Characteristics of RAM, SSD, HDD, Tape

lectures/file-and-data-systems/slides.qmd

@@ -53,15 +53,26 @@ author: "Florian Ziemen and Karl-Hermann Wieners"
 * RAM needs electricity to keep the data.
 * All but tape usually remain powered.
 
-
 ## RAM disk
 
-## Solid state disk
+* Use RAM as if it were a disk
+  * `tmpfs` filesystems on levante (`/dev/shm`)
+
+## Solid-state disk/flash drives
+
+* Non-volatile electronic medium
+  - keeping state (almost) w/o energy supply
 
 ## Hard disk
 
+* Stacks of magnetic disks with read/write heads
+* Spinning to make every point accessible by heads
+
 ## Tape
 
+* Spools of magnetizable bands
+* Serialized access only
+
 # Access logics
 
 ## File systems