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63 lines
1.5 KiB
Bash
63 lines
1.5 KiB
Bash
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#!/bin/bash
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# 2021 Dave Bechtel
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# Get me a set of disks for DRAID
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# DONE [b..y] a[a..x] get slices of X disks and be able to verify with wc -w
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# REF: https://tldp.org/LDP/abs/html/arrays.html
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# regular array - STARTS AT 0
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declare -a fullset=(sd{b..y} sda{a..x} sdb{a..x} sdc{a..x}) # Total 96, excluding spares
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# sdz, sday sdaz, sdby sdbz, sdcy sdcz == Reserved for spares (7)
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# integer
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declare -i howmany sliceby idx x
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function slice () {
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howmany=$1
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sliceby=$2
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idx=0
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for x in $(seq 0 1 $howmany); do
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[ $x -ge $howmany ] && break
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let idx=$idx+1
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# echo -n "${fullset[$idx]} "
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printf "${fullset[$x]} " # no newline
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if [ $idx -ge $sliceby ]; then
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echo ' \'
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idx=0
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fi
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done
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echo ''
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}
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if [ "$1" = "" ]; then
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# Demo
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# copypasta not-including the '\' and verify with: echo '[paste]' |wc -w
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slice 72 72
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echo '===== ^^ 72 / 72'
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slice 72 36
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echo '===== ^^ 72 / 36'
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slice 72 24
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echo '===== ^^ 72 / 24'
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# = sd{b..y} sda{a..l} \
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#sda{m..x} sdb{a..x}
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exit; # early
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fi
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# Basic sanity
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if [ "$1" -lt "$2" ]; then
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echo "$0 - Failed sanity check, \$2 must be greater than \$1"
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exit 999; # Somebody call Scotland Yard, we have a violation
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fi
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slice $1 $2
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# This is a decent method because we can give it arbitrary numbers of disks (up to total defined)
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# and divide as needed; try 26 2, 24 2, 32 4, 32 8
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# NOTE all output lines should have the same length - if you dont you wont have a balanced set of disks
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# e.g. 32 6 = invalid config (32 4 = valid) but we just give you output - sanity checks are up 2U
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