feat(XOSAN): add pics for disperse

docs/xosan_disperse.md

@@ -20,7 +20,7 @@ Cons:
 
 This is similar to **RAID5**: there is an [algorithm](https://en.wikipedia.org/wiki/Reed%E2%80%93Solomon_error_correction) that will generate a kind of parity, being able to continue to work even if 1 node is down. If you reintroduce the node, it will be "healed" automatically.
 
-![picture disperse 3]()
+![picture disperse 3](./assets/disperse3.png)
 
 If you lose one node, your data are still here. This mode will give you **66% of your total disk space**.
 
@@ -28,7 +28,7 @@ If you lose one node, your data are still here. This mode will give you **66% of
 
 Same than 3, like **RAID5**, you can lose 1 node without service interruption.
 
-![picture disperse 5]()
+![picture disperse 5](./assets/disperse5.png)
 
 In this case, you'll be able to use up to **80%** of your total storage capacity!
 
@@ -36,7 +36,9 @@ In this case, you'll be able to use up to **80%** of your total storage capacity
 
 It's very similar to **RAID6**. You can lose up to 2 nodes, it will continue to work in read and write.
 
-![picture disperse 6]()
+![picture disperse 6](./assets/disperse6.png)
+
+![disperse 6 with 2 nodes down](./assets/disperse6_2nodesoff.png)
 
 ## Growing a disperse XOSAN
 
@@ -44,3 +46,5 @@ You can grow a replicated XOSAN by adding extra disperse volumes, in other words
 
 * To grow a disperse 3, you need 3 new nodes. You'll add the total capacity of each disperse to make a distributed-disperse on 2x3 dispersed nodes.
 * To grow a disperse 6, you need 6 new nodes.
+
+![growing disperse](./assets/disperse3_grow.png)

docs/xosan_replicated.md

@@ -61,24 +61,24 @@ The easiest way is to use 3-way replication. You can lose completely 2 hosts, it
 
 The usual deal is to create a "group" of 2 replicated nodes (2x2). In a picture:
 
-![2x2 replication]()
+![2x2 replication](./assets/replicate2x2.png)
 
 #### 5 hosts
 
 There is no way to use the local disks of 5 nodes in a replicated type. So you'll use 4 hosts in XOSAN, and the 5th would be also able to use the shared XOSAN SR, without participating directly to it.
 
-![2x2 replication and 1 extra node]()
-
 #### 6 hosts
 
 You have 2 choices:
 
-1. 2-way replication on 3 nodes (2x3)
-2. 3-way replication on 2 nodes (3x2)
+1. 2-way replication on 3 replicated nodes (2x3)
+2. 3-way replication on 2 triplicated nodes (3x2)
 
 There is more fault tolerance on mode 2, but less space usable. It's up to you!
 
-![2x3 vs 3x2 modes]()
+![2x3 mode](./assets/replicate2x3_full.png)
+
+![3x2 mode](./assets/replicate3x2_full.png)
 
 ## Growing a replicated XOSAN
 

docs/xosan_requirements.md

@@ -37,3 +37,5 @@ For a 6 nodes setup, XOSAN will use in total:
 * 12 vCPUs (usage is in general pretty low)
 * 12 GiB RAM
 * All Local LVM disk space
+
+![picture disperse](./assets/disperse6.png)