Disk configuration for 'orac'

For more info see 'orac'.

sda (750GB)
WD-WX81A43N0219

sda1 (512M)
boot

sda2 (250G)
/

sda3 (400G)
data:cache

sda4 (48G)
swap

sdb (3TB)
WD-WMC4N0D5506W
data

sdc (3TB)
WD-WMC4N0D8E3C9
data

sdd (3TB)
WD-WMC4N1926862
data

Device	Drive	Model	Commissioned	Sequential	Random	WRL	Temp °C	Data Sheet
sda	WD Black 750GB	WD7500BPKT-22PK4T0	2014?	83 MB/s	1 MB/s	55 TB/yr	0°C to 60°C	download
sd[bcd]	WD Red 3TB 5400rpm	WD30EFRX-68EUZN0	2014?	106 MB/s	1 MB/s	180 TB/yr	0°C to 60°C	download

ext4

Device	Capacity	Mount
sda2	250GB	/

ZFS zpools

Note: we don't have separate log devices for /data because we don't want to wear out the SSD. /data can write its logs to the magnetic disks, that's fine.

Pool	RAID	Capacity	Compression	Dedup
data	RAIDZ	6TB	lz4	on

ZFS datasets

These are the datasets we create on our zpools.

Dataset	Mount
data	/data
data/home	/home
data/home/jj5	/home/jj5
data/mysql	/var/lib/mysql
data/host	/data/host

Commands

# apt install zfsutils-linux

# zpool create data raidz sdb sdc sdd
# zpool add data cache sda3
# zfs set atime=off data
# zfs set xattr=sa data
# zfs set acltype=posixacl data
# zfs set compression=lz4 data
# zfs set dedup=on data
# zfs create data/home
# zfs create data/home/jj5
# mv /home /home.bak
# zfs set mountpoint=/home data/home
# chown jj5:jj5 /home/jj5
# mv /home.bak/jj5/* /home/jj5/
# mv /home.bak/jj5/.[!.]* /home/jj5/
# zfs create data/mysql
# zfs set mountpoint=/var/lib/mysql data/mysql
# zfs create data/host

To prepare for system rebuild:

# zpool remove data sda3
# zpool export data