Booting From SD Card, External Drive, USB Stick, etc...

If you configure an external HD, usb stick, sd card, etc. to be a startup volume for your mac, does the computer write or otherwise use the computer's 'default' internal hard drive?
For example, if I insert an sd card into an iMac and boot off of that and open safari and visit a website, once I startup again from the iMac's internal drive, will that appear in the safari's history when booting up again form the internal HD?
Will there be any trace otherwise of anything I do while booted from the sd card?
If I sent the iMac to DriveSavers or some other computer forensic analysis place would they find anything on the internal drive?
I'm inclined to think they would not, but I was hoping this could evolve into a technical discussion with somebody perhaps being knowledgable enough to explain how data travels from the internet, over the ethernet connection, to the motherboard, and then the hard drive. I try to visualize it, myself having a basic understanding, and I think that if there is an entirely different boot volume being used, the 'secondary' volume wouldn't even get written to - unless I obviousy elected to save a file to it.
*Oh, without sending super sketchy I thought maybe I should put this question into context. So, I'm a college student and I was thinking that maybe I could just spend a hundred bucks on an sd card and always have it with me and just go to the library or lab (or local apple store? thought I think they don't allow it) and boot from a 'host mac'. My concern is that I don't want to leave traces of a paper, or email, or private chat, or browsing history on the computer's internal hard drive. If this works I'll save like $1,000 - to a college kid that's like a billion dollars, even in this economy.
Thank you very much!
Tom

Each boot drive will use a different set of home folders, so the history and other settings created in one will not be available in the other.
The operating system is just software that loads from a storage device. For Macs this can be the internal drive, an external drive, a DVD, or a networked volume. This software loads at boot and allows use of the system's hardware (mouse, keyboard, graphics processors, etc.). Booting does not require the use of the internal drive. When the system is powered on it gets a list of all attached storage devices and will preferentrially try to load an operating system from the default boot device, but if it cannot or if it's instructed to look elsewhere (e.g., if you hold the C key to boot to a DVD), then it will load the operating system software from a different location.
When the system has an specific boot drive loaded, it will reference every location of where to save things from that drive. This is the "root" of the system, on which the system has references to storage locations both on the "root" drive and to those on other storage devices. Very briefly, the system sees your external drives simply as folders on your boot drive.
If you boot to an external drive, then this will be the "root" drive, and your system's internal drives will be likewise seen as folders like any other secondary storage locations.

Similar Messages

Can't boot from DVD or external drive

Because of recent slow performance on my iMac G5 I ran disk utility and repaired permissions, then clicked Verify Disk. It reported minor errors in directory files and said I should repair them. I tried starting up from the MacOS X installation DVD, but I get a spinning beach ball and a symbol with a circle with a diagonal line through it (like a Do Not Enter sign). I had to unplug the computer to reboot.
Using another computer, I made a startup disk on an external hard drive and tried booting the iMac from that, but I get the same beach ball and symbol. Tried another OS X DVD with the same result.
I am able to boot from the internal hard drive only, but then I can't do a disk repair. I have already reset the PRAM, but that didn't help.
Any suggestions ??? Thanks.

Because of recent slow performance on my iMac G5 I ran disk utility and repaired permissions, then clicked Verify Disk. It reported minor errors in directory files and said I should repair them. I tried starting up from the MacOS X installation DVD, but my G5 still starts from the hard disk and I am therefore unable to repair rthe hard disk.
Can I create a new startup disk by copying my installation disk, leaving off the installation software, and then start my Mac using Option "C".
On my previous Macs I always used Norton Utilities to repair my disk and recover files - are ther any similar packages available for OS X (10.4.7)?

Kernel panic when booting from DVD or external drive

Hey Folks,
I have a 13" MBP, seems to run fine for the most part.
However, I can't boot from DVDs or external hard drives. Disk Warrior, my and a tech support buddy of mine's OSX Snow Leopard DVDs, and external boot disks all cause a kernel panic when selected from the alternate boot menu when rebooting with alt.
The DVD/External spins up, the loading spinner goes for about 20-30 seconds, and then BAM - Kernel panic. I'd reinstall OSX... but I can't!
Any suggestions? I'd rather not send the computer to a tech for a week - I need it daily for work.

Kernel panic log:
Fri Nov 26 11:42:49 2010
panic(cpu 0 caller 0x2a6ac2): Kernel trap at 0x00000000, type 14=page fault, registers:
CR0: 0x8001003b, CR2: 0x00000000, CR3: 0x00100000, CR4: 0x000006e8
EAX: 0x57cd9408, EBX: 0x57983dec, ECX: 0x06fa2b80, EDX: 0x07fb9c80
CR2: 0x00000000, EBP: 0x57983e18, ESI: 0x07fb9f00, EDI: 0x00000001
EFL: 0x00010206, EIP: 0x00000000, CS: 0x00000008, DS: 0x00000010
Error code: 0x00000010
Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
0x57983ae8 : 0x21acfa (0x5ce650 0x57983b1c 0x223156 0x0)
0x57983b38 : 0x2a6ac2 (0x590a50 0x0 0xe 0x590c1a)
0x57983c18 : 0x29c968 (0x57983c30 0x7fb9f00 0x57983e18 0x0)
0x57983c28 : 0x0 (0xe 0x48 0x57980010 0x7fb0010)
0x57983e18 : 0x5389f2 (0x7fb5a00 0x7f62500 0x1 0x4fbe2a)
0x57983e78 : 0x536c27 (0x7f62500 0x7fb5a00 0x8006380 0x805e4c0)
0x57983f28 : 0x5371b8 (0x7f62500 0x8000140 0x0 0xffffffff)
0x57983f78 : 0x538e67 (0x7f62500 0x0 0x57983fac 0x1)
0x57983fc8 : 0x29c68c (0x7f85190 0x0 0x29c69b 0x74d03d4)
BSD process name corresponding to current thread: kernel_task
Mac OS version:
10A432
Kernel version:
Darwin Kernel Version 10.0.0: Fri Jul 31 22:47:34 PDT 2009; root:xnu-1456.1.25~1/RELEASE_I386
System model name: MacBookPro7,1 (Mac-F222BEC8)
System uptime in nanoseconds: 109525048606
unloaded kexts:
(none)
loaded kexts:
com.apple.driver.AppleIntelYonahProfile 14
com.apple.driver.AppleIntelPenrynProfile 17
com.apple.DontSteal_Mac_OSX 7.0.0
com.apple.driver.AppleHDA 1.7.4a1
com.apple.driver.AppleGraphicsControl 2.8.16
com.apple.driver.AppleIntelNehalemProfile 11
com.apple.driver.AudioIPCDriver 1.1.0
com.apple.driver.AppleUpstreamUserClient 3.0.5
com.apple.driver.SMCMotionSensor 3.0.0d4
com.apple.driver.ACPISMCPlatformPlugin 3.4.0a20
com.apple.driver.AppleBacklight 170.0.2
com.apple.driver.AppleIRController 161
com.apple.driver.AppleIntelMeromProfile 19
com.apple.kext.AppleSMCLMU 1.4.5d1
com.apple.GeForce 6.0.0
com.apple.driver.DiskImages.SparseDiskImage 281
com.apple.driver.DiskImages.ReadWriteDiskImage 281
com.apple.driver.DiskImages.UDIFDiskImage 281
com.apple.driver.DiskImages.RAMBackingStore 281
com.apple.driver.DiskImages.HTTPBackingStore 281
com.apple.driver.DiskImages.FileBackingStore 281
com.apple.driver.AppleUSBTCButtons 1.8.0b4
com.apple.driver.AppleUSBTCKeyEventDriver 1.8.0b4
com.apple.driver.AppleUSBTCKeyboard 1.8.0b4
com.apple.driver.AppleUSBCardReader 2.5.0
com.apple.iokit.SCSITaskUserClient 2.5.0
com.apple.iokit.IOAHCIBlockStorage 1.5.0
com.apple.driver.AirPortBrcm43xx 410.91.20
com.apple.driver.AppleFWOHCI 4.3.4
com.apple.driver.AppleUSBHub 3.7.8
com.apple.driver.AppleAHCIPort 2.0.0
com.apple.driver.AppleUSBEHCI 3.7.5
com.apple.driver.AppleUSBOHCI 3.7.5
com.apple.BootCache 31
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.driver.AppleEFINVRAM 1.3.0
com.apple.driver.AppleRTC 1.3
com.apple.driver.AppleHPET 1.4
com.apple.driver.AppleSmartBatteryManager 160.0.0
com.apple.driver.AppleACPIButtons 1.3
com.apple.driver.AppleSMBIOS 1.4
com.apple.driver.AppleACPIEC 1.3
com.apple.driver.AppleAPIC 1.4
com.apple.driver.AppleIntelCPUPowerManagementClient 90.0.0
com.apple.security.sandbox 0
com.apple.security.quarantine 0
com.apple.nke.applicationfirewall 2.0.11
com.apple.driver.AppleIntelCPUPowerManagement 90.0.0
com.apple.driver.AppleHDAPlatformDriver 1.7.4a1 - last loaded 109517592692
com.apple.iokit.IOBluetoothSerialManager 2.2f18
com.apple.iokit.IOSerialFamily 10.0.2
com.apple.driver.AppleHDAHardwareConfigDriver 1.7.4a1
com.apple.driver.DspFuncLib 1.7.4a1
com.apple.iokit.IOAudioFamily 1.7.0fc16
com.apple.kext.OSvKernDSPLib 1.3
com.apple.driver.AppleHDAController 1.7.4a1
com.apple.iokit.IOHDAFamily 1.7.4a1
com.apple.driver.IOPlatformPluginFamily 3.4.0a20
com.apple.iokit.AppleProfileFamily 40
com.apple.iokit.IOFireWireIP 2.0.3
com.apple.driver.AppleSMC 3.0.1d2
com.apple.NVDAResman 6.0.0
com.apple.iokit.IONDRVSupport 2.0
com.apple.iokit.IOGraphicsFamily 2.0
com.apple.driver.DiskImages.KernelBacked 281
com.apple.driver.AppleUSBMultitouch 200.20
com.apple.iokit.IOUSBHIDDriver 3.7.5
com.apple.driver.BroadcomUSBBluetoothHCIController 2.2f18
com.apple.driver.AppleUSBBluetoothHCIController 2.2f18
com.apple.iokit.IOBluetoothFamily 2.2f18
com.apple.iokit.IOUSBMassStorageClass 2.5.0
com.apple.iokit.IOSCSIBlockCommandsDevice 2.5.0
com.apple.driver.AppleUSBMergeNub 3.7.5
com.apple.driver.AppleUSBComposite 3.7.5
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.5.0
com.apple.iokit.IOBDStorageFamily 1.6
com.apple.iokit.IODVDStorageFamily 1.6
com.apple.iokit.IOCDStorageFamily 1.6
com.apple.driver.XsanFilter 402.1
com.apple.iokit.IOAHCISerialATAPI 1.2.0
com.apple.iokit.IOSCSIArchitectureModelFamily 2.5.0
com.apple.iokit.IO80211Family 300.20
com.apple.iokit.IOFireWireFamily 4.1.7
com.apple.iokit.IOUSBUserClient 3.7.5
com.apple.iokit.IOAHCIFamily 2.0.0
com.apple.iokit.IOUSBFamily 3.7.8
com.apple.iokit.IONetworkingFamily 1.8
com.apple.driver.AppleFileSystemDriver 2.0
com.apple.driver.AppleEFIRuntime 1.3.0
com.apple.iokit.IOHIDFamily 1.6.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.TMSafetyNet 6
com.apple.kext.AppleMatch 1.0.0d1
com.apple.driver.DiskImages 281
com.apple.iokit.IOStorageFamily 1.6
com.apple.driver.AppleACPIPlatform 1.3
com.apple.iokit.IOPCIFamily 2.6
com.apple.iokit.IOACPIFamily 1.3.0

Mac Pro will not boot from cd or external drive

My Mac has an issue whith the boot drive, and I would like to format the drive and reinstall OS-X Mountain Lion and then use Time Machine to resore the Data. When I try to boot my Early 2009 Mac Pro (OS-X 10.8) using the option key, it loads the scrren that allows me to choose among the bootable drives. Once I choose either an external drive or CVD, it loads to the apple screen, stays there for about 5 minutes, then loads the OS on the main drive... Any ideas would be greatly appreciated.
Bill Mueller

At first I was just going to say it sounds like you have a bad optical drive, but then you had to go and say that it also won't boot from a HDD.
That just makes things a whole lot worse.
Start by removing the side cover and checking the RAM to see if any of the LEDs are lit up indicating bad RAM. Usually if there's any bad RAM found, it will just automatically disable that stick, but maybe yours isn't for some reason.
Look for any other LEDs that may be lit. Generally speaking, the only time you should see an LED (outside of the power LED) lit consistently is if there's a problem.
You should also see if you can get Apple Hardware Test to run, which may or may not find some problem.
But sorry to say, it's sounding very suspiciously like a bad logic board.
One other thing to try, is putting the SL drive into a different slot. So if you were putting it in slot 2, try slot 3 or 4. If you just have a bad SATA port, you might be able to just work around that until you get a new system.
If by chance this system is still under warranty, do not walk, do not pass go, do not collect $200, RUN to the nearest AASP or Apple store to make it THEIR problem to sort out.

New Unibody MBP won't boot from DVD or external drive, just loops

Hey
We bought a new Unibody MBP on Monday, and loaned it to our CTO for a presentation. Having got it back from him now I wanted to nuke the installation and put a fresh copy of leopard on it, so I dropped the DVD in the drive, powered down, and booted holding the "C" key.
I get the chime, screen lights up, thinks for a bit, and if you use your imagination you can almost hear the DVD spin up. Then the screen goes black, lights up, chime, thinks a bit, goes black, lights up, chime and so on
I've tried booting from an external bootable clone I created with CCC (firewire external HDD), and same symptoms.
I even tried swapping in a hard drive that I know has a working bootable copy of Leopard on it, and then all I get is the eternal cycle, without pressing any keys on startup.
I also tried holding down the Option (Alt) key on boot to get the boot device selector. This correctly identifies the various boot devices - the DVD, on-board HDD and external firewire drive (if connected), and lets you select them, tries to boot, thinks, black screen, screen lights up, chime, repeat cycle endlessly until extremely frustrated.
Is there a known cure for this or am I doomed to take the thing back to the Apple store on Monday?
Thanks
Konrad

Raj wrote:
That is not the reason it didn't work. Here is the actual clarity:
*A retail Leopard DVD should be able to boot a new Macbook Pro unibody.*
So you are saying even if the driver for the controller on which the DVD drive sits is not available in the Leopard DVD you are using because the hardware was not manufactured at the time the Leopard release on the DVD was made, the OS should magically just boot? How is that possible? Unibody MacBook Pros have entirely NEW AHCI chipset - for which there won't be any drivers on the older Leopard DVD and as such the DVD wont be detected once the OS on the DVD loads. In cases where the chipset used is same (as in previous generations of MBP) it will boot.
The key difference here is that if you used an older version, some new hardware may not be supported - however, the computer *should still boot from the DVD*, which is the subject of this discussion.
The OP said that his computer boots from the DVD that came with the computer - just not with the old retail Leopard DVD. Also - what should happen if the new hardware happens to be the controller on which the DVD drive is sitting? How will it be able to read the DVD? What about the graphics card? If the drivers on the old leopard disk do not recognize the new graphics card - how is the OS going to display on screen?
On my way home, I stopped at a Mac store and asked them to test this. They successfully booted a new Macbook Pro unibody from an older Leopard DVD. And this is why Apple is replacing my computer, because it is a hardware issue, not a software one.
Again - you fail to understand that whether or not the old DVD boots on a new machine all depends on how much hardware has changed and what hardware has changed. It may boot on some generation of machine because the basic chipset and graphics did not change or were handled generically by the drivers on the older DVD but it may totally refuse to boot on new gen machine which has totally different / incompatible hardware.
So your claim that any old Leopard DVD must continue to boot on any new machine is not really technically explainable.

MBP 13' Won't boot from CD or external Drive

Recently my MBP 13 (newest version) occasionally crashes with the grey screen death which forces me to hard shut down. This led me to believe my directory may be corrupted so I tried to boot from my external OS X (Snow Leopard) with DiskWarrior installed to do the repair. Unfortunately, when the grey Apple logo shows up, the computer crashes again.
I tried again using original recovery CD to boot hoping to use Disk Utility, but it does the same thing where it crashes at the Apple logo.
I can't seem to figure out why. Anyone have experience with this issue? how do I resolve this issue???!
Thanks

JL9283 wrote:
The external drive is a clone of a different computer.
This could be why it won't boot to it. It may not have the correct drivers to run the 13'. You really should have a clone of each Mac you own. Perfect for trouble shooting this type of thing. You can partition an external to have clones of several different Macs. I do that, plus I clone each to an extra internal on the desktop models.
However, if this have any impact it should've occurred in the past?
I think you just got lucky in the past.
I just spent 2 hrs re-installing OS X again and restoring. It's still doing the same thing. (It appears I can boot from the restore CD, but not external drive).
What install method did you use please?
If you can boot from the DVD, go to disk utility and see what your internal drives S.M.A.R.T. status is. Might as well run a Disk Repair while you are there.
Also, since you can boot from disks,
I would try running the extended version of your Apple Hardware Test.
It's not perfect but may flag something.
I'm assuming you can't boot from your DiskWarrior disk cause it's an older version that won't boot the new 13'?
That's the case for me and my MacBook. Since you can't boot to your bad clone, do you still have another Mac around? If so, you could boot in Target Disk Mode and use Diskwarrior from the other computer to try and repair the 13'.
DALE

Will Late 2013 iMac boot from Snow Leopard External Drive?

Hey gang-
Got a new late-2013 iMac for Christmas (yayyyy!!)
I plan on running Mavericks for day-to-day use, but there are a few old Power PC apps that I occasionally need to run. Does anyone know if the new iMacs will boot from an external drive running Snow Leopard? I have an external Firewire drive with Snow Leopard on it and I'm wondering if the new iMac will boot from it if needed.
Thanks!
Dave

Thanks gang. No worries- I keep an older Intel MacBook with Snow Leopard on it and I suppose it will do in a pinch.
Cheers!
Dave

Can't boot from my firewire external drive

I have a 80 Gb LaCie firewire drive where I have installed (since Phanter) an operating system. All things were OK until I updated the system to OS X 10.4.10 in my G3 iMac (slot-loading). Since then I was unable to boot from the external drive. I had updated the drive's firmware, installed OS X 10.4.10 in it, but nothing has solved my issue. Can anyone help me with this?
Helder Monteiro
iMac G3 slot-loading Mac OS X (10.4.10) iBook G4 - 10.4.10

Helder,
I apologize if I sounded like I was finding fault with your use of English, which I think you use very well. My own abilities with any foreign language are embarrassingly poor ... & I'm not that great with my native English one either!
My concern was that we were not communicating well enough for me to understand your situation well enough to suggest anything that would not make things worse. I'm still not entirely sure of that but let me review what I believe it to be before proceeding:
You have a LaCie external hard drive that both your iMac & PowerBook recognize when either is started up from its internal copy of 10.4.10. With either one, the drive mounts & you can read & write files on the external without problems. The only problem is neither Mac will start up from the external drive, which has a copy of 10.4.10 installed on it in the same way as with your Mac's internal drives, that being booting from the Tiger installer disk, installing the base version of the OS on it & then updating it to 10.4.10 with some succession of Apple updates downloaded from Apple. You have also tried the PPC version of the 10.4.10 combo update. None of this has resolved the problem.
If this is all true & accurate, then I suggest you start by attaching the drive to one or the other Mac while booted normally & seeing if the external drive appears as a choice in System Preferences > Startup Disk. You do not have to select it if appears; the test is just to see if the Mac recognizes it as having a valid OS version. If it does appear in the list, hover the mouse pointer over it until a popup box appears, which will tell you the version of the OS installed.
If it does not appear in the list, it means there is no valid version of the OS installed. If it does, you could try selecting it & restarting, but I suspect from what you have said, it won't work -- the Mac will display a question mark for a while on startup, eventually give up on the drive & start from the internal one. (If so, don't forget to reset the startup disk to the normal one to speed up future restarts.)
Either way, launch Disk Utility & run the "Repair Disk" function on the external drive. If it finds anything wrong, continue to repeat the repair until it passes. If it reports failure, stop & report that here before continuing.
If the drive was recognized in the system preference, also run the "Repair Permissions" step. (if not, it is unlikely this will be an option.) If the drive passes both tests now, try booting from it again by whatever method you prefer.
If it does not work now, I think you will have to reinstall the OS. If you have room on the drive, an Archive & Install will probably work. If not, you will need to consider "cleaner" install methods, which we can discuss if you wish.
Good luck!

How can you get a imac to boot from install disc(external drive)

It tries for a while then says you have inserted a disc mas osx does not recognize.

sirmark1:
Thanks for the clarification. It helps to get a better grasp of the situation.
If you have not already done so, try this:
• With computer shut off insert disk in external optical drive.
• Start up computer and immediately after chime hold down Option key.
• If CD shows up select it and click the straight arrow.
However, the version of Mail you get from Jaguar will be the earliest version of Mail, whereas the version of Mail in Panther is 1.3.1. You can download 10.3.9 Combo Update and either install the update, or try to extract Mail from the Combo update using Pacifist
Hope one of those work for you.
cornelius

Hi, I have a hard disk failure so to recover my data I am using disk utility to restore the data on an external drive while booting from a second external hard drive. When I perform the operation it gives me an input/output error and stops. Any tips?

Hi, I have a hard disk failure so to recover my data I am using disk utility to restore the data on an external drive while booting from a second external hard drive. When I perform the operation and after having selected both my destination and source drives, the operation begins but soon fails due to input/output error. If I try to create an image of the drive it gives me the same error message. Any help would be much appreciated.

Disk Utility only creates a image of the drive, so it's no help getting exactly what you want, which is your files. If the file structure is messed up or the drive is failing then it's no help.
If you have a external boot drive and you can't access the internal non-booting drive though the typical Finder and windows to transfer your files via drag and drop methods, then you need to install Data Rescue on the external boot drive and it will do as best as it can to recover your files. (works on non-encrypted/non-Filevaulted drives only)
.Create a data recovery/undelete external boot drive
Are you sure you have hard drive failure, or that OS X isn't merely not booting?
Because if the drive is working physically, then there is a host of fixes
..Step by Step to fix your Mac
https://discussions.apple.com/community/notebooks/macbook_pro?view=documents#/

10.9.2 install Bootcamp win7 64bit iMac mid 2010 no bootable device - external superdrive, USB Stick

Hey all,
big problem here.
Trying to install Bootcamp on my iMac 27" mid 2010.
The thing is, during the installation, i get the "no bootable device" black screen, and i think i know why... but i need help.
System, a mid 2010 imac, 2TB HD ( Original) and an SSD Samsung 1TB at the Optical Drive SATA connection.
2TB HD is empty atm. OSX Installed on the SSD.
Bootcamp Assistant. Problem nr. 1.
He first did not want to let me create an USB drive. after hacking the assistat, deleting the "Pre" thing in the info.plist, that worked so far.
https://discussions.apple.com/thread/5479879?start=105&tstart=0 and several other postings got me so far.
Then when using the assistant, after choosing partition and so, when the iMac restarts, i get the "no bootable device" notice.
Read a lot, and it seems, that older iMacs, that originaly came with an internal superdrive only can install win 7 from that internal superdrive.
I have the problem, that i had it removed to put the SSD there.
So, when doing an EFI Boot, choosing the win USB Stick or the Win in my External Superdrive, - "no bootable...."
So i searched more. rEFIt should help. Installed, and all, doesnt work, same thing. As soon as i want to boot Win from the CD or Thumpdrive, doesnt work. :-(
In one of the many posts, someone wrote something about starting Shell in rEFIt first, etc... didnt work as well.
then i found this post:
http://www.andrewsavory.com/blog/2011/2156
sounded promissing. Somehow getting win installation files onto the Created Bootcamp partion with Virtual Mashine. But it didnt work for me.
The VW Fusion ware is different, and non of the steps he discribes works.
So how can i get it working.. it seems like it is somehow blocked to access something from the USB Ports.
Logicaly i would have to get the installation files onto a Internal drive. i Tried to create a partition and copy the Win 7 USB Thump using Disk Util Progeam onto a seperate, internal partition.. but he just does not what to do that... errormessages when trying to copy it, recreate the drive, etc.
So, i do have a 2TB internal HD, which i can use, an external superdrive, USB.Sticks. any gameplan?
And for Error-excluding: i have an original Win 7 64 bit CD, a burnd one and controled the Hash of the loaded ISO, which i downloaded for the USB-Stick.
Any help? pls!!!

Hi Sam, the Mini Optical may draw too much USB power.
Can you restore that .iso to the Flash Drive as a CD/DVD instead of an image file?

Will bios boot from SDHC cards?

I'm trying to put an Arch Linux install on a 32GB SDHC card. I'm able to install the required files, but for whatever reason I can't get the SDHC card to show up in the boot menu, and UEFI doesn't seem to work. Of course, I haven't had any luck with UEFI booting on the W530 for some reason. I can get UEFI to work fine on my desktop, but no luck on the W530 from regular hard drives or my SDHC card.
Will the W530 recognize and boot from SDHC cards that have GRUB installed on them? So far I've had no luck with that. The card never shows up in the boot menu. I can't even get it to boot installer images. Booting from USB works just fine.
Solved!
Go to Solution.

The SDHC reader on thinkpads is attached to the PCI Bus. Makes for faster Read write, but kills booting from it.
W530(2436-CTO): i7-3720QM, nVidia Quadro K2000M,16GB RAM, 500 GB hard drive, 128GB mSATA SSD, Ubuntu 14.04 Gnome, Centrino Ultimate-N 6300.
Yoga 3 Pro: Intel Core-M 5Y70, Intel HD 5300, 8GB RAM, 128GB eMMC, Windows 8.1, Broadcom Wireless 802.11ac.

I want to Boot from My old hard drive.

I an trying to do this work around so I can continue using protools 7 with my MBP running Snow leopard. I pulled out my old hard drive running Tiger and put it into a USB case. I installed a new 650GB hard drive in to my laptop, installed Snow Leopard and reinstalled all my old software. So far so good. Now I want to boot from the old hard drive running Tiger so that I can launch Protools 7. I choose the external HD as the startup disc and end up getting a circle with a line through it on startup.
Is there something else I need to use my old hard drive running Tiger as a startup disk?
Thanks!

If the original HD still has the version of Tiger installed on it that came with the MBP (probably Mac OS X 10.4.8, build 8N1037, 8N1051, or 8N1430) or a later version of Tiger like 10.4.11, then the MBP should be able to boot from it.
To determine what OS & build number is on that drive, open the Startup Disk system preference. Hover the pointer over the drive's image in the window & the OS version & build number will pop up in a ToolTip window after a brief delay. What does it show?
Also, which MBP do you have? Open System Profiler to the Hardware Overview page. What is the Model Identifier shown in it? Is it "MacBookPro2,2" or something else?
Assuming the OS version & build number are sufficient to boot the MBP, it may be that the USB enclosure does not support booting. Most do, a few do not. What is brand/model of the enclosure? Do its specs specifically say it can boot a Mac?
If all of this seems OK, you can try running Disk Utility's two repairs (permissions & disk) on the external drive. If no errors are found, you may be able to get it to boot the Mac by reinstalling Tiger on it from the original system disc set. This will require updating the OS to the latest version you had installed on it for best results.

HT4818 Does anyone know if you can boot off of an external drive?

Im wondering if i can boot windows off an external drive

I'm not certain if it was changed recently or not, but BootCamp did not allow you to boot from an external drive. In fact, in a laptop, BootCamp would only let you boot from the primary internal drive. Since the Windows installer/bootloader wold need to know how to access an external drive, you would need to use a drive connection method that Windows supports natively at boot time, so I don't believe that you can use USB (without building a custom installer). You might be able to use a Thunderbolt drive if you happen to have one of those. Of course, there are those who would also tell you that anything less than a Tunderbolt drive performance would make the Windows OS painfully slow, so that is something to consider...

ZTE OPEN C boot from SD card

I have an ZTE OPEN C hardbricked into QHSUSB_BULK mode (trying to flash flame image)
Does it support boot from SD card or there is any other method for debricking?

My brick is totally bricked - there is no fastboot or adb modes. When I connect it dmesg shows
[Сб. нояб. 8 10:31:55 2014] usb 1-1: new high-speed USB device number 15 using ehci-pci
[Сб. нояб. 8 10:31:55 2014] usb 1-1: New USB device found, idVendor=05c6, idProduct=9008
[Сб. нояб. 8 10:31:55 2014] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[Сб. нояб. 8 10:31:55 2014] usb 1-1: Product: QHSUSB__BULK
[Сб. нояб. 8 10:31:55 2014] usb 1-1: Manufacturer: Qualcomm CDMA Technologies MSM
[Сб. нояб. 8 10:31:55 2014] qcserial 1-1:1.0: Qualcomm USB modem converter detected
[Сб. нояб. 8 10:31:55 2014] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB1

Booting From SD Card, External Drive, USB Stick, etc...

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