Adaptec 3940UW User Guide - Page 33

Choosing SCSI Cables

Get Adaptec 3940UW - Storage Controller UW SCSI 40 MBps PDF manuals and user guides View all Adaptec 3940UW manuals
Add to My Manuals
Save this manual to your list of manuals

Page 33 highlights

Installing the PowerDomain 2940UW/3940UW and Connecting SCSI Devices Choosing SCSI Cables Always use high-quality SCSI cables to connect the PowerDomain 2940UW/3940UW to devices on the SCSI chain. Poor-quality cables can cause data corruption and other problems. The round cables used for external SCSI devices vary widely in quality and electrical characteristics. Be sure external SCSI cables meet SCSI-2 standards. (Your cable reseller should be able to verify this.) When purchasing external SCSI cables s Choose external round-shielded cables with a single-ended impedance range of 80 to 110 ohms. s Make sure all cables in the chain have the same wire gauge: at least #28 AWG for the PowerDomain 2940UW and at least #30 AWG for the PowerDomain 3940UW. (The gauge is usually printed on the cable.) Note: Adaptec sells high-quality internal and external SCSI-2 cables, which you can purchase by calling Adaptec at the number listed on page iii. To assure reliable operation, the total length of the SCSI chain, including both internal and external cabling, should not exceed 6 m (19.5 ft). When calculating the total length of the SCSI chain, consider the following: s The length of cables inside external cases. A drive might have up to 12 in. of cabling inside. s The number of connections. One connection equals approximately 6 in. 2-21 AAAAAAAAAAAAAAAAAPSPCAAAAAArotuoiAAAwrncAAArtekAAAeSrAAAnNDAAAptAAAeuoDAAAcmmAAAaAAANtbaeAAAieu:AAAnrmAAA2:2AAA/5bAAA921eAAA04r0AAA/0:AAA98U4AAA66AAA9W4AAA3-AAA0/7AAA304AAA9,2AAA4R-AAA00AAAeU0AAAvAAAW.AAABAAAAAAUAAAsAAAeAAArAAA'AAAsAAAEGAAACAAAuAAANiAAAdAAAeDAAAAAAaAAAPtAAAeaAAA:gAAA2AAAe/AAA:2AAA27AAA-/AAA29AAA16AAAAAAAAAAAAAAAAAAAA

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
2-21
Installing the PowerDomain 2940UW/3940UW and Connecting SCSI Devices
PowerDomain 2940UW/3940UW User’s Guide
Stock Number: 510864-00, Rev. B
Page: 2-21
Print Spec Number: 493742-00
Current Date: 2/20/96
ECN Date: 2/27/96
Choosing SCSI Cables
Always use high-quality SCSI cables to connect the PowerDomain
2940UW/3940UW to devices on the SCSI chain. Poor-quality
cables can cause data corruption and other problems.
The round cables used for external SCSI devices vary widely in
quality and electrical characteristics. Be sure external SCSI cables
meet SCSI-2 standards. (Your cable reseller should be able to verify
this.)
When purchasing external SCSI cables
■
Choose external round-shielded cables with a single-ended
impedance range of 80 to 110 ohms.
■
Make sure all cables in the chain have the same wire gauge:
at least #28 AWG for the PowerDomain 2940UW and at least
#30 AWG for the PowerDomain 3940UW. (The gauge is
usually printed on the cable.)
Note:
Adaptec sells high-quality internal and external
SCSI-2 cables, which you can purchase by calling Adaptec
at the number listed on page iii.
To assure reliable operation, the total length of the SCSI chain,
including both internal and external cabling, should not exceed
6 m (19.5 ft).
When calculating the total length of the SCSI chain, consider the
following:
■
The length of cables inside external cases. A drive might have
up to 12 in. of cabling inside.
■
The number of connections. One connection equals
approximately 6 in.