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--- ubuntu:disk:ramdisk:persisting_ramdisk_data [2021/06/22 11:01] – created peter
+++ ubuntu:disk:ramdisk:persisting_ramdisk_data [2021/06/22 11:18] (current) – [Test] peter
@@ Line 1: / Line 1: @@
 ====== Ubuntu - Disk - Ramdisk - Persisting Ramdisk Data ======
-A Ramdisk will usually lose all data within it when turned off, or upon a reboot.
+A Ramdisk is a temporary storage device.
-The approach is:
+When the computer is shutdown all the data within the Ramdisk is erased.
+To ensure this data is retained, the approach taken here is:
   * Save Ramdisk data to hard drive on system shutdown.
@@ Line 9: / Line 11: @@
 <WRAP info>
-**NOTE:**  The directory where the Ramdisk is mounted and where the backup data will be saved must have the same file permissions.
+**NOTE:**  The syncing from the Ramdisk to the hard disk and vice-versa will be slow, but at least the data will be stored permanently.
+  * In essence, the Ramdisk acts here as a cache.
 </WRAP>
@@ Line 49: / Line 54: @@
 WantedBy=multi-user.target
 </file>
+<WRAP info>
+**NOTE:**  The directory where the Ramdisk is mounted and where the backup data will be saved must have the same file permissions.
+</WRAP>
+----
+===== Enable the ramdisk-sync service =====
+<code bash>
+sudo systemctl enable ramdisk-sync.service
+</code>
+<WRAP info>
+**NOTE:**  The ramdisk-sync service will start automatically on system boot.
+</WRAP>
+----
+===== Reboot =====
+<code bash>
+sudo reboot
+</code>
+----
+===== Check whether the ramdisk-sync service is running =====
+<code bash>
+sudo systemctl status ramdisk-sync
+</code>
+----
+===== Check the contents of the /mnt/ramdisk and /mnt/ramdisk_backup directories =====
+<code bash>
+ls /mnt/ramdisk{,_backup}
+</code>
+<WRAP info>
+**NOTE:**  Both should be empty.
+</WRAP>
+----
+===== Test =====
+Copy some files to the Ramdisk /mnt/ramdisk.
+Reboot again.
+Check again the contents of both the /mnt/ramdisk and /mnt/ramdisk_backup directories.
+  * They should be the same!
+----