On Thu, October 15, 2009 9:39 am, aristizb@xxxxxxxxxxx wrote: > Hello, > > I have a RAID1 with 2 LVM disks and I am running into a strange > situation where having the 2 disks connected to the array the bitmap > never clears the dirty chunks. That shouldn't happen... What versions of mdadm and the Linux kernel are you using? NeilBrown > > I am assuming also that when a RAID1 is in write-through mode, the > bitmap indicates that all the data has made it to all the disks if > there are no dirty chunks using mdadm --examine-bitmap. > > The output of cat /proc/mdstat is: > > md2060 : active raid1 dm-5[1] dm-6[0] > 2252736 blocks [2/2] [UU] > bitmap: 1/275 pages [12KB], 4KB chunk, file: /tmp/md2060bm > > > The output of mdadm --examine-bitmap /tmp/md2060bm is: > > Filename : md2060bm > Magic : 6d746962 > Version : 4 > UUID : ad5fb74c:bb1c654a:087b2595:8a5d04a9 > Events : 12 > Events Cleared : 12 > State : OK > Chunksize : 4 KB > Daemon : 5s flush period > Write Mode : Normal > Sync Size : 2252736 (2.15 GiB 2.31 GB) > Bitmap : 563184 bits (chunks), 3 dirty (0.0%) > > > Having the array under no IO, I waited 30 minutes but the dirty data > never gets clear from the bitmap, so I presume the disks are not in > sync; but after I ran a block by block comparison of the two devices I > found that they are equal. > > The superblocks and the external bitmap tell me that all the events > are cleared, so I am confused on why the bitmap never goes to 0 dirty > chunks. > > How can I tell if the disks are in sync? > > > Thank you in advance for any help. > > > -- > Juan Aristizabal > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > 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@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
