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--- doc:appunti:linux:sa:raid_shrink [2025/01/03 18:28] – niccolo
+++ doc:appunti:linux:sa:raid_shrink [2025/01/07 10:45] (current) – niccolo
@@ Line 1: / Line 1: @@
 ====== Shrinking a RAID0 volume to add a smaller device to it ======
+**FIXME** Must add the **resize2fs** operation!
 Suppose we have:
@@ Line 48: / Line 50: @@
 </code>
-The overhead of the RAID volume is 899608576 - 899476480 = **132096** kb. For safety we allow an extra space of **128** kb for the RAID superblock. So we can calculate the new array size:
+The overhead of the RAID volume is 899608576 - 899476480 = **132096** kb. For safety we allow an extra space of **128** kb for the RAID superblock.
+=== Calcluate the new array size ===
+So we can calculate the new array size:
 <code>
@@ Line 58: / Line 63: @@
 440535040 - 132096 - 128 = 440402816
 </code>
+It is now possibile to shrink the existing array **/dev/md3** to the new smaller size:
 <code>
 mdadm --grow /dev/md3 -z 440402816
+</code>
+Finally we can add the new component to the shrinked array:
+<code>
+mdadm /dev/md3 --add /dev/sdb7
 </code>