What can you do with intelligent (SES-compatible) enclosures?
Here are some examples of scripts that I have written using the command-line engine in smartmon-ux.
Emulate the typical LED and alarms one would see with a hardware-based RAID controller so an appliance that uses software-based RAID has same look-and feel …
- Sound the audible alarm once mdstat indicates a logical disk becomes critical.
- Light the FAULT LED
- Query the O/S to find out the surviving disks, then set them to blink. This way user knows what disks are being rebuilt.
- Use the ID LED to indicate which hot spare the O/S chose to rebuild the LUN with.
Make pretty patterns with the LEDs in a RAID array for trade shows.
Mute audible alarms that drive people nuts, especially ones that indicate a fault that can’t be addressed until next week some time.
Query enclosure to determine the serial number or WWN of a device given the row/col of a slot or vise-versa.
Test all SES components to just make sure they work, without having to manually break things or unplug power supplies and/or disk drives.
SES will let you light the LED(s) associated with the SLOT the drive is installed in. This is a better mechanism then lighting the LED on a disk drive, since the technique will always work, even if the disk drive is dead or dying.