Créer une clé bootable

[Hydros]

Bonjour,

Je viens de télécharger Framakey Salix et lorsque j’exécute le script install-on-USB.cmd, il me retourne le message d'erreur suivant :

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Checking for GRUB2 files...
Checking for post-MBR gap...
Error: the post MBR gap is missing or not large enough [63 sectors].
  Yours appears to be of -1071600515 sectors.
Suggestion: slightly move the first partition \\.\PHYSICALDRIVE2\Part
each the gap size.
Appuyez sur une touche pour continuer...

Pour moi, c'est du chinois

Help please

[Shador]

First of all it would be nice if you had created that post in the French section of the board or were writing in English. J'éspère que tu comprend l'anglais, pars que mon francais ne suffit pas pour expliquer ce problem et c'est la section anglais tout de même.

The problem is that the partitioning of your system is not compatible with the bootloader. Therefor it's impossible to install it just like that. (Future versions work around this issue which has other downsides though and doesn't help in your case.) Still the gap size you're getting seems a bit weird so it might be something else.

First of all what kind of media are you trying to install to? Can you post the output of this command:

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LANG=C fdisk -l /dev/sdXY

Replace XY with the right values for your drive.

[mimosa]

You could try reformatting the USB stick you are trying to install to. Back up any data first.

[Shador]

You could try reformatting the USB stick you are trying to install to. Back up any data first.

First of all reformatting doesn't help here. Most most likely at least. Furthermore I would have suggested already a solution, but I don't know what we have here and I think shooting in the dark is dangerous. Especially when talking about filesystems and partition tables.

[Hydros]

First of all it would be nice if you had created that post in the French section of the board or were writing in English.

Sorry, it's my first post in this forum

First of all what kind of media are you trying to install to? Can you post the output of this command:

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LANG=C fdisk -l /dev/sdXY

I try to install salix-live in a usb stick.
The output of this command :

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me@mycomputer:~$ LANG=C fdisk -l /media/SanDisk
last_lba(): I don't know how to handle files with mode 40700

There are no files in /dev/sd00 but the stick is in /media (automount).
I have ubuntu and widows.

When i execute the script whith ubuntu, the console return :

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me@MyComputer:/media/SanDisk/boot$ sudo bash install-on-usb.sh
Error: the post MBR gap is missing or not large enough (63 sectors).
  Yours appears to be of  sectors.
Suggestion: slightly move the first partition (/dev/sd1) to reach the gap size.

Is there an error when the usb is mounted ?

[Shador]

First of all what kind of media are you trying to install to? Can you post the output of this command:

Code: Select all

LANG=C fdisk -l /dev/sdXY

I try to install salix-live in a usb stick.
The output of this command :

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me@mycomputer:~$ LANG=C fdisk -l /media/SanDisk
last_lba(): I don't know how to handle files with mode 40700

There are no files in /dev/sd00 but the stick is in /media (automount).
I have ubuntu and widows.

That's wrong. You need to pass the device not the mountpoint, e.g. /dev/sda1 (but that's probably not the right one in your case). Check the output of mount to find out what device is mounted on /media/SanDisk.
You get something like this:

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$ mount
/dev/root on / type ext4 (rw,noatime,barrier=1,data=ordered)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
/dev/sda6 on /home type ext4 (rw)
...

whereas the last line indicates that /dev/sda6 is mounted on /home. In your case it would have to look something like this:

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/dev/sdb1 on /media/SanDisk type ext4 (rw)

When i execute the script whith ubuntu, the console return :

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me@MyComputer:/media/SanDisk/boot$ sudo bash install-on-usb.sh
Error: the post MBR gap is missing or not large enough (63 sectors).
  Yours appears to be of  sectors.
Suggestion: slightly move the first partition (/dev/sd1) to reach the gap size.

Is there an error when the usb is mounted ?

No.

[Hydros]

Ahh, I just understand ...

You forgot sudo !!
The command returns :

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~$ sudo LANG=C fdisk -l /dev/sdc1

Disk /dev/sdc1: 16.0 GB, 16007561216 bytes
64 têtes, 32 secteurs/piste, 15266 cylindres, total 31264768 secteurs
Unités = secteurs de 1 * 512 = 512 octets
Taille de secteur (logique / physique) : 512 octets / 512 octets
taille d'E/S (minimale / optimale) : 512 octets / 512 octets
Identifiant de disque : 0x00000000

Périphérique Amorce  Début        Fin      Blocs     Id  Système

(sorry, it's in french )

[Shador]

You forgot sudo !!

No, I didn't. There are various ways to run commands as root and sudo is definitely not a way that always works.

(sorry, it's in french )

Yes, that's exactly what the LANG=C is meant to avoid, but probably the use of sudo which I didn't intend broke it.
Try running:

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$ sudo /bin/sh
# LANG=C fdisk -l /dev/sdc1
# LANG=C parted /dev/sdc1 print

That should give me english output as I intended. Also is there really no other line after the last line you posted?

[Hydros]

I reformat my usb-stick and re-copy files. The boot works therefor the subject is solved.

I didn't wanted to do that but it's easier.

I had already made an ubuntu boot in this usb-stick ; i suppose that the salix boot can't support this one (i didn't uninstall it because i don't know how do it)

Thank you very much for your help !

[JRD]

It should have been

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$ sudo /bin/sh
# LANG=C fdisk -l /dev/sdc
# LANG=C parted /dev/sdc print

Well, apparently the USB disk did not respect the regular gap for msdos partition type. The system seems to have difficulties in compute the correct position, but a full format (means recreating the MBR and partitions and using the regular msdos partition type with the 63 sectors gap) should solve it...and it seems it did.