Force boot from external FW drive at startup?

Hi Folks,
Last evening I had big problems. My PBTi DVI was not booting past the gray screen with progress pinwheel: it would just stop and then shut down. I turned on verbose logging, and it turned out the internal HD was seriously corrupt ("invalid key for thread record"; ouch!). I could not boot from the OSX CD because (I assume) I replaced my dead Apple SuperDrive with a third party CD/DVD burner, which requires loading a profile.
Anywho, I have two external bootable firewire drives, but I couldn't figure out how to force my PB to boot off either one, it always tried to access the internal drive first then failed. Is there a key combination for this or an Open Firmware command?? Just in case it happens again.
(I finally fixed the problem by using my neighbor's PB, mounting my PB in firewire mode, then repairing its HD with DiskWarrior.)

Dmyhd,
Thanks for the response. I found the answer myself on the MacWorld site about 5 minutes after I posted it here (a "doh!" moment to be sure). I swear, desperate as I was, I could not find it anywhere last night.
Thanks again,
Clifford

Similar Messages

Stupid question: force booting from external FireWire drive

My PowerBook is refusing to boot from it's hard drive (flashing ?/folder), which I'll be attempting to repair using DiskWarrior, etc.
But it's also not finding and booting from the OS X installed on my external FireWire drive (which it could do under normal circumstances). How do I force it to do that given that I'm unable to set the Start Up Volume in the normal manner?
PowerBook G4 17" 1.5GHz 512MB 80GB Mac OS X (10.3.6)

Dale,
Thanks for your response. I've been through the usual stuff as in your reference and I eventually got it to boot off the external HD by just leaving it long enough - it took maybe 10-15 minutes. I'm booted from it now. I hadn't thought of using the Startup Manager, but will try to remember next time.
As for the internal HD, it's looking like it's dead - neither Disk Warrior nor Data Rescue II seem to be able to see it. I tried Disk Utility from the external HD, but it doesn't see it and nor does the Profiler. Maybe it's just a loose connection internally. There is a noise coming from the PB from about just under the division between the left hand rest and the speaker. It sort of sounds like a disk continually being read or written - ie. a sort of very rapid clicking, but I don't think it's the HD. And I don't think it's the fan. Anyone with any ideas before I call AppleCare?
I did have a very similar problem a few weeks ago (http://discussions.apple.com/message.jspa?messageID=1465680#1465680), but Disk Warrior fixed it apparently with next to no problems. I was going to wipe the drive at the weekend & reinstall, but didn't get round to it in the end ... Fortunately I had a backup this time and was able to restore my user simply by copying it.

Ibook g3 M2453 boot from external DVD drive

Hi, I'm Simon from Germany.
I have an iBook M2453 Mac OS X and a lot of dvds.
But the iBook has no DVD drive. So I bought an external DVD drive. But no matter what I do during boot (press the C key or alt)
I can not boot from external DVD drive.
Please help me
Thank you.
Simon.
PS: I have translated the text using Google translate

Hi Simon,
the iBook is able to boot from USB, but this is not expected behaviour and not supported by Apple.
http://support.apple.com/kb/TA20554
There are some external enclosures that do the trick.
But only when you press ALT after Power on. (Select a startup volume via the Startup Manager)
External enclosures with Prolific PL-3507 chipset (Firewire/USB Combo)
You will find them on Ebay Germany
I have a Delock IDE>USB 2.0 enclosure for 2,5" HDs
http://www.delock.com/produkte/gruppen/Geh%C3%A4use/Delock_25_external_enclosure _USB20_42365.html?setLanguage=EN
that works also.
Hallo Simon,
das läuft nur mit einigen wenigen externen Gehäusen. Such auf Ebay nach "PL-3507"
und nimm eins mit Firewire und USB Anschlüssen.
Ein Festplattengehäuse von Delock für 2,5" Festplatten ging auch ( Link oben)
Ein Boot ist nur möglich wenn du die ALT Taste nach dem Einschalten drückst und dann über den Startup manager dein Boot volume auswählst.

Boot from external Firewire Drive-cannot repair or optimize internal drive.

Hi all
Connected my new 300 GB Seagate External Firewire Hard Drive today.
Installed Tiger from DVD. Updated to 10.4.3.
Installed Tech Tool Pro 4. Updated to 4.1.1.
Booted from External Firewire Drive.
Disk Utility cannot Verify or Repair internal drive. Does not say or do anything.
Tech Tool Pro cannot repair volume or optimize. Says, "Cannot Unmount Volume."
Is there a fix for this?
Thank you for the help!
Jeff
eMac 800 nVidia. Mac OS X (10.4.3) 160 GB Internal HD. Pioneer Superdrive. 1 GB RAM.

Hi
I did name the new external completely different from the internal.
After booting from the external Firewire Hard Drive, I tried running Disk Utility and Tech Tool Pro from both drives. No matter which drive I run the Utilities from the same things happen every time...
Nothing happens when trying to use Disk Utility to Verify Volume on internal eMac Drive.
Tech Tool Pro says, "Cannot unmount volume" when trying to check Volume or Optimize internal drive.

Booting from external hard drive on intel-based MacBook Pro

Good day everyone. I know similar questions were raised in this community, but I still have some questions.
I have MacBook Pro(late 2011) with OS X 10.7.5 and external hard drive with Ubuntu 13.04, from wich i can boot succefully on my PC. But MacBook Pro will not boot from my external drive, no matter which key/combination i use during restart.
After googling I found some answers to my initial question, how to boot from external hard drive
https://discussions.apple.com/thread/1852633?start=0&tstart=0
http://www.everymac.com/systems/apple/macbook_pro/faq/macbook-pro-boot-from-exte rnal-firewire-or-usb-drive.html
http://support.apple.com/kb/ht1948
As I understand I need to format my external hard drive into GUID partition type and this will be enough to be able to boot from it on my mac?
With this new partition type, will I be able to install ubuntu again on my external drive?
Does GUID partition type supports NTFS, ext4 and FAT32, linux swap?(I use ntfs for big files, ext4 as partition for ubuntu and fat32, because i use windows, linux and osx)
Will I be able to boot from my pc from my external drive with this new partition type?
What are downsides, if any, to GPT?
here is info on my e-drive

LowLuster wrote:
The only OS that will boot from an external drive is Mac OS X or maybe Linux. For OS X to be installed on any drive it need to be formatted Mac OS Extended and have GUID partition table.
As for Linux I'm not that familiar with it but again for a Mac to boot it need an EFI partition on the drive and I don't think that is possible with NTFS or FAT32 let alone the native Linux format.
Went to wiki to learn more on efi but found artice on uefi.
Operating system loaders are a class of the UEFI applications. As such, they are stored as files on a file system that can be accessed by the firmware, called EFI System partition (ESP). Supported file systems include FAT32, FAT16 and FAT12, and supported partition table scheme is GPT only. UEFI does not rely on a boot sector, although ESP provides space for it as part of the backwards compatibility.[26]
Here is FAQ on official uefi website.
Can UEFI Secure Boot be adopted and implemented by a variety of operating systems?
UEFI specifications are platform-independent, supporting multiple platforms and architectures. In addition, UEFI specifications are designed to promote cross-functionality, as well as to support broad adoption across multiple operating systems, including Windows as well as Linux-based operating systems. The specifications are robust and can potentially complement—or even advance—other distributions, such as Linux-based distributions.
And here is wiki article on GPT expaining OS support.
It is obvious both uefi and GPT are ok with Linux and file systems such as FAT32, ext4 and NTFS.
I guess there is no much difference(or is that the same thing?) between uefi and efi used in Macs.
In your answer to Stark Industries you said that mac can boot linux from external hard drive, well this is not the info i got of official website and it is still my question, because your answer is very inconclusive and your info is partially incorrect

Why won't my iMac 27" boot from external hard drive?

I have a new 27in Intel i5 dual core 3.6GHz iMac. It works wonderfully.
My question is this. I have a Pleides Ice Cube external hard drive with a USB 2.0/Firewire enclosure with a 500GB hard drive. I used diskutility to format the hard drive as a GUID Partition Table. I then used SuperDuper to clone the iMac OS 10.6.7 and Apps over to it.
I can select the external drive in System Preferences/Startup Disk to boot from, but when booting the iMac gets as far as the white screen then just stops loading.
I have tried both the USB connection and the Firewire connection (with a Firewire 800 to 400 cable).
I have run Disk Utility and repaired the disk and the preferences.
I have used Disk Warrior to rebuild the directory as well, but the iMac will not boot from the drive.
It does boot from the original DVD's and its own hard drive.
My old 24" iMac had no trouble booting from this hard drive or any of the others I have collected over the years, so I am reluctant to think it is the external drive. It is something to do with this particular processor Snow Leopard and external drives.

It sounds like something in the SuperDuper clone might not have copied well. To get the full answer on that I would check with Apple or SuperDuper to see if they support each other.
As a quick test, if you restart and immediately press and hold "option" on your keyboard do you see your external HD as an option to boot from? If so, click it and see if the boot runs any differently, but if you don't see it at all that could show that the problem is more deep rooted.
Personally, if looking in to either of those didn't give me any other info to go on, I would reformat and start the clone again. BTW, do you know for sure GUID Partition is the format you'd want to do this on? Generally macs use "Mac OS Extended" and some external HDs can use "FAT32" (if you want them to work well with Windows)
Hope that gives a little direction
Alex

Booting from external USB drive

I was wondering if there is any way to boot from a USB drive that I have? I partitioned the drive, erased it, and its basically ready to go. But I can't install Mac OS X on it because it says that I cannot reboot from the drive.
I know that iBook G4s generally can't boot from a USB devise but is there any way to get around this?

If you're computer is having kernel panics there's a conflict; either software or hardware. 2GB of free space isn't enough but I haven't seen anything that suggests KPs are caused by too little free space. Your computer should start fine with 2GB free. It may have problems after a period of use but it would startup and run.
Try starting in Safe Mode. If successful move some of your files to the external drive and then restart normally. If it KPs again, restart in safe mode and disable all startup items in System Preferences>Accounts>youraccount and restart. If it KPs again go through the linked troubleshooting steps by Dr. Smoke step by step. That's the only way to resole your problem.

Hard drive dead/Boot from external hard drive?

My hard drive failed and I need a new one. For the time being, I'd prefer not to open up my iMac and replace the internal hard drive. I have an external USB hard drive and I cannot install OSX onto this drive (strangely, it takes the first disc but not the second).
Is it possible to boot and run an iMac G5 from an external hard drive? If so, what is required for hardware and what steps need to be taken?
If not, what course of action would you recommend?

It is very easy to boot an iMac from an external drive, but the drive should be a Firewire drive. Get one, then get SuperDuper!, which will enable you to clone your data and system to it. You can then choose the external firewire as your boot drive and operate without any problems.
Apparently, there are ways to boot from a USB drive, but they are complicated and a firewire drive is very straightforward and fast.
Let us know how you make out,

All users GONE except for "Other"...and CANNOT boot from External DVD drive

I booted the iMac (Intel...the last one with the White Bezel) tonight, and all of my users were GONE except for "Other." The internal Superdrive has had a disc jammed in it for months, so instead I have an OWC external USB/FW400/FW800 DVD drive. Snow Leaopard.
I need to boot from the SL install disc, but that must go into the external drive...which, as it's been since I upgraded to SL, the Mac sometimes sees and sometimes doesn't. Right now it can't see it. Which leaves me a big pile of crap, doesn't it?
So, what to do? I can't boot the internal drive because it's jammed with a DVD (or I spend $300 to replace what should be a $20 optical drive in it), I can't boot the external DVD drive because the iMac w/Snow Lepeord can't see it, and, meanwhile, all of my photos, etc., are on my Time Machine backup drive...which, as long as I can't do any of the above, just sits there...useless.
Can you tell I'm a bit frustrated with this?
I've reset the PRAM. I've rebooted. I've held down all sorts of combinations of keys. I've tried every single interface type on the external drive and the same thing - the drive can't be seen by the computer.
Has the internal hard drive failed? Nope. I'm tying this using the Firefox browser that's running on my Windows XP installation via Boot Camp on the internal hard drive.

Thanks, but no luck so far.
I have an old iMac G3 downstairs, and I connected it to the machine via Firewire. I could see the disk on the 24" iMac, its folders, etc. I wanted to see if I could install OS X via Target Disk Mode from the old machine to the new one, but it's a PowerPC machine and you can't do that. Maybe you can't do that from ANY iMac...I'm not that experienced.
Now the iMac isn't booting at all to Windows via Boot Camp - it's been booting for 45 minutes now with the "WinXP" logo, but nothing. I'm about to throw it in the car and haul it over to my parents, who have both a Powerbook and a 27" iMac. Maybe it'll work there. Who knows.
Other ideas...replace the internal hard drive (cheap)...if that doesn't work, I'll just sell the thing. I'm not going to sink $300 into the thing when I can get a new machine for around $600-$700. I may go to a Windows7 machine on the desktop and a Powerbook...maybe even an iPad.
I really want to love this iMac. It's my first (well, I did have the G3, but that was just to play with) Mac. It's given me a ton of problems since I bought it new. It's always been a "stock" machine - nothing weird done to it. I was hit with an iMovie update once, and that broke iMovie. Even the new iLife 2009 didn't fix it. Then, the internal optical disk drive failed. I couldn't believe that Apple used a proprietary optical drive rather than a stock Pioneer model. Price for the drive alone? $200.
I installed Snow Leopard 2 months ago, and that completely broke my ability to use external optical drives. Sometimes they work...most times they don't. This is an ongoing problem that many people are having (check the forums)...but no fix. Where does that leave me? With a useless computer.
So, I've boiled it down to this: I love the Mac software. I hate the hardware. Sure, it's pretty, but if something goes wrong, get ready to pay. I hate that Apple knows about problems, yet does nothing to address them, like the problem with external optical drives and Snow Leopard.
I bought the Mac because I was sick of Microsoft not being able to simply produce an OS full of security holes. Often times I read people bashing supposed "driver ****" with Windows, but look at what users of Windows machine are demanding of Microsoft - "please make my software compatible with the trillions of combinations of hardware that can run the os...all the way back to stuff that was created in the mid 1990s." Meanwhile, from my experience, Apple can't get their software to work with their own proprietary, supposedly vertically-controlled hardware.
Windows7 is a not bad OS. It's got it's faults, of course. But, if my optical drive failed in a Windows box, I'd have it replaced in 10 minutes...with a bluray drive...that can write...for under $100.
I use my computer for pictures, etc. In fact, we were ready to send off to iPhoto for our yearly photo books. That's not going to happen, as the photos are forever trapped on my Time Machine backup drive (lesson learned: dump photos to a generic format...fat32 works...just in case you decide to switch from Mac to Win7). iLife is great. MS Office is great, too, on the Mac. I love the little things the Mac does right.
After years of screwing around with my Windows box, I wanted a computer that acted like a consumer electronic device. That's not what I've gotten.
Ugh, so now do I buy a Mac Mini for $700, a new iMac for $1,400, or a Macbook Pro and a mac mini?
...or...do I continue to work within this silly Ubuntu Linux world?
Whatever the answer, I wish I didn't have to ask the question now.

Booting from external usb3 drive

Hi, I am trying to boot Linux from an external USB3 drive.
Here are the symptoms.
1. I have uefi boot disabled.
2. I connected a Toshiba USB3 drive to an USB2 port. The device is NOT recognized as a bootable device under Legacy Boot Devices list hence I cannot boot from the USB drive.
3. If I boot from internal HDD, then I can access the USB3 drive without any problems.
4. Plugged in an external USB3 Docking Device to the USB2 socket.
5. Then the USB3 Docking Device is recognized as a Legacy Boot Device and I can boot from the Docking Device.
6. Installed USB3 PCIe card.
7. Connected the USB3 Docking Device to USB3 port.
8. Now I the Docking Device fails to appear as a Legacy Boot Device.
9. Connected the USB3 Docking Device back to the USB2 port and straight away it is now recognized as a Legacy Boot Device.
I would appreciate if any one can give some hints on how to get the USB3 devices recognized as legacy boot devices.
Many thanks.

gdesilva wrote:
Hi, I am trying to boot Linux from an external USB3 drive.
Here are the symptoms.
1. I have uefi boot disabled. (did you mean secure boot?) Did you enable Legacy support?
2. I connected a Toshiba USB3 drive to an USB2 port. The device is NOT recognized as a bootable device under Legacy Boot Devices list hence I cannot boot from the USB drive
3. If I boot from internal HDD, then I can access the USB3 drive without any problems.
4. Plugged in an external USB3 Docking Device to the USB2 socket. This won't help
5. Then the USB3 Docking Device is recognized as a Legacy Boot Device and I can boot from the Docking Device.
6. Installed USB3 PCIe card.
7. Connected the USB3 Docking Device to USB3 port.
8. Now I the Docking Device fails to appear as a Legacy Boot Device.
9. Connected the USB3 Docking Device back to the USB2 port and straight away it is now recognized as a Legacy Boot Device.
I would appreciate if any one can give some hints on how to get the USB3 devices recognized as legacy boot devices.
Many thanks.
Help us to help you by posting the following information.
1. The full Model No. and Product No. of the desktop PC - see This HP web document if you don't how to locate the model number and\or product number.
Enter the BIOS after you have setup the bootable Linux hard disk as shown in the following video andenable usb 3.0 configuration in Pre-OS if it is available in the BIOS. That will enable you to use the USB 3.0 port to boot your usb3 external hard disk with Linux installed.
Which flavor of Linux? The video explains how to do this with Ubuntu.
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

Noise when booting from external firewire drive

When booting from a Maxtor drive with OS10.3.9 to the iMac G5 with Tiger the fan makes a lot of noise. Why?
When I reboot into Tiger the fan is normal.
Reasons?
Thanks

The fans are controlled by code in the OS you boot from. It sounds like the OS you have on your external Maxtor is older then your iMac G5. As a results it may not have the needed fan control code. When that occurs, the Firmware in the iMac, sets the fans to a high speed to ensure your computer will not overheat.
Tom N.

Can't boot from external hard drive

I have a 250 GB OWC Mercury Elite-AL Pro Firewire drive that I use for backups for my MacBook Pro (running 10.4.8) and iBook G4 (running 10.3.9). The drive is partitioned into four parts, two of which I use for bootable clones of the MBP and iBook. I've been able to boot from the MBP clone, but whenever I try to boot from the iBook clone, after a few seconds of the gray screen with the Apple logo on it and the spinning circle, the Apple logo turns into a gray circle with a diagonal line through it, and the spinning thing keeps spinning, and it never boots up. (For lack of a better description, the circle with the line through it is a gray version of the symbol you see, for instance, in the Ghostbusters logo.)
Here's a few things that aren't (or don't seem to be) the problem:
- I'm not trying to boot from the wrong machine--i.e., I'm not trying to boot the iBook clone from the MBP
- Since I've tried creating the clone with both EMC Retrospect Express and SuperDuper and get the same result with both, it doesn't seem to be the backup software
- I've tried completely erasing the partition (including erasing the free space) from both the MBP and the iBook before creating the clone
- Just for good voodoo, I've also repaired permissions, reset the NVRAM, and run a disk repair on both the internal iBook disk and the clone
- The iBook definitely recognizes it as a bootable drive, since it shows up when I hold down the option key during boot, and also in the Startup Disk section of System Preferences
I'm a little stymied at this point. The only other things I can think of would be that (a) I need to completely reformat and repartition the drive (which I don't really want to do, since I also have other backups and data on there), or (b) for some reason the fact that I initially created the partitions on the MBP is preventing the iBook from using those partitions (i.e., I can only create Intel-only or PPC-only partitions, which I hope isn't the problem, since that would mean I'd need a whole separate drive just to back up the iBook).
Anyone have any idea what's going on?

The MBP and iBook require different partition schemes to be bootable. You won't be able to boot both computers from the same drive.
I can't install Mac OS X on a hard drive
If the installer won't let you install Mac OS X on a hard drive and gives as the reason "Mac OS X cannot start up from this volume," the drive may not have the partition scheme that the Installer requires. The needed partition scheme depends on the type of processor in your Mac. The installer installs Mac OS X for Intel-based Macintosh computers only on drives with the GUID partition scheme. It installs Mac OS X for PowerPC-based Macintosh computers only on drives with the Apple partition scheme.
To check the external drive's partition scheme, open Disk Utility, select the drive in the list, choose File > Get Info, and look for the "Partition Type." If you can't see the "Partition Type," you may have selected the volume instead of the disk. (Drives are flush left, with their volumes indented to the right below them.)
http://docs.info.apple.com/article.html?path=Mac/10.4/en/mh2315.html
John

Restore Disc Will Not Boot From External DVD Drive

I am using an original MacBook Pro that I decided could use a good restore, and started to clean house. The optical drive is broken, so I am using an external USB drive. I inserted the restore disc that came with the computer (It has OS X 10.4.6 on it), erased my HD, and proceeded to install Tiger. However, setup froze while installing Photobooth, and I was forced to shut down the computer.
I'm trying to get my Macbook Pro to boot from the restore disc that came with it so I can try setup again, but it won't work. If I hold C during the boot, I get a flashing folder with a question mark over it. If I hold option, I get a cursor, but just a blank, gray screen. In both instances, the external DVD drive is active and reading the disc, but I'm not getting any results on the screen. I've also reset PRAM.
If I can just get my computer to boot from the disc, I should be able to get back on track. Thanks.

When I press option during boot, nothing happens. Just a gray screen and cursor, like I described above. I haven't been able to test the external drive yet on another mac to see if it is bootable because I can't find the other computer's boot disc at the moment, but I'll try later with something else.
I have been able to access the drive through Target Disk mode successfully though. Is there something in particular I should do with the files? The folders are:
Applications
cores
dev
etc
Library
OSInstall.mpkg.998YblbM
System
tmp
Users
var
Volumes

G5 refuses to boot from external hard drive......

I have tried 3 different external firewire hard drive setups & it refuses to boot from any of them. This is extremely disturbing, because my trusty old G4 never had any issues like this. The latest one I tried is a Seagate enclosure (model # ST3500630AS), which is a Firewire external/SATA internal setup. The other one I have tried is my trusty old Kanguru S-80.0 (KU-35/81) - it has since been upgraded to a 120 GB drive internally. The third one I tried is a brand new Ultra enclosure (USB 2.0/Firewire 400) - the model# is ULT31310. This makes absolutely no sense. It will start to boot, but then it either gives me circle with a diagonal line through it or the Apple comes up & it just sits there (the fans will rev up after about a minute of sitting there). I cannot believe that 3 different firewire chipsets are not supported by the G5 for boot. If anyone has any ideas as to what is causing this problem, please let me know (It isn't a huge deal, as I can always yank the SATA backup drive & reinstall it into the G5 in an emergency, but I should be able to do it from an external drive). Any input will be greatly appreciated. Thanks in advance.
G5 2.0 DC/Pismo 400 Mac OS X (10.4.9) 1.5 GB, 16x DL DVD Burner, Nvidia 6600 LE/512 MB, Still going strong
G5 2.0 DC/Pismo 400 Mac OS X (10.4.8) 1.5 GB, 16x DL DVD Burner, Nvidia 6600 LE/512 MB, Still going strong

Did you reformat them to Mac Extended?
Did you install or clone the software onto the drive? what did you use?
Have you looked at OWC's FW cases? never had problem on my G4 or Mac Pro with their FW800 and 400 cases (all Oxford 911-912-924 which are mac friendly).
The Oxford 924 is FW800/400/USB2/SATA and accepts SATA drives.
http://www.macsales.com
You are getting kernel panics.
I avoid vendor cases. Most support PCs fine, but weak on Macs (even WD MyBook Pro).
One article today on Maxtor One Touch, older series, was that it would force a drive to 28-bit LBA mode, didn't support large 48-bit, and write to the drive's firmware. Again, avoid these vendor "solutions."
If you set it up and format it in Disk Utility, making sure to select Partition -> Options... APL format table, it should work. Other format types won't work.
Then use SuperDuper or Disk Utility to clone the drive (making sure that "ignore ownership" is OFF (not selected) in the Get Info for the drive volume.
I've got 8 FW cases from OWC and never had a problem with any.

Booting from external dvd drive

hi all,
my optical drive in the 17" mbpro (1st gen) has finally packed up and it doesn't make financial sense to replace it when the external lacie units are half the price. Before i make the plunge, does anyone know of any limitations, if any, of using the external drive as the boot device for installs?
Thanks

hey guys,
my cd drive is fried too and i am using an external USB cd/dvd drive instead.
But now i just bought leopard and to install it i need to set the mac to boot from the drive.
The problem is that even when i press alt/option key at startup, the drive is not inculed on the available list as if it is not recognised.
Can somebody help me out please?
Thanks

Force boot from external FW drive at startup?

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