Seagate STD224000N Installation Manual - Page 10
SCSI ID switches switches S1 through S3 - specifications
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Seagate DAT Drive Installation Manual 6 SCSI ID switches (switches S1 through S3) The three switches S1 through S3 correspond to the SCSI device address identification bits 0 (LSB) through 2 (MSB), respectively. ® Note. Each SCSI device on a bus must have a unique SCSI ID. The SCSI host controller generally uses ID 7. In some systems, the boot drive uses ID 0. Media-recognition system (switch S4) The media-recognition system allows the drive to detect DDS cartridges that support this feature. Use of non-DDS media may appear to give satisfactory results, but the inferior specifications of such media can cause dataintegrity problems. The S4 switch enables or disables media-recognition system (MRS) mode. If S4 is ON, the drive reads or writes both MRS and non-MRS 4-mm media. If S4 is OFF, the drive reads and writes to MRS media and reads from but does not write to 4-mm media. Parity check enable/disable (switch S5) The S5 switch enables or disables parity checking for the SCSI bus. When parity checking is disabled, parity is still generated by the drive. If switch S5 is on, parity checking is enabled. The default setting is parity checking disabled (S5 set to off). DDS pass-through mode enable/disable (switch S6) If switch S6 is on, DDS pass-through is enabled (data compression is disabled). ® Note. The function of the S6 switch can be overridden by the proper SCSI MODE SELECT command issued from the host computer. Inquiry string (switch S7) The S7 switch is used to set the inquiry string used by the drive. It should be left in its factory-default setting (ON).