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тАО09-19-2005 12:31 AM
тАО09-19-2005 12:31 AM
Re: External HA disk enclosure A3312A connected to a V2500
my problem.No terminator on internal scsi connector.Thanks once again surely not my last post.
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тАО09-19-2005 05:50 AM
тАО09-19-2005 05:50 AM
Re: External HA disk enclosure A3312A connected to a V2500
The terminator really is a signal dampener that keeps the data signal from bouncing BACK along the scsi bus.
Why do I bring this up? Because it sounds weird that you "terminate" the scsi cable just as it LEAVES the box. The terminator does NOT terminate good data. The terminator stops good data from reflecting back.
Think of two guys with a rope stretched out between them. One guy pokes the rope. It makes a wave. When it hits the other end, the wave bounces back toward guy 1.
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тАО09-19-2005 06:28 AM
тАО09-19-2005 06:28 AM
Re: External HA disk enclosure A3312A connected to a V2500
"Because it sounds weird that you "terminate" the scsi cable just as it LEAVES the box"
This card have an internal and an external connector for the same bus. Both ends have to be terminated. That's all!
Hope this helps!
Regards
Torsten.
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тАО09-19-2005 07:23 AM
тАО09-19-2005 07:23 AM
Re: External HA disk enclosure A3312A connected to a V2500
Good humor, guys. Thanks Steve, now I'm going to see little Arnold Schwartzenegger faces every time I see a Terminator....
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тАО09-19-2005 08:29 AM
тАО09-19-2005 08:29 AM
Re: External HA disk enclosure A3312A connected to a V2500
As we all know, a scsi bus have to be terminated on both ends.
One end is the last disk. There have to be a terminator.
the other end (or the beginning ;-) can be auto-terminated by the controller or terminated by a terminator.
in this case, there have to be a terminator on the internal connector, because it is only one bus.
in high availability environments (multi-initiator, to servers are sharing one bus) special cables (called inline terminated) are used. The terminator is inside the cable just in front of the controller. It is safe now to disconnect the cable while the other server is using the bus.
Hope this helps!
Regards
Torsten.
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those who understand binary, and those who don't.
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тАО09-19-2005 08:34 AM
тАО09-19-2005 08:34 AM
Re: External HA disk enclosure A3312A connected to a V2500
I actually have those self-terminating cables. They're about two feet long, and black.
I like the plumbing comment above. All I can now think of are imaginary "bit" buckets.
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