Raid1 resync

Raid1 resync

[Libor Klepáč]

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Hi,
before my ssd crashed, my /home partion was sitting on md raid1 consisting of 
partition on disk and iScsi LUN in network, it was created with bitmaps and 
iscsi lun was set writemostly.
So when i came to work, i fired up iscsi, added lun to raid and partial resync 
went ahead.
Before leaving work, i failed iscsci disk and kicked it from raid.
I would like to use something like this with btrfs, without mdraid below it.

Is it somehow posible?
1) I can't go below 2 devices.
2) Does btrfs support resync only of changed blocks like mdraid with bitmaps?

Thanks
Libor

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Re: Raid1 resync

[Wenyi Liu]

Hi Libor:
    Maybe, you can attach your oops at first.

---
Best Regards,
Liu Wenyi

2011/3/11 Libor Klep=C3=A1=C4=8D <libor.klepac@bcom.cz>
>
> Hi,
> before my ssd crashed, my /home partion was sitting on md raid1 consi=
sting of
> partition on disk and iScsi LUN in network, it was created with bitma=
ps and
> iscsi lun was set writemostly.
> So when i came to work, i fired up iscsi, added lun to raid and parti=
al resync
> went ahead.
> Before leaving work, i failed iscsci disk and kicked it from raid.
> I would like to use something like this with btrfs, without mdraid be=
low it.
>
> Is it somehow posible?
> 1) I can't go below 2 devices.
> 2) Does btrfs support resync only of changed blocks like mdraid with =
bitmaps?
>
> Thanks
> Libor
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Re: Raid1 resync

[Libor Klepáč]

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Hi,
sorry for my bad wording, i have no crash with btrfs, I'm considering to 
switch to btrfs on ssd disk comming back from warranty claim.
I was just asking, whether it's posible to switch my old setup (i described in 
my first mail) using mdraid to using btrfs internal raid without using mdraid, 
ie whether it's possible to resync changed data on iscsi disk when i come to 
work in morning.

With regards
Libor

PS. If this mailing list is for bug/patches reporting only, then i'm sorry for 
making unvanted mail traffic.


Dne pátek 11 Březen 2011 15:41:25 Wenyi Liu napsal(a):
> Hi Libor:
>     Maybe, you can attach your oops at first.
> 
> ---
> Best Regards,
> Liu Wenyi
> 
> 2011/3/11 Libor Klepáč <libor.klepac@bcom.cz>
> 
> > Hi,
> > before my ssd crashed, my /home partion was sitting on md raid1
> > consisting of partition on disk and iScsi LUN in network, it was created
> > with bitmaps and iscsi lun was set writemostly.
> > So when i came to work, i fired up iscsi, added lun to raid and partial
> > resync went ahead.
> > Before leaving work, i failed iscsci disk and kicked it from raid.
> > I would like to use something like this with btrfs, without mdraid below
> > it.
> > 
> > Is it somehow posible?
> > 1) I can't go below 2 devices.
> > 2) Does btrfs support resync only of changed blocks like mdraid with
> > bitmaps?
> > 
> > Thanks
> > Libor

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