Problem booting in OS X 10.3

I have a G5 that was running Mac OS X 10.3. I had an issue with Roxio Toast and the system crashed. When I rebotted the machine it would come up and just sit on a folder with a question mark in it. i tried repairing the disc but it could not do it. I reloaded the OS and occasionally it will still do that. If I have the install disc in but have it booting directly to the hard drive then the folder will come up but then boot into the OS but if I do not have the disc in than it will sit there for a minute and sometimes boot to the OS and sometimes not. I wanted to know if anyone had any ideas of why I would still be seeing this problem even after I installed the OS.

you have to set the startup disk in System preferences to the actual hard disk, otherwise _the mac tries to boot from all possible devices_, _including the network_, which it tries to search for remote bootable volumes.
*On Boot-up, direct after the start tone :*
If you press D on your keyboard, it tells the MAc to boot from the internal Disk.
C will cause it to boot from CD, Option ( alt ) will bring up a selector, that shows all bootable drives.
Once you are inside OS X, set the Boot Disk properly.
If all fails, then _you must also think of the harddisk starting to die_. Check it with Diskutility "Verify/repair volume" not only "repair permissions", better with professional tools like Techtool or Diskwarrior if you have one of those.
note : to properly repair a internal disk with Diskutility, you need to start from the Mac OS X CD and run Diskutility from the "outside" - while you are on the CD, so no Operating System is currently using the internal disk.
Start backing up all important data as long as the drive is working.
*Because you mention that the Mac will always boot if the CD is inserted, the problem has to be the harddisk or a missing startup command set in Startup Disk.*
Best wishes.

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Problem booting w520

Hi,
I'm having a problem booting my w520. I suspected that I had bad ram (unrelated issue), so I ran the windows memory diagnostics tool. I plugged it into my AC adapter that came with the laptop, and left it running since it takes a long time. When I came back the laptop was on the screen asking me whether to boot from the windows boot manager, my SSD drive or my DVD drive, which I thought was weird. I selected the windows boot manager, it gave an error (could not initialize BTI or something like that which I wish that I remembered now). I tried to restart the laptop, but it refuses to do so. Instead of starting up, it goes into a reset loop -- it starts up, I the keyboard LED light comes on, and then it restarts. It does that loop every 5 seconds or so. Nothing is displayed on the screen, and there are no beeps. It never gets to the post screen. The only way to get it to do anything different is to remove all RAM, in which case it does that 1 3 3 1 beep sequence. From other threads I followed suggestions to unplug it, remove the battery and do all sorts of pressing/holding power buttons for 10-30 times. Nothing helps.
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You have already done a few of the things I would suggest. You could try one memory chip at a time in one memory slot at a time.
If you still have warranty now would be a good time to make a call for service.
Brad

Problem booting from Hdd

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K8T Neo-FSR problems booting

Hi
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Problem booting Solaris 10 on ProLiant server after installation.

Hi all!
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Update CD created from HP provided ISO image. Solaris 10 is
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1) At the begining of Solaris installation, Driver Update is used to
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According to documentation, this case occurs when PCQary3
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I'm also able to find instaled Solaris using 'install-recovery' and mount
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I've already tried (without success):
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2) Create only 3,5GB partition instead of 700GB large one.
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4) Re-create boot archive using 'bootadm update-archive -R /a'
So, everything seems to be installed correctly, but system cannot boot.
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Sounds like an issue I just had with a brand new X4150, installation and failsafe worked fine, but normal booting led to immediate reboot of the server. This was due to an incompatibility of solaris and intel's newest generation xeon chips.
You can still boot 'normal' solaris in 32-bit mode:
hit 'e' at the grub menu, 'e' again to edit the 'normal' boot entry and add 'kernel/unix' after multiboot. This should boot up solaris in 32-bit mode. From there, download and install the latest patch set (125370-06 and 127112-05 are fixing this issue). After that you should be fine.
Bjoern

Problem booting Lion after restoring disk from Time Machine

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Can't see SMART status anywhere in Disk Utility, shouldn't it just be visible at the bottom of the window when I click on the disk? Verify disk returns OK. I do have the correct format option.
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[URGENT] Problems Booting from External HD

I'm at a complete loss on this one. I'm a pretty competent Mac geek, and even I can't figure this out. Bear with me, I'll try and explain my problem as best I can. First, some basic info:
My hardware setup:
• iMac G3 600MHz
• 1GB RAM
• 120GB internal HD, running OSX 10.4.7
The computer's internal drive is used by someone else for work during the day. I run all of my files and programs from a 2nd HD, which I boot from:
• Seagate 300GB HD
• Bytecc combo USB/Firewire drive enclosure
Software:
The only recent install I've done is Super Duper, which I did after I began having problems. I used it clone my Firewire boot drive to a (backup) 400GB external USB/Firewire drive, and I restored from the clone once when I began having the problems that now appear to have come back. At the time, it appeared that restoring from the clone had solved my problems. I'm fairly certain that my problems are software-related: I've installed the drive in question in another Mac (internally), S.M.A.R.T. status appears fine. I'm not using anything awful like Norton Disk Doctor, I've tried rebuilding the volume using DiskWarrior, without success.
Problem:
I am unable to boot from my Firewire drive. When I start up using it, everything appears normal, until I get to the boot panel. The progress bar loads very slowly, and only gets about halfway finished before the login panel appears on top of it (even though the boot drive is a single-user volume, set to login automatically). The username and password fields are both blank, and if I enter my username and password it says it's incorrect.
Symptoms:
• OSX/programs become unresponsive after waking from sleep. Computer freezes, and most recently the screen went completely gray. After forceably turning off the computer and HD and restarting, I get the problem I just mentioned with the login panel. I don't have any problems waking from sleep if I'm booting from the computer's internal HD.
• Certain programs (notably iTunes and Adobe CS2 apps) periodically become unresponsive and quit. Several times I've gotten an "unknown error" message from iTunes saying that it is "unable to save the iTunes library". Both of these issues usually precede the main problem of being unable to boot/login.
• Occasionally, if I boot from the computer's internal HD and then switch on the external, it refuses to recognize it as being a formatted OSX extended (journaled) volume. Turning it off for several minutes and then turning it back on sometimes fixes it, as does repairing it using Disk Utility.
These problems have been plaguing me for months now, and with more than one external HD (although using the same enclosure). Everytime I do something to fix it, the problems seem to go away for an increasingly shorter amount of time, before reappearing, each time slightly worse than before. I'm convinced all of the issues I've been having are in some way related, I just can't figure out how they're related (or what I can do to fix them). Hopefully, one of you can help me.
iMac G3 600MHz Mac OS X (10.4.7) 1GB RAM | 120GB HD (Internal) | 300GB HD (External) | 400GB HD (External)

I occassionally get a similar problem, when playing a corrupt video via mplayer. The scrren freezes and I have to poweroff. When I log back in no user and no password is valid, even when root is enabled.
Solution: replace from a cloan. You will need to boot from a good cloan before you can do this, and be able to retain the original permissions.
I use: sudo rsync -avE /private/var/db/netinfo/ /Volumes/vol-name/private/var/db/netinfo
PB 15 1.5 Ghz

[Solved] Problem booting root in LVM, which spans two LUKS partitions

Hello,
I recently switched to Arch from OpenSuse, and I'm having a bit of trouble getting my encrypted disks to boot properly. I have two disks, the first is a 4 TB drive set up like this:
MBR partition table
Partition 1 - Windows 7, 200GB
Partition 2 - Linux boot, 200MB
Partition 3 - Luks partition, 1.7TB
Partition 4 - Luks partition, 1.7TB
Within partition 3 and 4 is an LVM volume which spans the two partitions. The reason for that is just that I can't have a 3.4TB partition on an MBR formatted drive (as I understand it). I have the root volume and swap, etc within this LVM. The second hard drive is simply a data drive, also encrypted. My problem is that I don't know how to tell the system to open both of these encrypted partitions at boot, in order to boot the root volume. This worked fine under OpenSuse and I only needed to enter the Luks password once (it is the same for both partitions).
As it is right now, my boot parameters in /etc/default/grub look like this:
GRUB_CMDLINE_LINUX_DEFAULT="quiet nomodeset cryptdevice=/dev/sda3:sda3_crypt root=/dev/mapper/vg_arch-root"
Currently the system boots, asks for the password to /dev/sda3, hangs for roughly 20 seconds and then kicks me into a root prompt. I can manually open /dev/sda4 at this point using cryptsetup and the system will continue booting normally... but I would like to have it set up properly, so I don't need to do that. Considering OpenSuse does this out of the box I figured it should be possible under Arch. Any help would be appreciated.
Thanks
Last edited by keitolainen (2015-06-09 21:56:08)

As a quick update in case anyone is reading this, I cleaned up the script a bit and hopefully made it something closer to a "proper" fix.
Rather than editing /usr/lib/initcpio/hooks/encrypt directly, I did the following:
cp /usr/lib/initcpio/hooks/encrypt /etc/initcpio/hooks/
then changed the following section of /etc/initcpio/hooks/encrypt from:
# Ask for a passphrase
if [ ${dopassphrase} -gt 0 ]; then
echo ""
echo "A password is required to access the ${cryptname} volume:"
#loop until we get a real password
while ! eval cryptsetup open --type luks ${resolved} ${cryptname} ${cryptargs} ${CSQUIET}; do
sleep 2;
done
fi
to:
# Ask for a passphrase
if [ ${dopassphrase} -gt 0 ]; then
echo ""
while true ; do
echo -n "A password is required to access the ${cryptname} volume: "
read -sr password
echo $password | cryptsetup open --type luks ${resolved} ${cryptname} ${cryptargs} ${CSQUIET}
if [ $? = 0 ] ; then
break
fi
done
echo $password | cryptsetup open --type luks /dev/sda4 sda4_crypt
echo ""
fi
then edited /etc/mkinitcpio.conf and changed:
FILES=""
to:
FILES="/etc/initcpio/hooks/encrypt"
and ran
mkinitcpio
This is working well for me and I think it's a little cleaner than the solution I posted earlier. Sorry for the awkward bash, if anyone has a more elegant solution please let me know.

Kt8 neo2 6702 200gb hard disk problem booting/recognising bios v9.3

Hi,
just bought a new msi kt8 neo2 series m/b. MS-6702 E It has 1gb ddr 3200 ram 400w generic psu amd64 3500+ cpu sblaster audigy + generic net card + xpertvision 6800gs 512mb video card. The proble is the hard drive, I think? its a samsung 200gb that was working fine in my last puter untill i put it into my new one. it has xp on the 1st partition and kubuntu on the second with grub as the boot loader. everthing was hunkey dorey in the last system, but wheni try and boot grub gives me a error 17 and with a bit more fiddling tells me it cant mount the selected partition because the bios does not recognise that many cylinders or sectors, cant remember exactly. Have tried a different boot loader including lilo without success. The disk is recognised in the bios as a 33.2 or 32.3 gb drive? i have flashed to v9.3 successfully, after accidently hosing the previous board with a bad flash from my stupidity anyhow has anyone else come across a problem like this? i had a look in the stickies and searched a bit but couldnt find anything. If i boot a linux live cd it can see the drive fine at 200gb and access all my old data without a problem. any help would be greatly appriciated as im about to pull out the last of my hair am i missing a setting in the bios? to enable lba 48bit addressing or sumthing? I have flashed older computers and then the bios recognised big drives but this one refuses to? does it not support them? heeeeeellllppp!!!
John

Thanx for your resonses. I have tried reinstalling Kubuntu and grub with the same result. but even if i get rid of grub, the bios is still seeing my 200gb hard drive as a 33.8gb one? wherever it pulled that number out of, who knows. so if i can boot into a console the "fixmbr" command will do what? remove grub and replace it with what? I have tried installing other boot loaders (lilo and gag) but with the same problem they all have a hissy at this 33.8gb drive thats all up
Kind Regards,
John

Problem booting Arch after first install on MacBook Pro

Hi all,
I've spent the past month intermittently trying to install Arch on an old MacBook Pro with a broken screen running in clamshell mode (I've reformatted, clean installed OSX, and run pacstrap around 20 times now). I was originally trying to install Debian, but the Arch Wiki was so good that I switched. The issue has been the same anyway.
Every time I try to install, I get stuck at the bootloader stage, where I need to make the installation bootable. It doesn't matter what bootloader method I use, since I've tried:
Boot from /boot partition with GRUB
Boot from separate HFS+ GRUB partition
Boot from Apple EFI System Partition (ESP) with GRUB
Boot with rEFInd
Boot with rEFInd installed to the ESP
Arch itself works fine, but when I go to boot from rEFInd's autodetected vmlinuz-linux from 128MiB ext2 partition, I get the same error message I've gotten with every other configuration:
:: running early hook [udev]
:: running hook [udev]
:: Triggering uevents...
[ 0.558033] uhci_hcd 0000:00:1a.0: Found HC with no IRQ. Check BIOS/PCI 0000:00:1a.0 setup!
[ 0.558097] uhci_hcd 0000:00:1a.0: init 0000:00:1a.0 fail, -19
[ 0.558135] uhci_hcd 0000:00:1a.0: Found HC with no IRQ. Check BIOS/PCI 0000:00:1d.0 setup!
[ 0.558189] uhci_hcd 0000:00:1a.0: init 0000:00:1b.0 fail, -19
Waiting 10 seconds for device /dev/disk/by-uuid/2b121a89-aeb9-430a-8e6c-a05b79f08427 ...
ERROR : device 'UUID=2b121a89-aeb9-430a-8e6c-a05b79f08427' not found. Skipping fsck.
ERROR: Unable to find root device 'UUID=2b121a89-aeb9-430a-8e6c-a05b79f08427'.
You are being dropped to a recovery shell
[etc.]
When the Arch .iso live CD boots, it gets the first uhci_hcd errors, and then just moves on with:
:: hook [memdisk]
:: hook [archiso]
[etc.]
Here are the contents of my refind.conf file (/boot/efi/ESP/refind/refind.conf) (I omit all the standard comments):
timeout 0
scan_all_linux_kernels
[The example menu entries - all disabled]
menuentry "Arch Linux" {
icon /EFI/refind/icons/os_arch.icns
"Arch Boot"
loader /vmlinuz-linux
initrd /initramfs-linux.img
options "root=/dev/sda7 rw rootfstype=ext4"
And my refind_linux.conf (/boot/refind-linux.conf):
"Boot with standard options" "ro root=2b121a89-aeb9-430a-8e6c-a05b79f08427"
"Boot to single-user mode" "ro root=2b121a89-aeb9-430a-8e6c-a05b79f08427 single"
"Boot with minimal options" "ro root=2b121a89-aeb9-430a-8e6c-a05b79f08427"
My custom menu entry for Arch doesn't work either (I'm still researching exactly why). I've been quite confused by different posts all over by different people on how to configure the manual refind.conf stanzas. I also tried a direct to root menu entry, where I tried the files as /boot/vmlinuz-linux, etc.
The error I always get here is the same:
Starting vmlinuz-linux
Using load options "[same as above]"
Invalid loader file!
Error: Not Found while loading vmlinuz-linux
I've installed GRUB as well, just to be sure. Although I haven't moved it to any other partitions or 'blessed' it in OS X. (I have blessed the HFS+/EFI partitions when I used GRUB.)
Just FYI, I've used the following pages as guides:
My primary guide: Cody Littlewood's installation procedure for a MacBook Pro
The Arch Wiki MacBook Page, which was useful but a bit confusing and self-referential on the Bootloader section
The rEFInd website, by Rod Smith. I've read it fairly extensively (including an interesting comparison of SodaStream flavours)
A Gentoo Wiki page with a rEFInd example
The LFS GRUB chapter, and surrounding material
And I've largely read the Arch Wiki Beginners' Guide, Bootloaders page, GRUB page, GRUB EFI examples page, UEFI page and EFI Stub Loader page.
There have been others, but it's been a while since I read them. I've been trying to make this work for a while.
I've also looked at some other posts on similar subjects:
A post on the Arch Linux subreddit matching my (previous; with GRUB) situation, but not fixing my problem
An Arch forum post, of which there have been others, but google seems to have changed my search results.
EFI-Booting Ubuntu on a Mac, by Rod Smith
The Debian MacBook Pro page
A post about booting Debian without rEFIt
Again, there are more, but I can't find them all just now.
I've looked EVERYWHERE for a solution.
My question is, does anyone have any ideas on how I might make my computer bootable?
Almost forgot; I've run
mkinitcpio -p linux
successfully (I get the two driver warnings that seem to be standard).
Computer specifications are as follows:
Model Identifier: MacBookPro6,2 (mid 2010)
Processor Name: Intel i7
Architecture: amd64
RAM: 4GB DDR3
Graphics: NVIDIA GeForce GT 330M 512MB
Software: OS X 10.9.2
My disk partition table is as follows:
$gdisk -l /dev/sda
GPT fdisk (gdisk) version 0.8.9
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Fround valid GPT with protective MBR; using GPT.
Disk /dev/sda: 976773168 sectors, 465.8 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): C0ADB511-F73D-404A-B128-DD01509AE6EA
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 976773134
Partitions will be aligned on 8-sector boundaries
Total free space is 262150 sectors (128.0MiB)
Number Start (sector) End (sector) Size Code Name [Additional Info]
1 * * 200.0MiB EF00 EFI System Partition rEFInd currently installed here, mounts to /boot/efi
2 * * 185.8GiB AF00 OSX
3 * * 619.9MiB AB00 Recovery HD
4 * * 93.1GiB AF00 DMZ unjouranaled HFS+ shared partition
5 * * 4.0GiB 8200 Arch Swap
6 * * 128.0MiB 8300 Arch Boot ext2
7 * * 50.0GiB 8300 Arch Root ext4
8 * * 131.8GiB 8300 Arch Home ext4
And my fstab, made with genfstab after I mounted everything (except for the swap stanza, which I had to write):
# /etc/fstab: static file system information
# <file system> <dir> <type> <options> <dump> <pass>
# UUID=2b121a89-aeb9-430a-8e6c-a05b79f08427
/dev/sda7 / ext4 rw,relatime,data=ordered 0 1
# UUID=efb41f69-6f99-4c8b-8431-01f3cd22c9cc
/dev/sda6 /boot ext2 rw,relatime 0 2
# UUID=67E3-17ED LABEL=EFI
/dev/sda1 /boot/efi vfat rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed, errors=remount-ro 0 2
# UUID=[another long UUID]
/dev/sda8 /home ext4 rw,relatime,data=ordered 0 2
# UUID=[another long UUID] LABEL=DMZ
/dev/sda4 /dmz hfsplus rw,relatime,unmask=22,uid=0,gid=0,nls=utf8 0 0
# UUID=[another long UUID]
/dev/sda5 swap swap defaults 0 0
Last edited by rjmh (2014-04-04 08:35:20)

henriqueleng wrote:
I don't know about Mac computers but i use a uefi motehrboard,
To install it i created a partition with 512MB and i mounted /boot on there. all the rest of system are normal.
I use gummiboot, i don't know if its stuff on Mac. I think that ou should try another bootloader!
And why do you mounted two point on /boot?
/boot and /boot/efi?
Are you sure you're using uefi, my fstab looks just like his with the boot and efi partition. I'm pretty sure that's how the wiki says to set it up. That's the fstab for a laptop with uefi if it helps you out. I had problems with grub btw, so I had to set up gummiboot
# /etc/fstab: static file system information
# <file system> <dir> <type> <options> <dump> <pass>
# /dev/sdb3
UUID=0c1c97a3-0472-4141-a756-a03c00a4a3cf / ext4 rw,relatime,data=ordered,discard 0 1
# /dev/sda3
UUID=8a4412fa-5d4b-4de4-91ff-a4d05b3705e1 /home ext4 rw,relatime,data=ordered 0 2
# /dev/sdb2
UUID=971ed3e8-394d-46b3-b0d4-e8bb86b267cf /boot ext4 rw,relatime,data=ordered,discard 0 2
# /dev/sdb1
UUID=095C-CB43 /boot/efi vfat rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro 0 2
# /dev/sda1
UUID=12a4a2b1-6338-495a-8a41-474653eb227b /var ext4 rw,relatime,data=ordered 0 2
# /dev/sda2
UUID=846803f1-3f5b-48ae-9945-37e9725011b2 none swap defaults 0 0

Problem booting Power Mac G4 DA

Hello,
Have a G4 PowerMac (DigitalAudio) and can't get it to boot. Here are the specs: G4,1.5Ghz,1GB RAM, MacOS 10.5.4, Superdrive, 6 HD's - 150GB(main),2 IDE 500GB+1 150BG on IDE card,2 SATA 160GB in IDE card, USB&Firewire expansion cards & ATI video card. All was working fine until after a power failure. Started not showing video;replaced the card but the problem is still there. Tested the monitor and cables with another computer and all is OK. Finally showed video, but then a message showed indicating I have to trun the computer off or restart (in gray screen after the wheel spiined for a few seconds. Stopped showing video again & the power button blinked 3 times. Went back to turning on with the restart message in the gray screen, but now shuts the computer off automatically. Flashed the PRAM and did a hard reset, re-started with the install discs and still the same problem. Any ideas? Thanks in advance.

Tried a new battery? Old Macs respond in all sorts of unexpected ways when the batteries are getting low. The power outage may have forced your computer to use the battery and pushed it over the edge.
If you have a digital multimeter you can check the condition of your present battery. It should read at least 3.2V if it is the 3.6V half-AA battery type. Ideally this should be measured while the battery is under load; added recommendation from Hans777:
I have recently found out that an exhausted battery will still indicate >3.6 V with a high internal resistance VM.
Checking incircuit: powercord disconnected press PMU reset button for >about 5 sec before measuring.
Checking outside: load the battery with a 1500 Ohm resistor when measuring.

Problem booting up from the CD for Mac OS Version 10.6.2

Hello everyone,
I have a 27" iMAC which I have been using for awhile. A few months back, I managed to set up Boot Camp successfully on the iMAC and been using the Windows OS for that period. Whenever I turn on the computer, I will definitely hit Alt/Option key, type in the password and select the Windows Hard Disk to boot up in. I'm finally done with my personal project and wanted to go back onto my Snow Leopard OS. Lo and Behold, whenever I select the Mac Hard Disk, the grey Apple logo with a loading sign appears and the problem is this screen is a permanent one. So I would like to seek your help in assisting me to solve this problem.
In addition, I tried inserting the CD and booting from the CD by pressing 'C' but I still get the grey apple and loading icon. I also tried restarting in safe mode(Hold down shift mode) but that didn't work either.
I will gladly provide any details if there is a need and also perform any actions that you recommend. Thank you everyone for your help.

Sorry if this is a shameless bump but are there any kind souls around?

Problem booting from external DVD drive on Lenovo S10e

Hi,
I recently purchased a new Lenovo S10e ideapad, a few weeks prior to that I purchased an external DVD rewriter drive manufactured by LG, the drive works perfectly on every computer I try with the exception of the Lenovo ideapad S10e.
The thing is that the drive is being recognized and installed by the Windows XP Home Edition the S10e came with but when I try to boot a bootable CD using then drive on the S10e ideapad I almost alwasy fail to do so.
I set the S10e BIOS to have the USB CDROM as first boot device, in addition I used the F12 key to use the boot menu to choose the boot device, in 9 out 0f 10 atempts my external drive will not show in the boot menu and when choosing the enter setup option I see that the BIOS do not list it as the USB CDROM, instead it says "USB CDROM:" rather than have the drive name after it.
In the 1 time out of 10 it does work the BIOS seem to be identifying the drive and it shows in the boot menu, however I cannot work with it for a more than 1 minute without it stopped being recognized again.
The problem seems very strange to me as the drive works under the windows operating system and do not have any problem whatsoever on other computers, I have tested the external drive on my PC, another Mini Laptop from LG and a GIGABYTE Laptop (Normal one), all of which had no problems recognizing the external drive and booting from it.
I will really appreciate if I can get some help with the problem.
Thanks.

I've had a similar issue with X61 and the external DVD drive from Lenovo.
In my case, it was the power issue. On the back of the drive, there is a small table says that the drive needs a 3.0A 5V power input. One USB 2.0 port can only provide 0.5A. I don't know if the drive has any special, low power mode, but I suspect that even if it has, 0.5A is still not enough to fully power it. I've checked the current with the multimeter, and at peak times, the drive draws 550mA. Even then, it makes a stuttering sound for a few seconds, before finally spinning the DVD disk. I've also noticed that the DVD works most of the times when it's connected to the left USB port. That may be because of how the laptop's internal power circuicity is laid out (+separate USB host controller for each 'side' of the laptop). Another thing that seems to help is to disable all 5V driven devices that the laptop uses: the wifi card, bluetooth, any additional devices connected to the USB bus / to the ethernet port / SD card port (I'm not actually sure which of the devices are 5V and which are 3.3V, but the best option is to disable all of them), maybe even remove the battery (if it's charging). Finally, the DVD drive works better if the laptop was turned on and runnig for some time, rather than it being turned on "a minute before". Also, in the BIOS, there is a setting that changes the speed of the DVD drive, but switching it to "low" didn't seem to affect the external drive (at least not before Windows boots up).

Problem booting in OS X 10.3

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