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- #!/bin/sh
- #
- # Workaround for certain power management misfeatures of some harddisks
- # Copyright (c) 2012-2020 Michael Buesch <m@bues.ch>
- # Licensed for any use.
- #
- # Regular expression of affected harddisk models
- # This regex matches on /sys/block/DISK/device/model
- models='(^EZRX)|(^HDS5C)|(^DT01ACA)|(2CX188)'
- block="$(hexdump -n 2 -e '/2 "%u"' /dev/urandom)"
- for disk in /dev/hd? /dev/sd?; do
- [ -b "$disk" ] || continue
- base="$(basename "$disk")"
- grep -qEe "$models" "/sys/block/$base/device/model" || continue
- # echo "Poking $disk block $block"
- dd if="$disk" of=/dev/null bs=512 count=1 skip="$block" >/dev/null 2>&1
- done
- exit 0
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