Cheshire Datasystems Ltd are a provider of an insurance quotes package on either TSX or OpenVMS,

The picture to the right shows a DEC DS20 cluster with two Baydel RAID arrays below. The little blue box between the DS20s is a DLT tape drive. We supported numerous sites around the country and also with modems to dial-in and do some system admin and/or maintenance.

I wrote a DECbasic program to monitor the Baydel RAID arrays via their serial ports. It was needed and after spending £15k on the RAID array it always struck me as a bit cynical to then request £300 for monitoring software. No wonder they no longer exist.