If you happen to have a large storage array and are running TrueNAS, this script might come in handy. It makes it easy to turn on/off the LED lights associated with the drive bays (assuming your drive bays do have them)
Python
#!/usr/bin/env python3
import subprocess
import sys
import re
def get_disk_info(disk_name):
try:
cmd = "sesutil show"
result = subprocess.run(cmd, shell=True, check=True, capture_output=True, text=True)
current_ses = None
for line in result.stdout.split('\n'):
if line.startswith('ses'):
current_ses = line.split(':')[0]
elif disk_name in line:
parts = re.split(r'\s{2,}', line.strip())
if len(parts) >= 6:
return {
'ses_device': current_ses,
'slot': parts[0],
'device': parts[1],
'model': parts[2],
'ident': parts[3],
'size': parts[4].rstrip(','),
'status': parts[5] if len(parts) > 5 else ''
}
except subprocess.CalledProcessError as e:
print(f"Error running sesutil show: {e}")
return None
def set_disk_led(disk_number, status):
status = status.lower()
if status not in ['on', 'off']:
print("Error: Status must be 'on' or 'off'")
return
disk_name = f"da{disk_number}"
disk_info = get_disk_info(disk_name)
if disk_info:
print("Disk Information:")
print(f" SES Device: {disk_info['ses_device']}")
print(f" Slot : {disk_info['slot']}")
print(f" Device: {disk_info['device']}")
print(f" Model : {disk_info['model']}")
print(f" Ident : {disk_info['ident']}")
print(f" Size : {disk_info['size']}")
print(f" Status: {disk_info['status']}")
try:
cmd = f"sesutil locate -u /dev/{disk_info['ses_device']} {disk_name} {status}"
subprocess.run(cmd, shell=True, check=True, capture_output=True, text=True)
print(f"\nSuccessfully set LED for {disk_name} to '{status}' on {disk_info['ses_device']}")
except subprocess.CalledProcessError as e:
print(f"\nFailed to set LED for {disk_name} on {disk_info['ses_device']}: {e}")
else:
print(f"Failed to find information for {disk_name}. Check if the disk exists and is connected to an SES-capable enclosure.")
if __name__ == "__main__":
if len(sys.argv) < 2 or len(sys.argv) > 3:
print("Usage: python script_name.py <disk_number> [on|off]")
sys.exit(1)
disk_number = sys.argv[1]
status = sys.argv[2] if len(sys.argv) == 3 else "on"
set_disk_led(disk_number, status)To run it, its as simple as this
Bash
./set-let-status.py 8 on