keithr@vice.ICO.TEK.COM (U.D.M.) (12/01/88)
My brother's old style 520 has just started acting up. When writing to a disk or creating a new folder the disk directory sector gets messed up, I think. After one of these operations the directory looks like garbage. Some of the "new" file names have resembalances(?) to words, characters from the ascii files on the disk. I know its not the disk drives, because I checked them out on my 1040. Could it be a loose disk controller chip? I've heard of such things but was wondering if anyone had any suggestions. Also when trying to do a disk copy from one disk to the other, the writing disk is not recognized, but the reading drive is. Any help is greatly appreciated. Keith Rast keithr@icogem1.ICO.TEK.COM
steve@pnet51.cts.com (Steve Yelvington) (12/03/88)
keithr@vice.ICO.TEK.COM (U.D.M.) writes: >My brother's old style 520 has just started acting up. When writing >to a disk or creating a new folder the disk directory sector gets >messed up, I think. After one of these operations the directory >looks like garbage. Some of the "new" file names have >resembalances(?) to words, characters from the ascii files on the >disk. I know its not the disk drives, because I checked them out on >my 1040. Could it be a loose disk controller chip? I've heard of >such things but was wondering if anyone had any suggestions. Also >when trying to do a disk copy from one disk to the other, the >writing disk is not recognized, but the reading drive is. > >Any help is greatly appreciated. > >Keith Rast >keithr@icogem1.ICO.TEK.COM This is basically the behavior I got from my 520ST (mid-1985 serial number) starting about six months ago. One of the conditions that can contribute to it is using disks formatted with nonstandard programs (extended formats, for example). Some of the freeware disk formatters I've used appear to write identical serial numbers in the boot sector, and TOS looks at serial numbers as a way of determining whether the disk has been changed. (I have heard that there is a bug in the TOS function that creates the prototype boot sector, and that the parameter that tells it to generate a random number doesn't work properly. My things-to-do list includes writing a program to examine the boot sector and verify whether that's happening.) The bad news is this: After several months of intermittent flakiness, including the aforementioned garbage directories, my drive controller died. I had to ship the ST back to Sunnyvale for replacement. (Please hurry, Atari; I'm suffering....) The good news is that if your brother's ST dies, Atari's replacement policy (assuming I get the replacement) is quite generous. The swap of my system unit will cost less than Apple charges for a new Macintosh mouse. UUCP: {rosevax, crash}!orbit!pnet51!steve ARPA: crash!orbit!pnet51!steve@nosc.mil INET: steve@pnet51.cts.com ----------- -or- stag!thelake!steve@pwcs.StPaul.GOV "A member of STdNET -- the ST Developers' Network"
ignac@electro.UUCP (Ignac Kolenko) (12/05/88)
this is exactly the same problem my little brother's old 520 was having. i was almost ready to buy a new disk controller chip, (until i saw the price they were charging at Orion Electronics here in town!!!), so i just reseated all of the chips, and presto, no more problems!!!!! -- Ignac A. Kolenko "Squeeze my lemon, let the juice run watmath!watcgl!electro!ignac down my leg!" - Led Zep (Lemon Song) "The main energizer's bypassed like a Christmas tree, so don't give me too many bumps!" - Scotty (ST:TWOK)