I've created a RAID 5 device block by combining 4 HDDs.
The name of my device is md1.
But the /sys/block/md1/queue/scheduler file outputs "none" on doing cat.
And also after editing it using vim its throwing
/sys/devices/virtual/block/md1/queue/scheduler" E667: Fsync failed
I also tried using sysctl.conf and by adding
block.md1.queue.scheduler = deadline
But again it throws
error: "block.md1.queue.scheduler" is an unknown key
I'm really out of options. Please help me out.