Yashpal Nagar wrote:
> This time P400 appearing as c1d0 and P800 as c0d0 during installation.

Many drivers let you lock down pciid's or devices by name, look at the 
driver for your controller for more info

> Does anyone know what can cause this device name to swap, & how does
> it effect server in case it happens again? I have allocated everything
> under LVM2 except (/) file system,  / is at c1d0p1 now.

if its all under lvm, that will just work, it will recognise and handle 
the metadata properly even if the drive order flips.

Easy way to test this is using usb keys. get 2 of them insert them in 
some order,  pvcreate, vgcreate, allocate to a lv. then shutdown and 
remove the drives. bring the machine back up, reinsert in 'different 
order', pvscan; check for results.

- KB

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