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- Path: sparky!uunet!olivea!decwrl!pa.dec.com!dynamix!david@uu3.psi.com
- From: david@dynamix.com (David L Jarvis)
- Newsgroups: comp.unix.xenix.sco
- Subject: Re: Adaptec 1740 modes.
- Message-ID: <9208290830.AA18784@dynamix.com>
- Date: 29 Aug 92 12:30:35 GMT
- Organization: SOFTWARE / DYNAMIX
- Lines: 63
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- X-In-Reply-To: <1992Aug27.230609.4326@regina.cs.uregina.ca>; from "Timothy Kupp" at Aug 27, 92 11:06 pm
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-
- > I have an Adaptec 1740 installed in a Compaq 486/33M running SCO UNIX
- > 3.2.4. When the machine was initially configured, the Adaptec showed
- > up in the power-up device list as 'type=ad'. According to a list of
- > adapter possibilities available when configuring SCSI devices, 'ad' is
- > an Adaptec running in 154x or 164x mode. 'eiad' is a 174x Adaptec.
-
- the 1740 has two operating modes; standard and enhanced
- the 'eiad' is the enhanced mode driver ... whatever mode driver you use
- should correspond to the mode indicated in the eisa configuration for the
- system
-
- > So, why did the card show up as type 'ad' in the device list? According
-
- because it was installed that way! :-) you can install the standard
- driver (ad) or the enhanced one (eiad) ... they are different ...
-
- > to the Compaq system configuration, the card in that slot is identified
- > as 'AHA1740'.
-
- the card *is* an AHA1740 ... running in standard mode (not enhanced) ...
- the system configuration for the machine should have an option to set the
- card into enhanced mode (at least thats the way it was for the last one I
- did)
-
- > Is there any benefit to reconfiguring the UNIX setup so
- > that the card is identified as type 'eiad' (ie. performance
- > improvement)?
-
- yes, there is a definite performance enhancement
- (see the doc that comes with the 1740)
-
- > If there is a benefit, how would one go about
- > reconfiguring the system so that the card would be recognized as type
- > 'eiad' on power-up?
-
- 1: login as root and cd to /etc/conf/cf.d
- 2: edit the file mscsi, change all occurences of ad to eiad
- 3: cd to /etc/conf/sdevice.d
- 4: edit the file ad, change all occurences ad to eiad
- 5: link_unix
- 6: run your eisa configuration utilities to change the mode of the card
-
- > Can I assume it would be foolish to think I could change the mode of the
- > card without reinstalling UNIX, reconfiguring the hard drives, etc?
-
- you can assume it ... but you'd be wrong ;-)
- the above should guide you thru the steps, but you can also give SCO
- support a call (this is a popular one with them), or pick up a recent SCO
- mag where they wrote up these very same instructions ...
-
- >
- > Any and all input would be appreciated. Thanks.
-
- you're welcome ... good luck
-
- #----------------------------------------------------------------------#
- # David L. Jarvis SOFTWARE / #
- # david@dynamix.com / DYNAMIX #
- #----------------------------------------------------------------------#
-