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 Bootable ImDisk
post Mar 14 2009, 09:29 PM
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Hoppertje
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@ Olof Lagerkvist - Keep up the great work! wink.gif

---

Q: Will it ever be possible to use ImDisk as bootable device?
(startup/run your full installation of XP/Vista/7 in RAM)
(it would be great to have something like diskless angel, for free tongue.gif)


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post Mar 15 2009, 08:57 AM
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mr_
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Currently ImDisk is a gui to map images under Windows to a drive letter. I think this is very unlikely as it would burst the current project.

The image booting theme is so complex that it deserves it's whole own project, you can look at grub4dos, it has some support for it, real mode only.

You can look at (1) and (2).

disklessangel is probable (2) for Windows.

There are 3 ways to implement a 32/64 bit compliant bootable image loader, an operating system dependant device driver, a non generic solution, the "easy" way (2) to implement that but so far no developer has taken the challange to programm it.

The second and most complicated way would be to implement a whole faked storage controller (VMware like appraoch at boottime).

And the third "medium" complicated to write a device driver which continues to use BIOS like Win9x did in compatiblity mode if no controller driver was found, if I understand right Universal ATA driver has this on his plans list but it's questionable if it get ever finished.
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post Mar 15 2009, 09:54 AM
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was_jaclaz
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QUOTE (Hoppertje @ Mar 14 2009, 11:29 PM) *
Q: Will it ever be possible to use ImDisk as bootable device?
(startup/run your full installation of XP/Vista/7 in RAM)
(it would be great to have something like diskless angel, for free tongue.gif)


NO. sad.gif

Read here:
http://www.911cd.net/forums//index.php?showtopic=19960
http://www.911cd.net/forums//index.php?showtopic=20846

QUOTE (mr_ @ Mar 15 2009, 10:57 AM) *
Currently ImDisk is a gui to map images under Windows to a drive letter.

NO. w00t.gif

Just for the record it is BOTH a command line app and a GUI app (managed through a Control Panel applet), and it is BOTH a Ramdisk and a File image disk driver.
http://www.911cd.net/forums//index.php?showtopic=19711



There is a thread where I list all known "Filedisk" and "Ramdisk" drivers:
http://www.boot-land.net/forums/index.php?showtopic=1507


There are a few new "kids on the block" in there, that noone seems interested in experimenting with. sad.gif

jaclaz


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post Mar 15 2009, 10:15 AM
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Hoppertje
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I'd like to thank you both for your replies smile.gif

@Jaclaz... I've read through your posts... you seemed positive... atleast in the beginning tongue.gif I guess all hope has abandoned us??


Now i did grew up with DOS... so i am a bit familiar with it... where does the problem lay??

Is it possible to create a large Ramdisk under DOS ?
and correct me if i am wrong, but by executing loader.exe under DOS, will that not loadup windows?
cant we restore an image with lets say ghost from ntfs to the ramdisk??

just a random thought, i guess you guys thinked things through of it all by now
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post Mar 15 2009, 10:44 AM
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was_jaclaz
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QUOTE (Hoppertje @ Mar 15 2009, 12:15 PM) *
@Jaclaz... I've read through your posts... you seemed positive... atleast in the beginning tongue.gif I guess all hope has abandoned us??

I am still positive. smile.gif
Simply IMDISK cannot do that. sad.gif

ANOTHER solution/driver has to be found. rolleyes.gif


QUOTE (Hoppertje @ Mar 15 2009, 12:15 PM) *
Now i did grew up with DOS... so i am a bit familiar with it... where does the problem lay??

Is it possible to create a large Ramdisk under DOS ?
and correct me if i am wrong, but by executing loader.exe under DOS, will that not loadup windows?
cant we restore an image with lets say ghost from ntfs to the ramdisk??


Lots of questions....w00t.gif
...actually some answers would be more welcome....happy22.gif

Some hints/ideas are given in this thread:
http://www.boot-land.net/forums/index.php?...ic=7425&hl=


QUOTE (Hoppertje @ Mar 15 2009, 12:15 PM) *
just a random thought, i guess you guys thinked things through of it all by now


Here you are possibly very, VERY wrong. wink.gif

Most if not all the new findings on these and other technical boards have often been originated by the curiosity, inventiveness or ingenuity of people that envisioned a "new" or "uncoventional" approach. smile.gif

So, don't stop thinking with your own mind, do not accept "on faith" what other people tell you, do your own experiments, talk about your ideas, something may come out of it, even from the smallest change of perspective I have seen GREAT new things develop.... thumbsup.gif

...but still, before that, do some searches, make sure you get the hang of the basics, verify and analyze previous reports/attempts....
remember:
QUOTE (thomas Alva Edison)
"Genius is 1% inspiration and 99% perspiration!"


cheers.gif

jaclaz


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post Mar 19 2009, 06:46 PM
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Hoppertje
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I did some reading about how windows starts up....

now correct me if i am wrong...
windows 95/98 by shell-executable command
windows xp/vista by mbr
windows 7 by shell-executable command...

if this is the case with windows 7, then we would only need a dos-ramdisk capable of ntfs formatting and norton ghost? or am i to optimistic now tongue.gif
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post Mar 20 2009, 12:22 AM
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was_jaclaz
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QUOTE (Hoppertje @ Mar 19 2009, 08:46 PM) *
now correct me if i am wrong...


Unfortunately you are wrong. sad.gif

But even more unfortunately you are so wrong that there is no way one can correct you. w00t.gif

These, no offence intended, mind you wink.gif are simply non-senses: hyper.gif

QUOTE (Hoppertje @ Mar 19 2009, 08:46 PM) *
windows 95/98 by shell-executable command
windows xp/vista by mbr
windows 7 by shell-executable command...


this appears as a random thought without head or tail:
QUOTE (Hoppertje @ Mar 19 2009, 08:46 PM) *
if this is the case with windows 7, then we would only need a dos-ramdisk capable of ntfs formatting and norton ghost?


QUOTE (Hoppertje @ Mar 19 2009, 08:46 PM) *
or am i to optimistic now

Yes you are, or to be more accurate, you simply don't know what you are talking about.

Really, WHERE did you read such things?

ANY OS is loaded with a sequence of:
MBR->BOOTSECTOR->Loader->Kernel

In the case of DOS win9x/Me loader AND kernel is IO.SYS
In the case of NT/2K/XP/2003 loader is NTLDR (which is in itself a pre-kernel) that later loads the kernel files (kernel is made by several files).
In the case of Vista OR Windows 7 (they are very, very similar) the loader is BOOTMGR (which in itself is a pre-kernel) that later loads the kernel files (kernel is made by several files).
In the case of Linux the loader can be several programs that later load the monolithic Linux kernel.

A dos ramdisk capable of NTFS formatting and norton GHOST is something that may be useful in DOS (if you have NTFS enabled DOS) and NOWHERE ELSE.

jaclaz



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post Jul 5 2009, 08:31 AM
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cdob
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@Olof

Can imdisk mount a grub4dos RAM loaded ISO image?

Example: XP installation
grub4dos load ISO image to RAM
boot ISO image
imdisk.sys is loaded at txtsetup.sif and maps the loaded ISO image to a CD-ROM drive

http://www.boot-land.net/forums/index.php?...amp;gopid=71093
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