Kurzweil scsi Benutzerhandbuch
KURZWEIL K2000/K2vx/K2500/K2600 SCSI HELP
The following document contains information on using SCSI with the
K2000/K2vx/K2500/K2600, as well as specific sections dealing with the using the
Kurzweil in a SCSI chain with your computer. For all info below, any reference to
the K2000 also applies to the K2vx
K2000/K2vx/K2500/K2600, as well as specific sections dealing with the using the
Kurzweil in a SCSI chain with your computer. For all info below, any reference to
the K2000 also applies to the K2vx
Basic SCSI Information:
Here are some basic guidelines to follow when configuring a SCSI chain:
1.
Never, ever plug or unplug SCSI cables when your equipment is turned on.
SCSI cables carry power. The act of plugging or unplugging cables causes
momentary short circuits, which can result in damage to the internal circuitry of
your SCSI device. The only damage that usually occurs to SCSI hardware comes
from static electricity "zapping" SCSI connector pins when the cables are
disconnected. The silver colored shell of the SCSI connector on the end of the
cable is connected to ground and is safe to touch, but the brass colored pins
inside eventually lead to the SCSI interface chip and are vulnerable. One should
discharge static from one's body before touching SCSI connectors by touching
the 1/4" jacks on the rear of the Kurzweil or another grounded metal object. Any
devices connected to the SCSI bus should be turned off when plugging or
unplugging SCSI cables.
momentary short circuits, which can result in damage to the internal circuitry of
your SCSI device. The only damage that usually occurs to SCSI hardware comes
from static electricity "zapping" SCSI connector pins when the cables are
disconnected. The silver colored shell of the SCSI connector on the end of the
cable is connected to ground and is safe to touch, but the brass colored pins
inside eventually lead to the SCSI interface chip and are vulnerable. One should
discharge static from one's body before touching SCSI connectors by touching
the 1/4" jacks on the rear of the Kurzweil or another grounded metal object. Any
devices connected to the SCSI bus should be turned off when plugging or
unplugging SCSI cables.
2.
Including a minimum of 1 foot for internal cabling of each device in the chain,
the total length of the chain should not exceed 18 feet. There are some people
who suggest that you shouldn't go over 10 feet, but in our experience, if you use
good cables and follow the rules of SCSI, you can create a chain up to 18 feet in
length (which is what the SCSI specification says is allowed).
who suggest that you shouldn't go over 10 feet, but in our experience, if you use
good cables and follow the rules of SCSI, you can create a chain up to 18 feet in
length (which is what the SCSI specification says is allowed).
3.
No single cable length in the chain should exceed 8 feet.
4.
The first and last device in the chain must be terminated.
Poor termination is a common cause of SCSI problems. Having more than two
terminators on the bus will overload the bus drivers. This will not cause
permanent damage to the hardware. However, poor termination can corrupt the
data on your disk.
terminators on the bus will overload the bus drivers. This will not cause
permanent damage to the hardware. However, poor termination can corrupt the
data on your disk.
There are two "exceptions" to this rule. If the chain is less than 18 inches only 1
terminator is needed. If the chain is 10 feet or more, the chain may need to be
terminated at the 10 feet point, using a pass through terminator. The reason that
we say you "may need" to do this is that we have found that some people don't
seem to require a third terminator, while others can't get a longer SCSI chain to
work without one.
terminator is needed. If the chain is 10 feet or more, the chain may need to be
terminated at the 10 feet point, using a pass through terminator. The reason that
we say you "may need" to do this is that we have found that some people don't
seem to require a third terminator, while others can't get a longer SCSI chain to
work without one.
The Kurzweil comes internally terminated, and so you will normally want it to be
on one end of the chain. The K2000 keyboard must be at the end of the chain
since it has only one SCSI port. (If you are hooked up in a chain with a computer,
on one end of the chain. The K2000 keyboard must be at the end of the chain
since it has only one SCSI port. (If you are hooked up in a chain with a computer,