* mdadm doesn't wont to grow - help please
@ 2012-05-14 13:49 Sergiusz Brzeziński
2012-05-15 0:14 ` NeilBrown
0 siblings, 1 reply; 3+ messages in thread
From: Sergiusz Brzeziński @ 2012-05-14 13:49 UTC (permalink / raw)
To: linux-raid
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?
Bellow some facts about my configuration.
Please help.
Thank You in advance
Sergiusz Brzeziński
-----------------------------------------------
# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Wed Mar 30 07:25:47 2011
Raid Level : raid1
Array Size : 52427776 (50.00 GiB 53.69 GB)
Used Dev Size : 52427776 (50.00 GiB 53.69 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon May 14 09:16:16 2012
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : linux-uo1f.site:1
UUID : 603ab02b:f8e9c2b9:863ce780:7f8dfca7
Events : 5472151
Number Major Minor RaidDevice State
2 8 2 0 active sync /dev/sda2
4 8 18 1 active sync /dev/sdb2
# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sda2[2] sdb2[4]
52427776 blocks super 1.2 [2/2] [UU]
unused devices: <none>
# fdisk /dev/sdb
Disk /dev/sdb: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0008f6dc
Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 208895 103424 83 Linux
/dev/sdb2 208896 625142447 312466776 fd Linux raid autodetect
# fdisk /dev/sda
Disk /dev/sda: 90.0 GB, 90028302336 bytes
255 heads, 63 sectors/track, 10945 cylinders, total 175836528 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x08e607c5
Device Boot Start End Blocks Id System
/dev/sda1 2048 208895 103424 83 Linux
/dev/sda2 208896 175836527 87813816 fd Linux raid autodetect
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: mdadm doesn't wont to grow - help please
2012-05-14 13:49 mdadm doesn't wont to grow - help please Sergiusz Brzeziński
@ 2012-05-15 0:14 ` NeilBrown
2012-05-15 10:04 ` Sergiusz Brzeziński
0 siblings, 1 reply; 3+ messages in thread
From: NeilBrown @ 2012-05-15 0:14 UTC (permalink / raw)
To: Sergiusz Brzeziński; +Cc: linux-raid
[-- Attachment #1: Type: text/plain, Size: 3640 bytes --]
On Mon, 14 May 2012 15:49:53 +0200 Sergiusz Brzeziński
<Sergiusz.Brzezinski@supersystem.pl> 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
>
> Bellow some facts about my configuration.
>
> Please help.
>
> Thank You in advance
>
> Sergiusz Brzeziński
> -----------------------------------------------
>
> # mdadm --detail /dev/md0
>
> /dev/md0:
> Version : 1.2
> Creation Time : Wed Mar 30 07:25:47 2011
> Raid Level : raid1
> Array Size : 52427776 (50.00 GiB 53.69 GB)
> Used Dev Size : 52427776 (50.00 GiB 53.69 GB)
> Raid Devices : 2
> Total Devices : 2
> Persistence : Superblock is persistent
>
> Update Time : Mon May 14 09:16:16 2012
> State : clean
> Active Devices : 2
> Working Devices : 2
> Failed Devices : 0
> Spare Devices : 0
>
> Name : linux-uo1f.site:1
> UUID : 603ab02b:f8e9c2b9:863ce780:7f8dfca7
> Events : 5472151
>
> Number Major Minor RaidDevice State
> 2 8 2 0 active sync /dev/sda2
> 4 8 18 1 active sync /dev/sdb2
>
>
>
> # cat /proc/mdstat
>
> Personalities : [raid1]
> md0 : active raid1 sda2[2] sdb2[4]
> 52427776 blocks super 1.2 [2/2] [UU]
>
> unused devices: <none>
>
>
> # fdisk /dev/sdb
>
> Disk /dev/sdb: 320.1 GB, 320072933376 bytes
> 255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors
> Units = sectors of 1 * 512 = 512 bytes
> Sector size (logical/physical): 512 bytes / 512 bytes
> I/O size (minimum/optimal): 512 bytes / 512 bytes
> Disk identifier: 0x0008f6dc
>
> Device Boot Start End Blocks Id System
> /dev/sdb1 * 2048 208895 103424 83 Linux
> /dev/sdb2 208896 625142447 312466776 fd Linux raid autodetect
>
>
> # fdisk /dev/sda
>
> Disk /dev/sda: 90.0 GB, 90028302336 bytes
> 255 heads, 63 sectors/track, 10945 cylinders, total 175836528 sectors
> Units = sectors of 1 * 512 = 512 bytes
> Sector size (logical/physical): 512 bytes / 512 bytes
> I/O size (minimum/optimal): 512 bytes / 512 bytes
> Disk identifier: 0x08e607c5
>
> Device Boot Start End Blocks Id System
> /dev/sda1 2048 208895 103424 83 Linux
> /dev/sda2 208896 175836527 87813816 fd Linux raid autodetect
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> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
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> More majordomo info at http://vger.kernel.org/majordomo-info.html
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: mdadm doesn't wont to grow - help please
2012-05-15 0:14 ` NeilBrown
@ 2012-05-15 10:04 ` Sergiusz Brzeziński
0 siblings, 0 replies; 3+ messages in thread
From: Sergiusz Brzeziński @ 2012-05-15 10:04 UTC (permalink / raw)
To: linux-raid
W dniu 15.05.2012 02:14, NeilBrown pisze:
> On Mon, 14 May 2012 15:49:53 +0200 Sergiusz Brzeziński
> <Sergiusz.Brzezinski@supersystem.pl> 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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2012-05-14 13:49 mdadm doesn't wont to grow - help please Sergiusz Brzeziński
2012-05-15 0:14 ` NeilBrown
2012-05-15 10:04 ` Sergiusz Brzeziński
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