sd4l-user

[SD4L-user] Cannot mount containers in Ubuntu 8.04

[Jonathan C. <jco...@ro...>]

When I try to mount a Scramdisk container, I get the error message 
"Mounting failed: No such device or address."

This is after I updated my Ubuntu v7.10 system to the v8.04 LTS release 
and installed ScramDisk_1.3-0_Ubuntu-8.04_2.6.24_i386.deb. I have 
successfully used Scramdisk on Ubuntu since version 7.04.

No information is given about the which device or address has a problem, 
but /var/log/messages includes the entry: " kernel: [   39.530073] 
scramdisk: disagrees about version of symbol struct_module".

Possibly this is a bug in the Debian package. If not, what is the solution?

Thanks.

Re: [SD4L-user] Cannot mount containers in Ubuntu 8.04

[Hans-Ulrich J. <han...@t-...>]

Hello Jonathan,

Jonathan Coles wrote:
> When I try to mount a Scramdisk container, I get the error message 
> "Mounting failed: No such device or address."
> 
> This is after I updated my Ubuntu v7.10 system to the v8.04 LTS release 
> and installed ScramDisk_1.3-0_Ubuntu-8.04_2.6.24_i386.deb. I have 
> successfully used Scramdisk on Ubuntu since version 7.04.
> 
> No information is given about the which device or address has a problem, 
> but /var/log/messages includes the entry: " kernel: [   39.530073] 
> scramdisk: disagrees about version of symbol struct_module".
> 
> Possibly this is a bug in the Debian package. If not, what is the solution?
> 
> Thanks.
> 

the problem is that the kernel on your system is slightly different
from the kernel on which I built the package. This might come from
a different Ubuntu distribution (KUbuntu, XUbuntu etc.) or from an
updated kernel. The kernel on which I built the package is
2.6.24-16-generic which was in the plain Ubuntu I installed shortly
after the launch. You can find out your kernel version by starting
a terminal and typing

uname -r

or by looking at the files in your /boot directory. If you can
tell me the exact version of your kernel I'll see whether I can
get that kernel and build a new package which should match your
kernel.

An alternative would be to build ScramDisk-1.3 yourself from the
sources. But you have to install many development tools in order to
do so. There is some guidance for that in the ScramDisk documentation
and I offer my support if you choose this option.

Best regards
Ulrich

Re: [SD4L-user] Cannot mount containers in Ubuntu 8.04

[Jonathan C. <jco...@ro...>]

Hello, Hans,

Fortunately, I have kernel 2.6.24-16 available, so I now boot from that. 
The also upgrade included 2.6.24-18, which was the default. I didn't 
realize that ScramDisk had to match the kernel that exactly. ScramDisk 
works fine now.

Thanks.


Hans-Ulrich Juettner wrote:
> Hello Jonathan,
>
> Jonathan Coles wrote:
>   
>> When I try to mount a Scramdisk container, I get the error message 
>> "Mounting failed: No such device or address."
>>
>> This is after I updated my Ubuntu v7.10 system to the v8.04 LTS release 
>> and installed ScramDisk_1.3-0_Ubuntu-8.04_2.6.24_i386.deb. I have 
>> successfully used Scramdisk on Ubuntu since version 7.04.
>>
>> No information is given about the which device or address has a problem, 
>> but /var/log/messages includes the entry: " kernel: [   39.530073] 
>> scramdisk: disagrees about version of symbol struct_module".
>>
>> Possibly this is a bug in the Debian package. If not, what is the solution?
>>
>> Thanks.
>>
>>     
>
> the problem is that the kernel on your system is slightly different
> from the kernel on which I built the package. This might come from
> a different Ubuntu distribution (KUbuntu, XUbuntu etc.) or from an
> updated kernel. The kernel on which I built the package is
> 2.6.24-16-generic which was in the plain Ubuntu I installed shortly
> after the launch. You can find out your kernel version by starting
> a terminal and typing
>
> uname -r
>
> or by looking at the files in your /boot directory. If you can
> tell me the exact version of your kernel I'll see whether I can
> get that kernel and build a new package which should match your
> kernel.
>
> An alternative would be to build ScramDisk-1.3 yourself from the
> sources. But you have to install many development tools in order to
> do so. There is some guidance for that in the ScramDisk documentation
> and I offer my support if you choose this option.
>
> Best regards
> Ulrich
>
> -------------------------------------------------------------------------
> Check out the new SourceForge.net Marketplace.
> It's the best place to buy or sell services for
> just about anything Open Source.
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> _______________________________________________
> SD4L-user mailing list
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> https://lists.sourceforge.net/lists/listinfo/sd4l-user
>
>   

Re: [SD4L-user] [I] Re: Cannot mount containers in Ubuntu 8.04

[Millen, S. <smm...@ea...>]

> the problem is that the kernel on your system is slightly different
> from the kernel on which I built the package. This might come from
> a different Ubuntu distribution (KUbuntu, XUbuntu etc.) or from an
> updated kernel. The kernel on which I built the package is
> 2.6.24-16-generic which was in the plain Ubuntu I installed shortly
> after the launch. You can find out your kernel version by starting
> a terminal and typing
>
> uname -r
>
> or by looking at the files in your /boot directory. If you can
> tell me the exact version of your kernel I'll see whether I can
> get that kernel and build a new package which should match your
> kernel.
>
> An alternative would be to build ScramDisk-1.3 yourself from the
> sources. But you have to install many development tools in order to
> do so. There is some guidance for that in the ScramDisk documentation
> and I offer my support if you choose this option.

I have just ordered a new box with Hardy installed, due here in a
few days, and I don't know what kernel version that I'll get (I've
sent an email asking). If Hardy is now being shipped with 
2.6.24-18-generic as default, wouldn't a package be needed?

(Looking at the Ubuntu forums, this updated kernel broke not only 
Scramdisk, but some other apps/features as well. Some rolled back 
to 2.6.24-16-generic to fix it). 

Sorry for the newbie question, but if I do get a install with 
2.6.24-18-generic installed, can I roll back to 2.6.24-16 to get 
Scramdisk to work until a compatible package is developed?

Stewart

Re: [SD4L-user] [I] Re: Cannot mount containers in Ubuntu 8.04

[Hans-Ulrich J. <han...@t-...>]

Hello Stewart,

Millen, Stewart wrote:
> I have just ordered a new box with Hardy installed, due here in a
> few days, and I don't know what kernel version that I'll get (I've
> sent an email asking). If Hardy is now being shipped with 
> 2.6.24-18-generic as default, wouldn't a package be needed?
> 
> (Looking at the Ubuntu forums, this updated kernel broke not only 
> Scramdisk, but some other apps/features as well. Some rolled back 
> to 2.6.24-16-generic to fix it). 
> 
> Sorry for the newbie question, but if I do get a install with 
> 2.6.24-18-generic installed, can I roll back to 2.6.24-16 to get 
> Scramdisk to work until a compatible package is developed?
> 

I don't know how the vendor of the new box installs the machines,
but if it's only updated from an original installation with
kernel 2.6.24-16-generic (or an image of such a state) the roll
back is easy. The old kernel package is'nt removed on update but
the new package is merely added and made the default for booting.
You may choose the old kernel on every boot by hand.

You can change this default by editing the file /boot/grub/menu.lst
(there is certainly a GUI in Ubuntu for this purpose but I don't
know it from the top of my head - I always edit this by hand).

Best regards
Ulrich

Re: [SD4L-user] [I] Re: Cannot mount containers in Ubuntu 8.04

[Millen, S. <smm...@ea...>]

Hi Hans-Ulrich,

Millen, Stewart wrote:

>> Sorry for the newbie question, but if I do get a install with 
>> 2.6.24-18-generic installed, can I roll back to 2.6.24-16 to get 
>> Scramdisk to work until a compatible package is developed?
>> 
>
> I don't know how the vendor of the new box installs the machines,
> but if it's only updated from an original installation with
> kernel 2.6.24-16-generic (or an image of such a state) the roll
> back is easy. The old kernel package is'nt removed on update but
> the new package is merely added and made the default for booting.
> You may choose the old kernel on every boot by hand.
>
> You can change this default by editing the file /boot/grub/menu.lst
> (there is certainly a GUI in Ubuntu for this purpose but I don't
> know it from the top of my head - I always edit this by hand).

I just got the email back from the vendor: my box has both kernels 
installed, so I'll just roll back. I've done some searching on the 
web in the meantime, and it seems all one has to do is to change 
the defaults is to edit the file /boot/grub/menu.1st and select the
line:

default 0

and change "0" to the number corresponding to 2.6.24-16 (the non-
safe mode version) in the list of kernels. Correct?

I did read on the Ubuntu forums that by a poster's performance 
tests, 2.6.24-18 does run significantly faster. So perhaps a 
package compatible with it might be desirable. Or at least
downloaders of SD4L should be warned that they will need to choose
to boot to the earlier kernel to save themselves (and you!) the
hassle of re-answering this question. =)

Stewart 

Re: [SD4L-user] [I] Re: Cannot mount containers in Ubuntu 8.04

[Hans-Ulrich J. <han...@t-...>]

Hi all,

Millen, Stewart wrote:
> I did read on the Ubuntu forums that by a poster's performance 
> tests, 2.6.24-18 does run significantly faster. So perhaps a 
> package compatible with it might be desirable. Or at least
> downloaders of SD4L should be warned that they will need to choose
> to boot to the earlier kernel to save themselves (and you!) the
> hassle of re-answering this question. =)

New packages for Ubuntu 8.04 and kernel 2.6.24-18 have been
uploaded to the SD4L release 1.3.0 for architectures i386
and x86_64.

Best regards
Ulrich

Re: [SD4L-user] [I] Re: Cannot mount containers in Ubuntu 8.04

[Jonathan C. <jco...@ro...>]

I have just tried kernel 2.6.24-19. Scramdisk built for 2.6.24-18 still
works.

Hans-Ulrich Juettner wrote:
> Hi all,
>
> Millen, Stewart wrote:
>   
>> I did read on the Ubuntu forums that by a poster's performance 
>> tests, 2.6.24-18 does run significantly faster. So perhaps a 
>> package compatible with it might be desirable. Or at least
>> downloaders of SD4L should be warned that they will need to choose
>> to boot to the earlier kernel to save themselves (and you!) the
>> hassle of re-answering this question. =)
>>     
>
> New packages for Ubuntu 8.04 and kernel 2.6.24-18 have been
> uploaded to the SD4L release 1.3.0 for architectures i386
> and x86_64.
>
> Best regards
> Ulrich
>
>
> -------------------------------------------------------------------------
> Check out the new SourceForge.net Marketplace.
> It's the best place to buy or sell services for
> just about anything Open Source.
> http://sourceforge.net/services/buy/index.php
> _______________________________________________
> SD4L-user mailing list
> SD4...@li...
> https://lists.sourceforge.net/lists/listinfo/sd4l-user
>
>