snapraid.conf.example

# Example configuration for snapraid

# Defines the file to use as parity storage
# It must NOT be in a data disk
# Format: "parity FILE [,FILE] ..."
parity /mnt/diskp/snapraid.parity

# Defines the files to use as additional parity storage.
# If specified, they enable the multiple failures protection
# from two to six level of parity.
# To enable, uncomment one parity file for each level of extra
# protection required. Start from 2-parity, and follow in order.
# It must NOT be in a data disk
# Format: "X-parity FILE [,FILE] ..."
#2-parity /mnt/diskq/snapraid.2-parity
#3-parity /mnt/diskr/snapraid.3-parity
#4-parity /mnt/disks/snapraid.4-parity
#5-parity /mnt/diskt/snapraid.5-parity
#6-parity /mnt/disku/snapraid.6-parity

# Defines the files to use as content list
# You can use multiple specification to store more copies
# You must have least one copy for each parity file plus one. Some more don't hurt
# They can be in the disks used for data, parity or boot,
# but each file must be in a different disk
# Format: "content FILE"
content /var/snapraid.content
content /mnt/disk1/snapraid.content
content /mnt/disk2/snapraid.content

# Defines the data disks to use
# The name and mount point association is relevant for parity, do not change it
# WARNING: Adding here your /home, /var or /tmp disks is NOT a good idea!
# SnapRAID is better suited for files that rarely changes!
# Format: "data DISK_NAME DISK_MOUNT_POINT"
data d1 /mnt/disk1/
data d2 /mnt/disk2/
data d3 /mnt/disk3/

# Defines the name and mount point of additional disks to monitor
# with the 'smart' and 'probe' commands.
# This is useful for monitoring disks that are not part of the array
# but are required for the system to function, such as the boot disk.
# Format: "other DISK_NAME DISK_MOUNT_POINT"
extra boot /

# Enable the use of filesystem snapshots for sync, scrub, check, and fix
# commands.
#
# When enabled, SnapRAID creates a read-only snapshot of your data at the
# start of a 'sync'. This ensures a consistent, point-in-time view of your
# files, preventing errors caused by concurrent file modifications.
#
# This option applies exclusively to data disks formatted with the
# Btrfs, Bcachefs or ZFS filesystems. Parity disks, or data disks using
# other filesystems, will always use the live version of the filesystem.
#
# This significantly improves recovery: if a file is deleted from the live
# filesystem, it remains preserved in the snapshot. This prevents the parity
# from becoming "broken" for that block, ensuring you can still successfully
# recover data if another disk fails.
#
# Snapshots are stored in a hidden '.snapraid' directory at the root
# of the subvolume containing your data. SnapRAID will automatically
# detect the subvolume root for each data path.
#
# Snapshot creation and deletion require administrative privileges.
# Ensure SnapRAID is run with the necessary permissions (e.g., sudo) when
# this option is enabled.
#
# See the 'Snapshots' section in the snapraid(1) manpage for a detailed
# explanation of the snapshot lifecycle.
#snapshot

# Excludes hidden files and directories (uncomment to enable).
#nohidden

# Defines files and directories to exclude
# Remember that all the paths are relative at the mount points
# Format: "exclude FILE"
# Format: "exclude DIR/"
# Format: "exclude /PATH/FILE"
# Format: "exclude /PATH/DIR/"
exclude *.unrecoverable
exclude /tmp/
exclude /lost+found/

# Defines the block size in kibi bytes (1024 bytes) (uncomment to enable).
# WARNING: Changing this value is for experts only!
# Default value is 256 -> 256 kibi bytes -> 262144 bytes
# Format: "blocksize SIZE_IN_KiB"
#blocksize 256

# Defines the hash size in bytes (uncomment to enable).
# WARNING: Changing this value is for experts only!
# Default value is 16 -> 128 bits
# Format: "hashsize SIZE_IN_BYTES"
#hashsize 16

# Automatically save the state when syncing after the specified amount
# of GB processed (uncomment to enable).
# This option is useful to avoid to restart from scratch long 'sync'
# commands interrupted by a machine crash.
# It also improves the recovering if a disk break during a 'sync'.
# Default value is 0, meaning disabled.
# Format: "autosave SIZE_IN_GB"
#autosave 500

# Set the maximum allowed disk temperature (in Celsius).
# If any disk reaches or exceeds this temperature,
# SnapRAID stops all operations and spins down all disks
# to prevent overheating.
#temp_limit 50

# Set the standby duration (in minutes) after a temperature event.
# During this period, disks remain spun down to cool down
# before SnapRAID automatically resumes operations.
# Default is 15 minutes if not specified.
#temp_sleep 10

# Defines the pooling directory where the virtual view of the disk
# array is created using the "pool" command (uncomment to enable).
# The files are not really copied here, but just linked using
# symbolic links.
# This directory must be outside the array.
# Format: "pool DIR"
#pool /pool

# Defines a custom smartctl command to obtain the SMART attributes
# for each disk. This may be required for RAID controllers and for
# some USB disk that cannot be autodetected.
# In the specified options, the "%s" string is replaced by the device name.
# Refers at the smartmontools documentation about the possible options:
# RAID -> https://www.smartmontools.org/wiki/Supported_RAID-Controllers
# USB -> https://www.smartmontools.org/wiki/Supported_USB-Devices
#smartctl d1 -d sat %s
#smartctl d2 -d usbjmicron %s
#smartctl parity -d areca,1/1 /dev/sg0
#smartctl 2-parity -d areca,2/1 /dev/sg0