Re: 5.4-RELEASE-p4: shutdown hangs after rebuiding gmirror

2005-07-19 Thread Michiel Boland 

[recap: machine hangs on shutdown - see original message for more details]

Syncing disks, vnodes remaining...1 1 0 1 1 0 0 0 done
No buffers busy after final sync
Uptime: 55m39s
GEOM_MIRROR: Device raid1: provider mirror/raid1 destroyed.
GEOM_MIRROR: Device raid1 destroyed.


FWIW the hangs occur regardless of whether I rebuild a mirror. The problem 
is that the box sometimes hangs and sometimes not. Of course this makes 
the whole gmirror totally useless (as opposed to a bit of a nuisance)


It appears that the hang occurs somewhere between destruction of raid1 and 
'raid1.sync'. (whatever that is)


Does anyone have any clue as to what is going on or how I can debug this 
further? Please don't make me put solaris on this box. :)


Cheers
Michiel
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5.4-RELEASE-p4: shutdown hangs after rebuiding gmirror

2005-07-11 Thread Michiel Boland 
Hi. I am running FreeBSD 5.4-RELEASE-p4 on a sun V20Z. It has two seagate 
ST373307LC disks. The disks are mirrored with gmirror:


NameStatus  Components
mirror/raid1  COMPLETE  da0
da1

I unplugged one of the disks, then rebooted to see if it would boot from 
just the one disk. Of course there was no problem there.


I then inserted the other disk back in, followed by

 camcontrol rescan all
 gmirror forget raid1
 gmirror insert raid1 da1

After a while the mirror was OK again. I then rebooted for a second time. 
But the machine would not come up. The last lines printed on the console 
were


Syncing disks, vnodes remaining...1 1 0 1 1 0 0 0 done
No buffers busy after final sync
Uptime: 55m39s
GEOM_MIRROR: Device raid1: provider mirror/raid1 destroyed.
GEOM_MIRROR: Device raid1 destroyed.

So it was stuck somewhere in the shutdown sequence between the gmirror 
destruction and the Shutting down ACPI bit. Sending a break to the 
console did not produce a DDB prompt, whereas during normal operation it 
would.


I had to power-cycle to get the boot to work again.

If I leave the disks alone, rebooting does not hang the machine.

This is a bit of a nuisance. Who has any idea where to look to 
troubleshoot this?


Cheers
Michiel
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