Bug 1370659

Summary: [RFE] add "Number of stripes (10) must not exceed number of physical volumes (7)" equivalent for mirror images
Product: Red Hat Enterprise Linux 7 Reporter: Corey Marthaler <cmarthal>
Component: lvm2Assignee: Heinz Mauelshagen <heinzm>
lvm2 sub component: Mirroring and RAID QA Contact: cluster-qe <cluster-qe>
Status: CLOSED WONTFIX Docs Contact:
Severity: low    
Priority: unspecified CC: agk, heinzm, jbrassow, msnitzer, prajnoha, zkabelac
Version: 7.3Keywords: FutureFeature
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
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Fixed In Version: Doc Type: If docs needed, set a value
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Clone Of: Environment:
Last Closed: 2020-02-28 21:10:41 UTC Type: Bug
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Corey Marthaler 2016-08-26 23:35:37 UTC 
Description of problem:

# A striped raid
[root@host-117 ~]# lvcreate -i 10 --type raid4 -L 100M -n raid4 test 
  Using default stripesize 64.00 KiB.
  Rounding size 100.00 MiB (25 extents) up to stripe boundary size 120.00 MiB (30 extents).
  Number of stripes (10) must not exceed number of physical volumes (7)


# mirrored raid
[root@host-117 ~]# lvcreate -m 0 --type raid1 -L 100M -n raid1 test                                                                                                                                                      
  --mirrors must be at least 1 with segment type raid1.                                                                                                                                                                  
  Run `lvcreate --help' for more information.                                                                                                                                                                            
[root@host-117 ~]# lvcreate -m 11 --type raid1 -L 100M -n raid test                                                                                                                                                                           
  Only up to 10 mirrors in raid1 supported currently.                                                                                                                                                                                         
  Run `lvcreate --help' for more information.                                                                                                                                                                                                 
[root@host-117 ~]# lvcreate -m 11 --type raid1 -L 100M -n raid1 test                                                                                                                                                                                            
  Only up to 10 mirrors in raid1 supported currently.                                                                                                                                                                                                           
  Run `lvcreate --help' for more information.                                                                                                                                                                                                                   
[root@host-117 ~]# lvcreate -m 10 --type raid1 -L 100M -n raid1 test                                                                                                                                                                                                          
  Only up to 10 mirrors in raid1 supported currently.                                                                                                                                                                                                                         
  Run `lvcreate --help' for more information.                                                                                                                                                                                                                                 
[root@host-117 ~]# lvcreate -m 9 --type raid1 -L 100M -n raid1 test                                                                                                                                                                                                           
  Insufficient suitable allocatable extents for logical volume raid1: 260 more required
[root@host-117 ~]# lvcreate -m 8 --type raid1 -L 100M -n raid1 test 
  Insufficient suitable allocatable extents for logical volume raid1: 234 more required
[root@host-117 ~]# lvcreate -m 7 --type raid1 -L 100M -n raid1 test 
  Insufficient suitable allocatable extents for logical volume raid1: 208 more required
[root@host-117 ~]# lvcreate -m 6 --type raid1 -L 100M -n raid1 test 
  Logical volume "raid1" created.


[root@host-117 ~]# lvcreate -m 0 --type mirror -L 100M -n mirror test 
  --mirrors must be at least 1 with segment type mirror.
  Run `lvcreate --help' for more information.
[root@host-117 ~]# lvcreate -m 11 --type mirror -L 100M -n mirror test 
  Only up to 8 mirrors in mirror supported currently.
  Run `lvcreate --help' for more information.
[root@host-117 ~]# lvcreate -m 10 --type mirror -L 100M -n mirror test 
  Only up to 8 mirrors in mirror supported currently.
  Run `lvcreate --help' for more information.
[root@host-117 ~]# lvcreate -m 9 --type mirror -L 100M -n mirror test 
  Only up to 8 mirrors in mirror supported currently.
  Run `lvcreate --help' for more information.
[root@host-117 ~]# lvcreate -m 8 --type mirror -L 100M -n mirror test 
  Only up to 8 mirrors in mirror supported currently.
  Run `lvcreate --help' for more information.
[root@host-117 ~]# lvcreate -m 7 --type mirror -L 100M -n mirror test 
  Insufficient suitable allocatable extents for logical volume mirror: 200 more required
[root@host-117 ~]# lvcreate -m 6 --type mirror -L 100M -n mirror test 
  Logical volume "mirror" created.



[root@host-117 ~]# lvs -a -o +devices
  LV                VG   Attr       LSize    Log           Cpy%Sync Devices
  mirror            test mwi-a-m--- 100.00m  [mirror_mlog] 100.00   mirror_mimage_0(0),mirror_mimage_1(0),mirror_mimage_2(0),mirror_mimage_3(0),mirror_mimage_4(0),mirror_mimage_5(0),mirror_mimage_6(0)
  [mirror_mimage_0] test iwi-aom--- 100.00m                         /dev/sda1(26)
  [mirror_mimage_1] test iwi-aom--- 100.00m                         /dev/sdb1(26)
  [mirror_mimage_2] test iwi-aom--- 100.00m                         /dev/sdc1(26)
  [mirror_mimage_3] test iwi-aom--- 100.00m                         /dev/sdd1(26)
  [mirror_mimage_4] test iwi-aom--- 100.00m                         /dev/sde1(26)
  [mirror_mimage_5] test iwi-aom--- 100.00m                         /dev/sdf1(26)
  [mirror_mimage_6] test iwi-aom--- 100.00m                         /dev/sdg1(26)
  [mirror_mlog]     test lwi-aom---   4.00m                         /dev/sdg1(51)
  raid1             test rwi-a-r--- 100.00m                100.00   raid1_rimage_0(0),raid1_rimage_1(0),raid1_rimage_2(0),raid1_rimage_3(0),raid1_rimage_4(0),raid1_rimage_5(0),raid1_rimage_6(0)       
  [raid1_rimage_0]  test iwi-aor--- 100.00m                         /dev/sda1(1)
  [raid1_rimage_1]  test iwi-aor--- 100.00m                         /dev/sdb1(1)
  [raid1_rimage_2]  test iwi-aor--- 100.00m                         /dev/sdc1(1)
  [raid1_rimage_3]  test iwi-aor--- 100.00m                         /dev/sdd1(1)
  [raid1_rimage_4]  test iwi-aor--- 100.00m                         /dev/sde1(1)
  [raid1_rimage_5]  test iwi-aor--- 100.00m                         /dev/sdf1(1)
  [raid1_rimage_6]  test iwi-aor--- 100.00m                         /dev/sdg1(1)
  [raid1_rmeta_0]   test ewi-aor---   4.00m                         /dev/sda1(0)
  [raid1_rmeta_1]   test ewi-aor---   4.00m                         /dev/sdb1(0)
  [raid1_rmeta_2]   test ewi-aor---   4.00m                         /dev/sdc1(0)
  [raid1_rmeta_3]   test ewi-aor---   4.00m                         /dev/sdd1(0)
  [raid1_rmeta_4]   test ewi-aor---   4.00m                         /dev/sde1(0)
  [raid1_rmeta_5]   test ewi-aor---   4.00m                         /dev/sdf1(0)
  [raid1_rmeta_6]   test ewi-aor---   4.00m                         /dev/sdg1(0)


Version-Release number of selected component (if applicable):
lvm2-2.02.164-3.el7    BUILT: Wed Aug 24 05:20:41 CDT 2016
lvm2-libs-2.02.164-3.el7    BUILT: Wed Aug 24 05:20:41 CDT 2016
lvm2-cluster-2.02.164-3.el7    BUILT: Wed Aug 24 05:20:41 CDT 2016
Comment 2 Alasdair Kergon 2016-10-06 18:25:18 UTC 
So I think this is just about considering whether the messages produced can be improved or not.
Comment 3 Jonathan Earl Brassow 2017-07-27 21:56:20 UTC 
(In reply to Alasdair Kergon from comment #2)
> So I think this is just about considering whether the messages produced can
> be improved or not.

yeah, might want to get back with reporter and ask specifically what they are looking for.  Probably a few things that I can see that could use a touch-up.  Low prio though.