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--- linux:filesystems:raid [2013/03/10 17:53]
tkilla created
+++ linux:filesystems:raid [2021/05/02 15:07] (current)
tkilla [RAID setup changes]
@@ Line 1: / Line 1: @@
 ====== RAID ======
-raid howto is located in [[linux:filesystems:crypto_raid|]]
+**raid howto is located in [[linux:filesystems:crypto_raid|]]**
@@ Line 22: / Line 22: @@
 watch revovery:
   watch cat /proc/mdstat
+update existing initramfs:
+  update-initramfs -u -k all
+===== RAID setup changes =====
+update the raid config - achtung ">>" adds to the files, ">" overwrites:
+  mdadm --examine --scan >> /etc/mdadm/mdadm.conf
+you need to update initramfs: to find the root raid
+make sure these modules are included in /etc/initramfs-tools/modules
+  raid0
+  raid1
+  md
+re-create inramfs:
+  update-initramfs -u -k all
+check in /boot, if they got recreated!
+  dpkg-reconfigure mdadm
+===== RAID Monitoring Tools / resync =====
+Check RAID Status:
+   watch -n1 cat /proc/mdstat
+   mdadm --detail /dev/md2
+Check Resync Speed Limits:
+  sysctl dev.raid.speed_limit_min
+  sysctl dev.raid.speed_limit_max
+Reconfigure Speed Limits:
+  sysctl -w dev.raid.speed_limit_min=50000   # increase speed -> higher system load
+  sysctl -w dev.raid.speed_limit_max=5000    # lower speed -> less load, more time
+Links:
+  * https://www.cyberciti.biz/tips/linux-raid-increase-resync-rebuild-speed.html
+  *

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