It's been at least 7 years since I set one of these units up, but they're rock-solid. If I remember correctly, you had two SPs (Storage Processors) installed in the back at the top. You might try 7-E-1 (and perhaps 2400 or 4800) ?
DRM sounds more like the utility for the rebranded NEC arrays (much like the SUN A1000), in which you could manage over SCSI or serial.
I'll check for some notes as well. Let us know how you make out.