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-
- December 2, 1987
- Laguna Hills BBS
- Hard Drive Conference
- (714) 643-1100 (voice)
- (714) 643-3066 (BBS)
-
-
- The Laguna Hills BBS has now begun selling an advanced RLL Hard Disk
- Controller made by a company caller Perstor Data Systems, Inc. This
- Controller is being offered at a substantial savings over the suggested
- list price, along with telephone support, and our usual 24 hour a
- day support through the new Hard Drive Conference #4 on this BBS. Below
- is a description of the controllers, along with a list of drives that
- have been certified by the manufacturer and other Sysop USERS that have
- used these controllers for the better part of 1987. Lastly, is a list of
- drives that are known not to work with the controller. *
-
-
- Perstor Data Systems, Inc., currently offers one line of
- controllers... the Perstor 200 Series. In this line of controllers
- there are two models, the PS180 and PS200. Both models utilize the
- Advanced Run Length Limited 2,7 encoding method.
-
- The Perstor PS180 Controller has a data transfer rate of 9 megabits
- per second to increase hard disk capacity by at least 90% and provides
- a format of 31 sectors per track. The PS200 Controller has a data
- transfer rate of 10 megabits per second to increase hard disk capacity
- by at least 100% and provides 34 sectors per track. Both controllers
- are ROM residence selectable and port address switchable to allow you
- to have more than one BIOS ROM controller. In addition, the PS180 and
- PS200 are multi-layer controllers, reducing electronic noise in the
- circuitry.
-
- The Perstor 200 Series Controllers will work with virtually any high
- quality Winchester disk drive compatible with the IEEE specifications
- for the ST506/412 interface. Perstor has conducted successful
- qualification tests on most of the popular fixed disk drives in the
- market today, including Miniscribe, Seagate, Maxstor, Newbury Data,
- CDC, LaPine, Rodime, and other models (listed at the end of this
- article).
-
- The PS180 Controller works with MFM and RLL approved drives, plated
- and oxide media, and the PS200 Controller works best with RLL approved
- plated media drives, whether installed in a PC, XT, or AT or any of
- their compatibles. Both controllers use a IBM compatible BIOS, so
- they are compatible with MSDOS, PCDOS, UNIX, XENIX, and CPM, as well
- as Novell Netware.
-
- Both the PS180 and PS200 Controller are capable of supporting drives
- with 15 heads or less and 2048 cylinders or less. They come with an
- Advanced Error Checking and Correction capability using a 56 bit code
- to allow twice the bit dropout factor of normal controllers. In
- addition to this 56 bit ECC, both models have a 25 megabit data
- recovery circuit, and on both controllers is a sector buffering RAM
- chip to overcome speed differences between the drive and the
- controller.
-
- On both models, you have your choice of mounting hard disk drives
- internally or externally, and using the controller as a primary, co-
- resident, or multiple controller. Plus, you have the option of setting
- up the controller for BIOS or non-BIOS use, and can have either Direct
- Memory Access or programmed input/output.
-
- DiskExpander, a compaction software program packaged with the Perstor
- Controllers as a no-cost option, provides another 50% increase in
- capacity above the doubling provided by the controller. DiskExpander
- is enhanced by a cache access method that lowers the average access
- time to about 15ms when used. However, this compaction software
- program needs a DOS 3.1 or higher environment.
-
-
- Approved Drive List
-
- The following drives have been successfully tested by the manufacturer
- and current users with the Perstor 200 series controllers.
-
- Miniscribe Seagate Maxstor Tandon Rodime Newbury CDC Wren 2
-
- MS3212 ST225 XT1065 TM362 3055 NDR320 94155-19
- MS3425 ST225-003B XT1085 352 NDR340 36
- MS3650 ST238 XT1105 NDR1065 38
- MS6032 ST251 XT1140 NDR1085 48
- MS6053 ST277 XT2085 1105 51
- MS6074 ST412 XT2150 1140 57
- MS6085 ST4026 XT2190 2190 67
- MS8425 ST4038 77
- MS8438 ST4051 86
- MS8438F ST4096
- NEW 40
-
-
- Microscience Fujitsu Lapine
-
- HH-325 M2241AS TITAN 20
- HH-725 M2242AS TITAN 30
- HH-1050 M2243AS
-
-
-
- Comments by some of the experienced Sysop Users of the PS180 and PS200:
-
- 1) Richard Driggers of the Sparta PCBoard has been operating the
- Seagate 4096 and Maxstor XT1085 drives are being used 24 hours a day.
- MACE and Norton's DT have been run on the drives every single day for
- the past 5 months and neither have picked up a single soft sector or
- hard sector error that was not picked up initially by Disk Manager or
- Vfeature.
-
- 2) Chuck Ammann is running a Maxstor XT2140 that is currently
- formatted on a PS200 10mbits per second controller and he was able to
- get 196MB on on 1024 cylinders out of a possible 1224 cylinders.
-
- 3) Other Sysops running the Perstor Controller
- Paul Kopit - Software Society
- Neil Leder - Doctor's Office BBS
- Paul Waldinger - Sound of Music BBS
- Gary Thurlow - Wilmington Delaware BBS
- Lee Windsor - Hounds Haven BBS
- Eric Green - ELCO Base BBS
- Miles Lester - Xignals PCBoard - Auburn Alabama
-
- 4) The controllers are installed in a mixed bag of machines such as
- 12mhz AT Clone, Olivetti M28, AST Research Premium 286, Multitech
- Accel 900, IBM PC-XT and a stock IBM AT machine.
-
- 5) Problems reported so far..
- 1.. Does not work real great with SpeedStor prior to 4.02 since
- Speedstor up to this version would not support 34 sectors per
- track needed by the PS200. If you do use the PS200, you cannot
- use an even interleave such as 2, 4, 6, or 17, though the
- controller supports interleave all the way up to 30.
-
- 2.. Appears to hangs for unexplainable reason during a low level
- format using Vfeature Deluxe. Though you can then start the
- process over and usually will go completely through the second
- time.
-
- 3.. Will not work with some early versions Seagate ST4038.
-
- 4.. Will not work at all with a CMI Drive.
-
- 5.. Will not work with older Priam Drives. Though seems to work AOK
- with current production run of the Priam. Priam does a test to
- track 0 after receiving a positive indication that it has done
- a seek to track 0. Current software does not support the extra
- test. Will do so in the future.
-
- 6.. Limited size BIOS Tables. Though there are only four drive type
- types in the current BIOS, with the next production run, the
- BIOS will support 16 drive types in each table and the two
- drives on a card can be of two different types.
-
-
- What is the ideal interleave to use? That is a tough question to
- answer and depends a lot on your mix of drive, speed of machine, speed
- of RAM, etc. Gibson software may be the answer!
-
- How does this controller co-exist with the floppy/hd controller in an
- AT? Good question. It is simply a matter of running your setup program
- and telling the setup that you do not have any HD installed. Plug the
- Perstor in, hook up the hard drive and let er rip.
-
- Perstor plans in the near future to have a combination floppy/HD
- controller that will give the same blazing fast performance as their
- current 8 bit line of controllers. Should you wait til then? That is a
- decision only you can make. Are you running out of room? Need some
- cheap additional storage in a hurry at a very reasonable price. The
- Perstor Series 200 Series is the way to do it.
-
- What 32MB barrier software has been tested on it. Speed Stor, Vfeature,
- and Disk Manager all have been used ; yet, Vfeature seems to be the
- favorite. Disk Manager version 3.01 works superbly with the disk
- controller as well!
-
-
- Pricing!
-
- Suggested List My Price
-
- Perstor 180 - 9 Mbits Per second $395.00 $295.00
-
- Perstor 200 - 10 Mbits Per second $495.00 $395.00
-
- Telephone Support (individual) $50.00/Hour $Free
-
- Bulletin Board Support $Free $Free
-
-
- Add $10.00 to the above Controller price for handling and shipping
- (via surface UPS) charges.
-
- Method of payment?
-
-
- To order this Controller, send a Cashier's Check, Money Order or
- Personal Check payable to Strategic Resources and send it to ........
-
- ___________________
-
- Strategic Resources
- Suite 314
- 25381-G Alicia Pkway
- Laguna Hills, CA 92653
- ___________________
-
- Please allow two weeks for delivery plus an added 10 days to allow for
- all personal checks to be cleared by the bank.
-
-
- **** I M P O R T A N T ****
-
- ORDERING INSTRUCTIONS
-
- When ordering, specify the following:
-
- 1) Provide your full name, address and phone number(s)
-
- 2) Controller Model Number, ie, PS180 and/or PS200 and the
- quantity req'd. If more than one (1) controller is to
- be ordered, call (714) 643-1100 for total shipping charges.
-
- 3) The make and type of computer to be used with the controller
- plus the make and model number of your hard disk drive(s).
-
-
- _____________________
-
- Acknowledgement is made to Richard Driggers, Sysop of Sparta PCBoard,
- whose periodic series reports on the Perstor Controller were extracted
- and used for most of the text information provided herein.
-