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(In reply to comment #4)
> Patches in bug 818876 also fix this one.
> https://bugzilla.redhat.com/show_bug.cgi?id=818876#c5
I'll close as duplicate to speed up the process (even though they're not the exact same use-case, they're very similar and share the same root cause).
*** This bug has been marked as a duplicate of bug 818876 ***
Description of problem: ------------------------- after mirroring with iscsi, i/o error, guest stopped. Version-Release number of selected component (if applicable): -------------------------------------------------------------- qemu-kvm-rhev-0.12.1.2-2.288.el6.x86_64 How reproducible: ----------------- 1/1 Steps to Reproduce: -------------------- 1.boot guest with lun 1: -drive file=/dev/disk/by-path/ip-10.66.9.64\:3260-iscsi-iqn.2001-04.com.example\:storage.disk1.amiens.sys1.xyz-lun-1,cache=none,if=none,rerror=stop,werror=stop,id=drive-virtio-disk0,format=qcow2 -device virtio-blk-pci,drive=drive-virtio-disk0,id=device-virtio-disk0 [root@shu ~]# lsof -a -p 31654 | grep dev qemu-kvm 31654 root DEL REG 0,4 235845 /dev/zero qemu-kvm 31654 root DEL REG 0,4 235826 /dev/zero qemu-kvm 31654 root 0u CHR 136,0 0t0 3 /dev/pts/0 qemu-kvm 31654 root 1u CHR 136,0 0t0 3 /dev/pts/0 qemu-kvm 31654 root 2u CHR 136,0 0t0 3 /dev/pts/0 qemu-kvm 31654 root 7u CHR 10,232 0t0 11828 /dev/kvm qemu-kvm 31654 root 11u CHR 10,200 0t0 9192 /dev/net/tun qemu-kvm 31654 root 12u BLK 8,16 0x1c0000000 235632 /dev/sdb 2.create a snapshot to lun 2: (qemu) snapshot_blkdev drive-virtio-disk0 /dev/disk/by-path/ip-10.66.9.64:3260-iscsi-iqn.2001-04.com.example:storage.disk1.amiens.sys1.xyz-lun-2 qcow2 (qemu) info block drive-virtio-disk0: removable=0 io-status=ok file=/dev/disk/by-path/ip-10.66.9.64:3260-iscsi-iqn.2001-04.com.example:storage.disk1.amiens.sys1.xyz-lun-2 backing_file=/dev/disk/by-path/ip-10.66.9.64:3260-iscsi-iqn.2001-04.com.example:storage.disk1.amiens.sys1.xyz-lun-1 ro=0 drv=qcow2 encrypted=0 [root@shu ~]# lsof -a -p 31654 | grep dev qemu-kvm 31654 root DEL REG 0,4 235845 /dev/zero qemu-kvm 31654 root DEL REG 0,4 235826 /dev/zero qemu-kvm 31654 root 0u CHR 136,0 0t0 3 /dev/pts/0 qemu-kvm 31654 root 1u CHR 136,0 0t0 3 /dev/pts/0 qemu-kvm 31654 root 2u CHR 136,0 0t0 3 /dev/pts/0 qemu-kvm 31654 root 7u CHR 10,232 0t0 11828 /dev/kvm qemu-kvm 31654 root 11u CHR 10,200 0t0 9192 /dev/net/tun qemu-kvm 31654 root 12u BLK 8,16 0x1c0000000 235632 /dev/sdb qemu-kvm 31654 root 23u BLK 8,32 0x1c0000000 235635 /dev/sdc 3.mirroring to lun 3: { "execute" : "__com.redhat_drive-mirror", "arguments" : { "device" : "drive-virtio-disk0", "target" : "/dev/disk/by-path/ip-10.66.9.64:3260-iscsi-iqn.2001-04.com.example:storage.disk1.amiens.sys1.xyz-lun-3", "format": "qcow2", "mode": "absolute-paths", "full" : true } } {"return": {}} [root@shu ~]# lsof -a -p 31654 | grep dev qemu-kvm 31654 root DEL REG 0,4 235845 /dev/zero qemu-kvm 31654 root DEL REG 0,4 235826 /dev/zero qemu-kvm 31654 root 0u CHR 136,0 0t0 3 /dev/pts/0 qemu-kvm 31654 root 1u CHR 136,0 0t0 3 /dev/pts/0 qemu-kvm 31654 root 2u CHR 136,0 0t0 3 /dev/pts/0 qemu-kvm 31654 root 7u CHR 10,232 0t0 11828 /dev/kvm qemu-kvm 31654 root 11u CHR 10,200 0t0 9192 /dev/net/tun qemu-kvm 31654 root 12u BLK 8,16 0x1c0000000 235632 /dev/sdb qemu-kvm 31654 root 23u BLK 8,32 0x1c0000000 235635 /dev/sdc qemu-kvm 31654 root 25u BLK 8,48 0x1c0000000 235639 /dev/sdd 4.after steady state, reopen to lun 3: { "execute": "__com.redhat_drive-reopen", "arguments": {"device": "drive-virtio-disk0", "new-image-file": "/dev/disk/by-path/ip-10.66.9.64:3260-iscsi-iqn.2001-04.com.example:storage.disk1.amiens.sys1.xyz-lun-3", "format": "qcow2" } } {"timestamp": {"seconds": 1336123595, "microseconds": 260749}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "drive-virtio-disk0", "len": 7516192768, "offset": 7516192768, "speed": 0, "type": "mirror"}} {"error": {"class": "OpenFileFailed", "desc": "Could not open '/dev/disk/by-path/ip-10.66.9.64:3260-iscsi-iqn.2001-04.com.example:storage.disk1.amiens.sys1.xyz-lun-2'", "data": {"filename": "/dev/disk/by-path/ip-10.66.9.64:3260-iscsi-iqn.2001-04.com.example:storage.disk1.amiens.sys1.xyz-lun-2"}}} {"timestamp": {"seconds": 1336123608, "microseconds": 86257}, "event": "BLOCK_IO_ERROR", "data": {"device": "drive-virtio-disk0", "__com.redhat_debug_info": {"message": "Input/output error", "errno": 5}, "__com.redhat_reason": "eio", "operation": "write", "action": "stop"}} {"timestamp": {"seconds": 1336123608, "microseconds": 86567}, "event": "STOP"} [root@shu ~]# lsof -a -p 31654 | grep dev qemu-kvm 31654 root DEL REG 0,4 235845 /dev/zero qemu-kvm 31654 root DEL REG 0,4 235826 /dev/zero qemu-kvm 31654 root 0u CHR 136,0 0t0 3 /dev/pts/0 qemu-kvm 31654 root 1u CHR 136,0 0t0 3 /dev/pts/0 qemu-kvm 31654 root 2u CHR 136,0 0t0 3 /dev/pts/0 qemu-kvm 31654 root 7u CHR 10,232 0t0 11828 /dev/kvm qemu-kvm 31654 root 11u CHR 10,200 0t0 9192 /dev/net/tun [root@shu ~]# ls /dev/disk/by-path/ ip-10.66.9.64:3260-iscsi-iqn.2001-04.com.example:storage.disk1.amiens.sys1.xyz-lun-1 pci-0000:00:1f.2-scsi-0:0:0:0-part1 ip-10.66.9.64:3260-iscsi-iqn.2001-04.com.example:storage.disk1.amiens.sys1.xyz-lun-2 pci-0000:00:1f.2-scsi-0:0:0:0-part2 ip-10.66.9.64:3260-iscsi-iqn.2001-04.com.example:storage.disk1.amiens.sys1.xyz-lun-3 pci-0000:00:1f.2-scsi-2:0:0:0 pci-0000:00:1f.2-scsi-0:0:0:0 Additional info: ------------------ after the i/o error: [root@shu ~]# qemu-img info /dev/sdb image: /dev/sdb file format: qcow2 virtual size: 7.0G (7516192768 bytes) disk size: 0 cluster_size: 65536 [root@shu ~]# qemu-img info /dev/sdc image: /dev/sdc file format: qcow2 virtual size: 7.0G (7516192768 bytes) disk size: 0 cluster_size: 65536 backing file: /dev/disk/by-path/ip-10.66.9.64:3260-iscsi-iqn.2001-04.com.example:storage.disk1.amiens.sys1.xyz-lun-1 (actual path: /dev//dev/disk/by-path/ip-10.66.9.64:3260-iscsi-iqn.2001-04.com.example:storage.disk1.amiens.sys1.xyz-lun-1) [root@shu ~]# qemu-img info /dev/sdd image: /dev/sdd file format: qcow2 virtual size: 7.0G (7516192768 bytes) disk size: 0 cluster_size: 65536