[gpfsug-discuss] mmcrfs issue

[Buterbaugh, Kevin L]

Hi All,

We are testing out some flash storage.  I created a couple of NSDs successfully (?):

root at nec:~/gpfs# mmlsnsd -F

 File system   Disk name    NSD servers
---------------------------------------------------------------------------
 (free disk)   nsd1         nec
 (free disk)   nsd2         nec

root at nec:~/gpfs#

So I tried to create a filesystem:

root at nec:~/gpfs# mmcrfs gpfs0 -F ~/gpfs/flash.stanza -A yes -B 1M -j scatter -k all -m 1 -M 3 -Q no -r 1 -R 3 -T /gpfs0
GPFS: 6027-441 Unable to open disk 'nsd2' on node nec.
GPFS: 6027-441 Unable to open disk 'nsd1' on node nec.
No such device
No such device
GPFS: 6027-538 Error accessing disks.
mmcrfs: 6027-1200 tscrfs failed.  Cannot create gpfs0
mmcrfs: 6027-1639 Command failed. Examine previous error messages to determine cause.
root at nec:~/gpfs#

Does this output from readdescraw look normal?

root at nec:~/gpfs# mmfsadm test readdescraw /dev/zd16
NSD descriptor in sector 64 of /dev/zd16
    NSDid: 0A0023D258C1C02C  format version: 1403 Label:
    Paxos sector: -1931478434 number of sectors: 8192 isPdisk: 0
    Comment: NSD descriptor for <unknown> Thu Mar  9 14:50:52 2017
No Disk descriptor in sector 96 of /dev/zd16
No FS descriptor in sector 2048 of /dev/zd16
root at nec:~/gpfs# mmfsadm test readdescraw /dev/zd32
NSD descriptor in sector 64 of /dev/zd32
    NSDid: 0A0023D258C1C02B  format version: 1403 Label:
    Paxos sector: -1880562609 number of sectors: 8192 isPdisk: 0
    Comment: NSD descriptor for <unknown> Thu Mar  9 14:50:51 2017
No Disk descriptor in sector 96 of /dev/zd32
No FS descriptor in sector 2048 of /dev/zd32
root at nec:~/gpfs#

Thanks in advance, all…

Kevin
—
Kevin Buterbaugh - Senior System Administrator
Vanderbilt University - Advanced Computing Center for Research and Education
Kevin.Buterbaugh at vanderbilt.edu<mailto:Kevin.Buterbaugh at vanderbilt.edu> - (615)875-9633



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