79 lines
2.1 KiB
Bash
79 lines
2.1 KiB
Bash
#!/bin/bash
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#sources:
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#https://wiki.archlinux.org/title/bcache
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#https://stackoverflow.com/questions/20797819/command-to-change-the-default-home-directory-of-a-user
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#https://unix.stackexchange.com/questions/156102/optimizing-bcache
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#https://evilpiepirate.org/git/linux-bcache.git/tree/Documentation/bcache.txt
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#Block device for caching (e.g. disk or partition):
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ssddev=/dev/sdb
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#Block device to use with cache:
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hdddev=/dev/sdc
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#Name of the mounted device:
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mountname=/mnt/bcache
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#Cache setting for sequential writes
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#There is an issue with parsing prefixes, max 4 GB, use 0 for no cutoff
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sequential_cutoff=0
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set -e
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if [ "$EUID" -ne 0 ]; then
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echo "Please run as root"
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exit
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fi
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read -p "Block devices $ssddev and $hdddev will be wiped, are you sure proceed?" -n 1 -r
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echo
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if [[ ! $REPLY =~ ^[Yy]$ ]]; then
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exit
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fi
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while [ -b /dev/bcache0 ]; then
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echo "Canceld, device /dev/bcache0 is allready present"
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exit
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fi
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echo
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echo "Clean disks and setup bcache... "
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dd if=/dev/zero of=$ssddev bs=512 count=8
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dd if=/dev/zero of=$hdddev bs=512 count=8
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wipefs -a $ssddev
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wipefs -a $hdddev
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apt-get update
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apt-get install -y bcache-tools
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make-bcache -C $ssddev -B $hdddev --writeback
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echo
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echo "Wait until device is ready... "
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while [ ! -b /dev/bcache0 ]; do sleep 1; done
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echo
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echo "Config bcache device... "
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echo $sequential_cutoff > /sys/block/bcache0/bcache/sequential_cutoff
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echo "ACTION==\"add\", SUBSYSTEM==\"block\", ENV{MAJOR}==\"252\", ATTR{bcache/sequential_cutoff}=\"$sequential_cutoff\"" \
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> /etc/udev/rules.d/99-bcache_sequential_cutoff.rules
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udevadm test /sys/block/bcache0
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echo
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echo "Format and mount bcache device..."
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mkfs.ext4 /dev/bcache0
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mkdir $mountname
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mount /dev/bcache0 $mountname
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echo "/dev/bcache0 $mountname ext4 rw 0 0" >> /etc/fstab
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echo
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echo "Config default home directory for new users on bcache partition... "
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echo "home path of exising users will not be moved automaticaly"
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mkdir $mountname/home
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echo "#" >> /etc/default/useradd
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echo "# Modifications:" >> /etc/default/useradd
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echo "HOME=$mountname/home" >> /etc/default/useradd
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echo
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echo "Setup successfully finished"
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