Well yes, its for the CD ROM holding the VMS distribution. However it does at least recognize a DEC RZ series disk. I worked for DEC for a long time and 'unsupported' means field service did not have funding for what could be non-Dec (SCSI) devices on the controller because DSSI was DEC's own SCSI variant. It does not mean 'this does not work' In fact DEC engineers routinely evaluated third party SCSI drives on it. Rod -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Patrick Finnegan Sent: 22 February 2008 15:43 To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: VAX wish list. On Friday 22 February 2008 10:18, Sridhar Ayengar wrote: Huh? The KZQSA was the controller that generally was used to attach a SCSI CDROM to a later model QBUS MicroVAX or VAX 4000. I seem to remember posts on here indicating that you could also use it for a single SCSI disk, and it mostly worked, as long as it didn't have >1 device on it. Other than that, IIRC, it's VMS-only. Pat -- Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org