Technical data

iss(7D) Devices SunOS 5.5
A system can be installed using another vendor’s SCSI controller as the boot controller,
Adaptec for example. In this case the Adaptec controller devices assume the controller 0
names, and ISS busses have controllers from 1 onward.
If no devices reside on a given bus of an ISS then the controller number associated with
that bus will be assigned to the next bus.
Logical devices are known to the operating system by the name of the physical devices
that resides at the lowest bus and lowest id of all the physical devices that make up that
logical device. For example: If a 2 drive mirror consisted of the two physical drives at
bus0 id2 and bus3 id7 the device would be known by the OS as c0t2d0s2; c3t7 would not
exist. No device file would be built.
Logical Device
Implementation
Inquiry and capacity commands are simulated by the driver for logical devices based on
logical device information provided by the ISS that resides in ISS dual port memory. The
fact that a device is logical or physical is kept hidden from any levels of software above
this HBA driver.
Logical boot devices (mirrors, stripes, etc.) are allowed. If Solaris x86 is installed on a log-
ical boot device then that logical boot device must include the physical disk device that
resides on bus0 id 1 of the ISS in the lowest system bus slot. [9-F].
Interrupts Each physical ISS generates a unique IRQ. The IRQ is directly tied to the system bus slot
that the board resides in. This is informational only. The user need not do anything
configuration wise to accomplish this. The slot, irq association is as follows:
System Bus Slot IRQ
923
10 22
11 21
12 20
13 19
14 18
15 17
CONFIGURATION The driver attempts to initialize itself in accordance with the information found in the
configuration file, /kernel/drv/iss.conf. No relevant user configurable items are in this
file. Do not modify /kernel/drv/iss.conf.
SEE ALSO driver.conf(4), scsi(4), cmdk(7D), st(7D)
BUGS Once a disk device has been installed with the Solaris x86 OS, the ISS cannot be moved to
a different slot or the system will not boot. The bootable disk drive is ISS slot dependent.
7D-170 modified 23 Jan 1995