple was wrong.
If you are having problems with Time Machine with a drive that has multiple partitions, trying changing your external into a single partition drive.

You will note that I was referring to a Powerbook and the Apple Partition Scheme. There might be something different happening for Intel/GUID users.
10.5.1 did address other issues with other partition types. Time Machine seems to have trouble with certain partition schemes. I'm not surprised that multiple partitions and GUID works because of things like bootcamp. Apple probably tested specifically for that type of config. They may not have worked all the bugs out of multiple partitions on a Apple Partition Scheme.

External drive with two computers?

Before long, I'll have to get an external firewire hard drive for my iMac. I think it's going to be a Maxtor 1 Touch III 1tb Firewire 400. My question today is...if I get a laptop at some point, MacBook or MacBook Pro, will I be able to use the external drive with that as well?

Yes mate you can use it on any computer you want as long as it has a firewire 400 connection.

Encrypting an external disk with two partitions

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