westley@corsair.uucp (Terry J. Westley) (03/27/90)
In article <426@ai.etl.army.mil> richr@ai.etl.army.mil. (Richard Rosenthal) writes: > > Is there a use for the 256KB SIMM's removed from > an SE when upgraded with 1MB SIMM'S? > Is it possible (or reasonable) to build a RAM disk interfaced via SCSI? Seems that I've seen an awful lot of 256KB SIMMs for sale. Terry J. Westley Arvin/Calspan Advanced Technology Center P.O. Box 400, Buffalo, NY 14225 acsu.buffalo.edu!planck!hercules!westley
wwtaroli@rodan.acs.syr.edu (Bill Taroli) (03/27/90)
>In article <426@ai.etl.army.mil> richr@ai.etl.army.mil. (Richard Rosenthal) writes: > >Is it possible (or reasonable) to build a RAM disk interfaced via SCSI? >Seems that I've seen an awful lot of 256KB SIMMs for sale. I thought I remembered something like this mentioned in MacUser, so I looked it up. It appears a company has already done this, but at quite a cost. This is from the February 1990 issue of MacUser: The SiliconDisk PRO 24, from ATTO Technology, is a SCSI device that packs 24 megabytes of RAM and a Motorola 68020 chip into a box that acts like a hard-disk drive. Since the memory is all electronic, the I/O performance is incredibly fast -- but it's also incredibily expensive. ...SiliconDisk come in sizes from 24 megabytes to 128 megabytes, and you can order a custom unit of up to 512 megabytes. But all this power doesn't come cheap. This is the Maserati of storage devices, starting at $4,995 for the 8- megabyte unit and costing up to $52,595 for 128 megabytes. (ATTO could not quote a price on a 512-megabyte unit because it uses 4-megabyte RAM chips, which had unstable prices at press time.) SiliconDisk PRO 24 **** 1/2 List Price: $11,995 Manufactured by: ATTO Technology 1567 Sweet Home Road Amherst, NY 14221 (716) 688-4259 Compatability: Mac Plus or later. So, I would assume that it can be done. I don't know how good a 1Mb RAM disk would be... I certainly know if I were to use one, I'd rather not use 1Mb of my system RAM versus 1Mb of RAM that I really have no other use for. If anyone has information about getting an external unit using SIMMS for a RAM disk on the SCSI bus, I'd certainly be interested. Bill Taroli WWTAROLI@RODAN.acs.syr.edu -- ******************************************************************************* * Bill Taroli (WWTAROLI@RODAN.acs.syr.edu) | "You can and must understand * * Syracuse University, Syracuse NY | computers NOW!" -- Ted Nelson * *******************************************************************************