[ubuntu-uk] Partitioning
David Goldsbrough
daveg at boavon.plus.com
Mon Feb 8 22:32:48 UTC 2016
Let me start Daniel, by saying a big thank you for all your time and
patience in helping me with these issues - I really do appreciate it.
Well, I did what you advised. Deleted the inadvertent /dev/sda3, then
deleted /dev/sda5, and did a new, specifying a logical partition and
accepting the defaults after this. At stage 3 when telling the system that
it was an LVM partition I typed "5" and not "3". I then did a sudo pvresize
/dev/sda5 and had same outputs as last time "Physical volume /dev/sda5
changed 1 physical volume(s) resized/0 physical volume(s) not resized.
sudo lvextend seemed to go ok as did sudo resize2fs. I ran sudo fsck at
the end and all seemed fine.
I did all this from a liveCD again.
But on reboot - an unexpected outcome - it did not boot with the following
outputs:
Gave up waiting for root device
Common problems:
- Boot args (cat /proc/cmdline)
- check rootdelay=(did the system wait long enough?)
- check root=(did the system wait for the right device?)
-Missing modules (cat /proc/modules; ls /dev)
ALERT!
/dev/mapper/ubuntu--vg-root does not exist. Dropping to a shell!
Busy Box v1.21.1 (ubuntu 1:1.21.0-lubuntul) built in shell (ash)
Enter 'help' for a list of built in commands
(initramfs)
>From here I tried a re-boot just in case but the same. I tried re-booting
from my liveCD without success - but I might have an issue with that
liveCD. It kept re-booting to a GRUB 2 screen (which I dont normally see).
So, I have the original 60GB disk and have booted it as a USB drive.
I now append the outputs from fdisk -l, pvdisplay and parted -l which
hopefully gives some clues as to what has happened and assist in correcting.
Of course the outputs show 2 drives - /dev/sdb is my original 60MB I have
booted from.
Hope you can help further
DaveG
$ sudo fdisk -l
Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders, total 234441648 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: 0x0003df66
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 234440703 116969473 5 Extended
/dev/sda5 503806 234440703 116968449 8e Linux LVM
Disk /dev/sdb: 60.0 GB, 60011641856 bytes
64 heads, 32 sectors/track, 57231 cylinders, total 117210238 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: 0x0003df66
Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 499711 248832 83 Linux
/dev/sdb2 501758 117209087 58353665 5 Extended
/dev/sdb5 501760 117209087 58353664 8e Linux LVM
Disk /dev/mapper/ubuntu--vg-root: 57.6 GB, 57612959744 bytes
255 heads, 63 sectors/track, 7004 cylinders, total 112525312 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: 0x00000000
Disk /dev/mapper/ubuntu--vg-root doesn't contain a valid partition table
Disk /dev/mapper/ubuntu--vg-swap_1: 2139 MB, 2139095040 bytes
255 heads, 63 sectors/track, 260 cylinders, total 4177920 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: 0x00000000
Disk /dev/mapper/ubuntu--vg-swap_1 doesn't contain a valid partition table
$ sudo pvdisplay /dev/sda5
No physical volume label read from /dev/sda5
Failed to read physical volume "/dev/sda5"
$ sudo parted -l
Model: ATA TOSHIBA MK1255GS (scsi)
Disk /dev/sda: 120GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 1049kB 256MB 255MB primary ext2 boot
2 257MB 120GB 120GB extended
5 258MB 120GB 120GB logical lvm
Model: Mass Storage Device (scsi)
Disk /dev/sdb: 60.0GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 1049kB 256MB 255MB primary ext2 boot
2 257MB 60.0GB 59.8GB extended
5 257MB 60.0GB 59.8GB logical lvm
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/ubuntu--vg-swap_1: 2139MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 2139MB 2139MB linux-swap(v1)
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/ubuntu--vg-root: 57.6GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 57.6GB 57.6GB ext4
On 8 February 2016 at 18:07, Daniel Llewellyn <diddledan at gmail.com> wrote:
>
>
> On 7 February 2016 at 21:56, David Goldsbrough <daveg at boavon.plus.com>
> wrote:
>
>> Well something happened if not what was desired! But no twisted knickers!
>>
>> I booted from a Ubuntu liveCD and then CTRL-ALT-F1 to get to command
>> prompt and ran all commands as sudo.
>>
>> I scribbled down outputs following many steps/commands you gave but
>> forgive me if I cannot fully transcribe to here - my eyesight is so poor.
>> STEP 1
>> No outputs from 1 to 3 written down but all seemed within order (question
>> though - should I have been typing "5" rather than "3" as per your
>> instruction?)
>>
>
> Yes, I appear to have mistyped.
>
> The partition you now have at /dev/sda3 needs removing with “d” followed
> by “3” and then “enter” again as before.
>
> You also need to repeat the delete step with “5” instead of “3” to remove
> the partition at /dev/sda5.
>
> Then you can redo steps 2 thru 4 after fixing step 2 which I also got
> wrong when I said to “accept the defaults”: you need to specify that you
> want it to create a “logical” partition rather than “primary” when it
> prompts you what type of partition to create. (I believe the prompt is
> "Primary/Logical?" where the response needs to be to type the word
> "logical" followed by enter.)
>
> --
> Regards,
> The Honeymonster Daniel Llewellyn
>
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