Bug 1370658

Summary:	raid10 stripe limitation is 32, not 64 like the current error states
Product:	Red Hat Enterprise Linux 7	Reporter:	Corey Marthaler <cmarthal>
Component:	lvm2	Assignee:	LVM and device-mapper development team <lvm-team>
lvm2 sub component:	Mirroring and RAID	QA Contact:	cluster-qe <cluster-qe>
Status:	CLOSED ERRATA	Docs Contact:
Severity:	low
Priority:	unspecified	CC:	agk, heinzm, jbrassow, lmiksik, msnitzer, prajnoha, prockai, zkabelac
Version:	7.3
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	lvm2-2.02.164-4.el7	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-11-04 04:18:22 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Corey Marthaler 2016-08-26 23:14:59 UTC

Description of problem:
[root@host-117 ~]# lvcreate -i 64 --type raid10 -L 100M -n raid6 test
  Using default stripesize 64.00 KiB.
  Only up to 64 stripes in raid10 supported currently.
  Run `lvcreate --help' for more information.

[root@host-117 ~]# lvcreate -i 63 --type raid10 -L 100M -n raid6 test
  Using default stripesize 64.00 KiB.
  Only up to 64 stripes in raid10 supported currently.
  Run `lvcreate --help' for more information.

[root@host-117 ~]# lvcreate -i 33 --type raid10 -L 100M -n raid6 test
  Using default stripesize 64.00 KiB.
  Only up to 64 stripes in raid10 supported currently.
  Run `lvcreate --help' for more information.

[root@host-117 ~]# lvcreate -i 32 --type raid10 -L 100M -n raid6 test
  Using default stripesize 64.00 KiB.
  Rounding size 100.00 MiB (25 extents) up to stripe boundary size 128.00 MiB (32 extents).
  Number of stripes (32) must not exceed number of physical volumes (7)


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 2016-08-30 11:06:15 UTC

Number halved.

https://git.fedorahosted.org/cgit/lvm2.git/commit/?id=be85c22f6591435f27380e944f4770612b3b6d3c

https://www.redhat.com/archives/lvm-devel/2016-August/msg00129.html

Comment 4 Corey Marthaler 2016-08-31 17:50:33 UTC

Fix verified in the latest rpms.


3.10.0-497.el7.x86_64
lvm2-2.02.164-4.el7    BUILT: Wed Aug 31 08:47:09 CDT 2016
lvm2-libs-2.02.164-4.el7    BUILT: Wed Aug 31 08:47:09 CDT 2016
lvm2-cluster-2.02.164-4.el7    BUILT: Wed Aug 31 08:47:09 CDT 2016
device-mapper-1.02.133-4.el7    BUILT: Wed Aug 31 08:47:09 CDT 2016
device-mapper-libs-1.02.133-4.el7    BUILT: Wed Aug 31 08:47:09 CDT 2016
device-mapper-event-1.02.133-4.el7    BUILT: Wed Aug 31 08:47:09 CDT 2016
device-mapper-event-libs-1.02.133-4.el7    BUILT: Wed Aug 31 08:47:09 CDT 2016
device-mapper-persistent-data-0.6.3-1.el7    BUILT: Fri Jul 22 05:29:13 CDT 2016


[root@host-117 ~]# lvcreate -i 64 --type raid10 -L 100M -n raid6 test
  Using default stripesize 64.00 KiB.
  Only up to 32 stripes in raid10 supported currently.
  Run `lvcreate --help' for more information.

[root@host-117 ~]# lvcreate -i 33 --type raid10 -L 100M -n raid6 test
  Using default stripesize 64.00 KiB.
  Only up to 32 stripes in raid10 supported currently.
  Run `lvcreate --help' for more information.

[root@host-117 ~]# lvcreate -i 32 --type raid10 -L 100M -n raid6 test
  Using default stripesize 64.00 KiB.
  Rounding size 100.00 MiB (25 extents) up to stripe boundary size 128.00 MiB (32 extents).
  Number of stripes (32) must not exceed number of physical volumes (7)

Comment 6 errata-xmlrpc 2016-11-04 04:18:22 UTC

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-2016-1445.html