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High-Tech Made in Switzerland
MS-MCDISK-D Rev. B
4.4 LED INDICATORS
The MCDISK-D is equipped with three or four LED indicators.
Refer to Figures 4.1 - 4.3 for the location of the indicators.
4.4.1 BASIC INDICATIONS
The green (leftmost) LED is the power indicator. It is lit
whenever the unit has power applied to it.
The two yellow (rightmost) LEDs are the access/lock ("InUse")
indicators for the upper and lower slot (for single slot models:
only one yellow LED). They are illuminated temporarily when-
ever an access to a memory card in any of the slots takes
place. They are illuminated permanently if the card inserted in
this slot is mounted on the host computer as a SCSI bus
volume (the card is "locked" by the host computer).
CAUTION:
Don’t eject the PCMCIA card when the yellow
LED is lit!
The red (middle) LED is the status indicator. It is illuminated
when the MCDISK-D is not operable due to one of the
following reasons:
• There is no card inserted. If a card is inserted correctly, the
red LED will go off.
• There is a card inserted, but it cannot be accessed by the
MCDISK-D. Such errors can have various causes: the unit
is attempting to write to a write-protected or read-only card,
unknown I/O card, hardware error on a memory card, etc.
During start-up (power up or SCSI bus reset), the MCDISK-D
performs some internal self tests. When everything is okay,
the red and (both) yellow indicators will flash twice simultane-
ously to indicate proper start-up and proper SCSI connection.
4.4.2 ERROR SIGNALLING
In case of an error, the red and (both) yellow indicators will
show a diagnostic status:
• The red and (both) yellow indicators remain unlit: Ensure
that the unit is connected correctly to a powered SCSI bus.
Likewise the unit cannot start-up when the SCSI bus is not
or not correctly terminated (TERMPWR O.K.?). If the SCSI
bus is O.K. and the indicators still remain unlit, there may
be a hardware problem and the unit requires service.
• The red and (both) yellow indicators flash only once and
then remain unlit: The internal RAM test has failed. The unit
requires service.
• The error LED flashes repeatedly: There is an SCSI hard-
ware problem.
• The error LED double-flashes repeatedly: This indicates a
severe SCSI bus protocol error that prevents the MCDISK-
D from continuing SCSI operation. The MCDISK-D needs
to be reset to recover from this error. If the error is perma-
nent, check SCSI cabling, terminators and SCSI ID's.
• The error LED triple-flashes repeatedly: The ROM con-
tents are not O.K. The unit requires service.
• The LEDs show some other pattern than those listed
above: There is a serious hardware problem, and the unit
needs to be returned to your local MCDISK supplier for
repair.
