[5184] in linux-scsi channel archive
More Termination questions
daemon@ATHENA.MIT.EDU (Steve Logue)
Thu Nov 19 15:07:55 1998
Date: Thu, 19 Nov 1998 03:31:52 -0800
From: Steve Logue <stevel@mail.cdsnet.net>
To: linux-scsi@vger.rutgers.edu
--------------E2D5247A026901A1616EEED9
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Hello Readers,
I have an Adaptec 2940UW and have an internal 68-pin HDD attached.
Additionally, I have an internal CDROM, and a scanner attached. The scanner is
attached to my internal 50-pin cable via a converter to convert IDC50 to HD50 and
then another converter to convert from HD50 to DB25, and I have a DB25 passive
terminator on the scanner. This is setup this way because I wanted to avoid
using a second SCSI card for external devices. (You can only use two out of
three connections on my card and I am using both the internal connectors.) Total
cable length to the scanner is 7 feet. The internal cable is four feet, and I
have three feet of cable between the two converters listed above.
2ft 2ft 3ft
[card]-->[cdrom]-->[converter]-->[converter]-->[scanner]-->[terminator]
IDC50 IDC50 HD50
My problem is that I am getting very unreliable performance from the scanner.
Sometimes it works, and sometimes it doesn't. It will work everytime for one
time immediately after boot, and then things get weird. Have I done something
wrong cabling wise? Will a DB25 passive terminator properly terminate my setup,
or do I need to get a passthrough terminator and terminate just before I change
to DB25? Are there any SCSI test programs to help me diagnose whether SANE is to
blame or my SCSI setup and how??????
Please email me direct too.
Thanks,
-STEVEl
--------------E2D5247A026901A1616EEED9
Content-Type: text/html; charset=us-ascii
Content-Transfer-Encoding: 7bit
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
Hello Readers,
<p>I have an Adaptec 2940UW and have an internal 68-pin HDD attached.
Additionally, I have an internal CDROM, and a scanner attached.
The scanner is attached to my internal 50-pin cable via a converter to
convert IDC50 to HD50 and then another converter to convert from HD50 to
DB25, and I have a DB25 passive terminator on the scanner. This is
setup this way because I wanted to avoid using a second SCSI card
for external devices. (You can only use two out of three connections
on my card and I am using both the internal connectors.) Total cable
length to the scanner is 7 feet. The internal cable is four feet,
and I have three feet of cable between the two converters listed above.
<p><tt> 2ft
2ft 3ft</tt>
<br><tt>[card]-->[cdrom]-->[converter]-->[converter]-->[scanner]-->[terminator]</tt>
<br><tt> IDC50 IDC50
HD50</tt>
<br><tt></tt>
<p>My problem is that I am getting very unreliable performance from the
scanner. Sometimes it works, and sometimes it doesn't. It will
work everytime for one time immediately after boot, and then things get
weird. Have I done something wrong cabling wise? Will a DB25
passive terminator properly terminate my setup, or do I need to get a passthrough
terminator and terminate just before I change to DB25? Are there
any SCSI test programs to help me diagnose whether SANE is to blame
or my SCSI setup and how??????
<p>Please email me direct too.
<p>Thanks,
<br>-STEVEl</html>
--------------E2D5247A026901A1616EEED9--
-
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.rutgers.edu
