home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!munnari.oz.au!uniwa!mjuschke
- From: mjuschke@tartarus.uwa.edu.au (Michael Juschke)
- Newsgroups: comp.sys.atari.st.tech
- Subject: Re: AdSCSI Micro Hostadaper trouble
- Date: 16 Dec 1992 10:53:22 GMT
- Organization: The University of Western Australia
- Lines: 69
- Message-ID: <1gn1r2INN5rn@uniwa.uwa.edu.au>
- References: <1g3ursINN9kp@uniwa.uwa.edu.au> <1992Dec09.144525.20771@bnr.ca>
- NNTP-Posting-Host: tartarus.uwa.edu.au
-
- >bjgrier@bnr.ca (Brian Grier) writes:
-
- >> Most suitable SCSI drives are now manufactured in permanent parity enable
- >> as it is used with most PC's. It was only possible for me to get an
- >> affordable drive as there were some old stock of drives availabe at one
- >> supplier. One supposedly jumpered drive I ordered turned out with enabled
- >> parity and no jumper, as it was already a newer model.
-
- >Well is it EVEN or ODD parity that is enabled? It does make a difference.
- >BTW what is suitable? Quantum, Maxtor, Seagate, Conner, and Micropolis
- >drives are still all selectable for EVEN, ODD, or NO parity.
-
- Well, it doesn't tell. What it says in the specs I have seen is a jumper
- which is labled PE and it says 'parity enabled' , that's all !
-
- Suitable is a drive in the price range below $AUS 1000 which is
- low-profile and will fit into a Mega. I had no trouble finding drives with
- PE jumpers in the range $1500-4000. You might have that kind of money, I don't.
-
- Also, I bought a Conner 60Mb harddrive which has NO PARITY JUMPER and
- does NOT work ! I ordered a Quantum 85 MB which was supposed to be
- usable, it turned out to be a newer model WITHOUT A PARITY OPTION.
- It DID NOT WORK either !
-
- So, NOT ALL of the drives you name are selectable, at least not in Australia.
-
- >> Can anybody give me a convincing reason why these adapters are manufactured for
- >> no parity when the world of SCSI drives (PC's) operate with enabled parity ?
-
- >PC's are not the only users of SCSI drives. Sun, HP, DEC, and Commodore are
- >a few of the companies that make SCSI controllers that do not require parity.
- >PC's have arrived relatively late to the SCSI standard, and the PC SCSI controller
- >cards I have seen have a jumper you can change from their standard parity to
- >whatever you want. Besides the SCSI spec says that parity mst be selectable.
- >So if what you say is true then write the PC SCSI card developers and tell
- >them to follow the SCSI/SCSI II standard.
-
- Tell this to the shops that are around here, most of them sell PC's only
- or Mac's. Most shops sell SCSI's low-profile only above 300Mb. And as before,
- there are so-called SCSI drives (Conner 60, Quantum 85) which DO NOt have the
- jumper.
-
- >> The other question is about the fact that I have been told that a high
- >> percentage of Micro adapters are faulty out of the box.
-
- >I own three host adapters and the only on I've replaced was the 1987 one
- >that does not have the correct interface drivers for the STe and TT.
- >They all worked right out of the box first time. Now the Micro host
- >adapters are only used in MegaSTs, and are not useable on the keyboard
- >case ST or any STe or TT, so you may be right.
-
- Well, one of the importers here told me that they have a high percentage
- of micro adapters which do not work out of the box. Maybe it's bad
- transport, I don't know, you guys don't have them to get shipped over. FACT is,
- mine did not work when I bought it !
-
- >> PS. : To all third party and Atari manufacturers. Think before you build and
- >> consider that your product is not the only thing that somebody adds to
- >> his system.
-
- >Think, and get the facts before you try to chastise others.
-
-
- >Brian, WS1S
- >Bell Northern Research
- >Research Triangle Park, NC
-
-
- Michael
-