##提示，磁盘操作先进行备份哦
扩展1:
Linux centos系统如何查看磁盘分区类型时MBR还是GPT：
执行 fdisk -l 或者 parted -l 命令查看，如果是msdos 或者dos 则是MBR分区；如果是gpt,毋庸置疑是GPT分区
扩展2：
1 2 | (parted) mkpart primary 17.2GB 100% Error: partition length of 6257901568 sectors exceeds the msdos-partition-table-imposed maximum of 4294967295 |
报错原因：分区格式为MBR，最大支持2TB，实际剩余空间大于2TB
今天对一个3T的磁盘进行分区，出现以下提示：
1 2 3 4 5 6 | [root@localhost ~]# fdisk /dev/sda WARNING: The size of this disk is 3.2 TB (3221225472000 bytes). DOS partition table format can not be used on drives for volumes larger than (2199023255040 bytes) for 512-byte sectors. Use parted(1) and GUID partition table format (GPT) |
当利用fdisk 进行磁盘分区时，由于MBR分区类型的磁盘最大支持2TB，当大于2TB，只会分配2T的空间，此时会面临以下问题：
1.将剩余空间再进行分区，这样方法可行，但是管理起来麻烦
2.将MBR分区转化为GPT分区，然后利用 parted 命令（parted /dev/sdb mklabel gpt）可修改磁盘分区格式，对于新增的磁盘来说这样方式似乎可行，但是我这里服务器只有一个盘 /dev/sda，直接进行数据将重置磁盘数据具有数据丢失风险
进行了一大堆百度后发现gdisk 这个命令完美解决fdisk 命令的缺点，
1 | yum install -y gdisk |
直接贴操作如下，
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | [root@localhost ~]# gdisk /dev/sda GPT fdisk (gdisk) version 0.8.10 Partition table scan: MBR: MBR only BSD: not present APM: not present GPT: not present *************************************************************** Found invalid GPT and valid MBR; converting MBR to GPT format in memory. THIS OPERATION IS POTENTIALLY DESTRUCTIVE! Exit by typing 'q' if you don't want to convert your MBR partitions to GPT format! *************************************************************** Command (? for help): p Disk /dev/sda: 6291456000 sectors, 2.9 TiB Logical sector size: 512 bytes Disk identifier (GUID): CB05B9CF-BD96-44B8-924A-24A0F0C50E0F Partition table holds up to 128 entries First usable sector is 34, last usable sector is 6291455966 Partitions will be aligned on 2048-sector boundaries Total free space is 2385207229 sectors (1.1 TiB) Number Start (sector) End (sector) Size Code Name 1 2048 2099199 1024.0 MiB 8300 Linux filesystem 2 2099200 33554431 15.0 GiB 8E00 Linux LVM 3 33554432 3906250751 1.8 TiB 8300 Linux filesystem Command (? for help): d Partition number (1-3): 3 Command (? for help): p Disk /dev/sda: 6291456000 sectors, 2.9 TiB Logical sector size: 512 bytes Disk identifier (GUID): CB05B9CF-BD96-44B8-924A-24A0F0C50E0F Partition table holds up to 128 entries First usable sector is 34, last usable sector is 6291455966 Partitions will be aligned on 2048-sector boundaries Total free space is 6257903549 sectors (2.9 TiB) Number Start (sector) End (sector) Size Code Name 1 2048 2099199 1024.0 MiB 8300 Linux filesystem 2 2099200 33554431 15.0 GiB 8E00 Linux LVM Command (? for help): n Partition number (3-128, default 3): First sector (34-6291455966, default = 33554432) or {+-}size{KMGTP}: Last sector (33554432-6291455966, default = 6291455966) or {+-}size{KMGTP}: Current type is 'Linux filesystem' Hex code or GUID (L to show codes, Enter = 8300): p Hex code or GUID (L to show codes, Enter = 8300): 8e Exact type match not found for type code 008E; assigning type code for 'Linux filesystem' Changed type of partition to 'Linux filesystem' Command (? for help): p Disk /dev/sda: 6291456000 sectors, 2.9 TiB Logical sector size: 512 bytes Disk identifier (GUID): CB05B9CF-BD96-44B8-924A-24A0F0C50E0F Partition table holds up to 128 entries First usable sector is 34, last usable sector is 6291455966 Partitions will be aligned on 2048-sector boundaries Total free space is 2014 sectors (1007.0 KiB) Number Start (sector) End (sector) Size Code Name 1 2048 2099199 1024.0 MiB 8300 Linux filesystem 2 2099200 33554431 15.0 GiB 8E00 Linux LVM 3 33554432 6291455966 2.9 TiB 8300 Linux filesystem Command (? for help): w Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING PARTITIONS!! Do you want to proceed? (Y/N): Y OK; writing new GUID partition table (GPT) to /dev/sda. Warning: The kernel is still using the old partition table. The new table will be used at the next reboot. The operation has completed successfully. [root@ITP172023017249 ~]# gdisk -l GPT fdisk (gdisk) version 0.8.10 Problem opening -l for reading! Error is 2. The specified file does not exist! [root@ITP172023017249 ~]# fdisk -l WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion. Disk /dev/sda: 3221.2 GB, 3221225472000 bytes, 6291456000 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: gpt # Start End Size Type Name 1 2048 2099199 1G Linux filesyste Linux filesystem 2 2099200 33554431 15G Linux LVM Linux LVM 3 33554432 6291455966 2.9T Linux filesyste Linux filesystem Disk /dev/mapper/cl-root: 14.4 GB, 14382268416 bytes, 28090368 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/cl-swap: 1719 MB, 1719664640 bytes, 3358720 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes [root@localhost~]# |