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Re: SoftRAID 3.6.6 formated disk cannot boot Intel servers - only in my case??? (Thomas von Eyben



Thomas -

I believe your problem is that kextcache is getting confused about whether it needs to rebuild the Boot OSX volume in the AppleBoot partitions. This is a symptom of the way you are cloning your volume. The solution I have found in my testing is to call touch on the volume's extension folder before calling kextcache. Also note that you can't run kextcache on a Leopard volume if you are booted from a Tiger startup volume. The kextcache man page indicates that the -f option is supposed force the update. This doesn't actually happen in my hands (in 10.5.2).

So if you are trying to boot from a volume called "MyVolume", the following two commands should make it bootable:

sudo touch /Volumes/MyVolume/System/Library/Extensions
sudo kextcache -f -u /Volumes/MyVolume/SystemLibrary/Extensions

	Let me know if you need more help.

	Tim Standing
	SoftRAID, LLC


P. S.: I have been booting my main desktop (a Mac Pro) from a SoftRAID mirror for the past 5 months without a problem. I did however see the problem you described when cloning volumes in preparation for MacWorld in January. That is when I figured out the fix.


On Apr 23, 2008, at 12:26 PM, email@hidden wrote:

Hi there,


Short question:
Do you have a working setup with an intel server capable of booting off of a
SoftRAID formated disk?


Long description:
I am currently setting up a brand new 2.3 GHz Intel xserve with 10.5 server.


The server has three disk:
1. Three partitions (Boot live, Boot update test, Boot maintenance)
2. One partition (Apple Disk Utility made)  running 10.5.2 server
3. Not used now (to be second part of a mirror)

The server was originally installed on disk 2 and that is working as
expedted.

The plan is the to clone that OS to a SoftRAID created mirror (made of disk
1 & 3).


The problem is that I am not able to boot from my clone if the partition is
made with SoftRAID.


If I use SoftRAID to convert the cloned partition back to "Apple Disk
Utility Format" then it boots just fine, but as soon as I have converted
back to the SoftRAID format it's unbootable.


I have cloned using Disk Utility as well as CCC 3.1, (but this seems
irrelevant according to the above fact ;)


- I have tried to recreate the boot cache (even though SoftRAID does this as
part of the conversion process).
Doing this in the terminal reveals intersting debug information:


einstein:~ sysadmin$ sudo kextcache -f -v 3 -u /Volumes/Boot\ live
Password:
kextcache: /Volumes/Boot live: error getting description from Disk
Arbitration



- The volumes UUID are all different so that's not the problem


- The command "diskutil info /Volumes/Boot\ live" also describes the bootability as I experience it: Bootable: Not bootable, can be made bootable safely


- TvE

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