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- Newsgroups: comp.sys.sgi
- Path: sparky!uunet!sun-barr!ames!nsisrv!echo.gsfc.nasa.gov!flanigan
- From: flanigan@echo.gsfc.nasa.gov (Dennis Flanigan)
- Subject: Re: SCSI cable length
- Message-ID: <1992Jul24.134310.10624@nsisrv.gsfc.nasa.gov>
- Sender: usenet@nsisrv.gsfc.nasa.gov (Usenet)
- Nntp-Posting-Host: echo.gsfc.nasa.gov
- Organization: NASA GSFC Code 910.1, TRMM Ground Truth
- References: <31493@adm.brl.mil> <nkf86oc@zuni.esd.sgi.com>
- Date: Fri, 24 Jul 1992 13:43:10 GMT
- Lines: 31
-
- In article <nkf86oc@zuni.esd.sgi.com>, olson@anchor.esd.sgi.com (Dave Olson) writes:
- |> In <31493@adm.brl.mil> steve@chaos.ocean.fsu.edu (Steve Van Gorder) writes:
- |>
- |>
- |> | Sorry if this is a FAQ .. but is there a maximum SCSI cable length ?
- |> | I have 3 external devices - 1/4 " tape, a CDROM drive and an optical disk.
- |> | They are daisy-chained to my 4D35 wtih 6 ft, 4 ft and 5 ft cables
- |> | respectively. Also there is a 170 mb internal SCSI drive and a 750 mb SCSI
- |> | drive in the top bay of the 35. Should this be a problem ?
- |>
- |> 6 meters max, and the closer to the max you push it, the more problems
- |> you are likely to have. You are at or over the limit, since there is aprox
- |> 4 ft of cable internal to the 35, and you may have more cable in the
- |> other device enclosures.
- |>
- |> Also, the more connectors you have, the more likely you are to have
- |> a problem, and you have quite a few of them ;)
-
- I have mentioned this SGI to before, but would'nt adding a second SCSI controller
- and then splitting your SCSI devices between the two controllers
- solve a lot of these problems? Unfortunately SGI does not make the
- hardware to do this for a 4D35. Their response was not enough
- customers would buy one, but talk to you your sales rep anyway
- and tell him/her that you want one.
-
- --
- --------------------------------------------------------------------------
- Dennis Flanigan Jr. | Goddard Space Flight Center
- Applied Research Corp. | Code 910.1
- flanigan@echo.gsfc.nasa.gov | (301) 286-6589
- --------------------------------------------------------------------------
-