3 messages in org.freebsd.freebsd-scsiRE: Symbios dual ultra-wide woes| From | Sent On | Attachments |
|---|---|---|
| Lee Cremeans | May 29, 2000 5:22 pm | |
| Gérard Roudier | May 30, 2000 11:40 am | |
| Delaney, Pam | May 30, 2000 11:54 am |
| Subject: | RE: Symbios dual ultra-wide woes | |
|---|---|---|
| From: | Delaney, Pam (pdel...@lsil.com) | |
| Date: | May 30, 2000 11:54:13 am | |
| List: | org.freebsd.freebsd-scsi | |
Lee -
The 22801 specifically prohibits using the configuration you show. You can use all narrow or all wide, but cannot mix wide and narrow (in general).
If the 22801 is at the end of the bus, termination at the board is enabled. If the 22801 is in the middle of the bus, the board will terminate the upper 9 lines if the cable is narrow, otherwise no termination is used. You have a wide cable and a narrow cable, the board hardware defaults to the wide bus case and provides no termination at all. Thus the upper 9 lines are floating.
Options: 1) Use different channels (the board will autoterminate each channel). 2) Get a cable that terminates the upper 8 bits. I checked the web and CS electronics does manufacture a cable (T68D I think) that is a 68->50 with termination at both ends. You will need something like: term ---68->50 cable---term Cables that terminate only one end will not work, because the signal being applied to the 22801 has to look like it is coming from a narrow bus.
-pamela
-----Original Message----- From: Lee Cremeans [mailto:lcre...@erols.com] Sent: Monday, May 29, 2000 7:23 PM To: free...@FreeBSD.ORG Subject: Symbios dual ultra-wide woes
I just got a Symbios SYM22801 (53C876-based) card handed to me last week, and I decided to put it in my machine to replace a less-capable Adaptec AVA-2904. I've run into an interesting problem. I'm not sure if it's cabling-related or not, but the cables do seem to make a difference.
Here's how my setup works:
ID 5 ID 6 +-----------------+ +-----------------+ | UMAX scanner |----narrow SCSI---| Archive DDS-1 | | (Astra 1220S) | | | +-----------------+---terminator +-----------------+ | | CS Electronics 68-pin VHDCI<->50-pin Amphenol cable -->| | +----------------------+ | (ext 68-pin) | | SYM22801 channel B | | | | (int 50-pin) | +----------------------+ | | ID 4 +----------------------+ | TEAC CD-R55S | | (terminated) | +----------------------+
Now, here's the interesting part.
- When I have *only* the external cable connected, the channel works without errors.
- When I have *only* the CD-R55 connected, it also works fine.
- If I have the external stuff on channel A, and the internal stuff on channel B (or vice versa), that works.
- However, when I have both connected to channel B, I get this mess:
sym1:4: ERROR (0:48) (2-21-0) (f/35) @ (scriptb 2e8:11000020). sym1: script cmd = 88080000 sym1: regdump: da 10 80 35 47 0f 04 0a 01 02 00 21 80 01 09 00 00 52 dc 01 08 ff ff ff. (noperiph:sym1:0:-1:-1): SCSI BUS reset detected.
over and over again, until I reboot the machine. I've not yet tried the old ncr driver on it. I've tried setting the channel switches to INT50 ON and HIGH TERM ON, but to no avail.
I could put the CD-R on channel A for now, but when I get a SCSI disk to go there, I want to reserve channel A for it and other-high speed stuff, and channel B for the slow things. Any idea what's going on here?
-lee
-- +--------------------------------------------------------------------+ | Lee Cremeans -- Manassas, VA, USA (WakkyMouse on WTnet) | | lcre...@erols.com | http://wakky.dyndns.org/~lee |
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