fsck on lvm can be a bit tricky. Like a the normal process, the partition needs to be umounted and we can boot up using the rescue cd or in emergency mode. Normally, you
fsck /dev/sda1
if the partition is lvm, you need to activate the lvm first like so
vgchange –ignorelockingfailure -ay
lvscan –ignorelockingfailure (this command should now [...]
Over the years, there were many attempts to find the best way to partition the hard disk or even the virtual machine. Do you need to have /var, /tmp, /usr…etc as separate partitions? Some people say it depends on what applications your server is running. If it is a mail server, maybe the /var might [...]
It is a good idea to backup the whole virtual machine to a separate machine to achieve redundancy. 99% uptime and full redundancy can be achieved using on-the-fly mirroring, ie network raid 1. Hardware and network performance will determine if this method will work or not. There are a few software that can achieve this. [...]
shrinking a lvm partition is straight forward if it doesn’t contain a partition table. Simply do a:
umount lvm_partition
resize2fs /dev/vg/lv newSize
lvresize -L disksize /dev/vg/lv
resize2fs /dev/vg/lv
execute the last command if nessary. Assuming you have a partition table in a 10G domU which uses the default partition table,
Disk /dev/xenvg/XenWeb: 10.5 GB, 10502537216 bytes
255 heads, 63 sectors/track, 1276 cylinders
Units [...]
Resizing a lvm partition is straight forward if it doesn’t contain a partition table. Simply do a:
lvresize -L disksize /dev/vg/lv
resize2fs /dev/vg/lv
If it is running a virtual machine like xen with a partition table, how to resize the domU, whether to shutdown domU or not depends largely on the partiton structure. In centos, if you do [...]
