Ram Disk

QNX Newsgroups (Archives) qdn.public.qnxrtp.os
1

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Hi,
Do you plan to supply a true Ram Disk (not a Flash filesystem), I think it doesn't exists!
shmem has too limited functionnalities.

Thanks,
Alain.

2

Hi Alain,

Please do a search on the QNX Knowledge Base

http://support.qnx.com/support/bok/

and do a search for “Ramdisk” with the OS field being “QNX4”

there is an entry called “Create a ramdisk in QNX4”.

Thanks

Erick.


Alain Bonnefoy <alain.bonnefoy@icbt.com> wrote:

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html
Hi,
br>Do you plan to supply a true Ram Disk (not a Flash filesystem), I think
it doesn’t exists!
br>shmem has too limited functionnalities.
p>Thanks,
br>Alain.</html

3

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Hardware Support Account a écrit :
Hi Alain,

Please do a search on the QNX Knowledge Base

http://support.qnx.com/support/bok/

and do a search for "Ramdisk" with the OS field being "QNX4"

there is an entry called "Create a ramdisk in QNX4".

Thanks

Erick.
 

Alain Bonnefoy <> wrote:
>
>
> Hi,
>
Do you plan to supply a true Ram Disk (not a Flash filesystem), I think
> it doesn't exists!
>
shmem has too limited functionnalities.
>

Thanks,
>
Alain.


Is it ok for qrtp?

Alain.
 
4

Hi Alain,

Sorry my appologies (thought this was the QNX4 forum). The utility
you use is devf-ram (it uses the flash filesystem code, but it is a ramdisk).

Erick.



Alain Bonnefoy <alain.bonnefoy@icbt.com> wrote:

!doctype html public “-//w3c//dtd html 4.0 transitional//en”
html
Hardware Support Account a écrit :
blockquote TYPE=CITE>Hi Alain,
p>Please do a search on the QNX Knowledge Base
p>http://support.qnx.com/support/bok/</a](http://support.qnx.com/support/bok/">http://support.qnx.com/support/bok/</a)
p>and do a search for “Ramdisk” with the OS field being “QNX4”
p>there is an entry called “Create a ramdisk in QNX4”.
p>Thanks
p>Erick.
br> 
p>Alain Bonnefoy <> alain.bonnefoy@icbt.com> > wrote:
br>> <!doctype html public “-//w3c//dtd html 4.0 transitional//en”
br>> > Hi,
br>>
Do you plan to supply a true Ram Disk (not a Flash filesystem),
I think
br>> it doesn’t exists!
br>>
shmem has too limited functionnalities.
br>>

Thanks,
br>>
Alain.</blockquote

p>
Is it ok for qrtp?
p>Alain.
br> </html

5

<!doctype html public “-//w3c//dtd html 4.0 transitional//en”>

Hardware Support Account a écrit :
Hi Alain,

Sorry my appologies (thought this was the QNX4 forum).  The utility
you use is devf-ram (it uses the flash filesystem code, but it is a ramdisk).

Erick.
 


Ok but according to the doc, I'm not sure that it works on RAM.

I tried, I got:
/dev/fs0        1,048,576 rw-r--r--
/dev/fs0p0    1,048,576 rw-r--r--

I tried to mount these points, but it doesn't work!
 

thanks,
Alain.
 
 

6

Hi Alain,

How do you start devf-ram? What parameters do you use?

Erick.


Alain Bonnefoy <alain.bonnefoy@icbt.com> wrote:

!doctype html public “-//w3c//dtd html 4.0 transitional//en”
html
Hardware Support Account a écrit :
blockquote TYPE=CITE>Hi Alain,
p>Sorry my appologies (thought this was the QNX4 forum).  The utility
br>you use is devf-ram (it uses the flash filesystem code, but it is a
ramdisk).
p>Erick.
br> </blockquote

p>
Ok but according to the doc, I’m not sure that it works on RAM.
p>I tried, I got:
br>/dev/fs0        1,048,576 rw-r–r–
br>/dev/fs0p0    1,048,576 rw-r–r–
p>I tried to mount these points, but it doesn’t work!
br> 
p>thanks,
br>Alain.
br> 
br> </html

7

<!doctype html public “-//w3c//dtd html 4.0 transitional//en”>

Hardware Support Account a écrit :
Hi Alain,

How do you start devf-ram?  What parameters do you use?

Erick.

Alain Bonnefoy <> wrote:
>
>
> Hardware Support Account a écrit :
>

Hi Alain,
>

Sorry my appologies (thought this was the QNX4 forum).  The utility
>
you use is devf-ram (it uses the flash filesystem code, but it is a
> ramdisk).
>

Erick.
>
 

>


Ok but according to the doc, I'm not sure that it works on RAM.
>

I tried, I got:
>
/dev/fs0        1,048,576 rw-r--r--
>
/dev/fs0p0    1,048,576 rw-r--r--
>

I tried to mount these points, but it doesn't work!
>
 
>

thanks,
>
Alain.
>
 
>
 


I forgot to use flashctl.

Thanks,
Alain.