W dniu 15.05.2012 02:14, NeilBrown pisze:
> On Mon, 14 May 2012 15:49:53 +0200 Sergiusz Brzeziński
> <Sergiusz.Brzezinski@xxxxxxxxxxxxxx> wrote:
>
>> Hi,
>>
>> I would like to grow the RAID1.
>>
>> - Raid1 size has about 50GB
>> - two HD partition (sda2, sdb2) have about 80GB+ (each)
>>
>> I do:
>>
>> # mdadm --grow /dev/md0 --size=max
>>
>> and I get the info, that the new size is 50GB. And I wonder: why not 80GB? The
>> size doesn't change! If I try to force size (--size=xxxxx), I get the message
>> that there is no space.
>>
>> What did I wrong?
>
> Probably used an ancient version of mdadm - more than a couple of months
> old :-)
>
> If you
> for i in /sys/block/md0/md/dev*/size
> do echo 0> $i
> done
> then try again it might work better.
>
> Newer mdadm (since May 2011) do this for you.
>
> If you look at the "mdadm -E /dev/sda2" output before and after you will
> notice that "Avail Dev Size" changes.
>
> You can achieve the same effect by stopping the array, the assembling it
> with --update=devicesize
>
> mdadm --stop /dev/md0
> mdadm --assemble /dev/md0 --update=devicesize /dev/sd[ab]2
> mdadm --grow /dev/md0 --size=max
>
> NeilBrown
[...]
Hi,
Yes, that helped!
Bevore:
Avail Dev Size : 104855552 (50.00 GiB 53.69 GB)
Array Size : 104855552 (50.00 GiB 53.69 GB)
# echo 0 > /sys/block/md1/md/dev-sda2/size
After:
Avail Dev Size : 175625584 (83.74 GiB 89.92 GB)
Array Size : 104855552 (50.00 GiB 53.69 GB)
Used Dev Size : 104855552 (50.00 GiB 53.69 GB)
And now:
# mdadm --grow /dev/md1 --size=max
works as expected
thank's a lot
best regards
Sergiusz
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