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Bug 1357451

Summary: pmem0 device node disappeared after reconfigure with 510 sector-size
Product: Red Hat Enterprise Linux 7 Reporter: Zhang Yi <yizhan>
Component: ndctlAssignee: Jeff Moyer <jmoyer>
Status: CLOSED ERRATA QA Contact: Zhang Yi <yizhan>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 7.3   
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2017-08-01 23:14:27 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:

Comment 2 Jeff Moyer 2016-07-18 14:26:18 UTC 
510 isn't a supported sector size.  What did you expect to happen?  Did you expect the existing device to remain intact?
Comment 3 Zhang Yi 2016-07-19 01:48:54 UTC 
(In reply to Jeffrey Moyer from comment #2)
> 510 isn't a supported sector size.  What did you expect to happen?  Did you
> expect the existing device to remain intact?

Yes, I think the existing device pmem0 should still exist although reconfigured with unsupported sector size
Comment 4 Zhang Yi 2016-08-05 03:46:45 UTC 
Reported this issue to upstream and Dan have submitted below patch:
https://lists.01.org/pipermail/linux-nvdimm/2016-August/006526.html
Comment 5 Jeff Moyer 2017-03-27 17:35:55 UTC 
Rebased to ndctl-56, package ndctl-56-1.el7.
Comment 7 Zhang Yi 2017-04-23 07:52:30 UTC 
Verified with ndctl-56-1.el7.x86_64, change to VERIFIED.

# lsblk 
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0 279.4G  0 disk 
├─sda1   8:1    0    10G  0 part /boot/efi
├─sda2   8:2    0 229.4G  0 part /boot
├─sda3   8:3    0    15G  0 part 
├─sda4   8:4    0    15G  0 part 
└─sda5   8:5    0    10G  0 part [SWAP]
sdb      8:16   0 279.4G  0 disk 
└─sdb1   8:17   0 279.4G  0 part /
sr0     11:0    1  1024M  0 rom  
pmem0  259:0    0     8G  0 disk 
pmem1s 259:1    0     8G  0 disk 
pmem2s 259:2    0     8G  0 disk 
pmem3s 259:3    0     8G  0 disk 
[root@hp-dl380gen9-01 ~]# ndctl create-namespace -f -e namespace0.0 --mode=sector -l 510
failed to reconfigure namespace: invalid argument
[root@hp-dl380gen9-01 ~]# lsblk 
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0 279.4G  0 disk 
├─sda1   8:1    0    10G  0 part /boot/efi
├─sda2   8:2    0 229.4G  0 part /boot
├─sda3   8:3    0    15G  0 part 
├─sda4   8:4    0    15G  0 part 
└─sda5   8:5    0    10G  0 part [SWAP]
sdb      8:16   0 279.4G  0 disk 
└─sdb1   8:17   0 279.4G  0 part /
sr0     11:0    1  1024M  0 rom  
pmem0  259:0    0     8G  0 disk 
pmem1s 259:1    0     8G  0 disk 
pmem2s 259:2    0     8G  0 disk 
pmem3s 259:3    0     8G  0 disk
Comment 8 errata-xmlrpc 2017-08-01 23:14:27 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://access.redhat.com/errata/RHBA-2017:2208