| Summary: | Unable to convert raid-0 to raid-4 | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Roman <rommer> |
| Component: | mdadm | Assignee: | Jes Sorensen <Jes.Sorensen> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Red Hat Kernel QE team <kernel-qe> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 6.2 | CC: | vgriit |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2012-02-06 13:20:08 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
Since RHEL 6.2 External Beta has begun, and this bug remains unresolved, it has been rejected as it is not proposed as exception or blocker. Red Hat invites you to ask your support representative to propose this request, if appropriate and relevant, in the next release of Red Hat Enterprise Linux. Roman, Does this happen when you try this on real disk and not just with loop devices? What kernel version are you running? Thanks, Jes Of course, I discovered bug using read devices. and what kernel version are you seeing it with? 2.6.32-131.21.1.el6.x86_64 Ok, I tried reproducing it using your details here, and I do not see
the problem you are reporting.
*However* you are not running 6.2, as 6.2 ships with mdadm-3.2.2-9,
whereas mdadm-3.2.2-6 was in the Alpha release.
Since this no longer seems to be an issue, I am going to close this
bug. If you can reproduce it on a clean 6.2 install, please report
back.
Thanks,
Jes
[root@monkeybay mnt]# truncate -s 100M d1
[root@monkeybay mnt]# truncate -s 100M d2
[root@monkeybay mnt]# truncate -s 100M d3
[root@monkeybay mnt]# losetup /dev/loop1 d1
[root@monkeybay mnt]# losetup /dev/loop2 d2
[root@monkeybay mnt]# losetup /dev/loop3 d3
[root@monkeybay mnt]# mdadm -C /dev/md0 -l 0 -c 64 -e 1.1 -n 3 /dev/loop1 /dev/loop2 /dev/loop3
mdadm: array /dev/md0 started.
[root@monkeybay mnt]# mdadm -G /dev/md0 -l 4
mdadm: level of /dev/md0 changed to raid4
[root@monkeybay mnt]# cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4] [raid10] [raid0]
md0 : active raid4 loop3[2] loop2[1] loop1[0]
304128 blocks super 1.1 level 4, 64k chunk, algorithm 5 [4/3] [UUU_]
md124 : active (auto-read-only) raid10 sdc2[1] sdb2[2] sdd2[3] sda2[0]
39063424 blocks 64K chunks 2 near-copies [4/4] [UUUU]
md125 : active (auto-read-only) raid5 sdb4[1] sdc4[2] sdd4[4] sda4[0]
58590720 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/4] [UUUU]
md126 : active (auto-read-only) raid1 sda3[0] sdb3[1]
19529656 blocks super 1.2 [2/2] [UU]
md127 : active (auto-read-only) raid10 sdc1[2] sda1[0] sdd1[3] sdb1[1]
39053184 blocks 64K chunks 2 near-copies [4/4] [UUUU]
unused devices: <none>
[root@monkeybay mnt]# uname -a
Linux monkeybay 2.6.32-221.el6.x86_64 #1 SMP Tue Nov 15 14:50:38 EST 2011 x86_64 x86_64 x86_64 GNU/Linux
[root@monkeybay mnt]# rpm -q mdadm
mdadm-3.2.2-9.el6.x86_64
Hi This issue is seen with loop device with varible size. I tried with two device size have same size and another one having variable size I got the following message [root@rajan rsync-3.0.9]# mdadm -G /dev/md81 -l 4 mdadm: /dev/md81: could not set level to raid4 (In reply to comment #7) > Ok, I tried reproducing it using your details here, and I do not see > the problem you are reporting. > > *However* you are not running 6.2, as 6.2 ships with mdadm-3.2.2-9, > whereas mdadm-3.2.2-6 was in the Alpha release. > > Since this no longer seems to be an issue, I am going to close this > bug. If you can reproduce it on a clean 6.2 install, please report > back. > > Thanks, > Jes > > [root@monkeybay mnt]# truncate -s 100M d1 > [root@monkeybay mnt]# truncate -s 100M d2 > [root@monkeybay mnt]# truncate -s 100M d3 > [root@monkeybay mnt]# losetup /dev/loop1 d1 > [root@monkeybay mnt]# losetup /dev/loop2 d2 > [root@monkeybay mnt]# losetup /dev/loop3 d3 > [root@monkeybay mnt]# mdadm -C /dev/md0 -l 0 -c 64 -e 1.1 -n 3 /dev/loop1 > /dev/loop2 /dev/loop3 > mdadm: array /dev/md0 started. > [root@monkeybay mnt]# mdadm -G /dev/md0 -l 4 > mdadm: level of /dev/md0 changed to raid4 > [root@monkeybay mnt]# cat /proc/mdstat > Personalities : [raid1] [raid6] [raid5] [raid4] [raid10] [raid0] > md0 : active raid4 loop3[2] loop2[1] loop1[0] > 304128 blocks super 1.1 level 4, 64k chunk, algorithm 5 [4/3] [UUU_] > > md124 : active (auto-read-only) raid10 sdc2[1] sdb2[2] sdd2[3] sda2[0] > 39063424 blocks 64K chunks 2 near-copies [4/4] [UUUU] > > md125 : active (auto-read-only) raid5 sdb4[1] sdc4[2] sdd4[4] sda4[0] > 58590720 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/4] [UUUU] > > md126 : active (auto-read-only) raid1 sda3[0] sdb3[1] > 19529656 blocks super 1.2 [2/2] [UU] > > md127 : active (auto-read-only) raid10 sdc1[2] sda1[0] sdd1[3] sdb1[1] > 39053184 blocks 64K chunks 2 near-copies [4/4] [UUUU] > > unused devices: <none> > [root@monkeybay mnt]# uname -a > Linux monkeybay 2.6.32-221.el6.x86_64 #1 SMP Tue Nov 15 14:50:38 EST 2011 > x86_64 x86_64 x86_64 GNU/Linux > [root@monkeybay mnt]# rpm -q mdadm > mdadm-3.2.2-9.el6.x86_64 |
Description of problem: Unable to convert raid-0 to raid-4: Version-Release number of selected component (if applicable): mdadm-3.2.2-1.el6_1.2.x86_64 mdadm-3.2.2-6.el6.x86_64 How reproducible: Always Steps to Reproduce: 1. Create test devices # truncate -s 100M d1 # truncate -s 100M d2 # truncate -s 100M d3 # truncate -s 100M d4 # losetup /dev/loop1 d1 # losetup /dev/loop2 d2 # losetup /dev/loop3 d3 # losetup /dev/loop4 d4 2. Create software raid-0 # mdadm -C /dev/md0 -l 0 -c 64 -e 1.1 -n 3 /dev/loop1 /dev/loop2 /dev/loop3 mdadm: array /dev/md0 started. 3. Convert md0 to raid-4: # mdadm -G /dev/md0 -l 4 mdadm: level of /dev/md0 changed to raid4 Actual results: # cat /proc/mdstat Personalities : [raid6] [raid5] [raid4] [raid0] md0 : active raid4 loop3[2] loop2[1] loop1[0] 0 blocks super 1.1 level 4, 64k chunk, algorithm 5 [4/3] [UUU_] unused devices: <none> Expected results: # cat /proc/mdstat Personalities : [raid6] [raid5] [raid4] [raid0] md0 : active raid4 loop3[2] loop2[1] loop1[0] 307008 blocks super 1.1 level 4, 64k chunk, algorithm 5 [4/3] [UUU_] unused devices: <none> Additional info: Workaround - specify device size when creating raid-0 # mdadm -C /dev/md0 -l 0 -c 64 -z 102336 -e 1.1 -n 3 /dev/loop1 /dev/loop2 /dev/loop3