From: G W Cantello (glenn.w.cantello@opg.com)
Date: Fri Aug 30 2002 - 15:36:29 EDT
My Thanks to the following respondees:
Laurence.Moughan@o2.com (Laurence Moughan)
sxi@sympatico.ca (Simon-Bernard Drolet)
borris_8@yahoo.com (Jason Wood)
We were trying to reassign tape drive names without rebooting. We
were using devfsadm but it wasn't doing what we wanted.. refer to
original question below.
cfgadm command seems to do most of what we want.
cfgadm -la
lists the configurable devices. Our drives appeared as:
# cfgadm -la
Ap_Id Type Receptacle Occupant Condition
c1::rmt/0 tape connected configured unknown
c1::rmt/1 tape connected configured unknown
c6::rmt/2 tape connected configured unknown
c6::rmt/3 tape connected configured unknown
Of these, 0 and 2 were actually connected.
So, we unconfigured rmt/3 as follows:
# cfgadm -c unconfigure c6::rmt/3
which lead to:
c6::rmt/3 unavailable connected unconfigured unknown
followed by:
# devfsadm -C -c tape
which lead to:
c6::st5 unavailable connected unconfigured unknown
I did not expect this. Nothing was connected so I hoped it would disappear.
However, we used cfgadm -c unconfigure against the remaining tape devices
(attached or otherwise) and then:
# rm /devices/pci@1f,4000/scsi@2/st*
# rm /devices/pci@6,4000/pci@4/SUNW,isptwo@4/st*
# rm /dev/rmt/*
Then, we used cfgadm to configure the drives in the order we wanted:
# cfgadm -c configure c6::st4
# cfgadm -c configure c1::st18
# devfsadm -C -v -c tape
And we have:
# cfgadm -la
Ap_Id Type Receptacle Occupant Condition
c1::rmt/1 tape connected configured unknown
c1::st19 unavailable connected unconfigured unknown
c6::rmt/0 tape connected configured unknown
c6::st5 unavailable connected unconfigured unknown
Would still like to remove the unused links but for now we are okay.
I expect a reconfigure boot may clear the rest.
======================
======================
Original Question Follows:
======================
======================
We have an E450, running Sol8 2/02 patched to ~ June, 2002
It has a SunSwitft 10/100BaseT Ethernet + Fast/Wide UltraSCSI-2
connection.
We have two tape drives (DLT8000) connected, one to main SCSI-2
connector and one to the SunSwift card.
Wanted to switch the drive on main SCSI connector with the other
one. please accept that this was necessary.
The drives were powered off and the cables switched.
Power on the drives and we no longer see either one. We determine
that one tape drive was set to target 4 and one to target 5. So,
we run
# devfsadm -C -c tape
Now we have 4 tape devices in our device tree.
power off drives and run it again.
same thing, 4 devices.
disconnect the cables
# rm /dev/rmt/*
# rm /devices/pci@1f,4000/scsi@2/st* (motherboard device)
# rm /devices/pci@6,4000/pci@4/SUNW,isptwo@4/st* (SunSwift card)
# devfsadm -C -c tape
same thing, 4 devices.
We are not able to force E450 to remove these devices completely.
Machine is in production and may be some time before we can reboot
with reconfigure to see if this would help. Seems like somehow the
kernel is "remembering" the tape drives existed. Any advice on how
to make E450 not remember this stuff? Is it in a file somewhere?
We ran in to a similar problem some time ago with controllers. We
eventually tracked that to /dev/cfg where it remembered all controllers
ever plugged in. Is there something similar for tape drives?
TIA
============================================================
Glenn W. Cantello email address: glenn.w.cantello@opg.com
Ontario Power Generation; 416 592-5534 (v); 416 592 5528 (f)
H11 G27; 700 University Avenue, Toronto, ON M5G 1X6 CANADA
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