Growing LVM partitions with XFS
After (finally) swapping the 240G SATA to a 1000G one in my NAS, this is what I’ve done to get the rootfs extended.
First of all, this is the current status of my disk:
nas:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 636.9G 0 loop /mnt/data/media/games
sda 8:0 0 931.5G 0 disk
├─sda1 8:1 0 600M 0 part /boot/efi
├─sda2 8:2 0 1G 0 part /boot
└─sda3 8:3 0 222G 0 part
└─fedora_fedora-root 252:0 0 222G 0 lvm /
nas:~# pvdisplay
--- Physical volume ---
PV Name /dev/sda3
VG Name fedora_fedora
PV Size 221.98 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 56827
Free PE 0
Allocated PE 56827
PV UUID 5xZhit-jL8J-YFce-XGO2-e412-DKIe-hVV0Qf
Extending the partitions with parted
First step is to group the sda3 partition from its glorious 222G to whatever I can take:
nas:~# parted
GNU Parted 3.6
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) help
align-check TYPE N check partition N for TYPE(min|opt) alignment
help [COMMAND] print general help, or help on COMMAND
mklabel,mktable LABEL-TYPE create a new disklabel (partition table)
mkpart PART-TYPE [FS-TYPE] START END make a partition
name NUMBER NAME name partition NUMBER as NAME
print [devices|free|list,all] display the partition table, or available devices, or free space, or all found partitions
quit exit program
rescue START END rescue a lost partition near START and END
resizepart NUMBER END resize partition NUMBER
rm NUMBER delete partition NUMBER
select DEVICE choose the device to edit
disk_set FLAG STATE change the FLAG on selected device
disk_toggle [FLAG] toggle the state of FLAG on selected device
set NUMBER FLAG STATE change the FLAG on partition NUMBER
toggle [NUMBER [FLAG]] toggle the state of FLAG on partition NUMBER
type NUMBER TYPE-ID or TYPE-UUID type set TYPE-ID or TYPE-UUID of partition NUMBER
unit UNIT set the default unit to UNIT
version display the version number and copyright information of GNU Parted
(parted) print free
Model: ATA CT1000BX500SSD1 (scsi)
Disk /dev/sda: 1000GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
17.4kB 1049kB 1031kB Free Space
1 1049kB 630MB 629MB fat32 EFI System Partition boot, esp
2 630MB 1704MB 1074MB xfs
3 1704MB 240GB 238GB lvm
240GB 1000GB 760GB Free Space
Then tried to resize partition without reading the manual (it didn’t go well):
(parted) resizepart 3
End? [240GB]? 1000GB
Error: Can't have overlapping partitions.
After reading the manual, percentages can be used. I’ve took the remaining free space just for this partition.
(parted) resizepart 3 100%
(parted) print
Model: ATA CT1000BX500SSD1 (scsi)
Disk /dev/sda: 1000GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 630MB 629MB fat32 EFI System Partition boot, esp
2 630MB 1704MB 1074MB xfs
3 1704MB 1000GB 999GB lvm
(parted) quit
Executed partprobe afterwards to refresh the thing:
nas:~# partprobe /dev/sda
Resizing the LVM volumes
Next steps, to extend the physical and logical volumes:
nas:~# df -hT
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/fedora_fedora-root xfs 222G 170G 53G 77% /
nas:~# pvresize /dev/sda3
Physical volume "/dev/sda3" changed
1 physical volume(s) resized or updated / 0 physical volume(s) not resized
Physical volume was simple enough, the options for lvextend were not trivial to me;
-l option takes (extents) takes a value with a unit. %FREE seems to be a unit by itself.
Thus the following grows the logical volume to the maximum free space after it.
nas:~# lvextend -l +100%FREE /dev/mapper/fedora_fedora-root
Size of logical volume fedora_fedora/root changed from 221.98 GiB (56827 extents) to 929.92 GiB (238060 extents).
Logical volume fedora_fedora/root successfully resized.
Resize the file-system
In my case, my root is using XFS, then it’s simple enough:
nas:~# xfs_growfs /
meta-data=/dev/mapper/fedora_fedora-root isize=512 agcount=60, agsize=983040 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=1, sparse=1, rmapbt=0
= reflink=1 bigtime=0 inobtcount=0 nrext64=0
= exchange=0
data = bsize=4096 blocks=58190848, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0, ftype=1, parent=0
log =internal log bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 58190848 to 243773440
nas:~# df -h /
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/fedora_fedora-root 930G 175G 756G 19% /
Done.