Panic when connecting USB drive to amd64

Dag-Erling Smørgrav des at
Sun Feb 10 23:43:51 UTC 2008

Vladimir Botka <vlado at> writes:
> error message says:
> Fatal trap 12: page fault while in kernel mode
> fault code		= supervisor read data, page not present
> My guess is that the process cannot access memory (because there is
> none left). As I know ZFS is greedy, so unless you have 16 processor Sun
> Enterprise with 64GB memory you should better to switch back to UFS.

Your "guess" is incorrect, and I get the impression that you wrote this
just out of spite.

Yes, ZFS can run an improperly tuned system out of memory, but the panic
message in that situation is completely different from the one reported

Dag-Erling Smørgrav - des at

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