[EBS] 2TiB 이상 증설 안되는 이슈 해결방법

이슈

EBS 볼륨이 MBR 방식으로 파티셔닝 되어있어 2TiB 이상 증설이 불가능한 현상이 확인되었다.

에러문구

sudo growpart /dev/nvme1n1 1
WARNING: MBR/dos partitioned disk is larger than 2TB. Additional space will go unused.
NOCHANGE: partition 1 could only be grown by 33 [fudge=2048]

 

 

해결방안

#GPT 파티션 테이블을 검사
root@ip-10-200-12-222:~# gdisk -l /dev/nvme1n1 
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.
***************************************************************

Disk /dev/nvme1n1: 8388608000 sectors, 3.9 TiB
Logical sector size: 512 bytes
Disk identifier (GUID): 69EC9E7C-4564-4EBE-85F6-361907C0C708
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 8388607966
Partitions will be aligned on 2048-sector boundaries
Total free space is 4093642718 sectors (1.9 TiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048      4294967262   2.0 TiB     8300  Linux filesystem

 

# MBR(Master Boot Record) 파티션 테이블을 GPT 파티션 테이블로 변환
root@ip-10-200-12-222:~# sgdisk -g /dev/nvme1n1
***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format
in memory.
***************************************************************

The operation has completed successfully.

 

# 변환된 GPT 파티션 테이블을 검사
root@ip-10-200-12-222:logs# gdisk -l /dev/nvme1n1
GPT fdisk (gdisk) version 0.8.10

Partition table scan:
  MBR: protective
  BSD: not present
  APM: not present
  GPT: present

Found valid GPT with protective MBR; using GPT.
Disk /dev/nvme1n1: 8388608000 sectors, 3.9 TiB
Logical sector size: 512 bytes
Disk identifier (GUID): 2489F2B6-1CB1-4710-AEB8-EC89D1EB85C2
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 8388607966
Partitions will be aligned on 2048-sector boundaries
Total free space is 4093642718 sectors (1.9 TiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048      4294967262   2.0 TiB     8300  Linux filesystem

 

# 첫 번째 파티션(/dev/nvme1n1p1)의 크기를 늘려서 디스크의 남은 공간을 모두 사용하도록 확장
root@ip-10-200-12-222:~# growpart /dev/nvme1n1 1
[ 3409.283323]  nvme1n1: p1
CHANGED: partition=1 start=2048 old: size=4294965215 end=4294967263 new: size=6442448863 end=6442450911

root@ip-10-200-12-222:data# resize2fs /dev/nvme1n1p1
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/nvme1n1p1 is mounted on /data; on-line resizing required
old_desc_blocks = 256, new_desc_blocks = 500
The filesystem on /dev/nvme1n1p1 is now 1048575739 blocks long.

root@ip-10-200-12-222:data# df -hT
Filesystem     Type      Size  Used Avail Use% Mounted on
devtmpfs       devtmpfs  970M     0  970M   0% /dev
tmpfs          tmpfs     978M     0  978M   0% /dev/shm
tmpfs          tmpfs     978M  436K  977M   1% /run
tmpfs          tmpfs     978M     0  978M   0% /sys/fs/cgroup
/dev/nvme0n1p1 xfs        30G  4.4G   26G  15% /
overlay        overlay    30G  4.4G   26G  15% /var/lib/docker/overlay2/d27b8a70b59ea7254cdf791fbc496effa0829219e48c9c83e3d87b84eab594d8/merged
shm            tmpfs      64M     0   64M   0% /var/lib/docker/containers/440e8e0383bdd3221fbcb1503c9538d564e5253be39aebb4d63443e750ed7560/mounts/shm
tmpfs          tmpfs     196M     0  196M   0% /run/user/0
/dev/nvme1n1p1 ext4      3.9T  1.6T  2.2T  43% /data

 

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Reference

[1] Constraints on the size and configuration of an EBS volume https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/volume_constraints.html

[2] https://linux.die.net/man/8/gdisk

[3] https://linux.die.net/man/8/sgdisk

[4] https://repost.aws/knowledge-center/ec2-ubuntu-convert-mbr-to-gpt

[5] MBR vs GPT 차이점

https://4ddig.tenorshare.com/kr/hard-drive/mbr-vs-gpt.html#p3

[6] Convert an MBR disk into a GPT disk in Linux

https://medium.com/@ahmedmansouri/convert-an-mbr-disk-into-a-gpt-disk-in-linux-161ded50697a

Convert an MBR disk into a GPT disk in Linux