63 lines
1.8 KiB
Markdown
63 lines
1.8 KiB
Markdown
### 新硬盘创建lv
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##### 手动添加磁盘
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```
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echo "scsi add-single-device w x y z" > /proc/scsi/scsi
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其中，w,x,y,z需要根据/proc/scsi/scsi文件中的数据替换
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http://blog.chinaunix.net/uid-26557245-id-3307138.html
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不关机添加磁盘
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```
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```
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echo "- - -" > /sys/class/scsi_host/host0/scan
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echo "- - -" > /sys/class/scsi_host/host1/scan
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echo "- - -" > /sys/class/scsi_host/host2/scan
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```
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```
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1、查看磁盘#fdisk -l
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2-1、创建分区(小于或等于2T)#fdisk /dev/sdb
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2-2、创建分区(大于2T)#parted /dev/sdb
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>mklabel gpt
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>unit s
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>mkpart /dev/sdb1 2048s 100% ## 设置分区名称及大小
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>q
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3、更新内核分区表#partprobe /dev/sdb1
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4、创建pv#pvcreate /dev/sdb1
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5、创建vg# vgcreate vg_opt /dev/sdb1 ###vg_opt是该vg的名字
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6、创建lv#lvcreate -L 5G -n lv_opt vg_opt ###-L后面是lv大小，-n后面是lv名字
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100%VG#lvcreate -l 100%VG -n lv_opt vg_opt
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7、格式化lv#mkfs.ext4 /dev/mapper/vg_opt-lv_opt
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8、挂载lv#mount /dev/mapper/vg_opt-lv_opt /opt
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9、写入fstab
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/dev/mapper/vg_opt-lv_opt /opt ext4 defaults 1 1
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```
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##### 扩展lv (ext)
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```
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1、创建pv#pvcreate /dev/sda5
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2、扩展vg#vgextend vg_opt /dev/sda5
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3、扩展lv#lvextend –L +1G /dev/mapper/vg_opt-lv_opt
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100%VG#lvextend -l +100%FREE /dev/mapper/vg_opt-lv_opt
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4、重定义lv大小#resize2fs /dev/mapper/vg_opt-lv_opt
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```
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##### 扩展lv (xfs)
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```
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1、创建pv#pvcreate /dev/sda5
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2、扩展vg#vgextend vg_opt /dev/sda5
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3、扩展lv#lvextend –L +1G /dev/mapper/vg_opt-lv_opt
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100%VG#lvextend -l +100%FREE /dev/mapper/vg_opt-lv_opt
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4、重定义lv大小#xfs_growfs /dev/mapper/vg_opt-lv_opt
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```
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##### 其他
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```
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vg去掉特定pv # vgreduce centos /dev/sdb1
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```
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