failing to enlarge a partition

gistfile1.txt

Trying to enlarge a VM's LVM partition from 400GB to 800GB.

I gave it more disk from the hypervisor and had the kernel rescan the SCSI bus, which worked:

dmesg:

[3879444.655318] sd 0:0:0:0: [sda] 1677721600 512-byte logical blocks: (859 GB/800 GiB)
[3879444.655447] sda: detected capacity change from 429496729600 to 858993459200

Old values:

# lsblk
NAME                  MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
sda                     8:0    0   800G  0 disk
├─sda1                  8:1    0   243M  0 part  /boot
├─sda2                  8:2    0     1K  0 part
└─sda5                  8:5    0 399.8G  0 part
  └─sda5_crypt        254:0    0 399.8G  0 crypt
    ├─bard--vg-root   254:1    0 391.8G  0 lvm   /
    └─bard--vg-swap_1 254:2    0     8G  0 lvm   [SWAP]
sr0                    11:0    1  1024M  0 rom


I want to make the sda5* stuff twice as big.


root@bard:/home/bradfitz# fdisk /dev/sda

Welcome to fdisk (util-linux 2.29.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): p
Disk /dev/sda: 800 GiB, 858993459200 bytes, 1677721600 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
Disklabel type: dos
Disk identifier: 0x817488f7

Device     Boot  Start       End   Sectors   Size Id Type
/dev/sda1  *      2048    499711    497664   243M 83 Linux
/dev/sda2       501758 838858751 838356994 399.8G  5 Extended
/dev/sda5       501760 838858751 838356992 399.8G 83 Linux

Command (m for help): d
Partition number (1,2,5, default 5): 

Partition 5 has been deleted.

Command (m for help): d
Partition number (1,2, default 2): 

Partition 2 has been deleted.

Command (m for help): p
Disk /dev/sda: 800 GiB, 858993459200 bytes, 1677721600 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
Disklabel type: dos
Disk identifier: 0x817488f7

Device     Boot Start    End Sectors  Size Id Type
/dev/sda1  *     2048 499711  497664  243M 83 Linux

Command (m for help): n
Partition type
   p   primary (1 primary, 0 extended, 3 free)
   e   extended (container for logical partitions)
Select (default p): e
Partition number (2-4, default 2): 
First sector (499712-1677721599, default 499712): 501758
Last sector, +sectors or +size{K,M,G,T,P} (501758-1677721599, default 1677721599): 

Created a new partition 2 of type 'Extended' and of size 799.8 GiB.

Command (m for help): p
Disk /dev/sda: 800 GiB, 858993459200 bytes, 1677721600 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
Disklabel type: dos
Disk identifier: 0x817488f7

Device     Boot  Start        End    Sectors   Size Id Type
/dev/sda1  *      2048     499711     497664   243M 83 Linux
/dev/sda2       501758 1677721599 1677219842 799.8G  5 Extended



Command (m for help): p
Disk /dev/sda: 800 GiB, 858993459200 bytes, 1677721600 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
Disklabel type: dos
Disk identifier: 0x817488f7

Device     Boot Start    End Sectors  Size Id Type
/dev/sda1  *     2048 499711  497664  243M 83 Linux

Command (m for help): n
All space for primary partitions is in use.
Adding logical partition 5
First sector (503806-1677721599, default 503808): 501760
Value out of range.