From: NeilBrown <neilb@suse.de>
To: Markus Hochholdinger <Markus@hochholdinger.net>
Cc: linux-raid@vger.kernel.org, Chris Webb <chris@arachsys.com>
Subject: Re: [PATCH 018 of 29] md: Support changing rdev size on running arrays.
Date: Mon, 26 Mar 2012 09:15:18 +1100 [thread overview]
Message-ID: <20120326091518.6d56d1c6@notabene.brown> (raw)
In-Reply-To: <201203242147.23273.Markus@hochholdinger.net>
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On Sat, 24 Mar 2012 21:47:15 +0100 Markus Hochholdinger
<Markus@hochholdinger.net> wrote:
> Hello,
>
> it's been a long time, but today I tried again and had success!
>
> Am 28.06.2008 um 01:41 Uhr schrieb Neil Brown <neilb@suse.de>:
> > On Friday June 27, Markus@hochholdinger.net wrote:
> > > Am Freitag, 27. Juni 2008 08:51 schrieb NeilBrown:
> > > > From: Chris Webb <chris@arachsys.com>
> [..]
> > You don't want to "mdadm --grow" until everything has been resized.
> > First lvresize one disk, then write '0' to the .../size file.
> > Then do the same for the other disk.
> > Then "mdadm --grow /dev/mdX --size max".
>
> it works for me, if I do:
> echo 0 > /sys/block/md2/md/rd0/size
> mdadm --grow /dev/md2 --size=max
> # till here, nothing happens
> echo 0 > /sys/block/md2/md/rd1/size
> mdadm --grow /dev/md2 --size=max
> # rebuild of the added space begins
>
> If I do only:
> echo 0 > /sys/block/md2/md/rd0/size
> echo 0 > /sys/block/md2/md/rd1/size
> mdadm --grow /dev/md2 --size=max
> nothing will change.
That is odd.. it certainly should.
And the current 'mdadm' will do the "echo 0 > size" for you so you just need
to "mdadm --grow --size=max" command.
>
> As I understand, with "echo 0" md sees the new size and only with --grow the
> superblock will be moved.
No, the superblock is moved with the "echo 0", but the space isn't used until
the "--grow".
>
> I'm doing this with 2.6.32-5-xen-686 within Debian (squeeze) 6.0.
>
> Many thanks to you and all the other linux-raid developers for this feature!
>
> I'm very happy about this :-)
Excellent!
Thanks,
NeilBrown
>
>
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next prev parent reply other threads:[~2012-03-25 22:15 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-27 6:49 [PATCH 000 of 29] md: Introduction : patchbomb for 2.6.27 merge window NeilBrown
2008-06-27 6:49 ` [PATCH 001 of 29] md: Ensure interrupted recovery completed properly (v1 metadata plus bitmap) NeilBrown
2008-07-01 7:20 ` Jan Engelhardt
2008-06-27 6:49 ` [PATCH 002 of 29] md: Don't acknowlege that stripe-expand is complete until it really is NeilBrown
2008-06-27 6:49 ` [PATCH 003 of 29] md: Fix error paths if md_probe fails NeilBrown
2008-06-27 6:49 ` [PATCH 004 of 29] md: linear: correct disk numbering error check NeilBrown
2008-06-27 6:49 ` [PATCH 005 of 29] md: use bio_endio instead of a call to bi_end_io NeilBrown
2008-06-27 6:49 ` [PATCH 006 of 29] md: Improve setting of "events_cleared" for write-intent bitmaps NeilBrown
2008-06-27 6:50 ` [PATCH 007 of 29] md: Allow setting start point for requested check/repair NeilBrown
2008-06-27 6:50 ` [PATCH 008 of 29] md: Close race in md_probe NeilBrown
2008-06-27 12:21 ` Andre Noll
2008-06-27 23:38 ` Neil Brown
2008-06-30 7:52 ` Andre Noll
2008-06-27 6:50 ` [PATCH 009 of 29] md: Don't try to make md arrays dirty if that is not meaningful NeilBrown
2008-06-27 6:50 ` [PATCH 010 of 29] md: Enable setting of 'offset' and 'size' of a hot-added spare NeilBrown
2008-06-27 6:50 ` [PATCH 011 of 29] md: Support adding a spare to a live md array with external metadata NeilBrown
2008-06-27 6:50 ` [PATCH 012 of 29] md: rationalise return value for ->hot_add_disk method NeilBrown
2008-06-27 6:50 ` [PATCH 013 of 29] md: Don't reject HOT_REMOVE_DISK request for an array that is not yet started NeilBrown
2008-06-27 6:50 ` [PATCH 014 of 29] md: Make sure all changes to md/array_state are notified NeilBrown
2008-06-27 6:50 ` [PATCH 015 of 29] md: Make sure all changes to md/sync_action " NeilBrown
2008-06-27 6:51 ` [PATCH 016 of 29] md: Make sure all changes to md/degraded " NeilBrown
2008-06-27 6:51 ` [PATCH 017 of 29] md: Make sure all changes to md/dev-XX/state " NeilBrown
2008-06-27 6:51 ` [PATCH 018 of 29] md: Support changing rdev size on running arrays NeilBrown
2008-06-27 16:09 ` Markus Hochholdinger
2008-06-27 23:41 ` Neil Brown
2010-03-30 14:52 ` Markus Hochholdinger
2010-03-31 5:41 ` Neil Brown
2010-04-01 15:23 ` Markus Hochholdinger
2012-03-24 20:47 ` Markus Hochholdinger
2012-03-25 22:15 ` NeilBrown [this message]
2021-11-10 13:09 ` Markus Hochholdinger
2021-11-10 17:51 ` Markus Hochholdinger
2021-11-11 13:10 ` Markus Hochholdinger
2021-11-11 15:09 ` Markus Hochholdinger
2021-11-12 1:22 ` Guoqing Jiang
2021-11-12 14:31 ` Markus Hochholdinger
2008-06-27 6:51 ` [PATCH 019 of 29] md: md: kill STRIPE_OP_MOD_DMA in raid5 offload NeilBrown
2008-06-27 6:51 ` [PATCH 020 of 29] md: md: kill STRIPE_OP_IO flag NeilBrown
2008-06-27 6:51 ` [PATCH 021 of 29] md: md: use stripe_head_state in ops_run_io() NeilBrown
2008-06-27 6:51 ` [PATCH 022 of 29] md: md: unify raid5/6 i/o submission NeilBrown
2008-06-27 6:51 ` [PATCH 023 of 29] md: md: replace STRIPE_OP_CHECK with 'check_states' NeilBrown
2008-06-27 6:51 ` [PATCH 024 of 29] md: md: replace STRIPE_OP_BIOFILL with STRIPE_BIOFILL_RUN NeilBrown
2008-06-27 6:52 ` [PATCH 025 of 29] md: md: replace STRIPE_OP_COMPUTE_BLK with STRIPE_COMPUTE_RUN NeilBrown
2008-06-27 6:52 ` [PATCH 026 of 29] md: md: replace STRIPE_OP_{BIODRAIN,PREXOR,POSTXOR} with 'reconstruct_states' NeilBrown
2008-06-27 6:52 ` [PATCH 027 of 29] md: md: replace R5_WantPrexor with R5_WantDrain, add 'prexor' reconstruct_states NeilBrown
2008-06-27 6:52 ` [PATCH 028 of 29] md: md: handle operation chaining in raid5_run_ops NeilBrown
2008-06-27 6:52 ` [PATCH 029 of 29] md: md: rationalize raid5 function names NeilBrown
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