egray@fthood (11/01/85)
I would like to hear from anyone who has upgraded a AT&T Unix PC 7300
(RAM or hard disk).
I am planning to buy one soon (for my home), and would like up upgrade it
myself.
Questions:
o Are the RAM chips in sockets?
o Jumpers required?
o PAL chips?
o Chip speed?
o What is the disk interface?
I hear rumor that the new Tandon AT clone has an option for a half height
40 meg drive with an average access time of 40ms.
o Has anyone seen a 1/2 height with 40ms access time?
Thanx
Emmet P. Gray
{pur-ee,ihnp4}!uiucuxc!fthood!egraycorey@fluke.UUCP (Corey Satten) (11/06/85)
> > I would like to hear from anyone who has upgraded a AT&T Unix PC 7300 > (RAM or hard disk). > > I hear rumor that the new Tandon AT clone has an option for a half height > 40 meg drive with an average access time of 40ms. > > o Has anyone seen a 1/2 height with 40ms access time? > > Thanx > > Emmet P. Gray > {pur-ee,ihnp4}!uiucuxc!fthood!egray I have been running with the Microtek (Tandon) 50 meg 1/2 height drive for about 1 week now. It is remarkably faster. My benchmarks indicate that the difference between real time and sys+user time is exactly half of what it was before (with the 80ms drive I guess). I notice about 20-30% overall speedup on a 1meg system. It's also somewhat quieter. I did the replacement myself. The hardest part was finding the screws to get the machine open (2 under the keyboard and 2 in the back - then pry forward on the plastic in the front to clear 2 molded catches). I do notice that the number of incidents reported in /usr/adm/unix.log has increased with the new disk, but I've had no hard errors (more than I can say for the Toolin 40 meg I had before.) The AT&T folks say that incidents in /usr/adm/unix.log are normal so I'm ignoring it. With these changes, I find the unix-pc about the same speed as a diskless SUN 50/2 running 4.2BSD. -- ******* Corey Satten; John Fluke Mfg. Co MS 223B; PO Box C9090 Everett WA 98206 {uw-beaver,decvax!microsoft,ucbvax!lbl-csam,allegra,tikal}!fluke!corey (206) 356-5058