topic fdisk /dev/mapper/mpath1 or fdisk /dev/sda ? in Operating System - Linux

fdisk /dev/mapper/mpath1 or fdisk /dev/sda ?

Yaboto — Thu, 28 Jan 2010 13:37:04 GMT

Hi,

I have installed DM-Multipath on my RHEL5 to take care of the redundant SAN multipathing.
It is recommended to create and mark a partition as Linux LVM before "pvcreating" and "vgcreating" it.
Here is my question:

When "fdisking" the partition, which is the recommended device file to use ? the Multipath one /dev/mapper/mpath1 or the ordinary one /dev/sda ?

Regards,

Re: fdisk /dev/mapper/mpath1 or fdisk /dev/sda ?

skt_skt — Thu, 28 Jan 2010 13:48:43 GMT

all LVM operations need to be on mpathx. You can fdisk(just to list since LVM is there for disk management) on sda devices, but only primary path will respond( assumign u have an active/passive array)

Re: fdisk /dev/mapper/mpath1 or fdisk /dev/sda ?

dirk dierickx — Fri, 29 Jan 2010 07:04:26 GMT

forget about the sd[a-z] entries, your multipathed now, your disks are now accessable using the mpath name.

Re: fdisk /dev/mapper/mpath1 or fdisk /dev/sda ?

Yaboto — Fri, 29 Jan 2010 13:24:45 GMT

Thank you !