LSI SYM8953U Manuale Utente Scaricare il pdf (Pagina 24)

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2-8 Installing the SYM8953U Host Adapter

You can connect up to four devices if they are evenly spaced on a

3-meter Ultra SCSI cable (0.75 m between devices). Your SE SCSI bus

should not exceed 3 meters (total internal and external cable lengths),

even with fewer than four devices.

For LVD applications, you can connect up to 16 devices including the

host adapter if they are evenly spaced on a 12-meter Ultra SCSI cable

(0.19 m minimum between devices).

Table 2.2 SCSI Bus Lengths

Maximum Bus Length, Meters

1. This parameter may be exceeded in point-to-point and engineered

applications.

SE Differential LVD

Maximum #

of Devices

SCSI-1 6 25 12 8

Fast SCSI 3 25 12 8

Fast Wide SCSI 3 25 12 16

Ultra SCSI 1.5

2. Additional spacing rules apply.

25 12 8

Ultra SCSI 3

––4

Wide Ultra SCSI – 25 12 16

Wide Ultra SCSI 1.5 – – 8

Wide Ultra SCSI 3 – – 4

Ultra2 SCSI Note

3. SE and high power differential are not defined at Ultra2 speeds.

Note

12 8

Wide Ultra2 SCSI Note

Note

12 16

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LSI SYM8953U Manuale Utente Pagina 24