thank you for your answer..
I have problem with the identification of the hard drive that has the MBR .(I have to select one of those )
---------------------
---------------------
This information say me nothing about what is the HD with MBR..
Only from the command : sudo blkid/dev/sda1: LABEL="data_storing" UUID="080CD0150CCFFC1E" TYPE="ntfs" PARTUUID="2c5f2c5e-01"
/dev/sdb1: UUID="4b1e5e09-306b-4c17-8c2f-653b32e1b956" TYPE="ext4" PARTUUID="0008635c-01"
/dev/sdb2: UUID="Vtbdeq-eq6H-sbMY-Mpme-UyFk-jx77-I5Z20K" TYPE="LVM2_member" PARTUUID="0008635c-02"
/dev/sr0: UUID="2014-05-16-21-49-27-00" LABEL="ISOIMAGE" TYPE="iso9660" PTTYPE="dos"
/dev/sdc1: UUID="DE7CD8197CD7EA73" TYPE="ntfs" PARTUUID="f043f043-01"
/dev/sdc5: UUID="62F0169EF016790D" TYPE="ntfs" PARTUUID="f043f043-05"
/dev/mapper/fedora-swap: UUID="54d55595-8c35-4e84-8566-89d8b6f340e8" TYPE="swap"
/dev/mapper/fedora-root: UUID="2d224b16-d37f-4eee-820a-dfcd5929e05e" TYPE="ext4"
/dev/mapper/fedora-home: UUID="3c3f7a2e-82fa-4510-ac11-0c67fbbd85c0" TYPE="ext4"
---------------------
I am also not sure how to interpret these data in order to know the partition that have the MBR..
(perhaps is /dev/sdb1 ---- ???
because is the only partition with file system EXT4 ??? )
because is the only partition with file system EXT4 ??? )
In any case: ... how I can individuate the HD to start at boot, knowing the partition
????????????Thank you for any suggestion
On Thu, Nov 19, 2015 at 9:04 PM, stan <stanl-fedorauser@xxxxxxxxxxx> wrote:
On Thu, 19 Nov 2015 17:51:18 +0200
Angelo Moreschini <mrangelo.fedora@xxxxxxxxx> wrote:
> the command lsblk give me :
> [angelo_user@zorro ~]$ lsblk
> NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
> sda 8:0 0 465.8G 0 disk
> └─sda1 8:1 0 465.8G 0 part
> sdb 8:16 0 931.5G 0 disk
> ├─sdb1 8:17 0 500M 0 part /boot
> └─sdb2 8:18 0 931G 0 part
> ├─fedora-root 253:0 0 50G 0 lvm /
> ├─fedora-swap 253:1 0 3.9G 0 lvm [SWAP]
> └─fedora-home 253:2 0 877.1G 0 lvm /home
> sdc 8:32 0 465.8G 0 disk
> ├─sdc1 8:33 0 97.7G 0 part
> ├─sdc2 8:34 0 1K 0 part
> └─sdc5 8:37 0 368.1G 0 part
> sr0 11:0 1 12M 0
> rom /run/media/angelo_user/ISOIMAGE
>
>
> ----------
> I tried:
> ----------
> [angelo_user@zorro ~]$ *sudo grub2-install /dev/sdb1*
> /usr/sbin/grub2-bios-setup: warning: File system ‘ext2’ doesn't
> support embedding.
> /usr/sbin/grub2-bios-setup: warning: Embedding is not possible. GRUB
> can only be installed in this setup by using blocklists. However,
> blocklists are UNRELIABLE and their use is discouraged..
> /usr/sbin/grub2-bios-setup: error: will not proceed with blocklists.
> --------------------
> and also :
> [angelo_user@zorro ~]$ *sudo grub2-install /dev/sdb2*
> /usr/sbin/grub2-bios-setup: error: unable to identify a filesystem in
> hostdisk//dev/sdb; safety check can't be performed.
The MBR is for the disk, not the partition. So the above are incorrect.
>
>
>
> On Thu, Nov 19, 2015 at 5:38 PM, Angelo Moreschini <
> mrangelo.fedora@xxxxxxxxx> wrote:
>
> > Hj,
> >
> > I arranged differently the position of the HD(s) installed on my
> > computer and then, because this, Fedora didn't start regularly...
> > (at boot I got only the emergency prompt of GRUB).
> >
> >
> > I was able to start Fedora using the "disk GRUB 2 for recovery"..
> > I and after this tried to install grub back to the MBR..
> >
> >
> > I tried this operation using the command :
> > grub2 install /dev/sdc
This is the correct syntax to install it to the MBR of /dev/sdc. Is
there enough room for the larger MBR on that hard drive? I think that
grub2 requires at least 1 MB at the start of the drive. What does
fdisk show? What offset does /dev/sdc1 start at?
> >
> > The command ls -l /dev/sd*
> > give me this output :
> > er@zorro ~]$ ls -l /dev/sd*
> > brw-rw----. 1 root disk 8, 0 Nov 19 16:49 /dev/sda
> > brw-rw----. 1 root disk 8, 1 Nov 19 16:49 /dev/sda1
> > brw-rw----. 1 root disk 8, 16 Nov 19 16:49 /dev/sdb
> > brw-rw----. 1 root disk 8, 17 Nov 19 16:49 /dev/sdb1
> > brw-rw----. 1 root disk 8, 18 Nov 19 16:49 /dev/sdb2
> > brw-rw----. 1 root disk 8, 32 Nov 19 16:49 /dev/sdc
> > brw-rw----. 1 root disk 8, 33 Nov 19 16:49 /dev/sdc1
> > brw-rw----. 1 root disk 8, 34 Nov 19 16:49 /dev/sdc2
> > brw-rw----. 1 root disk 8, 37 Nov 19 16:49 /dev/sdc5
> >
> > I used the command grub2 install /dev/sdc, thinking fedora is
> > installed on /dev/sdc...
> >
> > -------------------------
> > Actually I can start fedora only using the "disk GRUB 2 for
> > recovery" but I would like start the computer regularly....
> >
> >
> > My ask is : what is the correct value of the parameter /dev/sdX in
> > the command grub2-install
I think your issue isn't the install of grub2 on the MBR, it is the
boot order in the bios of your computer. The bios has to point to the
hard drive that has the MBR you want to boot from. So, in your case,
you should make sure the boot order in the bios looks at /dev/sdc. In
most modern bioses, there is a function key you can hit to select the
boot device at boot time. Or a key to hit to edit the bios
configuration.
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