docs(blk): make more macros

Author: SamyOubouaziz

macros/concepts/local-volumes.mdx

@@ -0,0 +1,5 @@
+---
+macro: local-volumes
+---
+
+The local volume of an Instance is an all-SSD-based storage solution, using a RAID array for redundancy and performance, hosted on the local hypervisor. On Scaleway Instances, the size of the local volume is fixed and depends on the Instance type. Some Instance types do not use local volumes and [boot directly on block volumes](#boot-on-block). In any case, it is always possible to increase the storage of an Instance by adding additional block volumes.

macros/concepts/volumes.mdx

@@ -0,0 +1,9 @@
+---
+macro: volumes
+---
+
+Volumes are the storage space of your Instances. Two types of volumes exist:
+
+* **[Local volumes](/local-storage/)**: The local volume of an Instance is an all-SSD-based storage solution, using a RAID array for redundancy and performance, hosted on the local hypervisor. On Scaleway Instances, the size of the local volume is fixed and depends on the Instance type. Some Instance types do not use local volumes and [boot directly on block volumes](/instances/concepts/#boot-on-block).
+
+* **[Block volumes*](/block-storage/)**: Block volumes provide network-attached storage you can plug in and out of Instances like a virtual hard drive. Block volumes behave like regular disks and can be used to increase the storage of an Instance.

pages/block-storage/concepts.mdx

@@ -22,6 +22,10 @@ categories:
 
 <Macro id="block-volumes" />
 
+## Boot-on-block
+
+<Macro id="storage-boot-on-block" />
+
 ## IOPS
 
 IOPS or Input/Ouptut Operations Per Second, is a unit of measurement that indicates how many read/write operations a storage device is performing per second.
@@ -33,7 +37,7 @@ Scaleway Block Storage Low Latency offers two IOPS limits:
 
 ## Local volume
 
-The local volume of an Instance is an all SSD-based storage solution, using a RAID array for redundancy and performance, that is hosted on the local hypervisor.
+<Macro id="local-volumes" />
 
 ## Region
 

pages/instances/concepts.mdx

@@ -86,7 +86,7 @@ With IP mobility, there are no NAT IPs anymore. The public IP is entirely routed
 
 ## Local volumes
 
-The local volume of an Instance is an all-SSD-based storage solution, using a RAID array for redundancy and performance, hosted on the local hypervisor. On Scaleway Instances, the size of the local volume is fixed and depends on the Instance type. Some Instance types do not use local volumes and [boot directly on block volumes](#boot-on-block). In any case, it is always possible to increase the storage of an Instance by adding additional block volumes.
+<Macro id="local-volumes" />
 
 ## Placement groups
 
@@ -174,8 +174,4 @@ Tags allow you to organize, sort, filter, and monitor your cloud resources using
 
 ## Volumes
 
-Volumes are the storage space of your Instances. Two types of volumes exist:
-
-* **[Local volumes](/local-storage/)**: The local volume of an Instance is an all-SSD-based storage solution, using a RAID array for redundancy and performance, hosted on the local hypervisor. On Scaleway Instances, the size of the local volume is fixed and depends on the Instance type. Some Instance types do not use local volumes and [boot directly on block volumes](#boot-on-block).
-
-* **[Block volumes*](/block-storage/)**: Block volumes provide network-attached storage you can plug in and out of Instances like a virtual hard drive. Block volumes behave like regular disks and can be used to increase the storage of an Instance.
+<Macro id="volumes" />

pages/local-storage/concepts.mdx

@@ -14,15 +14,15 @@ categories:
 
 ## Block volumes
 
-Block volumes provide network-attached storage you can plug in and out of Instances like a virtual hard drive. From a user's point of view, block volumes behave like regular disks and can be used to increase the storage of an Instance.
+<Macro id="block-volumes" />
 
-## Boot-on-Block
+## Boot-on-block
 
-Some Instance types do not use local volumes and instead boot directly on block volumes.
+<Macro id="storage-boot-on-block" />
 
 ## Local volumes
 
-The local volume of an Instance is an all-SSD-based storage solution, using a RAID array for redundancy and performance, hosted on the local hypervisor. On Scaleway Instances, the size of the local volume is fixed and depends on the Instance type. Some Instance types do not use local volumes and [boot directly on block volumes](#boot-on-block). In any case, it is always possible to increase the storage of an Instance by adding additional block volumes.
+<Macro id="local-volumes" />
 
 ## Power-off mode
 
@@ -34,7 +34,4 @@ Standby mode is a way to stop an Instance temporarily. When you put an Instance
 
 ## Volumes
 
-Volumes are the storage space of your Instances. Two types of volumes exist:
-
-- **[Local volumes](/local-storage/)**: The local volume of an Instance is an all-SSD-based storage solution, using a RAID array for redundancy and performance, hosted on the local hypervisor. On Scaleway Instances, the size of the local volume is fixed and depends on the Instance type. Some Instance types do not use local volumes and [boot directly on block volumes](#boot-on-block).
-- **[Block volumes](/block-storage/)**: Block volumes provide network-attached storage you can plug in and out of Instances like a virtual hard drive. Block volumes behave like regular disks and can be used to increase the storage of an Instance.
+<Macro id="volumes" />