Re: [gentoo-user] power button to shutdown for openrc? [SOLVED]

[n952162]

I'm not seeing how doing an fsck from a live cd helps.


On 11/17/19 11:50, Mick wrote:
> On Sunday, 17 November 2019 10:30:49 GMT Neil Bothwick wrote:
>> On Sun, 17 Nov 2019 11:21:18 +0100, n952162 wrote:
>>> (in fact, that's exactly the situation that I've been confronted with
>>> and have turned to this mailing list to help me with: X locked up, my
>>> power-button was unresponsive so I had to force it down (holding the
>>> power key down for 30 seconds), and on reboot TWO filesystems had to be
>>> rebuilt by fsck, with substantial loss of organization and of data
>>> (despite both being ext3/4 journaling filesystems - I just don't
>>> understand that!) )
> As has been mentioned before holding the power button down until the system
> powers off is equal to a hard shutdown.  No write caches are flushed, no data
> is synced to disk and any writes could be left in mid air resulting in a
> messed up fs.  I always boot with a LiveUSB/CD and perform a fsck without
> mounting any drives, before I will try to boot the system normally again.
>
> If you lose power while the system is idle and no write operations are in
> process/waiting, then you may well have no loss of data as a result.
>
>
>> Please don't top-post on this list.
>>
>> Magic SysReq would probably have helped in those situations. ext3/4 only
>> journal metadata by default, you can specify a mount option to also
>> journal data but it impacts performance.
> When X hangs and I lose the keyboard to the extent where neither Ctrl+Alt+F1,
> or Ctrl+Alt+Del would work, I will use ssh to connect remotely and stop the
> hanging process or restat the X server.  If ssh is also not working, I use the
> magic SysReq sequence to stop processes, sync the disks and reboot, or
> shutdown.  I don't recall losing data in such cases, although when I have time
> I run fsck with Live media just in case.