Hello, sorry for the off-topic. Tipically when I work with LVM on Linux (RHEL/CentOS 5 and/or Fedora 11/12), I create the physical volume directly on the whole disk. Historically one created a partition on the disk, eventually big as the whole disk and then marked it as 8e type (LVM), and then the PV on the partition. With recent kernels/LVM2 user tools it became safe/normal to create it directly on disk device, and so I normally do.
What about same thing for ext3 filesystem? So creating for example an ext3 filesystem directly on the /dev/sda device? Does this imply any risk/problem? Does it change anything if the underlying device is instead managed by device-mapper-multipath, so for example the device name is /dev/mapper/mpath1? I ask because, used with creating PVs, VGs and LVs, today I had to create a plain filesystem on mpath device and forgot to create a partition on it but issued the mkfs command directly on it... and then mounted it... now I have this doubt Thanks in advance for any hints/ suggestions. Gianluca
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