[root@myhost01 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 17G 13G 3.4G 79% / /dev/sda1 99M 43M 52M 45% /boot tmpfs 943M 0 943M 0% /dev/shm [root@myhost01 ~]# [root@myhost01 ~]# [root@myhost01 ~]# fdisk /dev/sdd Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS […]

Converting a root filesystem is a bit more tricky because you cannot unmount it, as your system is running on it. Nevertheless it is still possible to do it without using an external bootable media. You should do this in a single-user mode.

First step is to modify your /etc/fstab file to say “ext4” […]

Now changing the ext3 FS to the ext4 FS type depends on the Requirement. =========================================================================

=====>> check the fs type by the below information

[root@servername ~]# mount | grep -i media

/dev/mapper/vg3-media1 on /media type ext3 (rw)

=====>> also check in the fstab file

[root@servername ~]# cat /etc/fstab /dev/vg0/root […]

krishbe$ multipath -ll mpath2 (360060480000190102091533030453034) dm-2 EMC,SYMMETRIX [size=30G][features=0][hwhandler=0][rw] \_ round-robin 0 [prio=2][active] \_ 0:0:0:112 sdd 8:48 [active][ready] \_ 3:0:0:112 sdg 8:96 [active][ready] mpath1 (360060480000190102091533030453033) dm-1 EMC,SYMMETRIX [size=30G][features=0][hwhandler=0][rw] \_ round-robin 0 [prio=2][active] \_ 0:0:0:111 sdc 8:32 [active][ready] \_ 3:0:0:111 sdf 8:80 [active][ready] mpath0 (360060480000190102091533030303830) dm-0 EMC,SYMMETRIX [size=2.8M][features=0][hwhandler=0][ro] \_ round-robin 0 [prio=2][active] \_ 0:0:0:0 sda 8:0 [active][ready] […]

In the traditional disk partitioning scheme, administrators plan ahead the use of each partition. For instance, a laptop with 120 GB hard drive, 1 GB RAM can have the following partition scheme:

1 GB for swap (/dev/sda1), 12 GB for root (/dev/sda2), 107 GB for /home (/dev/sda3), meaning, the remaining space.

So far so […]