fdisk不能直接修改分割槽起始
root@ubuntu18:~# parted
在虛擬機器中選擇u盤
(parted)
select /dev/sdb
列印現有分割槽
(parted) print
model: teclast coolflash usb3.0 (scsi)
disk /dev/sdb: 126gb
sector size (logical/physical): 512b/512b
partition table: msdos
disk flags:
number start end size type file system flags
1 32.8kb 126gb 126gb primary ntfs boot
規劃boot分割槽為fat，rootfs為ext3
resizepart number end resize partition number
修改第乙個分割槽大小
(parted) resizepart 1 1gb
warning: shrinking a partition can cause data loss, are you sure you want to continue?
yes/no? yes
(parted) print
model: teclast coolflash usb3.0 (scsi)
disk /dev/sdb: 126gb
sector size (logical/physical): 512b/512b
partition table: msdos
disk flags:
number start end size type file system flags
1 32.8kb 1000mb 1000mb primary ntfs boot
檢視幫助，只能修改標記，不能修改分割槽（檔案系統）格式
(parted)
help
setset number flag state change the flag on partition number
number is the partition number used by linux. on ms-dos disk labels, the primary partitions number from 1 to 4, logical
partitions from 5 onwards.
flag is one of: boot, root, swap, hidden, raid, lvm, lba, hp-service, palo, prep, msftres, bios_grub, atvrecv, diag, legacy_boot,
msftdata, irst, esp
state is one of: on, off
再建立另外乙個分割槽
(parted)
help mkpart
mkpart part-type [fs-type] start end make a partition
part-type is one of: primary, logical, extended
fs-type is one of: zfs, btrfs, nilfs2, ext4, ext3, ext2, fat32, fat16, hfsx, hfs+, hfs, jfs, swsusp, linux-swap(v1),
linux-swap(v0), ntfs, reiserfs, freebsd-ufs, hp-ufs, sun-ufs, xfs, apfs2, apfs1, asfs, amufs5, amufs4, amufs3, amufs2, amufs1,
amufs0, amufs, affs7, affs6, affs5, affs4, affs3, affs2, affs1, affs0, linux-swap, linux-swap(new), linux-swap(old)
start and end are disk locations, such as 4gb or 10%. negative values count from the end of the disk. for example, -1s specifies
exactly the last sector.
partition id.
(parted) mkpart primary ext3 1001mb -1s
(parted) print
model: teclast coolflash usb3.0 (scsi)
disk /dev/sdb: 126gb
sector size (logical/physical): 512b/512b
partition table: msdos
disk flags:
number start end size type file system flags
1 32.8kb 1000mb 1000mb primary ntfs boot
2 1001mb 126gb 125gb primary ext3 lba
(parted) quit 退出就直接儲存分割槽表了。
information: you may need to update /etc/fstab.
用fdisk驗證分割槽表已生效
root@ubuntu18:~# fdisk -l /dev/sdb
disk /dev/sdb: 117.2 gib, 125829120000 bytes, 245760000 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
disklabel type: dos
disk identifier: 0x00737281
device boot start end sectors size id type
/dev/sdb1 * 64 1953125 1953062 953.7m 7 hpfs/ntfs/exfat
/dev/sdb2 1955840 245759999 243804160 116.3g 83 linux
格式化2個分割槽
root@ubuntu18:~# mkfs.fat /dev/sdb1
mkfs.fat 4.1 (2017-01-24)
格式化之後，fdisk檢視type不會變化
root@ubuntu18:~# mkfs.ext3 /dev/sdb2
mke2fs 1.44.1 (24-mar-2018)
creating filesystem with 30475520 4k blocks and 7626752 inodes
filesystem uuid: 0ba05cdb-f604-4ef7-b76f-660412a152e9
superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872
allocating group tables: done
writing inode tables: done
creating journal (131072 blocks): done
writing superblocks and filesystem accounting information:
這個格式化特別慢，在虛擬機器下拔了幾次u盤，最終在windows下用diskgenius完成格式化，也差點拔u盤。
測試掛載正常
root@ubuntu18:~# mkdir /mnt/rootfs /mnt/boot
root@ubuntu18:~# mount /dev/sdb1 /mnt/boot
root@ubuntu18:~# mount /dev/sdb2 /mnt/rootfs
root@ubuntu18:~#
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