det@hawkmoon.MN.ORG (Derek E. Terveer) (12/07/90)
I am trying to implement power sequencing of drives in a scsi (st01) disk driver and have run into a few problems. At first, I couldn't get the drives to respond to my command -- all they did was sit there flickering their front panel LEDs after the command was sent and the drive was pretty much unusable. So, eventually, i tried putting in a delay after the command was sent and that seemed to work on one drive (wren iv) but the other drive (wren iii) seems to not want to respond. I *was* able, at one time, to get the wren iii to start but i can't get it to do it any more. Sigh. Neither drive will allow me to stop the spindle. Are there any tricks to this? A certain amount of delay? Always look for a disconnect, etc???? derek Please send replies via email to: det@hawkmoon.mn.org -- Derek Terveer det@hawkmoon.MN.ORG Minnesota Field Hockey Association, North Central Section University of Minnesota Women's Lacrosse, Midwest District
det@hawkmoon.MN.ORG (Derek E. Terveer) (12/07/90)
In article <1990Dec7.070847.1699@hawkmoon.MN.ORG>, det@hawkmoon.MN.ORG (Derek E. Terveer) writes: > I am trying to implement power sequencing of drives in a scsi (st01) disk In order to fend off a flury of suggestions along the lines of "Make sure that the motor start option is enabled," I *did* enable the motor start option on both drives... derek -- Derek Terveer det@hawkmoon.MN.ORG Minnesota Field Hockey Association, North Central Section University of Minnesota Women's Lacrosse, Midwest District
gibson@b11.ingr.com (Stan Gibson) (12/11/90)
In article <1990Dec7.070847.1699@hawkmoon.MN.ORG> det@hawkmoon.MN.ORG (Derek E. Terveer) writes: >but i can't get it to do it any more. Sigh. Neither drive will allow me to >stop the spindle. Are there any tricks to this? A certain amount of delay? Most Wren products will not allow you to spin them down via software command. When I asked them about this they claimed they preferred you let the drive spin down on power down so they could use the "back emf" generated by the motor. Try using another vendors drive.