Hi All Redhat Enterprise Linux AS update 4 patched up-to-date: 2.6.9-42.0.2.ELsmp #1 SMP Thu Aug 17 17:57:31 EDT 2006 x86_64 x86_64 x86_64 GNU/Linux ------------------------------------------------------------------------------------- I reckon somebody must have encountered this, but I will report this anyway. I have set up mirroring as /dev/md1 on the following multipath devices /dev/mapper/3600d02300067d2b107ad9a43303d8200 /dev/mapper/3600d02300067d2f707d12552c2821300. I have used lvms to create physical volume, volume group, and a logical volume on it. I can shutdown /dev/md1 using "mdadm --stop /dev/md1" and restart it after all the above steps except the logical volume creation. I cannot shut down /dev/md1 once the logical volume is created: I get the following message: mdadm: fail to stop array /dev/md1: Device or resource busy The device is not mounted. dmesetup says: > dmsetup info -c Name Maj Min Stat Open Targ Event UUID www_vg_01-www_lv_01 253 2 L--w 1 1 0 LVM-138joBnlTj4A60wh1AqTEriQ2Tfczwyj8ckKOs70a8K2FcQjhwdx6M1e6ge48GVH 3600d02300067d2b107ad9a43303d8200 253 0 L--w 1 1 1 mpath-3600d02300067d2b107ad9a43303d8200 3600d02300067d2f707d12552c2821300 253 1 L--w 1 1 1 mpath-3600d02300067d2f707d12552c2821300 Regards, Jie -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel