Flappy hotswap disks?

Flappy hotswap disks?

[Molle Bestefich]

If
- a disk is part of a MD RAID 1 array, and
- the disk is 'flapping', eg. going online and offline repeatedly in a
hotswap system, and
- a *write* occurs to the MD array at a time when the disk happens to
be offline,

will MD handle this correctly?

Eg. will it increase the event counters on the other disks /even/ when
no reboot or stop-start has been performed, so that when the flappy
disk flaps back online, it will be (perhaps partially) resynced?

Apologies if it's a dumb question.
Hope someone's got a minute to answer it :-).

Re: Flappy hotswap disks?

[Mario 'BitKoenig' Holbe]

Molle Bestefich <molle.bestefich@gmail.com> wrote:
> Eg. will it increase the event counters on the other disks /even/ when
> no reboot or stop-start has been performed, so that when the flappy

Event counters are increased immediately when an event occurs.
A device failure is an event as well as start and stop of a RAID are.


regards
   Mario
-- 
Programmieren in C++ haelt die grauen Zellen am Leben. Es schaerft
alle fuenf Sinne: den Schwachsinn, den Bloedsinn, den Wahnsinn, den
Unsinn und den Stumpfsinn.
                                 [Holger Veit in doc]

Re: Flappy hotswap disks?

[Molle Bestefich]

Mario 'BitKoenig' Holbe wrote:
> Molle Bestefich wrote:
> > Eg. will it increase the event counters on the other disks /even/ when
> > no reboot or stop-start has been performed, so that when the flappy
>
> Event counters are increased immediately when an event occurs.
> A device failure is an event as well as start and stop of a RAID are.

Ok.  Thanks!
Hope it's race-free and all :-).