larry@focsys.uucp (Larry Williamson) (10/05/90)
I've installed a Wantek 5125es tape drive in our ISC2.2 system. I can't open to the new device. Using dd(1) to open /dev/tape, it fails with the error message... dd: cannot create /dev/tape: No such device or address The tape drive is is connected to an Adaptec 1542a controller (along with a Maxtor drive that we've been using for months). The disk is SCSI id 0, the tape is SCSI id 5. When the system is booted, the tape drive initializes (what a racket!) The tape drive had been used in a Sony News station, so I'm sure it is okay. I installed the tape driver through kconfig's 'configure HPDD' option. kconfig did not create the node.d/tape file, I had to do this by hand based on what I read in tape(7). This is what node.d/tape looks like at this moment. tape tape c 12 tape ntape c 4 I've poured over the FMs and can find nothing that seems to help. Any suggestions? -Larry
support@ism780c.isc.com (Support account) (10/10/90)
In article <LARRY.90Oct5114130@focsys.uucp> larry@focsys.uucp (Larry Williamson) writes: > >I've installed a Wantek 5125es tape drive in our ISC2.2 system. I >can't open to the new device. Using dd(1) to open /dev/tape, it fails >with the error message... > dd: cannot create /dev/tape: No such device or address > One more thing to check would be DMA channel settings. In software, this parameter is contained the rightmost field of the file /etc/conf/cf.d/mdevice (documented in mdevice(4)), in this case on the "tape" line. For this particular device, the field should be either 5 or 6, matching the setting in hardware. If the software doesn't match hardware, or if that field is set to "-1" (meaning device doesn't use DMA), this error message can result. ...