usb iso does not work with dd command

elgrandeperro · 07-31-2022, 11:09 PM

How much memory do you have? You need 2G for 4M server edition to run the Live image.

!!! · 07-31-2022, 11:30 PM

I don't think #16 is relevant, because the OP uses other distros.

@#13 (MichaelK): I trust your huge experience/expertise, but I don't quite understand. Could you provide additional tutoring here? I did find this article: https://superuser.com/questions/6832...so-is-a-hybrid
This may have actually happened to me because I vaguely remember (rare) things mysteriously not booting in the past.

More: https://www.oreilly.com/library/view...1079fffd.xhtml
I did not know this!!! I guess I truly am a Linux N00b!!!

Edit added several days later: thanks for #19!!! I did some more web searching and found this, which seems to be a great tutorial:
https://www.rodsbooks.com/gdisk/hybrid.html

My favorite Hands-on Booting (one of the few books I own because I depend on my local public sclibrary.org) unfortunately makes no mention of even USB flash drive booting, only CD / DVD ( though it has a brief appendix on live isos which I think is a totally different issue)

0day · 08-01-2022, 05:29 AM

Quote:

Originally Posted by michaelk

Code:

file 4MLinux-40.0-64bit.iso
4MLinux-40.0-64bit.iso: ISO 9660 CD-ROM filesystem data 'CDROM' (bootable)

file hybrid.iso
hybrid.iso: ISO 9660 CD-ROM filesystem data (DOS/MBR boot sector) 'CDROM' (bootable)

I believe you but usually a hybrid ISO will have a DOS/MBR boot sector, a non-hybrid does not and a non-hybrid ISO should not be able to boot from USB.

thanks,
now it works with the hybrid iso but I saw that while using jwm it uses 1.8 gb of ram in live, sparkylinux 300/400 mb, crunchbang ++ also and mabox as well.

michaelk · 08-01-2022, 07:31 AM

!!!,
A CD/DVD boots using a completely different process from a regular hard drive which is why copying the ISO file using the dd command fails. An ISO file by convention is an ISO 9660 filesystem, the standard defines how data is written to the disk and how to make it bootable. One of the first methods to convert an ISO file to boot from USB was syslinux. The file was extracted to an existing USB drive formatted with a FAT32 filesystem and then syslinux was the boot loader. isohybrid adds a MBR to the ISO file when created which allows it to "natively" boot from a USB drive. Most distributions these days provide a hybrid ISO file which is why most people might expect using the dd command to just work. When booted the filesystem still appears like a read only CD/DVD despite it being on a flash drive.

I have not played with 4M much so I can not comment on memory. For specific questions use the 4Mlinux forum here:
https://www.linuxquestions.org/questions/4mlinux-115/.

elgrandeperro · 08-01-2022, 07:37 AM

I booted from Virtualbox, but the server image requires 2GB memory or it panics. The non server requires 1GB memory.

Sorry, I haven't seen a non hybrid live iso in a while.

fatmac · 08-01-2022, 12:05 PM

Quote:

Originally Posted by 0day

thanks,
now it works with the hybrid iso but I saw that while using jwm it uses 1.8 gb of ram in live......

It is probably loading the system to ram & running it from there.

zk1234 · 08-01-2022, 12:54 PM

Quote:

Originally Posted by fatmac

It is probably loading the system to ram & running it from there.

Yes, it is.

.

zk1234 · 08-01-2022, 01:02 PM

Quote:

Originally Posted by 0day

thanks,
now it works with the hybrid iso but I saw that while using jwm it uses 1.8 gb of ram in live, sparkylinux 300/400 mb, crunchbang ++ also and mabox as well.

When 4MLinux is installed to a HDD, RAM consumption is close to none. See:
http://4mlinux.com/index.php?page=download

You can also choose "Legacy Installer" from the hybrid.iso menu. This will make it possible for you to start the installation process even if you have only 128 MB of RAM.

.

0day · 08-02-2022, 02:23 PM

Quote:

Originally Posted by zk1234

When 4MLinux is installed to a HDD, RAM consumption is close to none. See:
http://4mlinux.com/index.php?page=download

You can also choose "Legacy Installer" from the hybrid.iso menu. This will make it possible for you to start the installation process even if you have only 128 MB of RAM.

.

tapping on touchpad does not work in 4mlinux

zk1234 · 08-02-2022, 03:34 PM

Perhaps you disabled it by mistake?
Menu > Settings > Devices > Touchpad On/off

Ps.
You should have been started a new thread.