Huawei recorded mount virtual machine disk experience .....
Linux fdisk is a program for creating and maintaining the partition table, which is compatible with DOS type partition table, BSD or SUN type of disk list.
fdisk -l displays the current partition, the data see: https://www.runoob.com/linux/linux-comm-fdisk.html
Seen below, Huawei 2T space allocated, but have not been partitioned. Actually mounts the steps of:
- Physical space for the partition
- Create a file system disk partition (xfs / ext)
- Mounting
1. The physical space for the partition
Partitioning can be found:
- https://blog.csdn.net/qq_35036995/article/details/80532351
- https://www.cnblogs.com/rosepotato/p/8177988.html
>>>fdisk /dev/vdb
>>> Common: m # menu display command
>>> Common: n # to add a new partition
>>> Common: select the prompts (continuous press Enter to select the default option
>>> Common: w # save changes
>>> fdisk -l # to view more partitions, partition device called vdb1
2. Create a file system disk partition (xfs / ext)
>>>mkfs.xfs -f /dev/vdb1
xfs and ext Overview:
- centos7.0 start is the default file system xfs, centos6 is ext4, centos5 is ext3
- ext3 and ext4 biggest difference is that, when the ext3 fsck time-consuming (more files, the longer the time), but in the fsck with ext4 time will be very much less
- ext4 is the fourth generation of extended file system (English: Fourth EXtended filesystem, abbreviated as ext4) is the log file system in linux system, is the successor to ext3 file system
- ext4的文件系统容量达到1EB，而文件容量则达到16TB，这是一个非常大的数字了。对一般的台式机和服务器而言，这可能并不重要，但对于大型磁盘阵列的用户而言，这就非常重要了。
- ext3目前只支持32000个子目录，而ext4取消了这一限制，理论上支持无限数量的子目录
- xfs是一种非常优秀的日志文件系统，它是SGI公司设计的。xfs被称为业界最先进的、最具可升级性的文件系统技术
- xfs是一个64位文件系统，最大支持8EB减1字节的单个文件系统，实际部署时取决于宿主操作系统的最大块限制。对于一个32位Linux系统，文件和文件系统的大小会被限制在16TB
- xfs在很多方面确实做的比ext4好，ext4受限制于磁盘结构和兼容问题，可扩展性和scalability确实不如xfs，另外xfs经过很多年发展，各种锁的细化做的也比较好
一旦创建完文件系统以后，就可以查看此分区的唯一标识UUID(Universally Unique Identifier) 及文件类型
>>>ls -l /dev/disk/by-uuid/ #查看每个设备的唯一标识(UUID)
>>>blkid #查看blockid及类型
3.挂载
- /etc/fstab配置挂载选项
- 执行挂载操作
fstab配置参见：https://blog.csdn.net/lanmolei814/article/details/45692153
>>> mount -o ro /dev/vdb1 /data #以ro(只读)模式挂载后，则/data路径下将无法创建文件
>>>umount /data #如果提示target is busy，可能是/data目录被占用，退出即可，或则用lsof /dev/vdb1查看相关信息
>>>mount -o rw /dev/vdb1 /data
BINGO！！！