Chad K
asked on
How do I extend an xfs partition across multiple disks in Redhat 8 / RockyLinux 8?
I need help extending a partition across 2 physical disks in a RockyLinux / Redhat 8 VM. I have a new installation which has a 50TB disk on /dev/sdb, this disk has a partition on it and is mounted to /data on the server. I would like to extend this partition to 100TB by adding an additional 50TB disk. I know there is a way to do this, but I always have trouble coming up with it. The necessary data I *think* is as follows:
[root@v-os-temp-repo ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 189G 0 189G 0% /dev
tmpfs 189G 0 189G 0% /dev/shm
tmpfs 189G 8.7M 189G 1% /run
tmpfs 189G 0 189G 0% /sys/fs/cgroup
/dev/mapper/rl-root 35G 2.6G 33G 8% /
/dev/sdb1 46T 325G 46T 1% /data
/dev/sda1 1014M 279M 736M 28% /boot
tmpfs 38G 0 38G 0% /run/user/0
[root@v-os-temp-repo ~]# fdisk -l
Disk /dev/sda: 40 GiB, 42949672960 bytes, 83886080 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: 0x5f8bb7da
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 2099199 2097152 1G 83 Linux
/dev/sda2 2099200 83886079 81786880 39G 8e Linux LVM
Disk /dev/sdb: 50 TiB, 54975581388800 bytes, 107374182400 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: gpt
Disk identifier: 28D2A095-4102-43FD-BA54-7BAC1A3130B9
Device Start End Sectors Size Type
/dev/sdb1 2048 97656250367 97656248320 45.5T Linux filesystem
Disk /dev/sdc: 50 TiB, 54975581388800 bytes, 107374182400 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 /dev/mapper/rl-root: 35 GiB, 37576769536 bytes, 73392128 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 /dev/mapper/rl-swap: 4 GiB, 4294967296 bytes, 8388608 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
So as you can see, I have a second 50TB disk on /dev/sdc and I would like to present the path /data with a single 100TB partition that spans /dev/sdb and /dev/sdc. The partition on /dev/sdb1 is formatted with xfs currently. How do I accomplish this?
ASKER
This is a virtual machine and both 50tb disks are just vmdks and look like a single physical disk to the OS. My underlying datastores in VMware are limited to 55tb each so I can’t extend the disk to the OS any larger than it is, so a second disk is my only option.
thought it was bare metal since you said you have 2 physical disks
even if you had more space in your data store, vmdk size limit is 62tb
the only way i can see stitching them together is to create a new volume group using sdc, move the 325gb to there, then delete sdb1 and expand the volume group to sdb
even if you had more space in your data store, vmdk size limit is 62tb
the only way i can see stitching them together is to create a new volume group using sdc, move the 325gb to there, then delete sdb1 and expand the volume group to sdb
ASKER
Sorry, I should have termed better. There is nothing I care about on sdb1. I can blow the whole thing away. How would I go about doing this with volume groups/lvm ? Just not a Linux guy so I don’t know the process.
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
OK so I used the guide to create a logical volume of 99T called "lv_data" in a volume group called "LVMvgData". Now how would I create a "partition" that would reside in the lv and use that space? I didnt create any partitions on the disks before using pvcreate, vgcreate, and lvcreate. Just raw new VMDK disks. Now Iogical volume, but I need to create a filesystem on it to use that 99T. I am not familiar with what is next? output of lvs looks like the following:
[root@v-os-temp-repo ~]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
lv_data LVMvgData -wi-a----- 99.00t
root rl -wi-ao---- <35.00g
swap rl -wi-ao---- 4.00g
ASKER
NVM, I think i got it. I missed the step where i needed to create a partition on the disks prior to pvcreate steps. I was able to create and format a logical volume the way I needed. Thanks for the link to get me going.
what is this disk? a hardware raid of some sort?
how to answer that would be based on the answer to the first question
if it is a hardware raid, can you not extend the array with the extra storage?