At Mon, 14 Feb 2011 20:13:31 +0200 CentOS mailing list <centos at centos.org> wrote: > > Hi List, > > What this means? > > md: syncing RAID array md0 > md: minimum _guaranteed_ reconstruction speed: 1000 KB/sec/disc. > md: using maximum available idle IO bandwidth (but not more than > 200000 KB/sec) for reconstruction. > md: using 128k window, over a total of 2096384 blocks. > md: md0: sync done. > RAID1 conf printout: > --- wd:2 rd:2 > disk 0, wo:0, o:1, dev:sda2 > disk 1, wo:0, o:1, dev:sdb2 > sd 0:0:0:0: SCSI error: return code = 0x06000000 > end_request: I/O error, dev sda, sector 451792231 > raid1: sda1: rescheduling sector 451792168 > sd 0:0:0:0: SCSI error: return code = 0x06000000 > end_request: I/O error, dev sda, sector 451792263 > raid1: sda1: rescheduling sector 451792200 > raid1: sdb1: redirecting sector 451792168 to another mirror > raid1: sdb1: redirecting sector 451792200 to another mirror > md: syncing RAID array md0 > md: minimum _guaranteed_ reconstruction speed: 1000 KB/sec/disc. > md: using maximum available idle IO bandwidth (but not more than > 200000 KB/sec) for reconstruction. > md: using 128k window, over a total of 2096384 blocks. > md: md0: sync done. > RAID1 conf printout: > --- wd:2 rd:2 > disk 0, wo:0, o:1, dev:sda2 > disk 1, wo:0, o:1, dev:sdb2 > > note lines: > > sd 0:0:0:0: SCSI error: return code = 0x06000000 > end_request: I/O error, dev sda, sector 451792263 > raid1: sda1: rescheduling sector 451792200 > raid1: sdb1: redirecting sector 451792168 to another mirror > raid1: sdb1: redirecting sector 451792200 to another mirror > > Is one disk going down? cat /proc/mdstat still shows software raid > array as working one. One disk is probably starting to fail. Are you getting SMART errors? Have a look in /var/log/messages for smartd messages as well as kernel I/O errors. -- Robert Heller -- 978-544-6933 / heller at deepsoft.com Deepwoods Software -- http://www.deepsoft.com/ () ascii ribbon campaign -- against html e-mail /\ www.asciiribbon.org -- against proprietary attachments