adding free space to LVM
I replaced 146GB drives with 300GB drives in a HP server and extended the Raid 5 partition using HP smart array manager. I now have a 900GB HP Raid array logical volume and want to use the free space in CentOS 7 with LVM.
I want to allocate the free space to my home filesystem. What is the best way to accomplish this? I thought about trying to use fdisk to change the ending sector for partition 2 to have it end at 900 instead of 450. I know I could create a new partition with the free space and add it to the LVM group. Then add that to the filesystem. I'm not sure what is the best approach so thought I would ask the group. Thanks!
This is the output of parted and fdisk.
[root@jpvmserver ~]# parted
GNU Parted 3.1
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print devices
/dev/sda (900GB)
/dev/mapper/centos_jpvmserver-home (367GB)
/dev/mapper/centos_jpvmserver-swap (34.4GB)
/dev/mapper/centos_jpvmserver-root (26.8GB)
(parted) print free
Model: HP LOGICAL VOLUME (scsi)
Disk /dev/sda: 900GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
32.3kB 1049kB 1016kB Free Space
1 1049kB 2149MB 2147MB primary ext3 boot
2 2149MB 430GB 428GB primary lvm
430GB 900GB 470GB Free Space
(parted) q
[root@jpvmserver ~]# fdisk -l
Disk /dev/sda: 899.9 GB, 899898718208 bytes, 1757614684 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: 0x00050878
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 4196351 2097152 83 Linux
/dev/sda2 4196352 840550399 418177024 8e Linux LVM
Disk /dev/mapper/centos_jpvmserver-root: 26.8 GB, 26843545600 bytes, 52428800 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/centos_jpvmserver-swap: 34.4 GB, 34359738368 bytes, 67108864 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/centos_jpvmserver-home: 367.0 GB, 367001600000 bytes, 716800000 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
Comments
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Check this one out: http://forums.fedoraforum.org/showthread.php?t=269774
Please, make sure you have backups before that. There is a way of backing up the partition table with gdisk. Look into it so you can restore it if anything goes wrong.
0 -
You need to use LVM to add this new disk to your volume group and then you can extend your logical volume.
0
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