fdisk默认只能格式小于2T的磁盘，我们经常会碰到大于2T的磁盘，我们不能fdisk 格式化。
我们得用parted 来的格式化
parted 命令可能没有，yum install -y parted
真实例子：
[root@ES-TY01 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTsdb 8:16 0 9.1T 0 disk └─sdb1 8:17 0 9.1T 0 part sdc 8:32 0 9.1T 0 disk └─sdc1 8:33 0 9.1T 0 part sdf 8:80 0 9.1T 0 disk └─sdf1 8:81 0 9.1T 0 part sde 8:64 0 9.1T 0 disk └─sde1 8:65 0 9.1T 0 part sdg 8:96 0 9.1T 0 disk └─sdg1 8:97 0 9.1T 0 part sda 8:0 0 446.6G 0 disk ├─sda1 8:1 0 700M 0 part /boot/efi├─sda2 8:2 0 100M 0 part ├─sda3 8:3 0 2G 0 part ├─sda4 8:4 0 500M 0 part /boot└─sda5 8:5 0 443.4G 0 part ├─VolGroup-lv_root (dm-0) 253:0 0 50G 0 lvm / ├─VolGroup-lv_swap (dm-1) 253:1 0 4G 0 lvm [SWAP] └─VolGroup-lv_home (dm-2) 253:2 0 389.4G 0 lvm /homesdh 8:112 0 9.1T 0 disk └─sdh1 8:113 0 9.1T 0 part sdd 8:48 0 9.1T 0 disk sdi 8:128 0 9.1T 0 disk └─sdi1 8:129 0 9.1T 0 part sdj 8:144 0 9.1T 0 disk └─sdj1 8:145 0 9.1T 0 part sdk 8:160 0 9.1T 0 disk └─sdk1 8:161 0 9.1T 0 part sdl 8:176 0 9.1T 0 disk └─sdl1 8:177 0 9.1T 0 part sdm 8:192 0 9.1T 0 disk └─sdm1 8:193 0 9.1T 0 part
我们看到sdd还没格式化：
[root@ES-TY01 ~]# parted /dev/sddGNU Parted 2.1Using /dev/sddWelcome to GNU Parted! Type 'help' to view a list of commands.(parted) p Model: DELL PERC H730P Mini (scsi)Disk /dev/sdd: 10.0TBSector size (logical/physical): 512B/4096BPartition Table: gptNumber Start End Size File system Name Flags(parted) mkpart Partition name? []? sdd1 File system type? [ext2]? ext4 Start? 0 End? 10.0TB Warning: The resulting partition is not properly aligned for best performance.Ignore/Cancel? Ignore (parted) p Model: DELL PERC H730P Mini (scsi)Disk /dev/sdd: 10.0TBSector size (logical/physical): 512B/4096BPartition Table: gptNumber Start End Size File system Name Flags 1 17.4kB 10.0TB 10.0TB sdd1(parted) quit Information: You may need to update /etc/fstab.
[root@ES-TY02 ~]# mkfs.ext4 /dev/sde1mke2fs 1.41.12 (17-May-2010)/dev/sde1 alignment is offset by 3072 bytes.This may result in very poor performance, (re)-partitioning suggested.Filesystem label=OS type: LinuxBlock size=4096 (log=2)Fragment size=4096 (log=2)Stride=1 blocks, Stripe width=0 blocks610369536 inodes, 2441478135 blocks122073906 blocks (5.00%) reserved for the super userFirst data block=0Maximum filesystem blocks=429496729674508 block groups32768 blocks per group, 32768 fragments per group8192 inodes per groupSuperblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 102400000, 214990848, 512000000, 550731776, 644972544, 1934917632Writing inode tables: done Creating journal (32768 blocks): doneWriting superblocks and filesystem accounting information: doneThis filesystem will be automatically checked every 22 mounts or180 days, whichever comes first. Use tune2fs -c or -i to override.
一个10T的磁盘，最终大小的SIZE 大约是9T,Avail SIZE 是8.5T,所以相当于损失1.5T，可用率是85%。
[root@hdp08 ~]# df -ThFilesystem Type Size Used Avail Use% Mounted on/dev/mapper/VolGroup-lv_root ext4 50G 6.5G 41G 14% /tmpfs tmpfs 127G 36K 127G 1% /dev/shm/dev/sda4 ext4 477M 40M 413M 9% /boot/dev/sda1 vfat 696M 304K 696M 1% /boot/efi/dev/mapper/VolGroup-lv_home ext4 384G 67M 364G 1% /home/dev/sdb1 ext4 9.0T 29G 8.5T 1% /cloud/data01/dev/sdc1 ext4 9.0T 29G 8.5T 1% /cloud/data02/dev/sdd1 ext4 9.0T 30G 8.5T 1% /cloud/data03/dev/sde1 ext4 9.0T 28G 8.5T 1% /cloud/data04/dev/sdf1 ext4 9.0T 32G 8.5T 1% /cloud/data05/dev/sdg1 ext4 9.0T 32G 8.5T 1% /cloud/data06/dev/sdh1 ext4 9.0T 32G 8.5T 1% /cloud/data07/dev/sdi1 ext4 9.0T 32G 8.5T 1% /cloud/data08/dev/sdj1 ext4 9.0T 33G 8.5T 1% /cloud/data09/dev/sdk1 ext4 9.0T 30G 8.5T 1% /cloud/data10/dev/sdl1 ext4 9.0T 26G 8.5T 1% /cloud/data11/dev/sdm1 ext4 9.0T 28G 8.5T 1% /cloud/data12