2212msr@whuts.UUCP (ROBIN) (10/01/87)
Could someone in NETLAND please tell me how to define a type 15 drive on an early IBM AT? I've got a Seagate 4051, currently configured as a type 11, but that wastes about 4-5Mbytes. If someone could supply code to write to table that would be even better. Max S. Robin AT&T Bell Laboratories email:whuts!2212msr the ROM table that would be even better.
burton@parcvax.Xerox.COM (Philip M. Burton) (10/02/87)
In article <2955@whuts.UUCP> 2212msr@whuts.UUCP (ROBIN) writes: >Could someone in NETLAND please tell me how to define a type 15 drive on an >early IBM AT? I've got a Seagate 4051, currently configured as a type 11, but >that wastes about 4-5Mbytes. If someone could supply code to write to table that would be even better. Make life easy for yourself. Get DUB-14 from Golden Bow Systems, in San Diego, CA. Supports at least 50 different drives beyondthe ones IBM defined. It consists of two ROM chips that plug into your AT's mommaboard, in the unused sockets. There is also a software install disk that will set up the CMOS config ram and optionally do a low-level format. The implementation is so good that it fools even the IBM dealer diagnostics, that also do low level formatting, etc. I run my AT at 9+ MHZ with an Ariel Speed Injector (another fine product), and the DUB-14 always boots up fine. Just a satisfied customer, as they say .... -- Philip Burton burton@parcvax.xerox.COM ...!hplabs!parcvax!burton Xerox Corp. preferred path: burton.osbunorth@xerox.COM 408 737 4635 ... the usual disclaimers apply ...
ayac071@ut-ngp.UUCP (10/02/87)
In article <2955@whuts.UUCP> 2212msr@whuts.UUCP (ROBIN) writes: >Could someone in NETLAND please tell me how to define a type 15 drive on an >early IBM AT? I've got a Seagate 4051, currently configured as a type 11, but >that wastes about 4-5Mbytes. If someone could supply code to write to table that would be even better. I agree. I have no reference on the drive type or controller compatibility and have found no source for same from any of my resources. Could someone on the net at least give some pointers toward documentation on the drive types (and controller types) supported by the IBM HD BIOS? Thanks. Bill Douglass ayac071@ngp.UUCP
bfag@ur-tut.UUCP (Meneldur) (10/04/87)
>In article <2955@whuts.UUCP> 2212msr@whuts.UUCP (ROBIN) writes: >>Could someone in NETLAND please tell me how to define a type 15 drive on an >>early IBM AT? I've got a Seagate 4051, currently configured as a type 11, but >>that wastes about 4-5Mbytes. If someone could supply code to write to table that would be even better. While I am not intimately familiar with the IBM AT, per se, I do run a Heath H-248 AT clone with which I had a similar problem. While the list of recognized drives was long, it certainly didn't recognize the pair of QUANTUM 2020s I had connected to the WD controller. These are some old, big, 8-inch, 20M hard drives with 512 cylinders and 4 heads that I picked up for $50 each from a local surplus place. Anyway, while this odd drive setup worked fine in my old Heath H-158 XT, the AT disavowed any knowledge of them. Finally, in my setup routine, I told the AT I had NO hard drive at all. I booted up with no disk in A: and behold! I began to hear the familiar chatter of the QUANTUM's heads as the system came up. It was definitely music to my ears! One other point of interest: I discovered the drives were MUCH slower on the AT than the XT. I had to go back and perform a low level format on both drives, raising their interleave factor from 3 to 4. I've had no problems ever since. I do not know that this will be of any assistance to you in your problem, but perhaps it may prove of some help to others. Bill Faggart Dept. of Geological Sciences University of Rochester Rochester, New York 14627
burton@parcvax.Xerox.COM (Philip M. Burton) (10/04/87)
>drives was long, it certainly didn't recognize the pair of QUANTUM 2020s I had >connected to the WD controller. These are some old, big, 8-inch, 20M hard >drives with 512 cylinders and 4 heads that I picked up for $50 each from a >local surplus place. > >Anyway, while this odd drive setup worked fine in my old Heath H-158 XT, the >AT disavowed any knowledge of them. Finally, in my setup routine, I told the > >drives, raising their interleave factor from 3 to 4. I've had no problems >ever since. Unless I've forgotten everything I once knew about disk drives, I thought that Quantum 8" drives used the Shugart SA 1000 interface, which was quite different that the ST506/412 interface. Even the transfer rate was different, 4.34 Mb/sec for the 8" vs 5.0 Mb/sec for the 5 1/4". How did you manage to get the Quantum's to work? Did you use a stock controller?? Did you have to set a jumper? Or, did you have a special version of the Quantums which had the ST506 interface? By the way, please be sure to tell netland how you used an outboard box with a power supply with +24 volts (and -5 or -12V ??). Just a friendly caveat to poor, starving grad students. -- Philip Burton burton@parcvax.xerox.COM ...!hplabs!parcvax!burton Xerox Corp. preferred path: burton.osbunorth@xerox.COM 408 737 4635 ... the usual disclaimers apply ...
hoff@hp-sdd.HP.COM (Tom Hoff) (10/06/87)
In article <2955@whuts.UUCP> 2212msr@whuts.UUCP (ROBIN) writes: >Could someone in NETLAND please tell me how to define a type 15 drive on an >early IBM AT? I've got a Seagate 4051, currently configured as a type 11, but >that wastes about 4-5Mbytes. If someone could supply code to write to table I am using a Seagate 4051, but I have it configured as a type 17. The SETUP.COM program that came with dos 3.1 for my Vectra PC recognizes type 17 and makes the appropriate changes. Sorry, I can't send it to you 'cause it's copywrited but I'm sure someone on the net knows what you need to poke into memory to configure for type 17. I don't know if 17 is an industry standard type, but the Vectra uses Phoenix bios roms. --Tom -- Tom Hoff (...!hplabs!hp-sdd!hoff) "Dammit Jim, I'm a programmer not a spokesman!"
larry@tapa.UUCP (Larry Pajakowski) (10/09/87)
We received by mixup a copy of an Award Bios replacement for early AT's from the Speedstore people. Before senting it back I took a look and it has 40+ different hard disks defined. I believe it is being sold specifically for those who have vintage AT's. The price seems to be about $60 from a discounter. It might be worth looking into. Larry
bfag@ur-tut.UUCP (Meneldur) (10/11/87)
In article <554@parcvax.Xerox.COM> burton@parcvax.xerox.com.UUCP (Philip M. Burton) writes: >>drives was long, it certainly didn't recognize the pair of QUANTUM 2020s I had >>connected to the WD controller. These are some old, big, 8-inch, 20M hard >>drives with 512 cylinders and 4 heads that I picked up for $50 each from a >>local surplus place. >> >>Anyway, while this odd drive setup worked fine in my old Heath H-158 XT, the >>AT disavowed any knowledge of them. Finally, in my setup routine, I told the >> >>drives, raising their interleave factor from 3 to 4. I've had no problems >>ever since. > > >Unless I've forgotten everything I once knew about disk drives, I thought >that Quantum 8" drives used the Shugart SA 1000 interface, which was quite >different that the ST506/412 interface. Even the transfer rate was >different, 4.34 Mb/sec for the 8" vs 5.0 Mb/sec for the 5 1/4". > >How did you manage to get the Quantum's to work? Did you use a stock >controller?? Did you have to set a jumper? Or, did you have a special >version of the Quantums which had the ST506 interface? > >By the way, please be sure to tell netland how you used an outboard box >with a power supply with +24 volts (and -5 or -12V ??). > >Just a friendly caveat to poor, starving grad students. How did you know I was a poor, starving, grad student?? :-) You are quite right about the QUANTUMs -- they are set up for the Shugart interface. A local fellow here who had the spec sheets discovered the drives would work with a Western Digital controller that was fitted with the auto-config ROM. All that was required was making up your own cable to adapt to the 50-pin connector required by the QUANTUMs. As for the power, the same surplus place that had the drives also has some very nice, heavy-duty, fan-cooled power supplies that appeared as though expressly intended for the big 8" drives. They have the same length and width as the QUANTUMs but aren't quite as high. The single power supply is more than enough for the two drives I have. All three are bolted together, lying on their sides, together making up a really heavy package! The power supply, by the way, ran $25. There was one voltage you failed to mention, by the way -- the motors that turn the platters on these suckers take a straight 120V AC! Though big and bulky, I can't complain about my setup. I've never had any trouble with the QUANTUMs once they were up and running (admittedly, it took a little time to get it all wired up). And I certainly can't complain about the price -- 50 bucks each is pretty darn cheap. I recently saw an ad in COMPUTER SHOPPER for used QUANTUM 2020s. They were selling the suckers for nearly $500! Good grief! Bill Faggart Dept. of Geological Sciences University of Rochester Rochester, New York 14627
jons@islenet.UUCP (Jonathan Spangler) (10/11/87)
In article <950@hp-sdd.HP.COM> hoff@hp-sdd.UUCP (Tom Hoff) writes: >In article <2955@whuts.UUCP> 2212msr@whuts.UUCP (ROBIN) writes: >>Could someone in NETLAND please tell me how to define a type 15 drive on an >>early IBM AT? I've got a Seagate 4051, currently configured as a type 11, but >>that wastes about 4-5Mbytes. If someone could supply code to write to table > >I am using a Seagate 4051, but I have it configured as a type 17. The SETUP.COM Problem: IBM's only have 15 drive types built into ROM. To get full disk space out of the 4051, you need to: 1) upgrade your BIOS (I've used Award 3.01 -- support 47 or so hard drives in ROM!) 2) get a piece of software like Disk Manager (Ontrack Systems) or Speedstor (Storage Dimensions). Of the two, Disk Manager is superior, in my opinion. By the way, I've never actually *put* non-IBM ROMS into an AT. Does anyone know if this works? We sell clone AT's, and so I rarely, if ever, see a real IBM AT. Aloha, Jonathan Spangler UUCP: {ihnp4,vortex,dual}!islenet!jons OPUS/FIDONET: Sysop@(12/6) HTCS BBS (808)531-2659, 24 hrs., Honolulu -- Jonathan Spangler UUCP: {ihnp4,vortex,dual}!islenet!jons OPUS/FIDONET: Sysop@(12/6) HTCS BBS (808)531-2659, 24 hrs., Honolulu