CAM status: Command timeout

[andrei at fazik.net.ua]

22 сентября 2017 г., 02:35, "Keith Hellman" <khellman at mcprogramming.com> написал:

> On Wed, Sep 20, 2017 at 11:06:11PM +0000, freebsd-stable List wrote:
> 
>> Sometimes it even can boot, but in few minutes will hang with same errors.
>> 
>> Hardware: Supermicro X8DTN+-F / 6xWD1502FYPS-02W3B0 /2xE5649
>> HDDs connected to sata ports on baseboard.
>> If I add
>> hint.ata.2.mode=PIO4
>> hint.ata.3.mode=PIO4
>> hint.ata.4.mode=PIO4
>> hint.ata.5.mode=PIO4
>> to device.hints I'm able to boot but performance of IO becomes really disappointing.
>> Also, if I add something like "find / -name something" to zfs rc script, than boots fine.
> 
> Boots fine but hangs in a few minutes? Or all is good to go? Here is a
> thught: it could be the find / ... command is causing enough delay to
> let some hardware "settle down" and behave more reasonably. Can you
> replace the find cmd with an equivalent sleep(1) command of like
> duration and get the same results?
> 
>> If I roll back system to 11.0 all works fine again.
> 
> Seemingly minor deltas in the system could have had the needed delay
> as an implicit part of the system...
> 
> Just my 2c
Nope, it can't boot fine at all, or init will get segfault or ttys or just system becomes unresponsive and I can't even login, so this heppens during start of services. I've also tried to disable all "non-base" services, but without success. 
As for trying just sleep - it doesn't helps. Seems that find helps because of caching by system triggered by find.



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