DragonFly kernel List (threaded) for 2010-04
Re: I/O errors on Hammer volume
On Tue, Apr 13, 2010 at 11:44:36AM -0700, Matthew Dillon wrote:
> :I've just found this in the daily security output of my workstation
> :(running 2.6.1) :
> :Checking setuid files and devices:
> :find: /usr/pkgsrc/sysutils/sysinfo/CVS/Entries: Input/output error
> :find: /usr/pkgsrc/devel/avltree/CVS/Entries: Input/output error
> :find: /usr/pkgsrc/security/p5-Crypt-RSA/CVS/Entries: Input/output error
> :find: /usr/pkgsrc/ham/dpbox/CVS/Entries.Log: Input/output error
> :find: /usr/pkg/openoffice.org: Input/output error
> :find: /usr/pkg/openoffice.org3: Input/output error
> :These directories can no longer be used:
> :# cd /usr/pkg
> :# ls -ld o*
> :ls: openoffice.org: Input/output error
> :ls: openoffice.org3: Input/output error
> :I'm not sure if this is due to a bug in HAMMER or to some sort of hardware
> :failure. The hard disk is a 500GB Western Digital Green model with a single
> :hammer version 4 volume. The directories belong to the root fs.
> :Filesystem Size Used Avail Capacity Mounted on
> :PFS500GP 460G 400G 60G 87% /
> One thing you can do is see if the disk is completely readable
> by using dd to read the raw drive. It should be able to read the
> whole disk until it hits the end of the disk:
> dd if=/dev/blahblah of=/dev/null bs=32k
It took almost 2 hours to run but found no errors.
There was only a few "Debug: pmap_interlock 00010003" lines in dmesg output.
> But beyond that, think back about things you might have done
> in the past that is outside the norm for HAMMER operations
> that might have caused the problem, such as add or remove
> a volume or adjust the disklabel or something like that.
Nothing so extreme.
I have updated the system to the latest 2.6 a few days ago. I think the
previous version didn't have the new REDO code.
I also briefly ran a DragonFly-2.6/x86-64 test installation from another disk
and used the existing 500GB drive /home PFS. The error messages appeared the