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Good fun, thank you, certainly more focused info than the ddk devicetree tool. Courtesy a guru I know in Nacogdoches, Texas, now we know the Win 2K/XP tape analogue of the \\.\A: \\.\B: of disks & cd-roms ... is \\.\TAPE0 \\.\TAPE1 ... That is, in place of a drive letter, count 0 1 2 ..., and prepend prefix TAPE, but append no trailing colon. And then IOCTL_SCSI_PASS_THROUGH works. Thanks again, Pat LaVarre P.S. This answer works only if the DeviceManager lists your tape drive as a Tape drive, rather than an Other device. P.P.S. This answer is easy to find, After you know it. MSDN articles that suggest trying this include: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/base/creating_a_backup_application.asp Another hint is in the DeviceManager Properties for each of your "Tape drives". There I see the "Tape Symbolic Name" tab suggest "Tape0", for example. A relevant web trail I enjoyed was: http://www.bustrace.com/products/guid_explorer.htm http://www.bustrace.com/products/devfilter.htm http://www.bustrace.com/support/links.htm I like that links page, just two clicks reaches my: http://members.aol.com/plscsi/ The copies of GuidExp.exe and devfilter.exe that I got from bustrace.com passed the @ieee.org virus check. devfilter.exe doesn't see my tape drive, but GuidExp.exe lists my tape drive as a device of GUID_DEVCLASS_TAPEDRIVE. -----Original Message----- From: Mike Berhan [mailto:mikeb@;bidali.com] Sent: Tue 10/15/2002 5:35 AM To: [EMAIL PROTECTED] Cc: Subject: RE: [t13] CDB's without drive letters in Win 2K/XP This message is from the T13 list server. Pat, > Anybody here know the Win 2K/XP path to SCSI-over-whatever that > don't have drive letters? You can use the SetupDiXXX set of APIs to enumerate a class of devices (e.g. all disk drives, all CD/DVD drives, etc.). Once you enumerate the device, you can query a variety of device properties. This free utility we have might be of value (it uses the mentioned APIs): http://www.bustrace.com/products/guid_explorer.htm Mike Berhan
