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INTRODUCTION
The Seagate STD224000N is a 5^1/4" internal DDS3 DAT drive with a 12/24Gb capacity. The STD124000N is 3^1/2" sized, and the STD624000N is the external version.
The following tables and notes give a quick guide in setting up the Seagate 12/24Gb DAT drive..

CONFIGURING YOUR TAPE DRIVE
Locate the dip-switches by turning the tape drive upside down with the front bezel facing towards you.  The dip-switchbank is positioned on the right hand side of the tape drive.
The Seagate STD224000N is despatched with factory default settings, as shown in the table below.
You should find that only the SCSI ID needs to be altered to suit your system (read below for full SCSI ID variations and instructions on achieving them).
Once this as been completed, the drive may need to be terminated (depending on your system), see SCSI TERMINATION below.

Default Seagate STD224000N 12/24Gb Dip Switch Settings
OFF ON	S10	S9	S8	S7	S6	S5	S4	S3	S2	S1
	Reserved		Self Test	Inquiry String	DDS Pass Through. Compression	Parity	MRS Mode	SCSI ID SELECTION			SCSI ID
								OFF	OFF	OFF	0
Switch 6 (COMPRESSION) When OFF=24Gb, ON=12Gb) Switch 5 (PARITY) Enable or Disable parity checking on the SCSI bus. Switch 4 (MRS MODE) If ON the drive reads or writes both MRS and non-MRS 4mm media. if OFF, the drive reads and writes to MRS media and reads from but does not write to 4mm media.) Switches 1-3 (SCSI ID) The three switches correspond to the SCSI ID. Each SCSI device on a bus must have a unique SCSI ID. The highlighted example shows SCSI ID 5.  ON OFF ON (4 + 0 + 1 = 5)								OFF	OFF	ON	1
								OFF	ON	OFF	2
								OFF	ON	ON	3
								ON	OFF	OFF	4
								ON	OFF	ON	5
								ON	ON	OFF	6
								ON	ON	ON	7

SCSI TERMINATION
If you're unsure whether you need to terminate your tape drive, refer to the SCSI termination page
To set the SCSI termination and SCSI power on a Seagate STD224000/STD124000N tape drive, you must look to the rear of the drive.  There you will see, above the SCSI interface and power connection, a 16 pin jumper block.   Ensure that only pins 11 and 12 (SCSI TERMINATION) and pins 15 and 16 (SCSI TERMINATION POWER) are jumpered.  The diagrams below show both the position of the jumper block and the jumper block in greater detail.

SCSI CONNECTION
The Seagate STD224000N / STD124000N 12/24Gb needs to be connected to a SCSI controller card. A low cost card, such as an Adaptec 1505, is suitable for this task.  However the Adaptec 1505 will only control the one SCSI device.

Routine Maintenance
If excessive magnetic dust or debris collects at one or more of the tape heads, your drive may not be able to read from or write to tape.  To avoid this situation, you must clean the tape heads on your DAT drive in the following circumstances:
  After the first four hours of tape movement of a new cartridge
  After every 25 hours of read/write operation.
  Whenever the rectangular, green cartridge-status LED flashes during operation.

Note. A slowly flashing green LED may indicate that a tape is damaged or is nearing the end of it's life.  if cleaning the head does not correct the flashing LED condition, replace the cartridge.  the slowly flashing LED does not indicate a loss of data, nor does it, indicate SCSI problems.

To clean the tape heads on your drive, use a DDS DAT cleaning cartridge.  After you insert the cartridge, the drive detects that the cartridge is a cleaning cartridge, then loads and runs the cartridge for about 30 seconds.   When cleaning is complete, the drive ejects the cartridge.
Each time the cleaning cartridge is loaded, a new, unused portion of cleaning tape is advanced over the entire tape path.  The drive does not rewind a cleaning cartridge.   After about 30 cleaning cycles, the entire tape is used, and you must purchase a new cleaning cartridge.
If you insert a cleaning tape that has been used up, the drive ejects the tape without completing a cleaning operation, this process takes just under 25 seconds.