Re: landisk / Plextor Panicing problem

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Hi,

Could you try attached patch for netbsd-5?

> I have several Plextor SH4 machines I used to use for NAT and pkgsrc
> building, but something's happened.
>
> One in particular was stable for more than a year with no problems
> whatsoever. I upgraded the OS to 5.1 in the end of December, 2010, and it
> became unstable. It was finally returned to me and I pulled the disk and put
> it in another Plextor which has a serial console to see what was up.
>
> I upgraded everything to netbsd-5 compiled from a few days ago, saw that
> there were UDMA errors, compiled a kernel to only use non-UDMA modes, but
> that made no difference. I ran and re-ran fsck on the filesystem a number of
> times, but after half a day of doing things I ran into a panic like this:
>
> free inode //28750646 had 4 blocks
> panic: buf mem pool index 23
> Begin traceback...
> calling through null pointer?
> End traceback...
>
> I'm certain it's not the hard drive (which is a 250 gig Hitachi which came
> with the Plextor) because another Plextor with a 16 gig CF card became
> unstable after a year when updating around the same time (December, 2010).
>
> The issue now is that I can run the system and do lots of I/O (cvs trees, et
> cetera), but after a while if I reboot and force an fsck, it always comes up
> with an unhappy filesystem which requires repair.
>
> This is sort of reminiscent of an issue with VAX machines with larger
> partitions - stable for years, then all of a sudden the filesystem would
> become corrupt after a few days.
>
> Does anyone have any clues as to what might have changed to cause this
> problem?

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