/usr/lib/fai/fai-disk-info is in fai-setup-storage 5.0.3ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | #! /bin/sh
### BEGIN SUBROUTINE INFO
# Provides-Var: none
# Requires-Var: none
# Short-Description: <task desc.>
### END SUBROUTINE INFO
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
checkdisk() {
while read major minor blocks device suffix; do
isdisk=1
# skip ide cdrom
[ -f /proc/ide/$device/media ] && grep -q cdrom /proc/ide/$device/media && isdisk=0
# old way of detecting disks: [ `cat /sys/block/$device/removable` -eq 1 ] && isdisk=0
[ `stat -c %G /dev/$device` = "disk" ] || isdisk=0
[ $isdisk -eq 1 ] && echo "$device"
done
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# echo a space separated list of devices and their block size
egrep ' etherd/e[[:digit:]]+\.[[:digit:]]+\b| i2o/hd.+\b| cciss/c.+d.+\b| ida/c.+d.+\b| rd/c.+d.+\b| fio.\b| hd.\b| sd[a-z]{1,2}\b|/disc\b| vd.\b| xvd.\b| nvme[[:digit:]]n1$' /proc/partitions | checkdisk
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