fdisk默認只能格式小於2T的磁盤，我們經常會碰到大於2T的磁盤，我們不能fdisk 格式化。
我們得用parted 來的格式化
parted 命令可能沒有，yum install -y parted
真實例子：
[root@ES-TY01 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sdb 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 /home sdh 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
我們看到sdd還沒格式化：
[root@ES-TY01 ~]# parted /dev/sdd GNU Parted 2.1 Using /dev/sdd Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) p Model: DELL PERC H730P Mini (scsi) Disk /dev/sdd: 10.0TB Sector size (logical/physical): 512B/4096B Partition Table: gpt Number 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: 10.0TB Sector size (logical/physical): 512B/4096B Partition Table: gpt Number 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/sde1 mke2fs 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: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=1 blocks, Stripe width=0 blocks 610369536 inodes, 2441478135 blocks 122073906 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=4294967296
74508 block groups
32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock 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, 1934917632 Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 22 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override.
一個10T的磁盤，最終大小的SIZE 大約是9T,Avail SIZE 是8.5T,所以相當於損失1.5T，可用率是85%。
[root@hdp08 ~]# df -Th Filesystem 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