palowoda@megatest.UUCP (Bob Palowoda) (09/20/89)
Ok who is useing the Mylex DC376 SCSI Controller on a UNIX/XENIX machine.
I'm interested to hear what the throughput is. The controller looks
to be fairly new. This is what the ad says about it.
* Has an onboard 80376.
* The card uses the 32bit slot for 32bit IO
* 13 Megabytes/sec transfer rate
* Effective average .3ms seek
(I hate when they say effective)
* Emulates a WD controller (no special boot proms needed)
* Software support for DOS, UNIX, Xenix and Nobell
* Cache memory on board 1 or 4 meg simm modules.
They didn't say total size but from the picture it looks like
you can put 4 modules in.
* Supports up to 7 SCSI drives, CD-roms, scanners etc etc.
* They say the 32bit IO operates at 25 to 33Mhz.
Seems like a hot controller. Might be on the expensive side.
If anyone can please post what the real performance of the
controller is.
If anyone's serious about buying one of these
Mylex Phone numbers:
800-446-9539 outside ca.
415-656-7857 inside ca.
This is not meant to sound like an ad. I have nothing to do with
Mylex or their products.
I would like to see some benchmarks compareing the DTP ESDI
Cacheing controller vs the Mylex SCSI Cacheing controller.
---Bob
--
Bob Palowoda *Home of Fiver BBS* login: bbs
Work: {sun,decwrl,pyramid}!megatest!palowoda
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BBS: (415)623-8809 2400/1200 (415)623-8806 1200/2400/9600/19200larry@nstar.UUCP (Larry Snyder) (09/21/89)
> Ok who is useing the Mylex DC376 SCSI Controller on a UNIX/XENIX machine. > I'm interested to hear what the throughput is. The controller looks > to be fairly new. This is what the ad says about it. Hi Bob. I have a friend in Indianapolis who just picked up one of the new Mylex 33mhz motherboards with 4 megs and their 32 bit SCSI controller to configure and run SCO 2.3.2. After he gets this box up and running, he will be tied into this (and other) newgroups and should be able to shed some light. Does ESIX directly support the 16550A in their ASY drivers? I wish that SCO did. -- Larry Snyder SCO Xenix 2.3.2 '386 uucp: iuvax!ndcheg!ndmath!nstar!larry The Northern Star Usenet Distribution Site HST / PEP / V.22 Notre Dame, Indiana USA Home of the fighting Irish!
palowoda@fiver.UUCP (Bob Palowoda) (09/23/89)
From article <111006@nstar.UUCP>, by larry@nstar.UUCP (Larry Snyder): > > Hi Bob. I have a friend in Indianapolis who just picked up one of the > new Mylex 33mhz motherboards with 4 megs and their 32 bit SCSI controller I will also have access to one in a week or two. What I need is a good benchmark to test it out. Does anyone know out in netland if such a piece of software exsists? > Does ESIX directly support the 16550A in their ASY drivers? I wish > that SCO did. If what your asking do they enable the FIFO in thier ASY drivers, no. I don't think any of the UNIX suppliers or multi-port serial board suppliers do. Of coarse thier is that asy driver you downloaded that will enable it. I'm suprised they don't offer it. I have had too many problems with ESIX's tty drivers. Actually the problems are nothing but setting up the correct conditions. ---Bob -- Bob Palowoda packbell!indetech!palowoda *Home of Fiver BBS* login: bbs Home {sun|dasiy}!ys2!fiver!palowoda (415)-623-8809 1200/2400 Work {sun|pyramid|decwrl}!megatest!palowoda (415)-623-8806 2400/9600/19200 TB Voice: (415)-623-7495 Public access UNIX XBBS
larry@nstar.UUCP (Larry Snyder) (09/23/89)
> I don't think any of the UNIX suppliers or multi-port serial board > suppliers do. Of coarse thier is that asy driver you downloaded that The X5 kernel configuration kit that Interactive (in California - Hollis claims that they have never heard of it) directly supports the 16550A FIFO buffering. -- Larry Snyder uucp: iuvax!ndcheg!ndmath!nstar!larry The Northern Star Usenet Distribution Site Notre Dame, Indiana USA
nvk@ddsw1.MCS.COM (Norman Kohn) (09/24/89)
In article <8191@megatest.UUCP> palowoda@megatest.UUCP (Bob Palowoda) writes: > > Ok who is useing the Mylex DC376 SCSI Controller on a UNIX/XENIX machine. I'd be a bit concerned: the board has an on-board cache, and therefore can upset unix's notions of what order to do disk writes in. You might therefore incur a hard-disk inconsistency unfixable by fsck if the system crashes in between writes. I'd want to hear that the board had satisfied the driver writer before I'd be comfortable bringing it up. -- Norman Kohn | ...ddsw1!nvk Chicago, Il. | days/ans svc: (312) 650-6840 | eves: (312) 373-0564
steve@nuchat.UUCP (Steve Nuchia) (09/25/89)
In article <653@fiver.UUCP> palowoda@fiver.UUCP (Bob Palowoda) writes: >From article <111006@nstar.UUCP>, by larry@nstar.UUCP (Larry Snyder): >> Does ESIX directly support the 16550A in their ASY drivers? I wish >> that SCO did. >Actually the problems are nothing but setting up the correct >conditions. No, there is more to it than turning on the FIFO's. A driver that was written without considering a FIFO will in general not try to do enough work on each interrupt. To take full advantage of the 550A's fifo you have to make different tradeoffs than you do for 8250's. In particular, if you know you are likely to be working with 4-16 characters at a time you spend a lot more code setting up pointers and such than you will if you expect 1, sometimes 2 characters. Some drivers will even return from the interrupt service routines before completely filling/emptying the queues. -- Steve Nuchia South Coast Computing Services uunet!nuchat!steve POB 890952 Houston, Texas 77289 (713) 964 2462 Consultation & Systems, Support for PD Software.
palowoda@fiver.UUCP (Bob Palowoda) (09/25/89)
From article <111016@nstar.UUCP>, by larry@nstar.UUCP (Larry Snyder): >> I don't think any of the UNIX suppliers or multi-port serial board >> suppliers do. Of coarse thier is that asy driver you downloaded that > > The X5 kernel configuration kit that Interactive (in California - > Hollis claims that they have never heard of it) directly supports > the 16550A FIFO buffering. I stand corrected, I poked around a bit and in asy.h thier is defines for the fifo on the 16550. On ESIX it's enabled every 8 characters. I was thinking about what you said about the comport not working properly under vpix at 38400. I seem to have problems anywhere > 9600. I wonder if vpix uses the fifo on the 16550 or if thier is any dos software that would use it to help soulve this problem. ---Bob -- Bob Palowoda packbell!indetech!palowoda *Home of Fiver BBS* login: bbs Home {sun|dasiy}!ys2!fiver!palowoda (415)-623-8809 1200/2400 Work {sun|pyramid|decwrl}!megatest!palowoda (415)-623-8806 2400/9600/19200 TB Voice: (415)-623-7495 Public access UNIX XBBS
cliffhanger@cup.portal.com (Cliff C Heyer) (09/26/89)
Hopefully the Mylex will give 386 land the *first* board that gives 900KB/sec disk I/O like the Amiga (at Amiga prices hopefully)
davef@lakesys.UUCP (Dave Fenske) (09/26/89)
A couple of points on Mylex. First, the company is a public company. They have been in business for a while. The offer a two year warranty on all their products (Compaq gives 90 days). As for the question of the DC376 using the "AT32" bus being non-standard. Well, it is honestly no more non-standard than the memory cards in all of the different 386 boxes out there now, and frankly that doesn't seem to be much cause for concern. Mylex, I'm told, will be releasing EISA versions of their network card and the disk controller later this year (when EISA becomes available). Considering the dozens of computer manufacturers out there, I am rather pleased that one, at least, has done something NOW, to address higher performance.
karl@ddsw1.MCS.COM (Karl Denninger) (09/27/89)
In article <22542@cup.portal.com> cliffhanger@cup.portal.com (Cliff C Heyer) writes: >Hopefully the Mylex will give 386 land the >*first* board that gives 900KB/sec disk I/O >like the Amiga (at Amiga prices hopefully) That's funny... The WD1007/WA2 has been clocked here at 950KB/second (ESDI 10 Mhz). I understand that the WD1008 (15Mhz ESDI) has been clocked at over 1300KB/second, although I haven't seen that one myself. The DPT boards have been clocked at that rate (950KB/sec) on cache misses. On cache hits the DPT board is off the top of scale on our tests; that is in excess of 4MB/sec! While the Mylex board may very well be nice, it's a bummer that it's limited to the Mylex motherboards....of course, given the differences in 32-bit slots I understand the limitations... -- Karl Denninger (karl@ddsw1.MCS.COM, <well-connected>!ddsw1!karl) Public Access Data Line: [+1 312 566-8911], Voice: [+1 312 566-8910] Macro Computer Solutions, Inc. "Quality Solutions at a Fair Price"
misha@aeras.UUCP (Michael Umansky) (09/28/89)
In article <22542@cup.portal.com> cliffhanger@cup.portal.com (Cliff C Heyer) writes: >Hopefully the Mylex will give 386 land the >*first* board that gives 900KB/sec disk I/O >like the Amiga (at Amiga prices hopefully) In my 25Mhz Micronics with 8Mhz AT bus and Adaptec AHA-1542A SCSI controller and CDC WREN III SCSI drive I get about 900 KB/sec. The Mylex controller should deliver at least a magnitude more to be cost effective. misha -- NAME: Michael Umansky (sun!aeras!foxy!misha) WORK: Arix Corp.; 821 Fox Lane; San Jose, CA 95131 HOME: 4331 Lincoln Way; San Francisco, CA 94122 PHONE: (408) 922-1751 (work); (415) 564-3921 (home)