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 > > 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 > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html
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