********** Topic 14 Thu Aug 21, 1986 DEB [*deb!*] at 17:32 EDT Sub: CBM 9090 IEEE 7.5 Meg Hard Drives!!! ---------- Category 11, Topic 14 Message 1 Thu Aug 21, 1986 MIKEM [Pax Regal] at 19:24 PDT For those interested, here is a short description of the 9090 HD: The D9090 is a 5 1/4 single-drive, non-removable, 'Winchester' technology, storage device. It features three platters, with recording surfaces on both sides, and provide 7.5 million (meg) characters of storage. A single random access file may occupy the entire capacity of the unit. There is an IEEE interface connector in the back, and a slow-blow fuse near the lower edge of the rear panel. The drive has DOS 3.0 and the features include a dynamically expandable directory allowing for unlimited number of file entries, replacement-mapping of bad sectors, and a self-locating BAM. Short list of specs: Internal Transfer rate - 5 Mb IEEE-488 Bus Transfer Rate - 1.2 Kb Track to Track Access Time - 3 milli-secs Average Track Access time - 153 milli-secs Speed - 3600 RPM Height - 5.75 in. Width - 8.25 in. Depth - 15.25 in. Weight - 21 lbs. Hope this helps. -Mike- ---------- Category 11, Topic 14 Message 5 Fri Aug 22, 1986 M.GROVE at 18:43 EDT Just how compatable is this drive with the 128. Does it recognize all the commands that the 128's DOS uses? I have been working with a drive from JCT ( 5 meg ) for about 3 weeks now, and am pretty pleased with it. I have been working with the enginneer of the product, and we are getting the drive to almost 100% compatability. At date, I would say that the drive is about 95% compatable. I work at Tussey Computer Products, and we will be selling this product in the future. I have just ordered in a shipment of them which are much more compatable than the one I am currently using. It uses a Whinchester drive, *comes with a 5 year warranty*, their are models available from 3.7 meg to 10 meg, uses the serial port ( with another port for daisy-chaining prepherials ), and doesn't take up alot of desk space also. It can be mounted in a vertical position if needed. I do not know what price we will be selling them at yet, but I will post it here once we receive the product. Yes, their are some drives available for the 128/64, but incompatability is a BIG problem. Soon, I hope to have the option to boot directly off this drive. Any more questions, leave them here. I'll be happy to get back to you. Marty Grove TCP Sales ---------- Category 11, Topic 14 Message 6 Fri Aug 22, 1986 DEB [*deb!*] at 19:00 EDT This drive is a COMMODORE drive, using DOS 3.0....its completely compatible with Commodore DOS, because it IS a Commodore DOS. You will need to obtain an IEEE interface to use it, tho, because its an IEEE drive, like the SFD 1001, 4040,2031,8050 and 8250 drives. While I worked at Commodore, I was lucky enough to have one on my desk, and I used it all the time. The one big problem with it, usage wise, is that it uses standard old Commodore DOS, there are no subdirectories. ALSO...programming the sucker is a pain, cuz the BAM Dynamically relocates itself as required!! The drive has no limit on the number of files in the directory, tho. ---------- Category 11, Topic 14 Message 21 Wed Sep 03, 1986 GRAFIX.M [Mike Hooper] at 13:23 EDT As long as the SFD's and 1541's take to format, I'm sure it takes forever to format one of those gems! --GFX ---------- Category 11, Topic 14 Message 22 Wed Sep 03, 1986 DEB [*deb!*] at 17:57 EDT It takes a little under *2* HOURS to format one, Mike.... ----------