Linux非LVM下文件系统扩容.docx

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1、原来linux不用LVM也能扩展文件系统以前总以为UNIX/LINUX使用了lvm才能扩展或缩小卷和文件系统，今天才发现我错了：即使没有lvm，linux也能扩展卷和及其相应的文件系统而不会丢失原有数据。以下是测试步骤，记录备查。 1、系统是redhatlinux6[root@localhostku]#uname-r2.6.32-131.0.15.el6.x86_64[root@localhostku]#more/etc/redhat-releaseRedHatEnterpriseLinuxSe

2、rverrelease6.1(Santiago)[root@localhostku]# 2、创建/dev/sdb1及其文件系统，创建文本文件[root@localhostku]#echowelcometoredhatworld>ricky[root@localhostku]#morerickywelcometoredhatworld 3、目前/dev/sdb1对应的文件系统/ku为1.2G[root@localhostku]#df-hFilesystem           Size UsedA

3、vailUse%Mountedon/dev/mapper/VolGroup-lv_root                      16G 3.7G  11G 25%/tmpfs                613M  88K 613M  1%/dev/shm/dev/sda1            485M  32M 428M  7%/boot/dev/sdb1            1.2G  34M 1.1G  3%/ku 4、卸载/ku[root@localhostku]#cd/[r

4、oot@localhost/]#umount/ku[root@localhost/]# 5、用fdisk命令删除/dev/sdb1分区，然后重新创建/dev/sdb1分区，并指定大小为4G[root@localhost/]#fdisk/dev/sdbWARNING:DOS-compatiblemodeisdeprecated.It'sstronglyrecommendedto        switchoffthemode(command'c')andchangedisplayunitsto  

5、      sectors(command'u').Command(mforhelp):pDisk/dev/sdb:5368MB,5368709120bytes255heads,63sectors/track,652cylindersUnits=cylindersof16065*512=8225280bytesSectorsize(logical/physical):512bytes/512bytesI/Osize(minimum/optimal):512bytes/512bytesDiskid

6、entifier:0x54f7c6df  DeviceBoot     Start        End     Blocks  Id System/dev/sdb1              1        393    3156741  83 LinuxCommand(mforhelp):dSelectedpartition1Command(mforhelp):nCommandaction  e  extended  p  primarypartition(1-4)pPartitionnu

7、mber(1-4):1Firstcylinder(1-652,default1): Usingdefaultvalue1Lastcylinder,+cylindersor+size{K,M,G}(1-652,default652):+4GCommand(mforhelp):wThepartitiontablehasbeenaltered!Callingioctl()tore-readpartitiontable.Syncingdisks.[root@localhost/]# 6、fdisk-l/

8、dev/sdb输出可以看出，cylinder已经由393扩为523[root@localhost/]#fdisk-l/dev/sdbDisk/dev/sdb:5368MB,5368709120bytes255heads,63sectors/track,652cylindersUnits=cylindersof16065*512=8225280bytesSectorsize(logical/physical):512bytes/512bytesI/Osize(minimum/optimal):51