-d

Specifies that the data section of the filesystem should be grown. If the -D size option is given, thedata section is grown to that size, otherwise the data section is grown to the largest size possiblewith the -d option. The size is expressed in filesystem blocks.

-i

The new log is an internal log (inside the data section). [NOTE: This option is not implemented]

-l

Specifies that the log section of the filesystem should be grown, shrunk, or moved. If the -L sizeoption is given, the log section is changed to be that size, if possible. The size is expressed infilesystem blocks. The size of an internal log must be smaller than the size of an allocation group(this value is printed at mkfs(8) time). If neither -i nor -x is given with -l, the log continues to beinternal or external as it was before. [NOTE: These options are not implemented]

-r

Specifies that the real-time section of the filesystem should be grown. If the -R size option is given,the real-time section is grown to that size, otherwise the real-time section is grown to the largestsize possible with the -r option. The size is expressed in filesystem blocks. The filesystem does notneed to have contained a real-time section before the xfs_growfs operation.

-V

xfs_growfs is most often used in conjunction with logical volumes (see md(4) and lvm(8) on Linux). However,it can also be used on a regular disk partition, for example if a partition has been enlarged while retainingthe same starting block.PRACTICAL USEFilesystems normally occupy all of the space on the device where they reside. In order to grow a filesystem,it is necessary to provide added space for it to occupy. Therefore there must be at least one spare new diskpartition available. Adding the space is often done through the use of a logical volume manager.EXAMPLESUnderstanding xfs_info output.Suppose one has the following "xfs_info /dev/sda" output:meta-data=/dev/sda isize=256 agcount=32, agsize=16777184 blks= sectsz=512 attr=2data = bsize=4096 blocks=536869888, imaxpct=5= sunit=32 swidth=128 blksnaming =version 2 bsize=4096log =internal bsize=4096 blocks=32768, version=2= sectsz=512 sunit=32 blks, lazy-count=1realtime =none extsz=524288 blocks=0, rtextents=0Here, the data section of the output indicates "bsize=4096", meaning the data block size for this filesystemis 4096 bytes. This section also shows "sunit=32 swidth=128 blks", which means the stripe unit is 32*4096bytes = 128 kibibytes and the stripe width is 128*4096 bytes = 512 kibibytes. A single stripe of thisfilesystem therefore consists of four stripe units (128 blocks / 32 blocks per unit).