2.4.7-ac7 ext3: Can I remount and change mount option ?

2.4.7-ac7 ext3: Can I remount and change mount option ?

[Steve Kieu]

Hi,

I still can not remount my ext3 root partition to
change to the data=writeback mode using 2.4.7-ac7 .
And any other partition too.

>From alan post...

Don't refuse unneccessarily on remount with     (Petr
Vandrovec)
                              data= option with ext3

it means that I can do a remount an already mounted
ext3 FS and change the data mode?

Regards,


=====
S.KIEU

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Re: 2.4.7-ac7 ext3: Can I remount and change mount option ?

[Andrew Morton]

Steve Kieu wrote:
> 
> Hi,
> 
> I still can not remount my ext3 root partition to
> change to the data=writeback mode using 2.4.7-ac7 .
> And any other partition too.

This is not possible - you must unmount to change the
data journalling mode.

> >From alan post...
> 
> Don't refuse unneccessarily on remount with     (Petr
> Vandrovec)
>                               data= option with ext3
> 
> it means that I can do a remount an already mounted
> ext3 FS and change the data mode?

No, this refers to a problem where
	mount foo -o data=journal
would succeed, but then
	mount foo -o remount,data=journal
would fail.  We now allow remount to specify the journalling
mode, but it must be the same as the current mode - this change
is just to allow us to work more nicely with the mount tools.

-

Re: 2.4.7-ac7 ext3: Can I remount and change mount option ?

[Petr Vandrovec]

On  6 Aug 01 at 12:07, Andrew Morton wrote:
> Steve Kieu wrote:
> > 
> > Hi,
> > 
> > I still can not remount my ext3 root partition to
> > change to the data=writeback mode using 2.4.7-ac7 .

Steve, you are probably looking for 'rootflags=data=writeback'
kernel commandline option. Just add this into your lilo.conf.
In /etc/fstab either do not specify 'data=writeback' at all for
root partition, or you must use 'data=writeback' (I prefer
specifying data=xxx, as then / and other partitions look same
in fstab).
                                Best regards,
                                    Petr Vandrovec
                                    vandrove@vc.cvut.cz