Re: Warnings on shutdown (Debian Etch and Kernel 2.6.22.9)

[Jim Paris <jim@jtan.com>]

Renato S. Yamane wrote:
> Tejun Heo wrote:
> >Renato S. Yamane wrote:
> >>Jim Paris wrote:
> >>>For Debian, I don't think there are any complete solutions yet.
> >>>The related bug is   
> >>>http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=426224
> >>
> >>I think that we can fix this if someone can answer this:
> >>
> >>$ man halt
> >>"-h flag: This is important for IDE drives, since the kernel doesn’t 
> >>flush the write cache itself before power-off.."
> >>
> >>How can I know if kernel write cache itself? :-)
> >
> >Kernel has been flushing write cache for many many years now.  Man page 
> >needs update.  Also, flushing cache from halt is okay.  What's hurting 
> >is spinning down the drive from halt.
> 
> So, I think that halt script need know:
> 
> - How many and who is IDE drives and SCSI/SATA drives.
> - Devices with manage_start_stop as "0" or without manage_start_stop 
> need "halt -h".
> - Devices with manage_start_stop as "1" need only "halt".
> 
> This is correct?

The real changes need to be made in the shutdown utility,
as described here:
  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=426224#10

-jim