I think, there is a race condition in lvcreate while makeing a new snapshot. System: Tyan with 2 Opteron 246 xen 3.0.2-3 linux 2.6.16.13 lvm 2.02.07 3ware-Raid 9550 Raid5 Under xen i was unable to create a snapshot, I got always "LV system/snap in use: not deactivating". Without xen, i got occasionally a snapshot. After i make a "dirty hack": ------ begin ---------- *** old/lvcreate.c 2006-06-10 19:22:37.000000000 +0200 --- lvcreate.c 2006-06-10 19:23:04.000000000 +0200 *************** *** 776,781 **** --- 776,787 ---- /* Reset permission after zeroing */ if (!(lp->permission & LVM_WRITE)) lv->status &= ~LVM_WRITE; + + { struct timeval tv ; + tv.tv_sec=10; + tv.tv_usec=0; + select(2, 0, 0, 0, &tv); + } if (!deactivate_lv(cmd, lv)) { log_err("Couldn't deactivate new snapshot."); return 0; ------ end --------- i got always a snapshot (on all 3 systems!). I think, there is an other thread which is creating the new lv, and it will take longer as the lvcreate will "think". I have to less knowledge to make a patch, which is waiting for the correct event (creating lv complete). -- regards Robert Valentan _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/