hmm, that's interesting, maybe a possiblity. I incorrectly stated the
termination on my configuration.
Chain 1 is terminated by the tape drive.
motherboard--->9G DRIVE--->CD-ROM--->TAPE DRIVE
I also have termin. power enabled on the tape drive. I'm not sure if term.
power is enabled on the other drives. I'm kinda fuzzy on how that works.
If I have more that 1 device set to term. power enable will that mess
things up? Which device is preferrable to enable term. power on, if any?
Thanx,
-Tony
On Thu, 24 Feb 2000, Ralf Baechle wrote:
> On Wed, Feb 23, 2000 at 10:10:47AM -0500, Admin Mailing Lists wrote:
>
> > while we're on medium sense errors, I also have a problem.
> >
> > Chain 1. AIC7880 onboard (term.), 9G SCSI, Sony SDT-9000, Toshiba CD-ROM
> > (term.)
> > Chain 2. Adaptec Ultra2 controller, 18G SCSI
> > linux, libc 5.4.38, kernel 2.2.10 SMP, bru 15.0
> >
> > A week ago I had my 18G drive go bad, grinding like anything, got it
> > copied over to a new drive before the SCSI errors started.
> > The DAY after I replaced it, the 9G drive does the same thing, got almost
> > all of that copied over before the errors started.
> > A few days after that, my tape drive is being odd..some days backing up
> > fine, some days not at all, some days just a few gigs. The tape drive is
> > about 2 years old..been thouroughly cleaned once.
> >
> > I see this from "dmesg"
> > st0: Error with sense data: Current error st09:00: sense key Hardware
> > Error
> > Additional sense indicates Internal target failure
> > st0: Error with sense data: Current error st09:00: sense key Medium Error
> > Additional sense indicates Internal target failure
> > st0: Error on write filemark.
> > st0: Error with sense data: Current error st09:00: sense key Medium Error
> > Additional sense indicates Internal target failure
>
> A few years ago I we had repeated disk failures in one disk subsystem.
> After replacing the disk for the second time within one or two months
> we examined the power supply with a voltmeter which showed that 5V / 12V
> were OK. After the third disk shotly after we again meassured the
> voltage supplied, this time using a 500MHz digital scope. This time
> we saw that the 5V did change betwen ~ 2.5V and close to 8V at times.
> After replacing the powersupply the disk which previously indicated
> media errors was working perfectly well again for the next few years.
>
> Ralf
>
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