linux - lv root drive full, how to extend partition? (centos)
2014-07
user3265051
my lv_root drive is full, i believe its 50gigs, i could not find an option to extend it when i installed centos..
i have installed a second drive where I have my /var/www which mounted fine
How can I increase/dev/mapper/vg_mycentos-lv_root parition without crashing my server? I cany do any more backups because i have no other disks left to back up (i live in very poor country) thank you in advance, i searched the issue a lot on here and each setup seems different and i dont want to crash the server deleting stuff Im not suppose to.
below is df results:
enter code here
[root@mycentos ~]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/vg_mycentos-lv_root 51606140 51589756 0 100% /
tmpfs 1943564 68 1943496 1% /dev/shm
/dev/sda1 495844 125974 344270 27% /boot
/dev/mapper/vg_mycentos-lv_home 905319440 80408528 778923280 10% /home
/dev/sdb1 961432232 221911100 690683124 25% /var/www
davidgo
One way you could do this (assuming you don't have any unused space) would be to shrink /home and allocated it to /
Shrinking a logical volume is harder then growing it (because of the filesystem), so you would want to back up first. You may be able to get away with the command "lvreduce --resizefs --size -100G /dev/mapper/vg_mycentos-lv_home to "free up" 100 gigs of space for the lvm. If this works, you can then grow the root lvm as follows:
lvextend -L+100G /dev/mapper/vg_mycentos-lv_root to extend the LV by 100 gigs, then resize4fs /dev/mapper/vg_mycentos-lv_root to grow the filesystem (this can be done online. Note that some OS's use resize2fs to resize ext4 partitions, so you might need to use that instead. This all assumes you are using EXT4 volumes - a reasonable, but not guaranteed assumption.
If you need to use /dev/sdb - you are going to need to:
- Copy /var/www to (for example) /home/var/www
- unmount /var/www
- Allocate /dev/sdb1 to the lvm (Something like pvcreate /dev/sdb1)
- Allocate the resource to the volume group (vgextend vg_mycentos /dev/sdb1)
- Use lvextend and resize2fs as above to grow the root partition.
- Move /home/var/www to /var/www (which is now in the LVM root partition)
You could - if you really wanted to - create another partition for /var/www and mount that using fstab rather then go through step 6.
jlego
I've got a box setup with Fedora 16 that I'm currently using for a small home server.
I was having some issues with samba sharing when I ran the disk usage analyzer and found that while I have a total of 5.9TB of total space (including external media disks) and only 853GB are being used, the root folder is still being reported as 100% full. It shows that the external media is taking up the majority of space.
I'm trying use the 3TB WD My Book for backups using Deja Dup, but anytime I try a backup, it throws and error saying I do not have enough disk space, which is not true, as less than 400GB worth of files are being backed up and the disk properties window reports that there are 2.8TB of space still free on the drive, which seems to contradict the disk usage analyzer's calculation of that drive being 60% full.
I've recently moved a lot of files around between the external and internal drives in order to reformat them and organize them into proper samba shares. I've emptied the trash and deleted trash folders off of the external drives. I've also run yum clean all. I've also got another problem where an iMac on the network can connect to the shares but cannot open them with an error that the files are in use by another user on the network, and I'm wondering if this problem with the disk usage is related or even causing that problem.
I've looked around on google and a somewhat common culprit identified as causing this problem has to do with inodes, but I'm not sure what that is or how to fix it.
This Question may be similar to my problem, but he does not elaborate on his answer very well.
Output of the df -h command as requested:
Filesystem Size Used Avail Use% Mounted on
rootfs 50G 4.9G 45G 10% /
devtmpfs 1.6G 0 1.6G 0% /dev
tmpfs 1.7G 560K 1.7G 1% /dev/shm
/dev/mapper/vg_tangentserver-lv_root 50G 4.9G 45G 10% /
tmpfs 1.7G 42M 1.6G 3% /run
tmpfs 1.7G 0 1.7G 0% /sys/fs/cgroup
tmpfs 1.7G 0 1.7G 0% /media
/dev/sdd2 497M 95M 378M 20% /boot
/dev/mapper/vg_tangentserver-lv_home 243G 229G 1.6G 100% /home
/dev/sdb1 466G 27M 466G 1% /media/VERBATIM
/dev/sdc1 917G 88G 783G 11% /media/SEAGATE
/dev/sde1 2.8T 391G 2.4T 14% /media/WD My Book
/dev/sdk1 917G 136G 736G 16% /media/LACIE
/dev/sda1 147G 147M 140G 1% /media/MAXTOR