Visually identifying Dell disks on Solaris

I have a Dell PE1950 running the latest OpenSolaris, connected to a Dell MD1000 enclosure with 15 disks in it. I am not using PERC to control the disks, instead I use a simple SAS 5/E (LSISAS1068) controller that exposes the raw disks so we can use ZFS RAID instead of hardware RAID.

It all works very well, but I have one worry about the time when we need to replace one of the disks for any reason. When I used PERC, it had the capability of turning the error led on the disk if something went bad, and also gave me a way to manually blink the led should I want to physically locate it for any reason.

However, now when I use the plain SAS connection it looks like these capabilities are inaccessible, and the only way to identify the disk is by guessing what it is from the device number (which I find very risky), or shutting down the whole system, pulling the disks one by one and comparing the serial#.

Both options are, of course, not acceptable. I would like to know if there is any way that I could manually operate the LEDs on Solaris. I have searched a lot and found that on Sun servers this can be done using the cfgadm tool, but when I tried to run the same commands on my server it failed, saying the hardware specific feature is unavailable.

I also tried using the LSIUtil command, but it doesn't seem like it supports this functionality either.

Is there any way I could visually identify the disks?

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