我有一台 CentOS 7 的服务器，使用 LUN 来存储数据。最近Storage团队扩展了LUN空间。这是多路径 -ll 的输出
~ # multipath -ll
mpathc (3600601606cb04000a0eb35b80750eb11) dm-5 DGC ,VRAID
**size=27T** features='2 queue_if_no_path retain_attached_hw_handler' hwhandler='1 alua' wp=rw
|-+- policy='service-time 0' prio=50 status=active
| |- 1:0:0:2 sdl 8:176 active ready running
| `- 4:0:0:2 sdn 8:208 active ready running
`-+- policy='service-time 0' prio=10 status=enabled
|- 1:0:1:2 sdm 8:192 active ready running
`- 4:0:2:2 sdo 8:224 active ready running
之前的大小为 20TB，现在已扩展到 27TB。
这是 fdisk 命令的输出
fdisk -l /dev/mapper/mpathc
WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.
Disk /dev/mapper/mpathc: 29686.8 GB, 29686813949952 bytes, 57982058496 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 4194304 bytes
Disk label type: gpt
Disk identifier: 843A6F7E-581A-455E-822F-2CE4306394BF
# Start End Size Type Name
1 8192 42949672926 20T Linux filesyste
您可以看到 LUN 的大小和扇区都增加了。这是 kpartx 命令的输出
kpartx -l /dev/mapper/mpathc
GPT:Primary header thinks Alt. header is not at the end of the disk.
GPT:Alternate GPT header not at the end of the disk.
GPT: Use GNU Parted to correct GPT errors.
mpathc1 : 0 42949664735 /dev/mapper/mpathc 8192
这是 df 命令的输出
df -h /dev/mapper/mpathc1
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/mpathc1 20T 17T 4.0T 81% /Splunk-Storage/COLD
所以我不知道如何在不丢失数据的情况下扩展 /dev/mapper/mpathc1 的空间。我非常感谢任何建议提前谢谢