Sure, replace the bad drive and rebuild build the mirror. Or add 2 drives, using one to replace the bad one and the other as a hot spare. Then if one of the 2 drives in the mirror fails again, the hot spare will take over for it.
Chris On Fri, Feb 7, 2014 at 3:47 PM, Matt <matt.mailingli...@gmail.com> wrote: > I am running software RAID1 on a somewhat critical server. Today I > noticed one drive is giving errors. Good thing I had RAID. I planned > on upgrading this server in next month or so. Just wandering if there > was an easy way to fix this to avoid rushing the upgrade? Having a > single drive is slowing down reads as well, I think. > > Thanks. > > > > > Feb 7 15:28:28 server smartd[2980]: Device: /dev/sdb [SAT], 1 > Currently unreadable (pending) sectors > Feb 7 15:28:28 server smartd[2980]: Device: /dev/sdb [SAT], 1 Offline > uncorrectable sectors > Feb 7 15:58:29 server smartd[2980]: Device: /dev/sdb [SAT], 1 > Currently unreadable (pending) sectors > Feb 7 15:58:29 server smartd[2980]: Device: /dev/sdb [SAT], 1 Offline > uncorrectable sectors > > > [root@server ~]# smartctl -H /dev/sda > > === START OF READ SMART DATA SECTION === > SMART overall-health self-assessment test result: PASSED > > [root@server ~]# smartctl -H /dev/sdb > > === START OF READ SMART DATA SECTION === > SMART overall-health self-assessment test result: PASSED > > [root@server ~]# df -h > Filesystem Size Used Avail Use% Mounted on > /dev/md2 1.4T 142G 1.2T 12% / > /dev/md0 99M 37M 58M 39% /boot > tmpfs 7.9G 20K 7.9G 1% /dev/shm > > > [root@server ~]# cat /proc/mdstat > Personalities : [raid1] > md0 : active raid1 sdb1[1] sda1[0] > 104320 blocks [2/2] [UU] > > md1 : active raid1 sdb2[1] sda2[0] > 8385856 blocks [2/2] [UU] > > md2 : active raid1 sdb3[2](F) sda3[0] > 1456645568 blocks [2/1] [U_] > > unused devices: <none> > > > [root@server ~]# mdadm --detail /dev/md2 > /dev/md2: > Version : 0.90 > Creation Time : Tue Jan 4 05:39:36 2011 > Raid Level : raid1 > Array Size : 1456645568 (1389.17 GiB 1491.61 GB) > Used Dev Size : 1456645568 (1389.17 GiB 1491.61 GB) > Raid Devices : 2 > Total Devices : 2 > Preferred Minor : 2 > Persistence : Superblock is persistent > > Update Time : Fri Feb 7 15:21:45 2014 > State : active, degraded > Active Devices : 1 > Working Devices : 1 > Failed Devices : 1 > Spare Devices : 0 > > Events : 0.758203 > > Number Major Minor RaidDevice State > 0 8 3 0 active sync /dev/sda3 > 1 0 0 1 removed > > 2 8 19 - faulty spare /dev/sdb3 > > > [root@server ~]# mdadm --detail /dev/md1 > /dev/md1: > Version : 0.90 > Creation Time : Tue Jan 4 05:39:36 2011 > Raid Level : raid1 > Array Size : 8385856 (8.00 GiB 8.59 GB) > Used Dev Size : 8385856 (8.00 GiB 8.59 GB) > Raid Devices : 2 > Total Devices : 2 > Preferred Minor : 1 > Persistence : Superblock is persistent > > Update Time : Fri Feb 7 14:29:36 2014 > State : clean > Active Devices : 2 > Working Devices : 2 > Failed Devices : 0 > Spare Devices : 0 > > Events : 0.460 > > Number Major Minor RaidDevice State > 0 8 2 0 active sync /dev/sda2 > 1 8 18 1 active sync /dev/sdb2 > > > [root@server ~]# mdadm --detail /dev/md0 > /dev/md0: > Version : 0.90 > Creation Time : Tue Jan 4 05:48:17 2011 > Raid Level : raid1 > Array Size : 104320 (101.89 MiB 106.82 MB) > Used Dev Size : 104320 (101.89 MiB 106.82 MB) > Raid Devices : 2 > Total Devices : 2 > Preferred Minor : 0 > Persistence : Superblock is persistent > > Update Time : Wed Feb 5 11:02:25 2014 > State : clean > Active Devices : 2 > Working Devices : 2 > Failed Devices : 0 > Spare Devices : 0 > > Events : 0.460 > > Number Major Minor RaidDevice State > 0 8 1 0 active sync /dev/sda1 > 1 8 17 1 active sync /dev/sdb1 > _______________________________________________ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > -- Chris Stone AxisInternet, Inc. www.axint.net _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
