open 0
LV Size 15.00 GiB
Current LE 3840
Segments 2
Allocation inherit
Read ahead sectors auto
currently set to 8192
Block device 253:0
格式化lv為ext4文件類型：mkfs -t ext4 /dev/mail_store/mail
[root@localhost ~]# mkfs -t ext4 /dev/mail_store/mail
mke2fs 1.42.9 (28-Dec-2013)
文件系統(tǒng)標(biāo)簽=
OS type: Linux
塊大小=4096 (log=2)
分塊大小=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
983040 inodes, 3932160 blocks
196608 blocks (5.00%) reserved for the super user
第一個(gè)數(shù)據(jù)塊=0
Maximum filesystem blocks=2151677952
120 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208
Allocating group tables: 完成
正在寫入inode表: 完成
Creating journal (32768 blocks): 完成
Writing superblocks and filesystem accounting information: 完成
掛載lv到/mnt目錄：mount /dev/mail_store/mail /mnt/
[root@localhost ~]# mount /dev/mail_store/mail /mnt/
[root@localhost ~]# df -Th
文件系統(tǒng) 類型 容量 已用 可用 已用% %u6302載點(diǎn)
/dev/sda2 ext4 17G 3.5G 13G 22% /
devtmpfs devtmpfs 897M 0 897M 0% /dev
tmpfs tmpfs 912M 0 912M 0% /dev/shm
tmpfs tmpfs 912M 9.1M 903M 1% /run
tmpfs tmpfs 912M 0 912M 0% /sys/fs/cgroup
/dev/sda1 xfs 1014M 175M 840M 18% /boot
tmpfs tmpfs 183M 20K 183M 1% /run/user/1000
/dev/sr0 iso9660 3.8G 3.8G 0 100% /run/media/mcq/RHEL-7.4 Server.x86_64
tmpfs tmpfs 183M 0 183M 0% /run/user/0
/dev/mapper/mail_store-mail ext4 15G 41M 14G 1% /mnt
[root@localhost ~]#
總結(jié)步驟：
a、pvcreate /dev/sdc1創(chuàng)建一個(gè)新的pv分區(qū)
注：可能報(bào)錯(cuò)，需要更新分區(qū)表，執(zhí)行partprobe,再執(zhí)行
partprobe
[root@localhost ~]# pvcreate /dev/sdb2
Physical volume "/dev/sdb2" successfully created.
b、vgextand ROOT /dev/sdc1將新的pv分區(qū)擴(kuò)容到vg組ROOT
[root@localhost ~]# vgextend VAR /dev/sdb2
Volume group "VAR" successfully extended
c、lvextend /dev/VAR/var /dev/sdb2或 lvextend -L 20G /dev/VAR/var 將新擴(kuò)容的空間放入lv卷
[root@localhost ~]# lvextend /dev/VAR/var /dev/sdb2
Size of logical volume VAR/var changed from 2.00 GiB (512 extents) to <12.00 GiB (3071 extents).
Logical volume VAR/var successfully resized.
d、resize2fs /dev/VAR/var
[root@localhost ~]# resize2fs /dev/VAR/var
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/VAR/var is mounted on /var; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 2
The filesystem on /dev/VAR/var is now 3144704 blocks long.
df -Th能看到/dev/VAR/var已經(jīng)擴(kuò)容
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