How many drives?

[Miner, Jonathan W (CSC) (US SSA)]

> Quick, and dirty...
>
> fdisk -l | grep '^Disk ' | wc -l
>
> This will fail to report correctly on systems with embedded hardware RAID
> controllers, also mis-counts on systems with software volume management.

This fixes the software volume management issue, only counts "hd" and "sd" devices:



fdisk -l | egrep '^Disk /dev/.*[hs]d' | wc -l
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