[gpfsug-discuss] NSD V2 vs V1 - how can you tell?

[Glen Corneau]

Just a note for my AIX folks out there (and I know there's at least one!):

When NSDv2 (version 1403) disks are defined in AIX we *don't* create GPTs 
on those LUNs.

However with GPFS (Spectrum Scale) installed on AIX we will place the NSD 
name in the "VG" column of lsvg.

But yes, we've had situations of customers creating new VGs on existing 
GPFS LUNs (force!) and destroying file systems.
------------------
Glen Corneau
Power Systems
Washington Systems Center
gcorneau at us.ibm.com





From:   "Felipe Knop" <knop at us.ibm.com>
To:     gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Date:   07/28/2017 07:45 AM
Subject:        Re: [gpfsug-discuss] NSD V2 vs V1 - how can you tell?
Sent by:        gpfsug-discuss-bounces at spectrumscale.org



Bob,

I believe the NSD format version (v1 vs v2) is shown in the " format 
version" line that starts with "NSDid" :


# mmfsadm test readdescraw /dev/dm-11
NSD descriptor in sector 64 of /dev/dm-11
    NSDid: 9461C0A85788693A  format version: 1403 Label:

It should say "1403" when the format is v2.


  Felipe

----
Felipe Knop                                     knop at us.ibm.com
GPFS Development and Security
IBM Systems
IBM Building 008
2455 South Rd, Poughkeepsie, NY 12601
(845) 433-9314  T/L 293-9314





From:        "Oesterlin, Robert" <Robert.Oesterlin at nuance.com>
To:        gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Date:        07/28/2017 07:47 AM
Subject:        Re: [gpfsug-discuss] NSD V2 vs V1 - how can you tell?
Sent by:        gpfsug-discuss-bounces at spectrumscale.org



Hi Scott
 
This refers to the file system format which is independent of the NSD 
version number. File systems can be upgraded but all the NSDs are still at 
V1. For instance, here is an NSD I know is still V1:
 
[root at gpfs2-gpfs01 ~]# grep msa0319VOL2 volmaps
msa0319VOL2   mpathel   (3600c0ff0001497e259ebac5001000000) dm-19     14T 
sdad  0[active][ready] sdft  1[active][ready] sdam  2[active][ready] sdgc 
3[active][ready]
[root at gpfs2-gpfs01 ~]# mmfsadm test readdescraw /dev/dm-19 | grep " 
original format"
    original format version 1001, cur version 1600 (mgr 1600, helper 1600, 
mnode 1600)
 
The file system version is current however.
 
Bob Oesterlin
Sr Principal Storage Engineer, Nuance 




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