From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anugraha Sinha Subject: Re: RAID6 reshape stalls immediately Date: Fri, 6 Nov 2015 22:54:44 +0900 Message-ID: <563CB124.5010409@gmail.com> References: <84a8qtgwqk.wl-peter.chubb@nicta.com.au> <563CAFC1.2080708@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <563CAFC1.2080708@gmail.com> Sender: linux-raid-owner@vger.kernel.org To: Peter Chubb , linux-raid@vger.kernel.org List-Id: linux-raid.ids Dear Peter, Also please follow one of the mails over linux-raid mailing list. Subject : RAID6 reshape stalls immediately It discusses a similar problem, when giving backup-file. Regards Anugraha On 11/6/2015 10:48 PM, Anugraha Sinha wrote: > Dear Peter, > > What happening on the root partition where you are trying to take a backup? > > Any I/O, filesize etc? > > Also could you share the output of mdadm --examine members individually? > > On 11/5/2015 8:39 AM, Peter Chubb wrote: >> Hi Folks, >> I added two disks to my RAID5 array then attempted to reshape it to >> RAID 6. And it has been sitting on 0% complete, with no disk I/O >> for 24 hours now. >> >> Is there any way to kick the reshape process? >> >> /proc/mdstat is: >> >> Personalities : [raid6] [raid5] [raid4] >> md0 : active raid6 sdi1[6] sdh1[5] sdd1[4] sde1[2] sdb1[1] sda1[0] >> 5860122624 blocks super 1.2 level 6, 512k chunk, algorithm 18 >> [6/5] [UUUU_U] >> [>....................] reshape = 0.0% (0/1953374208) >> finish=1308.7min speed=24099K/sec >> bitmap: 0/15 pages [0KB], 65536KB chunk >> >> unused devices: >> >> >> What I did: >> mdadm --add /dev/md0 /dev/sdh1 >> mdadm --add /dev/md0 /dev/sdi1 >> mdadm --grow /dev/md0 --level=6 --raid-devices=6 >> --backup-file=/root/raid5-backup >> >> dmesg reported: >> [691739.298345] md: bind >> [691739.364534] RAID conf printout: >> [691739.364537] --- level:5 rd:4 wd:4 >> [691739.364539] disk 0, o:1, dev:sda1 >> [691739.364540] disk 1, o:1, dev:sdb1 >> [691739.364541] disk 2, o:1, dev:sde1 >> [691739.364542] disk 3, o:1, dev:sdd1 >> [691741.832242] md: bind >> [691741.898470] RAID conf printout: >> [691741.898474] --- level:5 rd:4 wd:4 >> [691741.898476] disk 0, o:1, dev:sda1 >> [691741.898478] disk 1, o:1, dev:sdb1 >> [691741.898480] disk 2, o:1, dev:sde1 >> [691741.898481] disk 3, o:1, dev:sdd1 >> [691741.898482] RAID conf printout: >> [691741.898482] --- level:5 rd:4 wd:4 >> [691741.898484] disk 0, o:1, dev:sda1 >> [691741.898485] disk 1, o:1, dev:sdb1 >> [691741.898486] disk 2, o:1, dev:sde1 >> [691741.898487] disk 3, o:1, dev:sdd1 >> [691805.469105] md/raid:md0: device sdd1 operational as raid disk 3 >> [691805.469110] md/raid:md0: device sde1 operational as raid disk 2 >> [691805.469111] md/raid:md0: device sdb1 operational as raid disk 1 >> [691805.469112] md/raid:md0: device sda1 operational as raid disk 0 >> [691805.469551] md/raid:md0: allocated 5424kB >> [691805.506035] md/raid:md0: raid level 6 active with 4 out of 5 >> devices, algori >> thm 18 >> [691805.506050] RAID conf printout: >> [691805.506051] --- level:6 rd:5 wd:4 >> [691805.506053] disk 0, o:1, dev:sda1 >> [691805.506054] disk 1, o:1, dev:sdb1 >> [691805.506055] disk 2, o:1, dev:sde1 >> [691805.506056] disk 3, o:1, dev:sdd1 >> [691805.847329] RAID conf printout: >> [691805.847333] --- level:6 rd:6 wd:5 >> [691805.847335] disk 0, o:1, dev:sda1 >> [691805.847336] disk 1, o:1, dev:sdb1 >> [691805.847337] disk 2, o:1, dev:sde1 >> [691805.847338] disk 3, o:1, dev:sdd1 >> [691805.847340] disk 4, o:1, dev:sdi1 >> [691805.847350] RAID conf printout: >> [691805.847350] --- level:6 rd:6 wd:5 >> [691805.847351] disk 0, o:1, dev:sda1 >> [691805.847352] disk 1, o:1, dev:sdb1 >> [691805.847353] disk 2, o:1, dev:sde1 >> [691805.847354] disk 3, o:1, dev:sdd1 >> [691805.847354] disk 4, o:1, dev:sdi1 >> [691805.847355] disk 5, o:1, dev:sdh1 >> [691805.847424] md: reshape of RAID array md0 >> [691805.847426] md: minimum _guaranteed_ speed: 1000 KB/sec/disk. >> [691805.847428] md: using maximum available idle IO bandwidth (but not >> more than 200000 KB/sec) for reshape. >> [691805.847439] md: using 128k window, over a total of 1953374208k. >> >> And nothing since. >>