HP Serviceguard Extended Distance Cluster for Linux A.12.00.00 Deployment Guide, March 2014

# echo 50000 > /proc/sys/dev/raid/speed_limit_min

# sysctl -w dev.raid.speed_limit_min=50000

A.6 Enabling and Disabling Write Intent Internal Bitmap

You can either enable or disable write intent internal bitmap from an active array as follows:

1. To enable bitmap for an MD device /dev/md0:

#mdadm --grow --bitmap=internal /dev/md0

2. To disable bitmap for an MD device /dev/md0:

#mdadm --grow --bitmap=none /dev/md0

52 Managing an MD Device