Currently Being ModeratedRe: Bootable rescue USB from a running Mac OS X 10.6.x system for diskutil, dd, and maybe time machineFeb 6, 2013 3:49 AM (in response to m0xee)
Well you certainly "Think differently" to say the least after reading your post.
You really can't restore a corrupted OS X system and backups without a clean copy of the original OS on the disk.
10.5 isn't going to help you much, except to wipe a drive of all data as it's a older OS version.
All I can say is to run through these User Tips and call Apple to send you a 10.6 machine specific or 10.6.3 white retail disk (depends upon what OS X version came on your Mac) and proceed from that to recover your data and then rebuild your machines software on a new drive.
If you can't do it, then have a local Mac specialist do it all for you.
Currently Being ModeratedRe: Bootable rescue USB from a running Mac OS X 10.6.x system for diskutil, dd, and maybe time machineFeb 6, 2013 6:18 PM (in response to ds store)
Well that's a pity because with all the tools that any Mac OS X has, I'm surprised more people haven't done this already. It merely seems logical and not so "different" as you put it. I know how to do this on two other operating systems but not this one
Not challenging you on tech, but...
TRUE/FALSE: The Mac OS X on the MBP has the same startup software and utilities that's on the installation DVD, if not more. I'm not talking about the warm and fuzzy multi-language welcome screen. I'm talking merely about booting and some environment to interact with.
TRUE/FALSE: My file system is corrupted, but I'm writing to you from it as well. It does boot fine. It just has fs errors that make it difficult yet bypassable. Because of this, since I can get into a shell environment, I can get into diskutil and bless another volume/disk.
TRUE/FALSE: 10.5 actually could help me by setting my MBP in target disk mode and writing the startup disk off to an external TMBD, then restoring later.
BTW, where did the UNIX forum go? I can't find it
Currently Being ModeratedRe: Bootable rescue USB from a running Mac OS X 10.6.x system for diskutil, dd, and maybe time machineFeb 7, 2013 3:26 AM (in response to m0xee)
To restore a full installation from TM, you need an installer disc. It's possible to use a USB, but you need to install the OS on that from the disc in the first place (not necesarily on the same computer).
The USB would need to be a minimum of 8GB; the installation DVD is Dual Layer.
Your understanding of Time Machine seems to be greatly lacking.
View Pondid's excellent articles, especially on how TM works.
TM is not bootable, full stop.
Firewire Target Disc mode; no other firewire devices may be connected to either computer during this procedure. You can't run a TM backup remotely anyway, it has to be from a booted volume.
Currently Being Moderated
Hi there! I don't need all the tools and installation files of an installation DVD, so this is why I feel I can get away with a smaller bootable environment with just the basic diskutil, dd, and/or a time machine application. I think 4GB is reasonable, but 8GB would simply be the bloated installation DVD, which is nonsense.
Pondid's site seems impressive. Thanks for the link!
I'm aware that a TM backup is not bootable. However, AFAIK, it can restore an entire system from bare metal to a running system; boot.efi, etc. This is even confirmed from Pondid's website:
You can also recover your entire system (OSX, apps, settings, users, data, etc.) to the exact state it was in at the time of any backup, even it that's a previous version of OSX.
In FW target disk mode, I wasn't aware of the host computer not having any other FW devices attached. This doesn't sound right as the target computer is merely acting as a hard disk, and the host computer sees nothing else special about this as an "external hard disk." I'll need to confirm this. Regardless, my TMBD is a USB 2.0 disk, so I may be OK using his eMac for the operation. Just to clarify from OPTION 3, if I'm going to be using a 10.5 host computer for my target-disk-attached MBP, I'm only going to send an image of my MBP disk to my TMBD, NOT do a time machine restore. I actually have that much space on the TMBD to put a whole image of my MBP as well as the TM backups.
Thanks #2 for the UNIX forum link! I guess Apple nested it from its previous position. I hope this is not a sign of phasing the forum out!
I'll try to post back with my findings as I work them out, time permitting. Even if I solve this with the 10.5 eMac, I'm still interested in such a small USB rescue for future SNAFUs. This would really help travelers like myself! DVDs are delicate. I usually have DMG and ISO images of my disks on my MBP, but since I was running low on space, guess what was one of the first DMG to ditch? Yep, over 7GB freed space = two weeks of agony. Stoooopid!