Caveats
1. The filesystem you want to resize must reside on the last partition of the disk. There is no data loss in this case as we recreate the partition without destroying the actual data on it.
2. In case it is not the last partition, you have to destroy the data and recreate a new partition with the desired size.
Extending partion-based filesystem
1. First, check the existing size of the filesystem.
# # df -hP /data01 Filesystem Size Used Avail Use% Mounted on /dev/nvme1n1p1 1014M 33M 982M 4% /data01
# mount | grep -w data01 /dev/nvme1n1p1 on /data01 type xfs (rw,relatime,seclabel,attr2,inode64,noquota)
As verified from the ‘mount’ command output above, the filesystem on the partition is ‘xfs’.
2. Note the partition details and the disk details using the ‘parted’ command. Ensure that you provide the disk name and not the partition name in the below command:
# parted /dev/nvme1n1 u s p Model: NVMe Device (nvme) Disk /dev/nvme1n1: 4194304s Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags 1 2048s 2099199s 2097152s primary xfs
From the output above, you can see the partition size (2099199s) is less than the disk size (4194304s). So there is room to increase the partition.
3. Umount the filesystem first.
# umount /data01
4. Delete the partition having the filesystem ‘/data01’.
# parted /dev/nvme1n1p1 rm 1 Information: You may need to update /etc/fstab.
Verify if the partition is delete. I had only one partition on the disk, so I should see no partition now.
# parted /dev/nvme1n1 u s p Model: NVMe Device (nvme) Disk /dev/nvme1n1: 4194304s Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags
5. Now, lets recreate the partition with a bigger size. Please note the starting sector from the step 2 i.e. 2048s. We will increase the partition from 1GB to 1.5GB.
# parted -s /dev/nvme1n1 mkpart primary 2048s 1.5G
Verify the new partition size again.
# parted /dev/nvme1n1 u s p Model: NVMe Device (nvme) Disk /dev/nvme1n1: 4194304s Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags 1 2048s 2930687s 2928640s primary
6. We need to run fsck on the newly created partition. Also note, we are not creating any filesystem here, as it is already present on the partition. As we are using the XFS filesystem, use ‘xfs_repair’ command instead of ‘e2fsck’.
# xfs_repair /dev/nvme1n1p1
Phase 1 - find and verify superblock...
bad primary superblock - bad magic number !!!
attempting to find secondary superblock...
.................................................................................................................................................................................................................................................found candidate secondary superblock...
verified secondary superblock...
writing modified primary superblock
sb realtime bitmap inode 18446744073709551615 (NULLFSINO) inconsistent with calculated value 65
resetting superblock realtime bitmap ino pointer to 65
sb realtime summary inode 18446744073709551615 (NULLFSINO) inconsistent with calculated value 66
resetting superblock realtime summary ino pointer to 66
Phase 2 - using internal log
- zero log...
- scan filesystem freespace and inode maps...
sb_icount 0, counted 64
sb_ifree 0, counted 61
sb_fdblocks 259568, counted 259560
- found root inode chunk
Phase 3 - for each AG...
- scan and clear agi unlinked lists...
- process known inodes and perform inode discovery...
- agno = 0
- agno = 1
- agno = 2
- agno = 3
- process newly discovered inodes...
Phase 4 - check for duplicate blocks...
- setting up duplicate extent list...
- check for inodes claiming duplicate blocks...
- agno = 0
- agno = 1
- agno = 2
- agno = 3
Phase 5 - rebuild AG headers and trees...
- reset superblock...
Phase 6 - check inode connectivity...
- resetting contents of realtime bitmap and summary inodes
- traversing filesystem ...
- traversal finished ...
- moving disconnected inodes to lost+found ...
Phase 7 - verify and correct link counts...
Note - stripe unit (0) and width (0) were copied from a backup superblock.
Please reset with mount -o sunit=,swidth= if necessary
done
7. Extend the filesystem, using ‘xfs_growfs’ command. Also before running this command, we need to mount the filesystem, otherwise you would get below error:
# xfs_growfs /dev/nvme1n1p1 xfs_growfs: /dev/nvme1n1p1 is not a mounted XFS filesystem
# mount /dev/nvme1n1p1 /data01
# xfs_growfs /dev/nvme1n1p1
meta-data=/dev/nvme1n1p1 isize=512 agcount=4, agsize=65536 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=262144, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal 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 262144 to 366080
8. Verify the new size of the mount point.
# df -hP /data01 Filesystem Size Used Avail Use% Mounted on /dev/nvme1n1p1 1.4G 33M 1.4G 3% /data01