Date: Thu, 19 Sep 1996 00:34:48 -0700 From: "Michael L. VanLoon -- HeadCandy.com" <michaelv@MindBender.serv.net> To: Michael Smith <msmith@atrad.adelaide.edu.au> Cc: danj@netcom.com (Dan Janowski), current@freebsd.org Subject: Re: Various drivers... Message-ID: <199609190734.AAA07769@MindBender.serv.net> In-Reply-To: Your message of Thu, 19 Sep 96 11:36:08 %2B0930. <199609190206.LAA07511@genesis.atrad.adelaide.edu.au>
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>(redirected to -hardware list, where this belongs. All of us with
> opinions on hardware hang out here 8)
>
>Dan Janowski stands accused of saying:
>>
>> -current and SCSI:
>>
>> Does the buslogic driver support (in addition to the BT-946)
>> the BT-948,958,956? If not, are there plans?
The BT946 and BT956 are definitely supported (I've used a BT956 on
NetBSD for several months, and the driver is very similar). I see no
reason why the BT948 and BT958 wouldn't work, although they might only
run in "non-Ultra" mode. I've personally never tried to run the Ultra
cards.
>Justin Gibbs (gibbs@freebsd.org) is the person to talk to about this.
>I wouldn't, at this point in time, recommend using a Buslogic
>controller.
The BusLogic cards work just fine, and are very stable.
>> Are there any opinions about which SCSI board works best
>> with -current for performance.
>The Adaptec 2940 range, hotly followed by cards using the NCR
>53c8xx range of chips. Both of these support tagged queueing,
>which gives them a huge advantage over the Buslogic driver, which
>(AFAIK) currently does not.
If you have drives that support tagged-command-queuing correctly (most
modern SCSI drives made in the last year or two), you can get better
performance out of an Adaptec 2940(UW) with tags enabled.
Without tagged-command-queuing turned on, the Adaptec and BusLogic
cards are almost identical in performance.
The NCR (Symbios) 53c8xx cards are also good alternatives, and are
relatively inexpensive. If you can find one of these for your
motherboard, they can usually be purchased for less than the Adaptec
and BusLogic counterparts. Their performance should be about the same
as what I just described for the Adaptec.
>> What is/are the SCSI board(s) that get the most on-going
>> attention, and are therefore the best investments?
>The two above, again.
The three above, again. Although the Adaptec recently seems to be
getting the most consistent attention.
-----------------------------------------------------------------------------
Michael L. VanLoon michaelv@MindBender.serv.net
--< Free your mind and your machine -- NetBSD free un*x >--
NetBSD working ports: 386+PC, Mac 68k, Amiga, Atari 68k, HP300, Sun3,
Sun4/4c/4m, DEC MIPS, DEC Alpha, PC532, VAX, MVME68k, arm32...
NetBSD ports in progress: PICA, others...
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