Re: [issue1504] hammer crash on cleanups

[Dennis Melentyev <dennis.melentyev@xxxxxxxxx>]

2009/9/17 Matthew Dillon <dillon@apollo.backplane.com>:
> :Hi!
> :
> :I had something very similar on 95% full hammer FS with version of FS =3D 1=
> :.
> :After upgrading it to v2 panics vent away.
> :
> :...
> :Also here are some interesting lines in /var/log/messages, possibly
> :indicating corrupted media:
> :
> :Sep 16 01:22:42 dfly kernel: ad4: WARNING - WRITE_DMA UDMA ICRC error
> :(retrying request) LBA=3D92046464
> :Sep 16 01:26:18 dfly syslogd: kernel boot file is /boot/kernel
> :Sep 16 01:26:18 dfly kernel: ad4: FAILURE - device detached
> :Sep 16 01:26:18 dfly kernel: subdisk4: detached
> :Sep 16 01:26:18 dfly kernel: HAMMER(Share_Big): Critical error
> :...
> :--=20
> :Dennis Melentyev
>
>    Gotta be two different things.  Basically ad4 had a DMA error and
>    detached and the HAMMER filesystem, being unable to write, threw a fit.
>    That would be an issue with NATA.  HAMMER was just saving itself.
>
>    That sort of UDMA failure is usually indicative of an IDE wiring
>    issue.
>
>    We did fix a bug in HAMMER related to very rare incorrect B-Tree
>    deletions which would lead to lost inodes and potentially panics.
>    Anything like that should no longer occur.
>
>                                        -Matt
>                                        Matthew Dillon
>                                        <dillon@backplane.com>
>

Wiring was the one possibility, and underpowered drive could be just
another (P4/2.4 with 3 HDD's on noname 300W PSU). Just realized that
few days ago: mbmon's 12P had showed 10.5+ Volts until PSU was
replaced with 400W one.

PS. That also saves my ears in the night, thanks to 120mm cooler :)

-- 
Dennis Melentyev