Look in /var/log/messages Or grep " md: " /var/log/messages|more I don't know the details of a sync. But for RAID1, it bet it's mostly just a copy. It does need to handle changes while syncing. Just don't know how it handles it. Guy -----Original Message----- From: linux-raid-owner@vger.kernel.org [mailto:linux-raid-owner@vger.kernel.org] On Behalf Of James R Bamford Sent: Thursday, December 11, 2003 7:08 PM To: Guy; 'Linux-raid maillist' Subject: RE: Raid array not clean (its barely used and a few weeks old.. how can i find out what went wrong?) Thanks Guy.. I'll keep an eye on it.. its a shame there is no log kept of all raid errors, warnings, successes so you could look back and see.. another thing is its a shame its not more visible that there is a problem.. obviously i could get it so consoles show info on startup but this being hidden probably meant i rebooted many a time whilst it was resyncing without finishing.. WHat is the scheme for a resync will it just make one drive equal the other.. my data all looks intact Cheers Jim > -----Original Message----- > From: linux-raid-owner@vger.kernel.org > [mailto:linux-raid-owner@vger.kernel.org]On Behalf Of Guy > Sent: 11 December 2003 01:50 > To: 'James R Bamford'; 'Linux-raid maillist' > Subject: RE: Raid array not clean (its barely used and a few weeks old.. > how can i find out what went wrong?) > > > This is normal, if... Your system crashed. > The system is syncing the mirror. > Try this command to see the status: > cat /proc/mdstat > > If your system resyncs each time you re-boot then some is wrong. > If you re-boot before it is done, it will start over from the beginning. > > The default max speed if 10000K per second. > > Issue this command to change the speed now. > echo 100000 > /proc/sys/dev/raid/speed_limit_max > > If you want the change to be permanent, add these 2 lines to > /etc/sysctl.conf > # RAID rebuild max speed per device > dev.raid.speed_limit_max = 100000 > > The speed can be whatever you want. I use 100000, which is much > faster than > possible for my system. Oh! 100000 is 100000K bytes per second > per device. > So if you have 2 disks, they will attempt 100Meg per second each! > > Based you the size of your disks, the resync will take just over > 2 hours, at > 10000K per second. Your disks should be much faster. > > Guy > > -----Original Message----- > From: linux-raid-owner@vger.kernel.org > [mailto:linux-raid-owner@vger.kernel.org] On Behalf Of James R Bamford > Sent: Wednesday, December 10, 2003 8:03 PM > To: Linux-raid maillist > Subject: Raid array not clean (its barely used and a few weeks > old.. how can > i find out what went wrong?) > > Ok, > > I'm still trying to get this system actually setup and working > and i noticed > this on my dmesg today.. > > md: autorun ... > md: considering hdg1 ... > md: adding hdg1 ... > md: adding hde1 ... > md: created md0 > md: bind<hde1,1> > md: bind<hdg1,2> > md: running: <hdg1><hde1> > md: hdg1's event counter: 0000002d > md: hde1's event counter: 0000002d > md: md0: raid array is not clean -- starting background reconstruction > md: raid1 personality registered as nr 3 > md0: max total readahead window set to 124k > md0: 1 data-disks, max readahead per data-disk: 124k > raid1: device hdg1 operational as mirror 1 > raid1: device hde1 operational as mirror 0 > raid1: raid set md0 not clean; reconstructing mirrors > raid1: raid set md0 active with 2 out of 2 mirrors > md: updating md0 RAID superblock on device > md: hdg1 [events: 0000002e]<6>(write) hdg1's sb offset: 156288256 > md: syncing RAID array md0 > md: minimum _guaranteed_ reconstruction speed: 100 KB/sec/disc. > md: using maximum available idle IO bandwith (but not more than 10000 > KB/sec) for reconstruction. > md: using 124k window, over a total of 156288256 blocks. > md: hde1 [events: 0000002e]<6>(write) hde1's sb offset: 156288256 > md: ... autorun DONE. > > > What does it mean, is it anythign to worry about?!? i've been > trying to get > wake on lan to work and have been blindly powering off the machine, i am > pretty certain that this was done before it has a chance to boot > into linux > (no monitor connected tho as its a backup server) .. anyways is this > indicative of any hdd errors? how can you get more info on what caused the > problems or can't you!? > > With this reconstruction will i have all my files, some of them, none of > them!? does it choose one disk and basically the sync the other one up to > it!? > > Cheers > > Jim > > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
