Messages in this thread | | | Date | Thu, 16 Feb 2006 01:02:18 +0300 | From | Michael Tokarev <> | Subject | Re: readahead logic and I/O errors |
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linux-os (Dick Johnson) wrote: > On Wed, 15 Feb 2006, Michael Tokarev wrote: > > >>The thing is: I just fired a cdrom drive in my PC. >>It was a good device, and now it's dead. >>And the reason is the readahead logic, plus an unreadable >>(damaged, scratched) CD-rom. [] > Aside from the obvious read-ahead bug you discovered, have you > tried your CD drive after the reboot? It is not possible to > kill those things with software, even if attempting to write > with too much infrared LED drive. There is nothing except for > the removable disc to get hurt. Even the "head" isn't in contact. > It's just some infrared light, focused with a voice-coil, that > moves on a fixed platform.
I opened the drive after BIOS didn't detect it on reboot (after power-off). There's one fired (burned? perished? how's that in english?) chip on the plate, wich smells like fired silicone. It looks like a ~5mm pit in the center of square chip, full of ache, and there's a crack across it. The drive is dead.
I think it's a chip which controls one of the motors of the drive, most probably the one which moves the head, because the head motor connector is right near the chip.
When I turned off power, the drive was *hot*, and it started "trembling" (or chattering) when I turned power off.
It was a dvd-cd combo (read dvd, read-write cd) Teac drive, I don't remember the model (there's no label on the drive, and I can't send inquiry/identify command to it anymore, obviously).
Yest it looks like a problem in the drive *too*, as it should not behave like that in the first place. But the thing is, I did know something's bad going on, I saw it, but I wasn't able to stop it from linux, only poweroff stopped things from going.
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