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[root@server1 ~]# blkid
/dev/sda1: LABEL="M-gM-3M-;M-gM-;M-^_M-dM-?M-^]M-gM-^UM-^Y" UUID="AE38544F38541923" TYPE="ntfs" ---->>注意其UUID的值
/dev/sdc1: UUID="68315acd-74a4-4e00-9e87-3397345dd46e" TYPE="xfs" PARTLABEL="primary" PARTUUID="744e90d5-1058-487e-86f4-3224b9fda3f7"
/dev/sdb1: UUID="0e1f5254-7868-4753-907d-312c8f9f12b6" TYPE="xfs"
/dev/sdb2: UUID="60a3cdf8-6cc3-4cf9-9163-59f59e8fadf1" TYPE="xfs"
/dev/sdb3: UUID="4a8f08e7-6600-4a63-80ba-735fed3765ab" TYPE="swap"
/dev/sdb5: UUID="6c7c0a86-f796-4bfd-8f9e-5ebef6882c8e" TYPE="xfs"
/dev/loop0: UUID="2017-07-11-01-39-24-00" LABEL="RHEL-7.4 Server.x86_64" TYPE="iso9660" PTTYPE="dos"
[root@server1 ~]# mkfs.xfs /dev/sda1
mkfs.xfs: /dev/sda1 appears to contain an existing filesystem (ntfs).
mkfs.xfs: Use the -f option to force overwrite.
[root@server1 ~]# mkfs.xfs -f /dev/sda1 ---->>>格式化sda1分区为xfs文件系统
meta-data=/dev/sda1 isize=512 agcount=4, agsize=58605696 blks
= sectsz=4096 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=234422784, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=114464, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
[root@server1 ~]# blkid
/dev/sda1: UUID="f9c12958-ad15-4027-8c36-b324fca3c8e0" TYPE="xfs" ---->>注意其UUID的值已经改变
/dev/sdc1: UUID="68315acd-74a4-4e00-9e87-3397345dd46e" TYPE="xfs" PARTLABEL="primary" PARTUUID="744e90d5-1058-487e-86f4-3224b9fda3f7"
/dev/sdb1: UUID="0e1f5254-7868-4753-907d-312c8f9f12b6" TYPE="xfs"
/dev/sdb2: UUID="60a3cdf8-6cc3-4cf9-9163-59f59e8fadf1" TYPE="xfs"
/dev/sdb3: UUID="4a8f08e7-6600-4a63-80ba-735fed3765ab" TYPE="swap"
/dev/sdb5: UUID="6c7c0a86-f796-4bfd-8f9e-5ebef6882c8e" TYPE="xfs"
/dev/loop0: UUID="2017-07-11-01-39-24-00" LABEL="RHEL-7.4 Server.x86_64" TYPE="iso9660" PTTYPE="dos"
[root@server1 ~]#
额外收获：blkid是另外一种查看文件系统类型的命令（其他的类似命令包括：df -Th；cat /proc/mounts）