It is currently Tue Oct 21, 2014 4:01 am

All times are UTC - 8 hours




Post new topic Reply to topic  [ 9 posts ] 
Author Message
 Post subject: LBAcache / STAK nest error
PostPosted: Wed Sep 22, 2010 1:06 am 
Offline

Joined: Wed Sep 30, 2009 4:28 pm
Posts: 12
I'm having a problem with UBCD running off an USB stick. It works fine on all the Desktops around, but on both the IBM/Lenovo T61 and X61 series the freedos disk fails in an interesting way. It displays funny messages like
"LBACACHE: in. STAK nest!? otherss=00d3"
whenever it tries to access C: (i.e. the USB drive).

As far as I can tell, this is a problem with LBACACHE, because if I use the "Clean Boot" entry I can access the USB stick (as C:) just fine.

Unfortunately even the "Ultra-Defensive" boot option doesn't have an option to skip LBACACHE, so I'm a bit lost on how to fix/workaround this problem.

Can anyone help?


Top
 Profile  
 
 Post subject: Re: LBAcache / STAK nest error
PostPosted: Mon Sep 27, 2010 6:36 am 
Offline

Joined: Wed Sep 30, 2009 4:28 pm
Posts: 12
OK. I managed to work around this problem.

Fixed ubcd/images/fdubcd.img.gz by
- gunzip the file
- loopback mount the floppy on linux
- delete BIN/lbacache.cab
- unmount
- re-gzip
- replace fsubcd.img.gz with the new version

The such patched ubcd now works fine on the formerly problematic laptops.

Having an option to disable lbacache in the next version would be a great idea.


Top
 Profile  
 
 Post subject: Re: LBAcache / STAK nest error
PostPosted: Thu Sep 30, 2010 9:54 pm 
Offline

Joined: Mon Feb 21, 2005 10:59 pm
Posts: 1294
I can't find a way to make lbacache selectable on bootup like cdrom or lfn, but I can make the ultra-defensive option launch without lbacache.

The problem is lbacache is located in bin, for which menus are not supported.


Top
 Profile  
 
 Post subject: Re: LBAcache / STAK nest error
PostPosted: Thu Sep 30, 2010 11:22 pm 
Offline

Joined: Fri Jan 11, 2008 2:52 pm
Posts: 1278
Is there a way to use detect a nolbacache parameter specified on the MEMDISK command line, whit mdiskchk.com, at that stage?

_________________
Download Ultimate Boot CD v5.0: http://www.ultimatebootcd.com/download.html
Use Parted Magic for handling all partitioning task: http://partedmagic.com/


Top
 Profile  
 
 Post subject: Re: LBAcache / STAK nest error
PostPosted: Mon Oct 18, 2010 5:12 pm 
Offline

Joined: Mon Feb 21, 2005 10:59 pm
Posts: 1294
Conceivably, since menu interaction is not involved, and mdiskchk.com is already available at that stage.

So what do you have in mind? For users to update the menus and add "nolbacache" to every "memdisk fdubcd" line? Might be more convenient to introduce a single flag in "/etc/global.set" on fdubcd.img instead.


Top
 Profile  
 
 Post subject: Re: LBAcache / STAK nest error
PostPosted: Mon Oct 18, 2010 11:52 pm 
Offline

Joined: Fri Jan 11, 2008 2:52 pm
Posts: 1278
Because it only fails on a very few models, I think a "nolbacache" MEMDISK parameter would be better. Or, if possible, let the "nolbacache" MEMDISK parameter, change the "/etc/global.set" file, from:
Code:
nolbacache=0

to:
Code:
nolbacache=1

So you can provide the "nolbacache" MEMDISK parameter or you can change the "/etc/global.set" file.

_________________
Download Ultimate Boot CD v5.0: http://www.ultimatebootcd.com/download.html
Use Parted Magic for handling all partitioning task: http://partedmagic.com/


Top
 Profile  
 
 Post subject: Re: LBAcache / STAK nest error
PostPosted: Thu Oct 28, 2010 8:31 pm 
Offline

Joined: Mon Feb 21, 2005 10:59 pm
Posts: 1294
@Icecube: The proper place to add the default "0" value for "nolbacache" is config.sys (global.set is more for default menu settings), which I have done. Specifying "nolbacache" in memdisk sets it to 1, which disables loading of LBACACHE.

Feel free to try the new fdubcd.img here or here.


Top
 Profile  
 
 Post subject: Re: LBAcache / STAK nest error
PostPosted: Sun Nov 07, 2010 5:40 am 
Offline

Joined: Sun Nov 07, 2010 5:06 am
Posts: 3
Hello, I get the same error... could you fix the link? Thanks!

Victor Chew wrote:
Feel free to try the new fdubcd.img


Top
 Profile  
 
 Post subject: Re: LBAcache / STAK nest error
PostPosted: Mon Nov 08, 2010 9:46 pm 
Offline

Joined: Mon Feb 21, 2005 10:59 pm
Posts: 1294
Added link to a local copy. Please try again.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 

All times are UTC - 8 hours


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

Protected by Anti-Spam ACP Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group