centos中怎么使用fdisk擴(kuò)展分區(qū)容量大小,相信很多沒有經(jīng)驗的人對此束手無策,為此本文總結(jié)了問題出現(xiàn)的原因和解決方法,通過這篇文章希望你能解決這個問題。
成都創(chuàng)新互聯(lián)成立與2013年,先為大城等服務(wù)建站,大城等地企業(yè),進(jìn)行企業(yè)商務(wù)咨詢服務(wù)。為大城企業(yè)網(wǎng)站制作PC+手機(jī)+微官網(wǎng)三網(wǎng)同步一站式服務(wù)解決您的所有建站問題。擴(kuò)展磁盤空間
硬盤空間為20G,使用vSphere Client增加磁盤大小,需要再增加10G空間;
擴(kuò)展完后,重啟系統(tǒng),再次使用fdisk -l查看,會發(fā)現(xiàn)硬盤空間變大了;
[root@linuxprobe ~]# fdisk -l Disk /dev/sda: 32.2 GB, 32212254720 bytes 255 heads, 63 sectors/track, 3916 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0005210c Device Boot Start End Blocks Id System /dev/sda1 * 1 26 204800 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 26 1301 10240000 83 Linux /dev/sda3 1301 1497 1572864 82 Linux swap / Solaris /dev/sda4 1497 2611 8952832 83 Linux [root@linuxprobe ~]# df -hT Filesystem Type Size Used Avail Use% Mounted on /dev/sda2 ext4 9.7G 1.5G 7.7G 16% / tmpfs tmpfs 939M 0 939M 0% /dev/shm /dev/sda1 ext4 194M 34M 151M 19% /boot /dev/sda4 ext4 8.5G 148M 7.9G 2% /data
重新創(chuàng)建分區(qū),調(diào)整分區(qū)信息
本次實驗主要對/dev/sda4這個分區(qū)擴(kuò)展,如果是生產(chǎn)環(huán)境,請?zhí)崆白龊脗浞荼4娴狡渌謪^(qū),雖然擴(kuò)展分區(qū)大小不會導(dǎo)致數(shù)據(jù)丟失,安全起見,請?zhí)崆白龊脗浞荩?/p>
首先模擬出一些數(shù)據(jù):
[root@linuxprobe data]# mkdir test [root@linuxprobe data]# echo "we are Linuxer" > linuxprobe [root@linuxprobe data]# ll total 24 -rw-r--r--. 1 root root 15 May 23 21:59 linuxprobe drwx------. 2 root root 16384 May 23 15:07 lost+found drwxr-xr-x. 2 root root 4096 May 23 21:51 test [root@linuxprobe ~]# umount /dev/sda4 #卸載磁盤分區(qū)
若提示磁盤忙,使用fuser找出將正在使用磁盤的程序并結(jié)束掉;
fuser -m -v /data fuser -m -v -i -k /data
使用fdisk工具先刪除/dev/sda4分區(qū),然后創(chuàng)建新分區(qū),注意開始的磁柱號要和原來的一致(是保證數(shù)據(jù)不丟失的關(guān)鍵步驟),結(jié)束的磁柱號默認(rèn)回車使用全部磁盤。
[root@linuxprobe ~]# fdisk /dev/sda WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help): p #查看分區(qū)表信息Disk /dev/sda: 32.2 GB, 32212254720 bytes 255 heads, 63 sectors/track, 3916 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0005210c Device Boot Start End Blocks Id System /dev/sda1 * 1 26 204800 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 26 1301 10240000 83 Linux /dev/sda3 1301 1497 1572864 82 Linux swap / Solaris /dev/sda4 1497 2611 8952832 83 Linux Command (m for help): d #刪除分區(qū)Partition number (1-4): 4 #刪除第四個Command (m for help): p #再次查看分區(qū)信息,/dev/sda4已被刪除Disk /dev/sda: 32.2 GB, 32212254720 bytes 255 heads, 63 sectors/track, 3916 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0005210c Device Boot Start End Blocks Id System /dev/sda1 * 1 26 204800 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 26 1301 10240000 83 Linux /dev/sda3 1301 1497 1572864 82 Linux swap / Solaris Command (m for help): n #創(chuàng)建新的分區(qū)Command action e extended p primary partition (1-4) p #創(chuàng)建為主分區(qū) Selected partition 4 First cylinder (1497-3916, default 1497): #經(jīng)對比,正好和上一個磁盤柱一致,默認(rèn)即可Using default value 1497 Last cylinder, +cylinders or +size{K,M,G} (1497-3916, default 3916): Using default value 3916 #直接默認(rèn)就可以Command (m for help): p #查看分區(qū)表信息Disk /dev/sda: 32.2 GB, 32212254720 bytes 255 heads, 63 sectors/track, 3916 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0005210c Device Boot Start End Blocks Id System /dev/sda1 * 1 26 204800 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 26 1301 10240000 83 Linux /dev/sda3 1301 1497 1572864 82 Linux swap / Solaris /dev/sda4 1497 3916 19436582 83 Linux Command (m for help): wp #保存并退出,如果創(chuàng)建有誤,直接退出不要保存即可The partition table has been altered! Calling ioctl() to re-read partition table. WARNING: Re-reading the partition table failed with error 16: Device or resource busy. The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8) Syncing disks.
重新創(chuàng)建分區(qū)后,需要重啟一下;
[root@linuxprobe ~]# init 6 [root@linuxprobe ~]# e2fsck -f /dev/sda4 #檢查分區(qū)信息[root@linuxprobe ~]# resize2fs -p /dev/sda4 #調(diào)整分區(qū)大小
重新掛載、查看分區(qū)大小、數(shù)據(jù)
[root@linuxprobe ~]# mount /dev/sda4 /data [root@linuxprobe ~]# df -hT [root@linuxprobe ~]# cat /data/linuxprobe we are Linuxer
看完上述內(nèi)容,你們掌握centos中怎么使用fdisk擴(kuò)展分區(qū)容量大小的方法了嗎?如果還想學(xué)到更多技能或想了解更多相關(guān)內(nèi)容,歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道,感謝各位的閱讀!