Running htop showed one CPU core pegged 100% doing I/O operations. Reshape Status : 9% complete Delta Devices : 2, (6->8) State : clean, degraded, reshaping Active Devices : 7 Working Devices : 8 Failed Devices : 0 Spare Devices : 1 Here's recent output from mdadm -detail: /dev/md1: Once I killed watch -n 1 mdadm, that stopped too.
However 9% into the process, all I/O on the array stopped except 100% reads on /dev/sdb and /dev/sdb1. While rebuild was going on I could access the array. I was running watch -n 1 mdadm -detail /dev/md1 The only oddity was that backup file wasn't created. Here's the sequence of what I ran: 1) vgcreate vg_sdi_sdj /dev/sdi1 /dev/sdj1Ģ) vgcreate vg_sdj_sdl /dev/sdk1 /dev/sdl1ģ) lvcreate -l 100%FREE -n all vg_sdi_sdjĤ) lvcreate -l 100%FREE -n all vg_sdk_sdlĥ) mdadm -manage /dev/md1 -add /dev/sdg1Ħ) mdadm -manage /dev/md1 -add /dev/vg_sdi_sdj/allħ) mdadm -manage /dev/md1 -add /dev/vg_sdk_sdl/allĨ) mdadm -manage /dev/md1 -fail /dev/sdc1ĩ) mdadm -grow -raid-devices=8 -backup-file=/home/andrei/grow_md1.bak /dev/md1Īt first everything was going almost smoothly. Since I only had smaller disks for (3) I used LVM to join smaller disks in volumes that were larger than 4TB I decided to do several things in one operation:ģ) add a few more disks to the array and grow it
Smartd reported that one of the disks started failing. I had a working RAID5 array consisting of 6 4TB disks.
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