MTL-1447 RAID PENDING sync on read-only

.version

@@ -1 +1 @@
-1.5.7
+1.5.8

90metalmdsquash/metal-md-scan.sh

@@ -12,4 +12,19 @@ if ! lsmod | grep -q raid1 ; then :
     # assume that this is a disk boot already loaded with artifacts or this is a network boot
     # that's about to obtain artifacts into an existing array (/sbin/metal-md-disks.sh).
     # We also can't check for the oval image for the same reason.
-fi
+else
+    # If the raid module is loaded then give it a bump so any code in this file can anticipate RAID
+    # RAID arrays to be available if they exist.
+    mdadm --assemble --scan
+    udevadm settle 2>/dev/null
+fi
+
+# Also check for any RAIDs that may be in PENDING, sometimes the RAID arrays may stall the boot
+# if they did not fully sync before rebooting. The stall is usually only 1-5minutes, but it may vary
+# to an hour or indefinite.
+for md in $(find /dev/md** -type b); do
+    handle=$(echo -n $md | cut -d '/' -f3)
+    if grep -B 2 $handle /proc/mdstat | grep -qi pending ; then
+        mdadm --readwrite $md
+    fi
+done