Red Hat Bugzilla – Bug 1299648
kpartx on multipath device returning before creation of dm partition device
Last modified: 2016-11-04 04:16:24 EDT
kpartx now runs it sync mode by default.
Reproduced on device-mapper-multipath-0.4.9-77.el7 1). # rpm -qa | grep kpartx kpartx-0.4.9-77.el7.x86_64 2). # rpm -qa | grep multipath device-mapper-multipath-libs-0.4.9-77.el7.x86_64 device-mapper-multipath-0.4.9-77.el7.x86_64 device-mapper-multipath-sysvinit-0.4.9-87.el7.x86_64 3). Execute script mentioned to reproduce 2+0 records in 2+0 records out 2147483648 bytes (2.1 GB) copied, 2.42782 s, 885 MB/s sfdisk: Warning: /var/tmp/imgtst.img is not a block device sfdisk: Disk /var/tmp/imgtst.img: cannot get geometry Disk /var/tmp/imgtst.img: 261 cylinders, 255 heads, 63 sectors/track sfdisk: /var/tmp/imgtst.img: unrecognized partition table type Old situation: sfdisk: No partitions found New situation: Units: cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0 Device Boot Start End #cyls #blocks Id System /var/tmp/imgtst.img1 0+ 259 260- 2088449+ 83 Linux /var/tmp/imgtst.img2 0 - 0 0 0 Empty /var/tmp/imgtst.img3 0 - 0 0 0 Empty /var/tmp/imgtst.img4 0 - 0 0 0 Empty Warning: no primary partition is marked bootable (active) This does not matter for LILO, but the DOS MBR will not boot this disk. Successfully wrote the new partition table If you created or changed a DOS partition, /dev/foo7, say, then use dd(1) to zero the first 512 bytes: dd if=/dev/zero of=/dev/foo7 bs=512 count=1 (See fdisk(8).) add map loop0p1 (253:5): 0 4176899 linear /dev/loop0 1 NO: 313085087 NO: 316822069 NO: 319848978 NO: 323203567 NO: 326373389 NO: 329500389 NO: 332653052 NO: 336869907 NO: 339931134 NO: 343157047 NO: 346240276 NO: 349212883 NO: 352183837 NO: 355079186 NO: 358050272 OK: 361472619 Verified on device-mapper-multipath-0.4.9-87.el7 1). # rpm -qa | grep kpartx kpartx-0.4.9-87.el7.x86_64 2). # rpm -qa | grep multipath device-mapper-multipath-0.4.9-87.el7.x86_64 device-mapper-multipath-sysvinit-0.4.9-87.el7.x86_64 device-mapper-multipath-libs-0.4.9-87.el7.x86_64 3). Execute script mentioned to reproduce 2+0 records in 2+0 records out 2147483648 bytes (2.1 GB) copied, 1.34744 s, 1.6 GB/s sfdisk: Warning: /var/tmp/imgtst.img is not a block device sfdisk: Disk /var/tmp/imgtst.img: cannot get geometry Disk /var/tmp/imgtst.img: 261 cylinders, 255 heads, 63 sectors/track sfdisk: /var/tmp/imgtst.img: unrecognized partition table type Old situation: sfdisk: No partitions found New situation: Units: cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0 Device Boot Start End #cyls #blocks Id System /var/tmp/imgtst.img1 0+ 259 260- 2088449+ 83 Linux /var/tmp/imgtst.img2 0 - 0 0 0 Empty /var/tmp/imgtst.img3 0 - 0 0 0 Empty /var/tmp/imgtst.img4 0 - 0 0 0 Empty Warning: no primary partition is marked bootable (active) This does not matter for LILO, but the DOS MBR will not boot this disk. Successfully wrote the new partition table If you created or changed a DOS partition, /dev/foo7, say, then use dd(1) to zero the first 512 bytes: dd if=/dev/zero of=/dev/foo7 bs=512 count=1 (See fdisk(8).) add map loop0p1 (253:5): 0 4176899 linear /dev/loop0 1 OK: 114357926 Test result: device mapper partition device is created prior to the kpartx command returning
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2016-2536.html