$ lsblk
NAME    MAJ:MIN  RM  SIZE RO TYPE  MOUNTPOINT
xvdn    202:208   0    4G  0 disk
└─md0     9:0     0   16G  0 raid0 /mnt/data
xvdc    202:32    0   80G  0 disk
└─md1     9:1     0  160G  0 raid0 /mnt/temp
xvda    202:0     0    8G  0 disk
└─xvda1 202:1     0    8G  0 part  /
xvdp    202:240   0    4G  0 disk
└─md0     9:0     0   16G  0 raid0 /mnt/data
xvdo    202:224   0    4G  0 disk
└─md0     9:0     0   16G  0 raid0 /mnt/data
xvdb    202:16    0   80G  0 disk
└─md1     9:1     0  160G  0 raid0 /mnt/temp
xvdq    202:4096  0    4G  0 disk
└─md0     9:0     0   16G  0 raid0 /mnt/data

$ sudo file -s /dev/xvd*
/dev/xvda:  DOS/MBR boot sector; GRand Unified Bootloader, stage1 version 0x3, stage2 address 0x2000, 1st sector stage2 0x800, stage2 segment 0x200, GRUB version 0.94, extended partition table (last)
/dev/xvda1: Linux rev 1.0 ext4 filesystem data, UUID=1afa51d9-105a-4c14-8f32-8b8b424b1c81 (needs journal recovery) (extents) (large files) (huge files)
/dev/xvdb:  Linux Software RAID version 1.2 (1) UUID=cbe5ee82:c33cad21:699bec71:b4cf4a63 name=dbx_head:head_ephem level=0 disks=2
/dev/xvdc:  Linux Software RAID version 1.2 (1) UUID=cbe5ee82:c33cad21:699bec71:b4cf4a63 name=dbx_head:head_ephem level=0 disks=2
/dev/xvdn:  Linux Software RAID version 1.2 (1) UUID=c42b27c0:3586d4c5:635e2925:39a006e5 name=dbx_head:head_ebs level=0 disks=4
/dev/xvdo:  Linux Software RAID version 1.2 (1) UUID=c42b27c0:3586d4c5:635e2925:39a006e5 name=dbx_head:head_ebs level=0 disks=4
/dev/xvdp:  Linux Software RAID version 1.2 (1) UUID=c42b27c0:3586d4c5:635e2925:39a006e5 name=dbx_head:head_ebs level=0 disks=4
/dev/xvdq:  Linux Software RAID version 1.2 (1) UUID=c42b27c0:3586d4c5:635e2925:39a006e5 name=dbx_head:head_ebs level=0 disks=4

$ mount
/dev/md0 on /mnt/data type xfs (rw,noatime,nodiratime,swalloc,attr2,largeio,inode64,logbsize=128k,sunit=256,swidth=1024,noquota)
/dev/md1 on /mnt/temp type xfs (rw,noatime,nodiratime,swalloc,attr2,largeio,inode64,sunit=256,swidth=512,noquota)
/dev/md0 on /xdlog type xfs (rw,noatime,nodiratime,swalloc,attr2,largeio,inode64,logbsize=128k,sunit=256,swidth=1024,noquota)

$ xfs_growfs -d /dev/md0
meta-data=/dev/md0               isize=2048   agcount=17, agsize=262112 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=4194176, imaxpct=25
         =                       sunit=32     swidth=128 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=32 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data size unchanged, skipping

NAME    MAJ:MIN  RM  SIZE RO TYPE  MOUNTPOINT
xvdn    202:208   0    6G  0 disk
└─md0     9:0     0   16G  0 raid0 /mnt/data
xvdc    202:32    0   80G  0 disk
└─md1     9:1     0  160G  0 raid0 /mnt/temp
xvda    202:0     0    8G  0 disk
└─xvda1 202:1     0    8G  0 part  /
xvdp    202:240   0    4G  0 disk
└─md0     9:0     0   16G  0 raid0 /mnt/data
xvdo    202:224   0    4G  0 disk
└─md0     9:0     0   16G  0 raid0 /mnt/data
xvdb    202:16    0   80G  0 disk
└─md1     9:1     0  160G  0 raid0 /mnt/temp
xvdq    202:4096  0    4G  0 disk
└─md0     9:0     0   16G  0 raid0 /mnt/data

Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        7.4G   96K  7.4G   1% /dev
tmpfs           7.4G   55M  7.3G   1% /dev/shm
/dev/xvda1      7.8G  1.8G  6.0G  23% /
tmpfs           7.4G   24K  7.4G   1% /home/xdaux/tmp
tmpfs           7.4G  124K  7.4G   1% /home/xdcrm/tmp
/dev/md0         16G   35M   16G   1% /xdlog
/dev/md1        160G  3.1G  157G   2% /mnt/temp