From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Rabbitson Subject: Problem with raid5 grow/resize (not restripe) Date: Wed, 23 Jan 2008 02:25:39 +0100 Message-ID: <47969793.9040105@rabbit.us> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hello, I can not seem to be able to extend slightly a raid volume of mine. I issue the command: mdadm --grow --size=max /dev/md5 it completes and nothing happens. The kernel log is empty, however the even counter on the drive is incremented by +3. Here is what I have (yes I know that I am resizing only by about 200MB). Why am I not able to reach 824.8GiB? Thank you for your help. root@Thesaurus:~# cat /proc/mdstat Personalities : [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] md5 : active raid5 sda3[4] sdd3[3] sdc3[2] sdb3[1] 864276480 blocks super 1.1 level 5, 2048k chunk, algorithm 2 [4/4] [UUUU] md10 : active raid10 sdd2[3] sdc2[2] sdb2[1] sda2[0] 5353472 blocks 1024K chunks 3 far-copies [4/4] [UUUU] md1 : active raid1 sdd1[1] sdc1[0] sdb1[3] sda1[2] 56128 blocks [4/4] [UUUU] unused devices: root@Thesaurus:~# root@Thesaurus:~# mdadm -D /dev/md5 /dev/md5: Version : 01.01.03 Creation Time : Tue Jan 22 03:52:42 2008 Raid Level : raid5 Array Size : 864276480 (824.24 GiB 885.02 GB) Used Dev Size : 576184320 (274.75 GiB 295.01 GB) Raid Devices : 4 Total Devices : 4 Preferred Minor : 5 Persistence : Superblock is persistent Update Time : Wed Jan 23 02:21:47 2008 State : clean Active Devices : 4 Working Devices : 4 Failed Devices : 0 Spare Devices : 0 Layout : left-symmetric Chunk Size : 2048K Name : Thesaurus:Crypta (local to host Thesaurus) UUID : 1decb2d1:ebf16128:a240938a:669b0999 Events : 5632 Number Major Minor RaidDevice State 4 8 3 0 active sync /dev/sda3 1 8 19 1 active sync /dev/sdb3 2 8 35 2 active sync /dev/sdc3 3 8 51 3 active sync /dev/sdd3 root@Thesaurus:~# root@Thesaurus:~# fdisk -l /dev/sd[abcd] Disk /dev/sda: 400.0 GB, 400088457216 bytes 255 heads, 63 sectors/track, 48641 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 1 7 56196 fd Linux raid autodetect /dev/sda2 8 507 4016250 fd Linux raid autodetect /dev/sda3 508 36385 288190035 83 Linux /dev/sda4 36386 48641 98446320 83 Linux Disk /dev/sdb: 320.0 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdb1 1 7 56196 fd Linux raid autodetect /dev/sdb2 8 507 4016250 fd Linux raid autodetect /dev/sdb3 508 36385 288190035 83 Linux /dev/sdb4 36386 38913 20306160 83 Linux Disk /dev/sdc: 300.0 GB, 300090728448 bytes 255 heads, 63 sectors/track, 36483 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdc1 1 7 56196 fd Linux raid autodetect /dev/sdc2 8 507 4016250 fd Linux raid autodetect /dev/sdc3 508 36385 288190035 83 Linux /dev/sdc4 36386 36483 787185 83 Linux Disk /dev/sdd: 300.0 GB, 300090728448 bytes 255 heads, 63 sectors/track, 36483 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdd1 1 7 56196 fd Linux raid autodetect /dev/sdd2 8 507 4016250 fd Linux raid autodetect /dev/sdd3 508 36385 288190035 83 Linux /dev/sdd4 36386 36483 787185 83 Linux root@Thesaurus:~#