How to Increase the Size of an XFS File System?
I just created an Amazon AWS EC2 instance running RHEL7:
[root@ip-10-184-161-46 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.0 (Maipo)
[root@ip-10-184-161-46 ~]#
And even though I selected 10GB as my storage capacity, for whatever reason I'm only seeing 6GB that's available for me to use right away:
[root@ip-10-184-161-46 ~]# mount | grep xfs | grep -v selinux
/dev/xvda1 on / type xfs (rw,relatime,seclabel,attr2,inode64,noquota)
[root@ip-10-184-161-46 ~]# df -h | grep xvda
/dev/xvda1 6.0G 2.2G 3.9G 37% /
[root@ip-10-184-161-46 ~]# fdisk -l /dev/xvda
Disk /dev/xvda: 10.7 GB, 10737418240 bytes, 20971520 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
Disk label type: dos
Disk identifier: 0x0000b85c
Device Boot Start End Blocks Id System
/dev/xvda1 * 2048 12584959 6291456 83 Linux
[root@ip-10-184-161-46 ~]#
this is what I did:
[root@ip-10-164-175-246 ~]# fdisk -l /dev/xvda
Disk /dev/xvda: 10.7 GB, 10737418240 bytes, 20971520 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
Disk label type: dos
Disk identifier: 0x0000b85c
Device Boot Start End Blocks Id System
/dev/xvda1 * 2048 12584959 6291456 83 Linux
/dev/xvda2 12584960 20971519 4193280 83 Linux
[root@ip-10-164-175-246 ~]# xfs_growfs /
meta-data=/dev/xvda1 isize=256 agcount=4, agsize=393216 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0
data = bsize=4096 blocks=1572864, 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
[root@ip-10-164-175-246 ~]# df -h | grep xvda
/dev/xvda1 6.0G 2.3G 3.8G 38% /
[root@ip-10-164-175-246 ~]#
Where are my other 4GB? I thought running xfs_growfs / will increase the size of my xfs partition.
What am I doing wrong?
Funny, I just did exactly this the other day after finding my RHEL instance on EC2 only had 6GB or so of the 10GB space allocated to it...
[root@ip-172-31-20-177 ~]# xfs_info /
meta-data=/dev/xvda1 isize=256 agcount=4, agsize=393216 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0
data = bsize=4096 blocks=1572864, 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
The problem here is that you created a second partition.
Instead, you should resize the first partition.
So, you will use fdisk to delete the second partition, then delete and re-create the first partition at the same time. The fdisk default values will cause it to fill the disk (and be correctly aligned).
Start fdisk and delete the partition:
[root@ip-172-31-20-177 ~]# fdisk /dev/xvda
Welcome to fdisk (util-linux 2.23.2).
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/xvda: 10.7 GB, 10737418240 bytes, 20971520 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
Disk label type: dos
Disk identifier: 0x0000b85c
Device Boot Start End Blocks Id System
/dev/xvda1 * 2048 12584959 6291456 83 Linux
Command (m for help): d
Selected partition 1
Partition 1 is deleted
Now re-create the partition with all default values, which will maximize its size:
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-20971519, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519):
Using default value 20971519
Partition 1 of type Linux and of size 10 GiB is set
Command (m for help): p
Disk /dev/xvda: 10.7 GB, 10737418240 bytes, 20971520 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
Disk label type: dos
Disk identifier: 0x0000b85c
Device Boot Start End Blocks Id System
/dev/xvda1 2048 20971519 10484736 83 Linux
Save the new partition table:
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
When you reboot, the filesystem should automatically be resized for you by cloud-init. If not, you can use xfs_growfs / to grow the filesystem manually.
[root@ip-172-31-20-177 ~]# xfs_info /
meta-data=/dev/xvda1 isize=256 agcount=7, agsize=393216 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0
data = bsize=4096 blocks=2621184, 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
[root@ip-172-31-20-177 ~]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/xvda1 10474496 818560 9655936 8% /