On Thu, 15 May 2014, Dave McGuire wrote: I need the /physical/ drive size! Different systems give me different sizes. This, of course, should not happen. The host should query the drive for its size, in blocks...I don't know why a given host OS would give you different numbers. It is listed as 2G...the MicroVAX 3100 I wrote it with claims it's ~570M I see from private email that you had started up the command interface on your Qbus SCSI host adapter. Is there a "scan the bus" command or something like that in there, that might tell you the drive size in blocks, from the perspective of that controller? Alternatively, what I do (as I mentioned in private mail) is to boot 2.11BSD from a different device and look at the ra<n> probe messages for the device size. It scans it...but it doesn't seem to list the size in blocks. :( -Dave -- Cory Smelosky http://gewt.net Personal stuff http://gimme-sympathy.org Projects