NAS - Build a Linux NAS - Monitor the System

cat /proc/mdstat

returns:

mdadm --detail /dev/md0

returns:

ls /sys/devices/virtual/block/md0/md/

returns:

array_size       component_size  dev-sdc1  metadata_version          raid_disks  reshape_position     stripe_cache_size  sync_completed       sync_speed
array_state      degraded        dev-sdd1  mismatch_cnt              rd0         resync_start         suspend_hi         sync_force_parallel  sync_speed_max
bitmap_set_bits  dev-sda1        layout    new_dev                   rd1         safe_mode_delay      suspend_lo         sync_max             sync_speed_min
chunk_size       dev-sdb1        level     preread_bypass_threshold  rd2         stripe_cache_active  sync_action        sync_min