daf@cs.brown.edu (David Fedor) (11/29/89)
Well, I guess I am another victim of the Quantum drive failures. I've heard some horror stories about the PROMs that they put in, though... things like that it slows down the drive significantly, and makes a lot of noise, and fools with the drive at strange times... Are these accurate? If you've had this PROM put in, please let me know if it was a good idea. Thanks! -Dave
espen@well.UUCP (Peter Espen) (12/02/89)
In article <21732@brunix.UUCP>, daf@cs.brown.edu (David Fedor) writes: > Well, I guess I am another victim of the Quantum drive failures. > I've heard some horror stories about the PROMs that they put > in, though... things like that it slows down the drive significantly, > and makes a lot of noise, and fools with the drive at strange times... > > Are these accurate? If you've had this PROM put in, please let me > know if it was a good idea. If your Quantum drive has failed, your only choice is to get the new ROM "fix" installed. I had the new ROM put on my Quantum 80 meg 2 months ago when it failed. My drive is still doing random exercise routines that are lengthy and noisy. These exercises severely degrade the performance of the drive also. I've gotten a few replies from Apple reps on the net, telling me that a seek/scan test program should be run on the drive when the new ROM is installed. I've been told two different reasons for why this is supposed to keep the drive from doing it's random exercises. I've also been told that the drive should stop doing these routines after "a few weeks" whether the test program is run or not. It's been two months and mine is still going at it at random times. I'm still trying to get to the bottom of this situation. I would like to hear form anyone who's drive has stopped doing it's exercises after a few weeks! GOOD LUCK!! Here is a graph that illustrates the performance difference during the exercise routines. View the following graph using Monaco 9 point...... 20000 |####### | # # = NORMAL PERFORMANCE 18000 | # * = DEGRADED PERFORMANCE | # 16000 | # VERTICAL SCALE = KBITS/SEC | # 14000 | # HORIZ. SCALE = TRANSFER SIZE (K) | # 12000 | # | # 10000 | # | # 8000 | ############################## | 6000 | | 4000 | | 2000 | ****************************************** |*** |____________________________________________________ 10 15 20 25 30 35 40 45 50 55 60 This graph was generated using "SCSI evaluator 1.01" Peter Espen espen@well