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CentOS 非LVM分区扩容根分区磁盘空间

liveJQ
2023-07-21 / 0 评论 / 0 点赞 / 364 阅读 / 4,035 字 / 正在检测是否收录...
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查看分区容量

[root@Cnyunwei ~]# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sr0     11:0    1 1024M  0 rom  
sda      8:0    0  250G  0 disk 
├─sda1   8:1    0  512M  0 part /boot
├─sda2   8:2    0    4G  0 part [SWAP]
└─sda3   8:3    0 65.5G  0 part /

尝试使用lv命令失败,非LVM分区

[root@Cnyunwei ~]# lvextend -l +100%FREE /dev/sda3
  Path required for Logical Volume "sda3".
  Please provide a volume group name
  Run `lvextend --help' for more information.

查看磁盘详细信息

[root@Cnyunwei ~]# fdisk -l

Disk /dev/sda: 268.4 GB, 268435456000 bytes
255 heads, 63 sectors/track, 32635 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: 0x0004b166

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          66      524288   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              66         588     4194304   82  Linux swap / Solaris
Partition 2 does not end on cylinder boundary.
/dev/sda3             588        9138    68680704   83  Linux

重建磁盘起始扇区

[root@Cnyunwei ~]# 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

Disk /dev/sda: 268.4 GB, 268435456000 bytes
255 heads, 63 sectors/track, 32635 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: 0x0004b166

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          66      524288   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              66         588     4194304   82  Linux swap / Solaris
Partition 2 does not end on cylinder boundary.
/dev/sda3             588        9138    68680704   83  Linux

Command (m for help): m
Command action
   a   toggle a bootable flag
   b   edit bsd disklabel
   c   toggle the dos compatibility flag
   d   delete a partition
   l   list known partition types
   m   print this menu
   n   add a new partition
   o   create a new empty DOS partition table
   p   print the partition table
   q   quit without saving changes
   s   create a new empty Sun disklabel
   t   change a partition's system id
   u   change display/entry units
   v   verify the partition table
   w   write table to disk and exit
   x   extra functionality (experts only)

Command (m for help): d
Partition number (1-4): 4
Warning: partition 4 has empty type

Command (m for help): 3
3: unknown command
Command action
   a   toggle a bootable flag
   b   edit bsd disklabel
   c   toggle the dos compatibility flag
   d   delete a partition
   l   list known partition types
   m   print this menu
   n   add a new partition
   o   create a new empty DOS partition table
   p   print the partition table
   q   quit without saving changes
   s   create a new empty Sun disklabel
   t   change a partition's system id
   u   change display/entry units
   v   verify the partition table
   w   write table to disk and exit
   x   extra functionality (experts only)

Command (m for help): d
Partition number (1-4): 3

Command (m for help): d
Partition number (1-4): 3
Warning: partition 3 has empty type

Command (m for help): u
Changing display/entry units to sectors

Command (m for help): u
Changing display/entry units to cylinders

Command (m for help): p

Disk /dev/sda: 268.4 GB, 268435456000 bytes
255 heads, 63 sectors/track, 32635 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: 0x0004b166

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          66      524288   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              66         588     4194304   82  Linux swap / Solaris
Partition 2 does not end on cylinder boundary.

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 3
First cylinder (588-32635, default 588): 588
Last cylinder, +cylinders or +size{K,M,G} (588-32635, default 32635): 32635

Command (m for help): wr
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: 设备或资源忙.
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.
You have mail in /var/spool/mail/root
[root@Cnyunwei ~]# df -hl
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda3        65G   53G  8.6G  87% /
tmpfs           3.9G     0  3.9G   0% /dev/shm
/dev/sda1       488M   45M  419M  10% /boot
[root@Cnyunwei ~]# init 6

刷新磁盘空间

[root@Cnyunwei ~]# resize2fs /dev/sda3
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/sda3 is mounted on /; on-line resizing required
old desc_blocks = 5, new_desc_blocks = 16
Performing an on-line resize of /dev/sda3 to 64355255 (4k) blocks.
The filesystem on /dev/sda3 is now 64355255 blocks long.

[root@Cnyunwei ~]# df -hl
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda3       242G   53G  177G  23% /
tmpfs           3.9G     0  3.9G   0% /dev/shm
/dev/sda1       488M   45M  419M  10% /boot
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