Date: Tue, 30 May 2000 20:40:34 +0200 (CEST) From: =?ISO-8859-1?Q?G=E9rard_Roudier?= <groudier@club-internet.fr> To: Lee Cremeans <lcremeans@erols.com> Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: Symbios dual ultra-wide woes Message-ID: <Pine.LNX.4.10.10005302020001.1359-100000@linux.local> In-Reply-To: <20000529202320.A403@lcremeans.erols.com>
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On Mon, 29 May 2000, Lee Cremeans wrote:
> 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.
>=20
> Here's how my setup works:
> =20
> ID 5 ID 6
> +-----------------+ +-----------------+
> | UMAX scanner |----narrow SCSI---| Archive DDS-1 |
> | (Astra 1220S) | =09 | |
> +-----------------+---terminator +-----------------+
> =09=09=09=09=09=09 |
> =09=09=09=09=09=09 |
> CS Electronics 68-pin VHDCI<->50-pin Amphenol cable -->|
> =09=09=09=09=09=09 |
> =09=09=09=09 +----------------------+
> =09=09=09=09 | (ext 68-pin) |
> =09=09=09 | SYM22801 channel B |=09
> =09=09=09=09 | |
> =09=09=09=09 | (int 50-pin) |
> =09=09=09=09 +----------------------+=09
> =09=09=09=09=09=09|
> =09=09=09=09=09=09| ID 4
> =09=09=09=09 +----------------------+
> =09=09=09=09 | TEAC CD-R55S=09 |
> =09=09=09=09 |=09 (terminated)=09 |
> =09=09=09=09 +----------------------+
> Now, here's the interesting part.=20
>=20
> - When I have *only* the external cable connected, the channel works with=
out
> errors.
>=20
> - When I have *only* the CD-R55 connected, it also works fine.=20
>=20
> - If I have the external stuff on channel A, and the internal stuff on
> channel B (or vice versa), that works.
>=20
> - However, when I have both connected to channel B, I get this mess:=20
>=20
> sym1:4: ERROR (0:48) (2-21-0) (f/35) @ (scriptb 2e8:11000020).
^
This '8' means `SCSI GROSS ERROR'
When such error happens, it is likely the SCSI BUS that is not good enough
or has flaws.
> sym1: script cmd =3D 88080000
> sym1: regdump: da 10 80 35 47 0f 04 0a 01 02 00 21 80 01 09 00 00 52 dc 0=
1
> 08 ff ff ff.
> (noperiph:sym1:0:-1:-1): SCSI BUS reset detected.
>=20
> over and over again, until I reboot the machine. I've not yet tried the o=
ld
> ncr driver on it.
In my opinion, miracle will not occur with the `ncr', but this should be
tried anyway.
> I've tried setting the channel switches to INT50 ON and
> HIGH TERM ON, but to no avail.
HIGH TERM ON / LOW TERM OFF looks correct. I donnot have the doc of this
controller, but if it is possible to also force the other terminator part
to OFF, this could not be bad. I don't know what INT50 ON means.
> 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?=20
I would suspect the following causes in that order:
- The auto-termination stuff of the controller being confused by the
external 68-50 converter.
- The scanner making some shit on the BUS.
- A not good enough or just bad cable chunk or terminator.
- A flaw or unexpected feature of the 68-50 converter.
Regards,
G=E9rard.
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