磁盘分区创建场景memo

来源：互联网发布：js立体饼状图插件编辑：程序博客网时间：2024/06/05 03:58

lvm操作之前，有时需要结合fdisk进行磁盘划分，这篇memo简单整理了一下从磁盘分区创建到lvm操作的的一个常见场景。

Step 1：使用fdik -l命令确认磁盘/dev/sda

确认之后发现仍然有很多待分配的磁盘空间

[root@liumiaocn ~]# fdisk -lDisk /dev/sda: 1997.2 GB, 1997159792640 bytes, 3900702720 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 262144 bytes / 524288 bytesDisk label type: dosDisk identifier: 0x000946f7   Device Boot      Start         End      Blocks   Id  System/dev/sda1   *        2048     2099199     1048576   83  Linux/dev/sda2         2099200   211818495   104859648   8e  Linux LVMDisk /dev/sdb: 2003.6 GB, 2003570876416 bytes, 3913224368 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 262144 bytes / 524288 bytesDisk label type: dosDisk identifier: 0x0005870f   Device Boot      Start         End      Blocks   Id  System/dev/sdb1            2048   209721343   104859648   8e  Linux LVM...[root@liumiaocn ~]#

Step 2：创建一个新的分区

[root@liumiaocn ~]# fdisk /dev/sdaWelcome to fdisk (util-linux 2.23.2).Changes will remain in memory only, until you decide to write them.Be careful before using the write command.Command (m for help): mCommand action   a   toggle a bootable flag   b   edit bsd disklabel   c   toggle the dos compatibility flag   d   delete a partition   g   create a new empty GPT partition table   G   create an IRIX (SGI) partition table   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): nPartition type:   p   primary (2 primary, 0 extended, 2 free)   e   extendedSelect (default p): pPartition number (3,4, default 3): First sector (211818496-3900702719, default 211818496): Using default value 211818496Last sector, +sectors or +size{K,M,G} (211818496-3900702719, default 3900702719): +200GPartition 3 of type Linux and of size 200 GiB is setCommand (m for help):

Step 3：设定类型：8e：Linux LVM

Command (m for help): tPartition number (1-3, default 3): Hex code (type L to list all codes): L0  Empty           24  NEC DOS         81  Minix / old Lin bf  Solaris         1  FAT12           27  Hidden NTFS Win 82  Linux swap / So c1  DRDOS/sec (FAT-2  XENIX root      39  Plan 9          83  Linux           c4  DRDOS/sec (FAT-3  XENIX usr       3c  PartitionMagic  84  OS/2 hidden C:  c6  DRDOS/sec (FAT-4  FAT16 <32M      40  Venix 80286     85  Linux extended  c7  Syrinx          5  Extended        41  PPC PReP Boot   86  NTFS volume set da  Non-FS data     6  FAT16           42  SFS             87  NTFS volume set db  CP/M / CTOS / .7  HPFS/NTFS/exFAT 4d  QNX4.x          88  Linux plaintext de  Dell Utility    8  AIX             4e  QNX4.x 2nd part 8e  Linux LVM       df  BootIt          9  AIX bootable    4f  QNX4.x 3rd part 93  Amoeba          e1  DOS access      a  OS/2 Boot Manag 50  OnTrack DM      94  Amoeba BBT      e3  DOS R/O         b  W95 FAT32       51  OnTrack DM6 Aux 9f  BSD/OS          e4  SpeedStor       c  W95 FAT32 (LBA) 52  CP/M            a0  IBM Thinkpad hi eb  BeOS fs         e  W95 FAT16 (LBA) 53  OnTrack DM6 Aux a5  FreeBSD         ee  GPT             f  W95 Ext'd (LBA) 54  OnTrackDM6      a6  OpenBSD         ef  EFI (FAT-12/16/10  OPUS            55  EZ-Drive        a7  NeXTSTEP        f0  Linux/PA-RISC b11  Hidden FAT12    56  Golden Bow      a8  Darwin UFS      f1  SpeedStor      12  Compaq diagnost 5c  Priam Edisk     a9  NetBSD          f4  SpeedStor      14  Hidden FAT16 <3 61  SpeedStor       ab  Darwin boot     f2  DOS secondary  16  Hidden FAT16    63  GNU HURD or Sys af  HFS / HFS+      fb  VMware VMFS    17  Hidden HPFS/NTF 64  Novell Netware  b7  BSDI fs         fc  VMware VMKCORE 18  AST SmartSleep  65  Novell Netware  b8  BSDI swap       fd  Linux raid auto1b  Hidden W95 FAT3 70  DiskSecure Mult bb  Boot Wizard hid fe  LANstep        1c  Hidden W95 FAT3 75  PC/IX           be  Solaris boot    ff  BBT            1e  Hidden W95 FAT1 80  Old Minix      Hex code (type L to list all codes): 8eChanged type of partition 'Linux' to 'Linux LVM'Command (m for help):

Step 4：w保存退出

Command (m for help): wThe partition table has been altered!Calling ioctl() to re-read partition table.WARNING: Re-reading the partition table failed with error 16: Device or resource busy.The kernel still uses the old table. The new table will be used atthe next reboot or after you run partprobe(8) or kpartx(8)Syncing disks.[root@liumiaocn ~]#

Step 5：执行 partprobe

[root@liumiaocn ~]# partprobe[root@liumiaocn ~]#

Step 6：确认结果

[root@liumiaocn ~]# fdisk -lDisk /dev/sda: 1997.2 GB, 1997159792640 bytes, 3900702720 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 262144 bytes / 524288 bytesDisk label type: dosDisk identifier: 0x000946f7   Device Boot      Start         End      Blocks   Id  System/dev/sda1   *        2048     2099199     1048576   83  Linux/dev/sda2         2099200   211818495   104859648   8e  Linux LVM/dev/sda3       211818496   631248895   209715200   8e  Linux LVMDisk /dev/sdb: 2003.6 GB, 2003570876416 bytes, 3913224368 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 262144 bytes / 524288 bytesDisk label type: dos...[root@liumiaocn ~]#

Step 7：创建pv

[root@liumiaocn ~]# pvcreate /dev/sda3  Physical volume "/dev/sda3" successfully created.[root@liumiaocn ~]#[root@liumiaocn ~]# pvdisplay -v /dev/sda3    Wiping internal VG cache    Wiping cache of LVM-capable devices  "/dev/sda3" is a new physical volume of "200.00 GiB"  --- NEW Physical volume ---  PV Name               /dev/sda3  VG Name                 PV Size               200.00 GiB  Allocatable           NO  PE Size               0     Total PE              0  Free PE               0  Allocated PE          0  PV UUID               ...[root@liumiaocn ~]#

Step 8：加入pv到vg中
使用vgs或者vgdisplay确认当前vg状态

[root@liumiaocn ~]# vgs  VG #PV #LV #SN Attr   VSize   VFree   cl   2   3   0 wz--n- 200.00g 18.00g[root@liumiaocn ~]#

扩展vg

[root@liumiaocn ~]# vgextend cl /dev/sda3  Volume group "cl" successfully extended[root@liumiaocn ~]#

确认结果

[root@liumiaocn ~]# vgs  VG #PV #LV #SN Attr   VSize   VFree    cl   3   3   0 wz--n- 400.00g 218.00g[root@liumiaocn ~]#

Step 9：扩展lv
使用lvextend进行扩展

[root@liumiaocn ~]# lvs  LV   VG Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert  home cl -wi-ao---- 100.00g                                                      root cl -wi-ao----  50.00g                                                      swap cl -wi-ao----  32.00g                                                    [root@liumiaocn ~]# lvextend -L+200G cl/root  Size of logical volume cl/root changed from 50.00 GiB (12800 extents) to 250.00 GiB (64000 extents).  Logical volume cl/root successfully resized.[root@liumiaocn ~]# lvs  LV   VG Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert  home cl -wi-ao---- 100.00g                                                      root cl -wi-ao---- 250.00g                                                      swap cl -wi-ao----  32.00g                                                    [root@liumiaocn ~]#

Step 10： xfs_growfs
需要使用 xfs_growfs使其起效

确认之后仍然没有起效

[root@liumiaocn ~]# df /Filesystem          1K-blocks     Used Available Use% Mounted on/dev/mapper/cl-root  52399104 46560860   5838244  89% /[root@liumiaocn ~]#

对lv进行xfs_growfs操作

[root@liumiaocn ~]# xfs_growfs /dev/mapper/cl-rootmeta-data=/dev/mapper/cl-root    isize=512    agcount=16, agsize=819136 blks         =                       sectsz=512   attr=2, projid32bit=1         =                       crc=1        finobt=0 spinodes=0data     =                       bsize=4096   blocks=13106176, imaxpct=25         =                       sunit=64     swidth=128 blksnaming   =version 2              bsize=4096   ascii-ci=0 ftype=1log      =internal               bsize=4096   blocks=6400, version=2         =                       sectsz=512   sunit=64 blks, lazy-count=1realtime =none                   extsz=4096   blocks=0, rtextents=0data blocks changed from 13106176 to 65536000[root@liumiaocn ~]#[root@liumiaocn ~]# df /Filesystem          1K-blocks     Used Available Use% Mounted on/dev/mapper/cl-root 262118400 46564016 215554384  18% /[root@liumiaocn ~]#

阅读全文

0 0