257 replies to this topic

[steve6375]

Just curious: I wonder if Grub4Dos will be designed to use multiple CPUs/cores in the near future...

Why would you need more CPU power for grub4dos? Are you writing a code cracking algorithm in a grub4dos batch file?

[DavidB]

Why would you need more CPU power for grub4dos? Are you writing a code cracking algorithm in a grub4dos batch file?

 

No.

But in some situations more CPU power will speed up the booting a bit.

[Wonko the Sane]

No.

But in some situations more CPU power will speed up the booting a bit.

Really?

In the grub4dos part of the booting?

How many nanoseconds do you expect to gain by running a STRICTLY SEQUENTIAL set of instructions (like booting is) on multiple cores?

 

Wonko

[DavidB]

Hi, Wonko
Good to see you again.

I'm not sure, 3 or 4 nanoseconds

When I was speaking of "boot time" I meant the hole "process" (so loading/processing of grub4dos scripts as well). Sorry for not being more specific about that. Thank you for showing me this
Most of the time is wasted when reading from media (HDD, USB, CDROM and so on). But in some situations a parallel processing of the code from the scripts would help.

[Wonko the Sane]

No.

But in some situations more CPU power will speed up the booting a bit.

 

 

Hi, Wonko
Good to see you again.

I'm not sure, 3 or 4 nanoseconds

When I was speaking of "boot time" I meant the hole "process" (so loading/processing of grub4dos scripts as well). Sorry for not being more specific about that. Thank you for showing me this
Most of the time is wasted when reading from media (HDD, USB, CDROM and so on). But in some situations a parallel processing of the code from the scripts would help.

 

Care to share with us WHICH situations?

 

Wonko

[DavidB]

Okey dokey

For example when you have to process some configuration/boot files from an OS, so you could find HOW to start it.
You load the files in memory and start searching in them. You have some idea about how the required data might look but can't be 100% sure about its exact format and about its location (for good reasons).
This takes some CPU time. Not a lot when you compare it with the time wasted to load the files in memory but it counts.

[Wonko the Sane]

And again instead of a vague example, if you could provide a specific one that would probably help.

 

If you are doing the whatever processing through grub4dos batches, long before abusing of multi-core CPU's you will have a measurable increase of performance by writing a grub4dos (compiled) program.

 

Still, if the "general idea" is "going through a lot of files to find something" the process tends to be single threaded as long as the "area" to search is a single one (I presume the boot device) and the advantage might be when there are several areas to look into (let's say one thread for floppy devices, one thread for hard disk like devices and one thread for optical devices, roughly corresponding to the (fd) (hd) and (cd) devices in grub4dos).

 

All in all (and with all due and even some undue  respect) something that I would put on number #12478 on the priority list of future desired grub4dos enhancements (right before #12479 which is "Interfacing with an external controller capable of dispensing aromas and oils to the effect of holistically completing the grub4dos booting experience, providing means for integration into a wider therapeutic context suitable to allergy suffering users")   .

 

 

Wonko

[memoarfaa]

Can you be more precise? Do you mean RouterOS? Which version? What CPU? etc.

 

Hi steve6375

Yes i mean RouterOS

version 2.9.27

this is link to ISO

http://www.gulfup.com/?scVlbl

 

I try this commands in menu.lst 

 

1- map (0xff) 

 

 

find --set-root  /ISO/Mikrotik.iso

map /ISO/Mikrotik.iso (0xff)

map --hook

chainloader (0xff)

 

2- memdisk

 

kernel  /ISO/memdisk iso
initrd  /ISO/Mikrotik.iso

 

3- extract ISO content 

 

all of them boot Mikrotik setup correctly 

 

then i get no packed found 

[steve6375]

..(ignore)

[memoarfaa]

I don't understand

what is the exactly  meaning of ..(ignore)

[steve6375]

ignore = do not pay any attention to this post - i.e. I posted by mistake!

[steve6375]

MicroTik Router OS is listed here as one of the ISOs that does not work if booting from USB. It is hard coded to look for a CD-ROM hardware device.

[memoarfaa]

yes I see it before but

when i download It

I see that there is .mnu to support the iso 

Edited by memoarfaa, 09 July 2014 - 03:00 PM.

[steve6375]

where?

[cdob]

HP/Micron sp69130.exe writes GRUB4DOS 0.4.4 2009-03-31 grldr and grldr.mbr to hard disk. And creates a menu.lst
grldr.mbr is added to \boot\bcd and executed at next boot.
http://h20566.www2.h...mId=ob_139121_1
 

timeout 0
title MicronSSD Firmware Update (ISO)\nMicronSSD firmware update via ISO.
find --set-root /realssd.iso
map --mem /realssd.iso (0xff)
map --hook
chainloader (0xff)

[carfan]

I am trying to boot to Bitedender-rescue-cd.iso the is on the root of my usb drive. I have made the following boot string to my menu.lst. It boots all of the way to the splash screen then askes for the path to /rescue/livecdsquashfs.

I need to add a boot loop to point back to this file. Can anyone help me?

 

Thanks

Carfan

 

title Boot from Bitdefender Recsue CD
find --set-root /bitdefender.iso
map --heads=0 --sectors-per-track=0 /bitdefender.iso (hd32)
map --hook
root (hd32)
chainloader (hd32)
loopback loop /bitfefender.iso
/rescue/livecd.squashfs isoloop=/bitdefender.iso
 

[Wonko the Sane]

See:
http://reboot.pro/to...om-usb-mystery/


Wonko

[steve6375]

Also http://www.rmprepusb...-as-an-iso-file

[alacran]

Is it possible to boot clonezilla-live-20150805-vivid-amd64.iso or clonezilla-live-20150805-vivid-i386.iso from a partition in HDD using grubfordos?

 

alacran

[Motasem]

Is it possible to boot clonezilla-live-20150805-vivid-amd64.iso or clonezilla-live-20150805-vivid-i386.iso from a partition in HDD using grubfordos?

 

alacran

yes

[alacran]

yes

 

Good, Can you post the required config to put in menu.lst?

I tried this:

title Boot clonezilla-live-20150805-vivid-amd64.iso\nRun clonezilla-live-20150805-vivid-amd64.iso from HDD
##ISO file must be contiguous on disk in this case, use Wincontig
find --set-root /Isos
map /Isos/clonezilla-live-20150805-vivid-amd64.iso (0xFF)
map --hook
chainloader (0xFF)

title Boot clonezilla-live-20150805-vivid-amd64.iso\nRun clonezilla-live-20150805-vivid-amd64.iso in RAM
find --set-root /Isos
map --mem /Isos/clonezilla-live-20150805-vivid-amd64.iso (0xFF)
map --hook
chainloader (0xFF)
 

Both ways I can see the first screen, then selecting any option it does not go after first line.

 

alacran

[steve6375]

re. Clonezilla booting

Lots of examples of booting ISOs using grub4dos at www.rmprepusb.com

Or just use Easy2Boot or WinSetupFromUSB.

 

re. GRUB4DOS

1. Yes, name is a bit outdated, but at least it is consistent!

2. It can only be MBR-booted (like syslinux) but that doesn't mean you cannot UEFI-boot (see Easy2Boot)

3. There are front-end GUIs such as Easy2Boot (just drag-and-drop), WinSetupFromUSB, XBOOT, etc.

[ady]

2. It can only be MBR-booted (like syslinux)

FWIW, (I'm not sure what you meant, but) Syslinux has "gptmbr.bin", so it _can_ be used in BIOS systems with GPT, and there is syslinux.efi for UEFI systems (with GPT too).

Sorry for the OT.

[crashnburn]

re. Clonezilla booting

Lots of examples of booting ISOs using grub4dos at www.rmprepusb.com

Or just use Easy2Boot or WinSetupFromUSB.

 

re. GRUB4DOS

1. Yes, name is a bit outdated, but at least it is consistent!

2. It can only be MBR-booted (like syslinux) but that doesn't mean you cannot UEFI-boot (see Easy2Boot)

3. There are front-end GUIs such as Easy2Boot (just drag-and-drop), WinSetupFromUSB, XBOOT, etc.

 

Would love to have some of your thoughts here  

 

http://reboot.pro/to...ay/#entry195299