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--- home_server:home_server_setup:other_services:snapraid [2023-05-28 Sun wk21 09:18] – baumkp
+++ home_server:home_server_setup:other_services:snapraid [2025-02-16 Sun wk07 09:52] (current) – baumkp
@@ Line 1: / Line 1: @@
 {{tag>snapraid linux}}
 ======snapraid======
+I have been using [[https://www.snapraid.it/|snapraid]] since circa 2015 for my main first past redundancy.  I have a second home server used as a backup server that weekly backs up using [[home_server:home_server_setup:other_services:back-up_server#restic]].
+The main snapraid commands I use are:
+''sudo snapraid sync'' to sync the files that have changes since last sync.  I usually do this weekly, manually.
+''sudo snapraid scrub'' to check the parity of the array, usually the oldest files first.  I usually do this weekly, manually.
+''sudo snapraid status'' to check the status of the array.  I usually do this weekly, manually.
+''sudo snapraid touch'' to add sub-second time granularity to the files that improves snapraid usage.  I usually do this weekly, if reported as requried by status, manually.
+''sudo snapraid smart'' to check the smart status of the array drives (does not report on nvme drives).  I usually do this weekly, manually. Really for information only.
+Snapraid allows files and directories that have been deleted since the last sync to be recovered.
+  *''snapraid diff --test-fmt path''
+  *''snapraid diff --test-fmt disk'' This will let you know the data disk from snapraids array perspective
+Snapraid does not expect you to provide the absolute file system path when fixing files.
+  *''snapraid fix -m'' This will recreate any deleted file in the entire array
+  *''snapraid fix -m -d d1'' This will recreate any deleted file on data disk d1
+  *''snapraid fix -m -f Example/'' This will recreate the contents of any folder named Example anywhere in the array
+  *''snapraid check -m -f Example/ -v'' If you are unsure what will happen you can replace fix with check above and add -v with this. Snapraid will then tell you that there is a problem with each of the files matching the filter or that they are ok.
+The main snapraid configuration file ''/etc/snapraid.conf''
+++++Install Snapraid on Linux|
+Some good references are [[https://zackreed.me/setting-up-snapraid-on-ubuntu/|Setting up SnapRAID on Ubuntu to Create a Flexible Home Media Fileserver]] and [[https://havetheknowhow.com/configure-the-server/install-snapraid/|How to install and configure SnapRAID on Ubuntu Server]]
+<code bash>apt-get install gcc git make -y
+cd
+wget https://github.com/amadvance/snapraid/releases/download/v12.3/snapraid-12.3.tar.gz
+tar xzvf snapraid-12.3.tar.gz
+cd snapraid-12.3/
+./configure
+make
+make check
+make install
+cd ..
+cp ~/snapraid-12.3/snapraid.conf.example /etc/snapraid.conf
+cd ..
+rm -rf snapraid*
+</code>
+++++
+++++My main server configuration files, /etc/snapraid.conf|
+I probably should check this configuration file against the latest version example.  My current operating version is 12.0 (2021/12) the latest version is 12.4 (2025/01), there looks to be mainly some minor optimisations and bug fixes.
+<code># 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 /media/disk3/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 /home/snapraid.content
+content /media/disk1/snapraid.content
+content /media/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 /home/shared
+data d2 /media/disk1/
+data d3 /media/disk2/
+# 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/
+exclude /.Trash-0/
+exclude /*.vhdx
+exclude .thumbs.db
+exclude /VMs/
+exclude /home/shared/www/html/logs/
+exclude logs/
+exclude log/
+#exclude .config/
+exclude .cache/
+exclude /home/baumkp/.vnc/
+exclude .log
+# 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 100
+# 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
+</code>
+++++
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