[Linux] HDD 추가하기(LVM)

# fdisk -l
Disk /dev/sda: 250.1 GB, 250059350016 bytes, 488397168 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: dos
Disk identifier: 0x0003c1b5

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     4196351     2097152   83  Linux
/dev/sda2         4196352   488396799   242100224   8e  Linux LVM

Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes, 1953525168 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



# fdisk /dev/sdb
Welcome 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): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p
Partition number (1-4, default 1): 엔터
First sector (2048-1953525167, default 2048): 엔터
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-1953525167, default 1953525167): 엔터
Using default value 1953525167
Partition 1 of type Linux and of size 931.5 GiB is set

Command (m for help): p

Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes, 1953525168 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: dos
Disk identifier: 0x000167a6

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048  1953525167   976761560   83  Linux

Command (m for help): t
Selected partition 1
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'

Command (m for help): p

Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes, 1953525168 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: dos
Disk identifier: 0x000167a6

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048  1953525167   976761560   8e  Linux LVM

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

# pvcreate /dev/sdb1
WARNING: dos signature detected on /dev/sdb1 at offset 510. Wipe it? [y/n]: y
  Wiping dos signature on /dev/sdb1.
  Physical volume "/dev/sdb1" successfully created.
  
# pvdisplay
  --- Physical volume ---
  ...
   
  "/dev/sdb1" is a new physical volume of "931.51 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/sdb1
  VG Name               
  PV Size               931.51 GiB
  Allocatable           NO
  PE Size               0   
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               TPAgt6-V2Ii-83Li-9Pq4-Q0Yh-FNmL-1ycugC
   
# vgcreate centosvg1 /dev/sdb1
  Volume group "centosvg1" successfully created
  
# vgdisplay
  --- Volume group ---
  ...
   
  --- Volume group ---
  VG Name               centosvg1
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  1
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                0
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <931.51 GiB
  PE Size               4.00 MiB
  Total PE              238466
  Alloc PE / Size       0 / 0   
  Free  PE / Size       238466 / <931.51 GiB
  VG UUID               fQLwXp-zAMV-KsOf-e0I3-LnXj-W0hn-5Treji
   
# lvcreate -n data001 -l100%FREE centosvg1
  Logical volume "data001" created.

  (용량 명시하여 할당시 -L 옵션 사용, # lvcreate -n data001 -L100GB centosvg1)


# lvdisplay
  --- Logical volume ---
  ...
   
  --- Logical volume ---
  LV Path                /dev/centosvg1/data001
  LV Name                data001
  VG Name                centosvg1
  LV UUID                LrNpVH-XirB-kGLg-7I3n-ZAdp-lvUW-2lP1a3
  LV Write Access        read/write
  LV Creation host, time localhost, 2020-03-10 03:00:39 +0900
  LV Status              available
  # open                 0
  LV Size                <931.51 GiB
  Current LE             238466
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:8
   
# mkfs.xfs /dev/centosvg1/data001
meta-data=/dev/centosvg1/data001 isize=512    agcount=4, agsize=61047296 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0, sparse=0
data     =                       bsize=4096   blocks=244189184, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal log           bsize=4096   blocks=119233, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

# cd /
# mkdir /data001

# mount -t xfs /dev/centosvg1/data001 /data001

# df -kP
Filesystem                    1024-blocks     Used Available Capacity Mounted on
...
/dev/mapper/centosvg1-data001   976279804    32992 976246812       1% /data001

# pvdisplay
  --- Physical volume ---
  ...
   
  --- Physical volume ---
  PV Name               /dev/sdb1
  VG Name               centosvg1
  PV Size               931.51 GiB / not usable 4.71 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              238466
  Free PE               0
  Allocated PE          238466
  PV UUID               TPAgt6-V2Ii-83Li-9Pq4-Q0Yh-FNmL-1ycugC
  
# vi /etc/fstab
/dev/mapper/centosvg1-data001   /data001      xfs   defaults      0 0
: 추가후 저장

 

요약정리: 파티션 생성(fdisk) -> PV 생성 -> VG 생성 -> LV 생성 -> 파일시스템 생성(mkfs) -> mount point 생성 -> mount -> 파일시스템 테이블 추가 (삭제 및 제거는 역순)

 

특이사항 참고: http://saintrv.egloos.com/v/2734571

코딩 공작소 : LVM 하드 추가하기 (새로 추가하는게 아니라 사용하던 하드 추가)