Boot Camp Assistant crashes when partitioning drive (exception: EXC_BAD_ACCESS)

I run Mountain Lion, a fresh install, brand new Macbook Pro. HD: Samsung 840 Pro 512 GB SSD.
When trying to go through Boot Camp Assistant / Setup it works fine until it wants to repartition my drive. It then quits unexpectedly and returns these errors:
Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x000000000000003c
Everything else on this new machine works like a charm. I checked permissions, verified the disk - no issues whatsoever.
Can anyone help me out with this?

I had the same problem, so I decided the system had too much going on. I stopped Time Machine and unmounted the disc, then I closed every other running program except Boot Camp, disconnected all unnecessary devices, selected the partition size and then didn't touch a thing, just went and made a cup of coffee. When I came back it had started and eventually partitioned fine.

Similar Messages

Boot Camp Assistant: Can't Partition Drive

I've been trying to partition my hard drive using the Boot Camp Assistant so I can install Windows XP. However, whenever I try to partition the drive, I get an error message saying that my hard drive needs to be a single Mac OS Extended (Journaled) volume. I opened up Disk Utility to see what was wrong, and it said that my only hard drive, Macintosh HD, was formatted as a Mac OS Extended (Journaled) volume. I tried bumping the partition size down from 15 gigs to 12 gigs; the progress bar was a little under 25% full when I got the error message again. I'm planning on arranging to get support at an Apple Store, but I wanted to see if anybody on here knew what to do first. Any ideas?

JadeH wrote:
okay so i did what you said and i selected restart under superduper clone so i could test to make sure the clone worked...but now i can't get it to restart under my Macintosh HD. the clone works fine but it is on my external hard drive. i need y internal hard drive to be my start up disk so i can use boot camp assistant. i went to system preferences->startup disk but it only shows my clone on my external hard drive. any suggestions?
When you tested the clone, did you change the default boot to the clone? You should have simply booted by holding down the Option key.
I don't know what happened to your HD or original OS, but if you reboot and hold down the option key, your original OS should show up in the selection menu.
If not, boot into the Leopard DVD (press "C" key during boot) and after the language screen, in the menu, top left under Utilities select disk utility and run it, repairing HD and permissions. Then see if you can reboot into the original OS. You may have to hold down Option key again until you boot it and change the default back to the original OS.

Boot Camp Assistant won't partition drive

I have a new Mac Pro with a clean install of 10.5. No previous Boot Camp installation, nor has Parallels been installed. I have two 500gb drives and two 250gb drives installed. I want to partition one of the 250gb drives to install Boot Camp and XP. I've tried to use the Boot Camp Assistant but it won't partition the drive. It seems to start the process, but never gets off the progress bar and eventually I have to Force Quit and reboot. The drive I'm trying to partition is freshly erased with Apple's Disc Utility (formatted with Mac OS Extended (Journaled)).
Am I doing anything wrong? I successfully installed Boot Camp on my MacBook Pro using Boot Camp Assistant, but nothing I've tried with my Mac pro seems to work.

Check that it has GUID partition table.
Disk Utility Partitions -> Options
Click on drive (not partition) in First Aid and look at the bottom of the screen.
50/50 partitions?
You could just use Disk Utility, make one FAT, then format it again if needed in XP. That lets you use the first partition outer tracks).
If you choose MRB, BCA will only use the entire drive. I wanted half NTFS and half FAT so I did it on my own.

Boot Camp Assist can't partition hard drive

Boot Camp won't partition my 500GB internal HD. I get the message:
"The startup disk cannot be partitioned or restored to a single partition. Back up the disk and use Disk Utility to format it as a single Mac OS Extended (Journaled) volume. Restore your information to the disk and try using Boot Camp Assistant again." I had recently used SuperDuper to replace my original single partition internal HD with the new 500GB HD with three partitions. I had not setup Boot Camp on the original HD. After getting the Boot Camp Assist error message on the new HD I used SuperDuper to clone back from my original HD (which was now external) with a single Mac OS Extended (Journaled) volume. I then ran Boot Camp Assist again and got the same message. I ran Disk Utility Verify Disk Permissions and got some errors which I then successfully repaired. I still get the same Boot Camp partition error. Any suggestions?

When you partition your drive you are given the option to format it for OS 9, if you choose this option your drive will be formatted to be incompatible with Boot Camp. This incompatiblity will remain when you put it back to a single partition unless you go to options and select the top radio button (format for Intel Mac) to create a GUID Partition Table (at least that's what I did and it fixed the problem).

I'm trying to install Windows XP on my Leopard 10.5.8 using Boot Camp Assistant but when it restarts it says I should insert a bootable disk even though I didn't remove the installer from the drive. What should I do?

More info: I'm using an external CD drive because the built-in one doesn't work for some reason.
Also I went back and deleted the partition (also using Boot Camp Assistant) and just gave up on installing XP, but now every time I turn on my macbook I have to press the Option key to mount the Mac HD. If I don't, it returns to the black screen that says I have to insert the bootable disk and press any key. How do I stop this problem? I've already verified the disk and permissions, plus repaired it. It's still the same.

Go into your system preferences and click the startup disk icon then select your Mac HD.

Boot Camp Assistant couldn't partition the drive

Hi everyone,
I recently deleted my windows partition, and wanted to create a new one, however, boot camp assistant told me that I couldn't (I do not know the exact wording). Boot camp assistant said to save my mac drive as an image, reformat my hard drive, and restore the image using disk utility.
SO, I tried to, but something went wrong, because the disc image I have will not mount....
In disk utility, I created an image of Macintosh HD, but I'm thinking I should have created an image of my hard drive "320.07 GB WDC3200..."
Can anyone confirm this?
Also, if anyone knows how I can view the files in my dmg that I created, that would be great.
The message I get with disk utility is: Unable to attach "Macintosh HD.dmg" (No mountable file systems)
So I click okay, and verify the disk, and I get ALOT of incorrect block counts (should be 1001 instead of 1020220) for example..
After checking multi-linked files and such, disk utility tells me to "repair disk" But I cannot mount the image, therefore I cannot repair it. I tried to repaid the DMG itself, but nothing happens.
Any info would be awesome.

converted corrupt DMG to CDR with disk utility. Some data loss occurred, but I got the majority of my files back.

Boot Camp Assistant hangs at partitioning process?

Hello,
I'm trying to install Windows on my Mac Pro. But when I run the Boot Camp assistant and assign the Windows partition, the Boot Camp Assistant hangs at the process of partitioning. The progress bar just keeps on moving, but it wont finish the partitioning.
Screencap link: www.laspalmas.nu/hang.jpg
Sorry, the OS language is in finnish but "Osioidaan levyä..." = "Disk partitioning..."
Does anyone have advice, why does this endless hang happen at this point?
Thanks for the replies,
Lauri

BACKUP before you start.
Repair your drive.
Would help to know how much of the free space is actually in a large enough unfragmented single chunk.
You may need to backup / initialize / restore.

Boot Camp Is Unable to Partition My Drive

Hello,
The first time around I managed to set up Boot Camp and Windows 7 Home Basic very successfully and effortlessly on my MBP mid-2012.
Then I found out I could not get activation key for it because Microsoft no longer sold the Basic version. I downloaded the Windows 7 Home Premium version and bought an activation key from Microsoft and am now trying to get it on my computer.
Using Boot Camp Assistant I was able to delete the partition on which old Windows resided. Then using Boot Camp Assistant I built a USB drive that included the new ISO for the Windows 7 Home Premium edition and then the process went well and all necessary support files were downloaded.
We got to the point where I selected the size of the partition and Boot Camp Assistant tried to partition it except that it is not able to. It doesn't giver any reason, it just says: "Your disc could not be partitioned. An error occurred while partitioning the disk."
Anyone here knows what could be the cause of the problem and possibly how I can resolve it?
By the way, I have checked and the base format of the drive is Mac OS Extended (Journaled), and the disk has only one partition.
Thanks much.
Farzad

I am doing a TM backup now. I looked at the iDefrag and the drive definitely needs defragmenting, according to the software, but I thought with Macs we don't need to worry about those things. I want to do one other thing I read somewhere else as a remedy for this inability to partition the drive before taking the leap and doing the full erase and reinstall.
Here is the link on the internet: http://crounji.wordpress.com/2014/01/28/a-solution-to-your-disk-could-not-be-par titioned-error-on-boot-camp-assistant/.
And I believe another forum has discussed this topic.
Here is another approach I want to try: Boot Camp: Partition alert message when using Boot Camp Assistant
Farzad

Boot Camp Assistant 5.1.2 & 10.9.3 Broken?

Boot Camp Now Hangs Every Time & Every Which Way
My Fall 2013 installation of Windows 8 was a breeze! I’ve been running Windows 8.1 until a week ago when my internal “Windows” drive was no longer visible as a boot drive. I option-key boot into one of three internal drives:
SSD / 10.9.3
1TB HD / 10.6.8
1TB HD / Windows
Convincing myself that I must have missed something, I’ve studied and re-studied the Boot Camp Installation & Setup Guide and have read and tried the procedures described in numerous discussions and youtube videos.
Expect that this seems radical but thought it smart maintenance to back up all Windows HD data and reformat the Windows HD. I pulled my SSD (no mess with), booted into Recovery-10.9.3 and installed a clean 10.9.3.
>Put Windows installation DVD in CD drive >Shut down >reboot w/ Option+Command+p+r (reset PRAM) >Reboot 10.9.3
Mac Pro is now configured simply as:
1TB HD / 10.9.3
Windows DVD
32GB Flash
My failed installs with Boot Camp Assistant (5.1.2):
1.
Boot Camp Assistant adds a partition to 10.9.3, downloads and installs Windows support software >system auto reboots >black screen >chimes >grey screen >Windows CD spins up> then spins down >I wait for an hour+ but nothing seems to be going on and grey screen remains. (I never get to the Windows setup phase.)
reboot >launch Disk Utility >remove partition added for Boot Camp >shut down and reboot
2.
Boot Camp Assistant adds a partition to 10.9.3, downloads and installs Windows support software >system auto reboots >I option-key and 10.9.3, Recovery-10.9.3, Windows (CD), and Boot EFI (CD) options are presented >I select Windows but it immediately hangs. (Can’t boot to the Windows Installation DVD.)
reboot >launch Disk Utility >remove partition added for Boot Camp >shut down and reboot
3.
Boot Camp Assistant adds a partition to 10.9.3, downloads and installs Windows support software >system auto reboots >I option-key and 10.9.3, Recovery-10.9.3, Windows (CD), and Boot EFI (CD) options are presented >I select Boot EFI > Windows setup begins >I enter my Windows 8 key >Windows can’t find a drive for installation (even, from within Advanced option, formatting the disk during Windows setup process).
reboot >launch Disk Utility >remove partition added for Boot Camp >shut down and reboot
4.
Purchase AnyToISO for $23 to extract the ISO from my Windows 8 DVD. Easily done.
Edited the info.plist file for Boot Camp Assistant (youtube video VBAQ3CNgfxc) so that “Create a Windows 7 or later version install disk” would list as an option under Boot Camp Assistant’s "Select Tasks" window. Checked all three options. >Selected the fresh ISO file with the installation destination being my 32GB flash drive. Boot Camp downloads and installs latest Windows support software from Apple. >system reboots >black screen >chimes >grey screen >Windows CD spins up> then spins down > I wait for an hour+ but nothing seems to be going on and grey screen remains. (I never get to the Windows setup phase.)
Checking the content of the 32GB flash (now named “WININSTALL”) it contains:
          $WinPEDriver$ (folder)
          autorun.inf
          AutoUnattend.xml
          boot (folder)
          BootCamp (folder)
          Bootmgr
          bootmgr.efi
          efi (folder)
          the .iso file
          setup.exe
          sources (folder)
          support (folder)
>shut down
I option-key reboot >10.9.3, Recovery-10.9.3, EFI Boot (flash drive), Windows (CD), and EFI Boot (CD) options are presented >I select the flash drive Boot EFI >Windows setup begins >I enter my Windows 8 key >Windows can’t find a drive for installation.
The only significant hardware/software differences (between now and my initial installation of Windows) is the progression of OS updates to the current (10.9.3) and the current version of Boot Camp Assistant (5.1.2).
Other recent procedures:
-verified my HD
-repaired permissions
-reset PRAM
For most install attempts I let Boot Camp Assistant build the partition. However, I’ve also tried adding a second partition manually w/ Disk Utility to make room for Boot Camp and Windows support software.
Do I need to regress to 10.8? IF that’s what was on my Mac Pro when received Fall 2013, it worked just fine!
What a nightmare!
I’m going crazy here!
What am I missing?
Any suggestions appreciated!

I've ordered Mountain Lion 10.8 from Apple Store. (Possible that my Mac Pro was not running Mavericks when received.)
Today I downloaded the trial of ntfsmac. It adds "Windows NT Filesystem" and "Windows NT Filesystem (compressed)" to Disk Utilitie's format options. I formatted a 1TB internal HD with "Windows NT Filesystem."
Shut down Mac Pro >pulled all drives and placed the 1TB internal HD in bay 1 (Windows install DVD is in disc drive). Reboot to Windows and proceed through first pages of setup but dead end as with previous installations:
Where do you want to install Windows?
Windows can't be installed on Drive 0 partition 1
Windows can't be installed on Drive 0 partition 2
I select "Drive Options (advanced)" and format partition 2.
outcome: "Windows can't be installed on Drive 0 partition 2"

How to install boot camp on a pre-partitioned HD ?

Hi,
I have just done a clean install of my mac. Before installation i used disk utility to create a few partitions, one of them made available for Boot Camp.
Now when i start the Boot Camp Assistant it tells me:
"The startup disk can not be partitioned or restored to a single partition.
The startup disk must be formatted as a single mac os extended (journaled) volume or already partitioned by Boot Camp Assistant for installing windows"
What the h.... do i really have to start over AGAIN?!
I need 3 mac partitions and 1 windows, if i re-install, then use boot camp assistant to create a windows partition i'll be left with just 2 partitions.....
Any help is very welcome at this point.
Jay

You don't need to run Boot Camp Assistant since you've already partitioned the drive. Just boot to your Windows disc and follow the installer set up. All Boot Camp Assistant does is partition the drive for you.
However, I'm pretty certain with that many partitions, depending on the order in which you've placed them, you will run into some errors trying to install Windows on the Windows partition you've created. I believe the Windows installer doesn't like to install on anything higher than partition 4. If your Windows partition is #3, and your Mac OS partition is #2, you may still encounter an error, but this has a far easier workaround than having the Windows partition be higher than partition #4.
Let me know how you've set it up.

Boot Camp Assistant Can't Move Files? Image won't save ('resource busy')

I've been trying to set up boot camp and every time I go to partition the drive I get this message:
Back up the disk and use Disk Utility to format it as a single Mac OS Extended (Journaled) volume. Restore your information to the disk and try using Boot Camp Assistant again.Back up the disk and use Disk Utility to format it as a single Mac OS Extended (Journaled) volume. Restore your information to the disk and try using Boot Camp Assistant again.
My drive is already set up as an OS Extended (Journaled) volume. I went to try to save a disk image and it won't save b/c it always says resource is busy. Well obviously I need to use the computer to back up it's own hard drive so of course it's busy.
Any help is greatly appreciated. Thanks.

Are you sure you had enough free space on the drive for the Windows partition you tried to create? Have you tried repairing the drive?
Repairing the Hard Drive and Permissions
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 Installer menu (Utilities menu for Tiger and Leopard.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger, and 4.1 for Leopard) and/or TechTool Pro (4.6.1 for Leopard) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.

Can I install Windows on my Mac without Boot Camp Assistant?

I was wondering if this was possible, or does Boot Camp Assistant format the hard drive in such a way that makes it possible for Windows to be installed, or can I just create a new partition myself and format it and install Windows without having to touch Boot Camp Assistant?

Windows on Intel Macs
There are presently several alternatives for running Windows on Intel Macs.
1. Install the Apple Boot Camp software. Purchase Windows XP w/Service Pak2, Vista, or Windows 7. Follow instructions in the Boot Camp documentation on installation of Boot Camp, creating Driver CD, and installing Windows. Boot Camp enables you to boot the computer into OS X or Windows.
2. Parallels Desktop for Mac and Windows XP, Vista Business, Vista Ultimate, or Windows 7. Parallels is software virtualization that enables running Windows concurrently with OS X.
3. VM Fusionand Windows XP, Vista Business, Vista Ultimate, or Windows 7. VM Fusion is software virtualization that enables running Windows concurrently with OS X.
4. CrossOver which enables running many Windows applications without having to install Windows. The Windows applications can run concurrently with OS X.
5. VirtualBox is a new Open Source freeware virtual machine such as VM Fusion and Parallels that was developed by Solaris. It is not as fully developed for the Mac as Parallels and VM Fusion.
Note that Parallels and VM Fusion can also run other operating systems such as Linux, Unix, OS/2, Solaris, etc. There are performance differences between dual-boot systems and virtualization. The latter tend to be a little slower (not much) and do not provide the video performance of the dual-boot system. See MacTech.com's Virtualization Benchmarking for comparisons of Boot Camp, Parallels, and VM Fusion. Boot Camp is only available with Leopard or Snow Leopard. Except for Crossover and a couple of similar alternatives like DarWine you must have a valid installer disc for Windows.
You must also have an internal optical drive for installing Windows. Windows cannot be installed from an external optical drive.

Boot Camp Assistant quits unexpectedly :/

please help me, Boot camp assistant crashes immediately when I open it(on Mavericks) :/
I changed its permissions(/applications/utilities/boot camp assistant/contents), I wanted to edit the info.plist file to enable "PreUSBSupportedModels" and other things on the older macbookpro(6,2)
this is what I get after crash...
Process:         Boot Camp Assistant [271]
Path:            /Applications/Utilities/Boot Camp Assistant.app/Contents/MacOS/Boot Camp Assistant
Identifier:      com.apple.bootcampassistant
Version:         ???
Build Info:      BootCampAssistant-5317000000000000~145
Code Type:       X86-64 (Native)
Parent Process: launchd [137]
Responsible:     Boot Camp Assistant [271]
User ID:         501
Date/Time:       2013-10-31 11:26:45.905 +0530
OS Version:      Mac OS X 10.9 (13A603)
Report Version: 11
Anonymous UUID: 19C7DB24-A97C-BF05-8765-8DB94EC79A5C
Crashed Thread: 0
Exception Type: EXC_CRASH (Code Signature Invalid)
Exception Codes: 0x0000000000000000, 0x0000000000000000
VM Regions Near 0x7fff718820a8 (cr2):
    __LINKEDIT             00007fff6321d000-00007fff63231000 [   80K] r--/rwx SM=COW /usr/lib/dyld
--> Submap                 00007fff70000000-00007fff80000000 [256.0M] r--/rwx SM=PRV process-only VM submap
    unused shlib __DATA    00007fff7167c000-00007fff73e84000 [ 40.0M] rw-/rw- SM=COW system shared lib __DATA not used by this process
Thread 0 Crashed:
0   dyld                              0x00007fff631ab028 _dyld_start + 0
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x000000000000000d rbx: 0x0000000000000000 rcx: 0x0000000000000000 rdx: 0x0000000000000000
rdi: 0x0000000000000000 rsi: 0x0000000000000000 rbp: 0x0000000000000000 rsp: 0x00007fff5227cd08
   r8: 0x0000000000000000   r9: 0x0000000000000000 r10: 0x0000000000000000 r11: 0x0000000000000000
r12: 0x0000000000000000 r13: 0x0000000000000000 r14: 0x0000000000000000 r15: 0x0000000000000000
rip: 0x00007fff631ab028 rfl: 0x0000000000000201 cr2: 0x00007fff718820a8
Logical CPU:     0
Error Code:      0x020000f4
Trap Number:     133
Binary Images:
    0x7fff631aa000 -     0x7fff631dd817 dyld (???) <D1DFCF3F-0B0C-332A-BCC0-87A851B570FF> /usr/lib/dyld
External Modification Summary:
Calls made by other processes targeting this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
Calls made by all processes on this machine:
    task_for_pid: 286
    thread_create: 0
    thread_set_state: 0
VM Region Summary:
ReadOnly portion of Libraries: Total=288K resident=268K(93%) swapped_out_or_unallocated=20K(7%)
Writable regions: Total=8444K written=0K(0%) resident=12K(0%) swapped_out=0K(0%) unallocated=8432K(100%)
REGION TYPE                      VIRTUAL
===========                      =======
STACK GUARD                        56.0M
Stack                              8192K
VM_ALLOCATE                           8K
VM_ALLOCATE (reserved)                4K        reserved VM address space (unallocated)
__DATA                              252K
__LINKEDIT                           80K
__TEXT                              208K
mapped file                         216K
shared memory                         4K
===========                      =======
TOTAL                              64.8M
TOTAL, minus reserved VM space     64.8M
Model: MacBookPro6,2, BootROM MBP61.0057.B05, 2 processors, Intel Core i5, 2.4 GHz, 4 GB, SMC 1.58f15
Graphics: Intel HD Graphics, Intel HD Graphics, Built-In, 288 MB
Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 256 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x802C, 0x31364A53463235363634485A2D3147314631
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x802C, 0x31364A53463235363634485A2D3147314631
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (5.106.98.100.22)
Bluetooth: Version 4.2.0f6 12982, 3 services, 23 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: ST9320325ASG, 320.07 GB
Serial ATA Device: MATSHITADVD-R   UJ-898
USB Device: Hub
USB Device: Apple Internal Keyboard / Trackpad
USB Device: Internal Memory Card Reader
USB Device: BRCM2070 Hub
USB Device: Bluetooth USB Host Controller
USB Device: Hub
USB Device: Built-in iSight
USB Device: IR Receiver
Thunderbolt Bus:

Hey,
Could you please upload the original info.plist.
I modified without taking backup and now I am not able to use BootCamp Assistant.
Thanks.

Difficulties in following Boot Camp assistant instructions

Hi,
I am following the Boot camp guide instructions to open up Boot Camp assistant to do partitioning for installing of Windows 7 OS.
Upon clicking the Boot camp assistant icon, after software update, from Utilities folder, there are 2 options given to me: (a) download the windows support software for this Mac. (b) I have already downloaded the windows support software. I click the download option, (a) and hit 'continue' icon. A message box popped up with the message: The startup disk cannot be partitoned or restored to a single partition." and with the only possible icon to click "ok", which brought me back to the earlier window with the 2 options, (a) and (b). Clicking on (b), brought me to the same earlier message. The whole process is a closed loop and I can't move on, either clicking (a) or (b), which are the only 2 options to click.
See screenshots:
Pls advise how can I move on from here in using the boot camp assistant to partition? Or is there any other way to partition and move on to the real task of installing Windows OS 7?

Open disk utility, how many partitons are on your HD? Boot camp can only run if your HD is in 1 partition.
If you only see 1 partition, repair permissions for that HD and try boot camp assistant again.

Is it possible to bypass the number of partitions limitation (no more than 2) when trying to boot into windows by not using boot camp assistant, and instead just partitioning the drive manually?

I can't find a specific answer to this question.
I did have a functioning Windows 8 installation on my MacBook Pro previously. I tried to make a third exFAT partition so as to have a drive mutually readable/writable to both operating systems. This made it so I could no longer boot into my Windows installation.
I know I'll need the boot camp drivers installed on the Windows installation after the fact, but would manually creating a partition and installing the OS without Boot Camp Assistant work? And would I be able to boot from it while having a total of 3 partitions?

That's the spirit!
Just be sure to have your OS X junk safe in a tested backup, in case the whole thing craps out and you end up having to do a low-level partition and erase of the entire drive.
And like I said, the problem is not OS X. I've set up mine at least once with 4 partitions holding as many flavors of OS X as can run on the hardware, all perfectly bootable on demand.

Boot Camp Assistant crashes when partitioning drive (exception: EXC_BAD_ACCESS)

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