Perhaps you do not have to panic about blown drives just yet. There is usually some circuitry to handle this exact issue. Just unplug the LVD drives from the HVD SCSI chain, sacrifice a little furry animal, say the magic words and plug the LVD drives into an SE-SCSI chain and power on. As for the drivers, there are 2 disk drivers, one is for all narrow SE-SCSI drives and the other is for all Fast and Wide HDV SCSI drives and array. I don't think the driver cares about the voltage; it probably cares more about 16 bits versus 8 bits and SCSI addresses up to 15 versus 7. But that's just a guess. Denys -----Original Message----- From: HP-3000 Systems Discussion [mailto:[log in to unmask]] On Behalf Of James B. Byrne Sent: Tuesday, January 03, 2006 8:42 AM To: [log in to unmask] Subject: Re: [HP3000-L] Cannot see added drives in MAPPER > From: On: Saturday, December 31, 2005 1:40 PM, James B. Byrne [mailto:[log in to unmask]] wrote > > Is the ST318404LC low-level formated with a 512 sector size? > On 3 Jan 2006 at 6:16, Legault, Raymond D wrote: > This is how my 8.5 gig are configured on a A500 > > 50 0/6/2/0.0.0 Disk ST39173WC > SCSI_DISK_AND_ARDISC I do not believe that your problem is in the configuration. My understanding is that the device IDs are used only for HPq's diagnostics and that the actual driver software on MPE/iX is the same for every SCSI disc drive. The critical elements are the physical interface electrical characteristics and the low-level format of the device in question. My earlier comment reflects my previous experience with MPE/iX and the HP3000 recognizing SCSI discs. As Chuck pointed out there are other possibilities. The most damaging is if you have attempted to connect a LVD (Low Voltage Differential) device to an HVD (High Voltage Differential) interface. If you did this then you almost certainly have blown the SCSI drive. Thus the drive is dead from a data transmission interface point of view even if it powers up and spins without complaint. Assuming that the electrical interface specifications match and that you are in fact using an LVD i/f card in the HP3000 with LVD SCSI drives (did the A series ever ship with the an HVD interface?) then remaining issue is whether the drive in question has been low level formatted with a sector size other than 512. Drives that have been used with IBM and Apple computers often have sector sizes of 520. You can check this by using a low-level format utility such as those provided by Seagate. The tool can be had at: http://www.seagate.com/support/seatools/. You will need to have a suitable SCSI i/f card in the computer on which you run this utility of course. If the drive has a sector size other than 512 then the HP3000 is never going to recognize it. You will need to perform a low-level format to set a 512 sector size first. Regards, Jim -- *** e-mail is NOT a secure channel *** James B. Byrne mailto:ByrneJB.<token>@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3CE delivery <token> = hal * To join/leave the list, search archives, change list settings, * * etc., please visit http://raven.utc.edu/archives/hp3000-l.html * * To join/leave the list, search archives, change list settings, * * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *