boot - Missing Operating System on USB drive - Ask Ubuntu


this question has answer here:

i'm trying install minimal ubuntu installation on usb drive (complete install, not live boot). after installation, however, when try boot usb, "missing operating system".

i think there might problem grub, don't know how fix it. i've done install usb before messed main grub file, don't want that.

this output of fdisk -l pertaining usb drive:

disk /dev/sdc: 4027 mb, 4027580416 bytes 124 heads, 62 sectors/track, 1023 cylinders, total 7866368 sectors units = sectors of 1 * 512 = 512 bytes sector size (logical/physical): 512 bytes / 512 bytes i/o size (minimum/optimal): 512 bytes / 512 bytes disk identifier: 0x73a571aa  device boot      start         end      blocks   id  system /dev/sdc1            2048     7616511     3807232   83  linux /dev/sdc2         7618558     7864319      122881    5  extended /dev/sdc5         7618560     7864319      122880   82  linux swap / solaris

also, boot partition may not labeled bootable, based on output. please help!

update

i followed terrance's suggestion, /dev/sdc1 labeled boot partition. however, drive still won't boot.

i not asking how install ubuntu usb drive, i'm asking fixing usb i've installed ubuntu to.

update

terrance's updated answer solved me. note, working on usb had create /boot/extlinux/syslinux.cfg file containing:

prompt 0 timeout 50 default arch  label arch         linux ../vmlinuz-4.4.0-45-generic         append root=uuid=[the usb uuid]         initrd ../initrd.img-4.4.0-45-generic

you can set boot flag on first partition of usb drive typing in following terminal window:

sudo parted /dev/sdc set 1 boot on

also try installing extlinux , syslinux-common putting boot files on usb drive. terminal, type in:

sudo apt install extlinux syslinux-common

after installed, have usb drive in , type in:

sudo mkdir -p /mnt/usb/boot/extlinux sudo extlinux --install /mnt/usb/boot/extlinux

or whatever mount point usb drive /media/username/1001-baab/boot/extlinux

then should install mbr code usb drive following command: don't worry, not overwrite usb drive.

dd if=/usr/lib/extlinux/mbr.bin of=/dev/sdc bs=440 count=1

make sure /dev/sdc usb drive.

more info can found here: http://shallowsky.com/linux/extlinux.html

from manpage extlinux:

name        extlinux  -  install  syslinux bootloader on ext2/ext3/ext4/btrfs        filesystem

hope helps!


Comments

Post a Comment

Popular posts from this blog

download - Firefox cannot save files (most of the time), how to solve? - Super User

this not full duplicate of this question or this question , though base question same. however, questions have no answers. for on half year have problems downloading files firefox. when click on download link, download dialog opened asking me do, save or open it. immediately, there error/warning pop-up (twice, can see 1 @ first) ok button. looks this message : "c:\users\%user%\appdata\local\temp\wbbdv9k8.zip.part not saved because source file not read. try again later or contact server administrator." replace '%user%' name of user trying download. after closing pop-up, download dialog disappears , have minimize firefox , open again, see other pop-up. downloading exact same file internet explorer work, not desired. i tried solutions here . tried solutions here . tried disabling extensions. tried fixing permissions on temp folder. tried making files , folder in profile directory non-readonly. tried running firefox administrator. tried ...
Read more

windows - "-2146893807 NTE_NOT_FOUND" when repair certificate store - Super User

i try repair certificate store in windows 10 doing c:\windows\system32>certutil -store -user ‎330000019dba8d5dddb98062a900000000019d "personal" certutil: -store command failed: 0x80090011 (-2146893807 nte_not_found) certutil: object not found. i have double check mmc, certificate details serial number of certificate. still fail repair certificate store. can please help? i getting same error when trying export pfx. turns out had export c:\cert.pfx instead of cert.pfx (it trying export file cert store ( cert:\localmachine\my ).
Read more