XFS is a high-performance 64-bit journaling file system created by Silicon Graphics, Inc (SGI) in 1993. It was the default file system in the SGI’s IRIX operating system starting with its version 5.3; the file system was ported to the Linux kernel in 2001, currently is the default file system in CentOS 7.
xfs_growfs allows to enlarge in hot a partition with XFS file system
- It is not possible to enlarge a partition that is not mounted
- It is not possible to use parted to enlarge an XFS partition
- xfs_growfs usually is used with logical volumes (LVM), but can be used with regular partitions too.
- To enlarge a partition, it is necessary that there is available space it will occupy.
# xfs_growfs [OPTIONS] mount-point
xfs_growfs has around a dozen options, but in this post we will look at 2 of them:
-d: partition will be enlarged as much as possible, it will increase up to the total available space
-D: partition will be enlarged until the value specified in size. The size must be given in number of blocks.
Enlarge the partition to the total available space
# xfs_growfs -d /dev/mapper/centos-root
Enlarge the partition to a given size
If we wish to enlarge the partition up to 100 GB and file system blocks size is 4 k, then execute the following command
# xfs_growfs -D 26214400 /dev/mapper/centos-root
To know the block size of the file system we can run the command
# xfs_info /dev/mapper/centos-root meta-data=/dev/mapper/centos-root isize=256 agcount=4, agsize=260096 blks = sectsz=512 attr=2, projid32bit=1 = crc=0 finobt=0 data = bsize=4096 blocks=1040384, imaxpct=25 = sunit=0 swidth=0 blks naming = version 2 bsize = 4096 ascii-ci = 0 ftype = 0 log =internal bsize=4096 blocks=2560, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0
Note the output of bsize = 4096 (4K)
– man xfs_growfs