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linux添加硬盘后都需要一个操作操作才能使用那就是挂载，在企业环境中我们的数据盘和系统盘一般都是分开的。前几天一个朋友让我帮忙分下区把数据盘挂载到/home下去。（个人需求吧，有些公司一般都是专门在'/'下面创建一个data 来做数据盘）。操作记录下了来分享给大家，新手复习，老鸟绕道（如果这些都看不懂的话，Linux需要恶补额！！！） |
需求：需要把系统盘搞到/home 下面。
思考：/home 下面是用户默认的家目录，如果用户家目录有数据是会被覆盖的。找朋友确认是刚安装的系统才开始搞的。更改分区大小首先想到的是lvm，但是看了客户的磁盘信息发现不需要考虑这些，怎么简单怎么来。
[root@localhost/]#fdisk-l查看硬盘信息Disk/dev/sda:240.1GB,240057409536bytes,468862128sectors
Units=sectorsof1*512=512bytes
Sectorsize(logical/physical):512bytes/512bytes
I/Osize(minimum/optimal):512bytes/512bytes
Disklabeltype:dos
Diskidentifier:0x00085ef7
DeviceBootStartEndBlocksIdSystem
/dev/sda1*2048102604751200083Linux
/dev/sda2102604817803263838860882Linuxswap/Solaris
/dev/sda31780326446886092722552883283Linux
Disk/dev/sdb:240.1GB,240057409536bytes,468862128sectors
Units=sectorsof1*512=512bytes
Sectorsize(logical/physical):512bytes/512bytes
I/Osize(minimum/optimal):512bytes/512bytes
Disk/dev/sdc:500.1GB,500107862016bytes,976773168sectors
Units=sectorsof1*512=512bytes
Sectorsize(logical/physical):512bytes/512bytes
I/Osize(minimum/optimal):512bytes/512bytes
Disklabeltype:dos
Diskidentifier:0x0007a974
DeviceBootStartEndBlocksIdSystem
/dev/sdc120489767731194883855368eLinuxLVM
Disk/dev/sdd:240.1GB,240057409536bytes,468862128sectors
Units=sectorsof1*512=512bytes
Sectorsize(logical/physical):512bytes/512bytes
I/Osize(minimum/optimal):512bytes/512bytes
Disklabeltype:dos
Diskidentifier:0x000a4688
DeviceBootStartEndBlocksIdSystem
/dev/sdd1*2048102604751200083Linux
/dev/sdd210260484688609272339174408eLinuxLVM
数据的操作是需要非常严谨的，看到了这么多的硬盘，有看到了lvm分区。对于新装的系统我第一感觉是：难道要我修复lvm分区吗？经过和朋友确认发现我想多了，只是挂载，磁盘已经拔掉了。
磁盘分区
[root@localhost/]#fdisk/dev/sdb\\针对第二块盘分区Welcometofdisk(util-linux2.23.2).
Changeswillremaininmemoryonly,untilyoudecidetowritethem.
Becarefulbeforeusingthewritecommand.
Devicedoesnotcontainarecognizedpartitiontable
BuildinganewDOSdisklabelwithdiskidentifier0x6511fa23.Command(mforhelp):p\\查看已有分区Disk/dev/sdb:240.1GB,240057409536bytes,468862128sectors
Units=sectorsof1*512=512bytes
Sectorsize(logical/physical):512bytes/512bytes
I/Osize(minimum/optimal):512bytes/512bytes
Disklabeltype:dos
Diskidentifier:0x6511fa23
DeviceBootStartEndBlocksIdSystemCommand(mforhelp):n\\创建分区Partitiontype:
pprimary(0primary,0extended,4free)
eextendedSelect(defaultp):p\\主分区Partitionnumber(1-4,default1):
Firstsector(2048-468862127,default2048):
Usingdefaultvalue2048
Lastsector, sectorsor size{K,M,G}(2048-468862127,default468862127):
Usingdefaultvalue468862127
Partition1oftypeLinuxandofsize223.6GiBissetCommand(mforhelp):p\\查看确认分区
Disk/dev/sdb:240.1GB,240057409536bytes,468862128sectors
Units=sectorsof1*512=512bytes
Sectorsize(logical/physical):512bytes/512bytes
I/Osize(minimum/optimal):512bytes/512bytes
Disklabeltype:dos
Diskidentifier:0x6511fa23
DeviceBootStartEndBlocksIdSystem
/dev/sdb1204846886212723443004083LinuxCommand(mforhelp):w\\保存改分区Thepartitiontablehasbeenaltered!
Callingioctl()tore-readpartitiontable.
Syncingdisks.
分区格式化
[root@localhost/]#mkfs\\tab万能操作mkfsmkfs.btrfsmkfs.cramfsmkfs.ext2mkfs.ext3mkfs.ext4mkfs.minixmkfs.xfs
[root@localhost/]#mkfs.xfs/dev/sdb1格式化sdb1meta-data=/dev/sdb1isize=256agcount=4,agsize=14651878blks
=sectsz=512attr=2,projid32bit=1
=crc=0finobt=0
data=bsize=4096blocks=58607510,imaxpct=25
=sunit=0swidth=0blks
naming=version2bsize=4096ascii-ci=0ftype=0
log=internallogbsize=4096blocks=28616,version=2
=sectsz=512sunit=0blks,lazy-count=1
realtime=noneextsz=4096blocks=0,rtextents=0
查看检查分区
[root@localhost/]#lsblkNAMEMAJ:MINRMSIZEROTYPEMOUNTPOINT
sda8:00223.6G0disk
├─sda18:10500M0part/boot
├─sda28:208G0part[SWAP]
└─sda38:30215.1G0part/
sdb8:160223.6G0disk
└─sdb18:170223.6G0part
挂载分区，找到uuid，写入fstab
[root@localhost/]#blkid/dev/sdb1查看sdb1的uuid写入fstabuuid最稳定/dev/sdb1也可以
/dev/sdb1:UUID="ffbd4feb-c55e-40ca-86d3-c43919bd9060"TYPE="xfs"
[root@localhost/]#echo"/dev/sdb1:UUID="ffbd4feb-c55e-40ca-86d3-c43919bd9060"TYPE="xfs""
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