[gpfsug-discuss] Dell Multipath

[Jan Finnerman Load]

Hi,

I realize this might not be strictly GPFS related but I’m getting a little desperate here…
I’m doing an implementation of GPFS/Spectrum Scale 4.2 at a customer and struggle on a question of disk multipathing for the intended NSD disks with their direct attached SAS disk systems.
 If I do a multipath –ll, after a few seconds I just get the prompt back. I expected to see the usual big amount of path info, but nothing there.

If I do a multipathd –k and then a show config, I see all the Dell disk luns with reasonably right parameters. I can see them as /dev/sdf, /dev/sdg, etc. devices.
I can also add them in PowerKVM:s Kimchi web interface and even deploy a GPFS installation on it. The big question is, though, how do I get multipathing to work ?
Do I need any special driver or setting in the multipath.conf file ?
I found some of that but more generic e.g. for RedHat 6, but now we are in PowerKVM country.

The platform consists of:
4x IBM S812L servers
SAS controller
  PowerKVM 3.1
Red Hat 7.1
2x Dell MD3460 SAS disk systems
No switches

Jan
///Jan

[cid:E11C3C62-0896-4FE2-9DCF-FFA5CF812B75]
Jan Finnerman
Senior Technical consultant

[CertTiv_sm]

[cid:621A25E3-E641-4D21-B2C3-0C93AB8B73B6]
Kista Science Tower
164 51 Kista
Mobil: +46 (0)70 631 66 26
Kontor: +46 (0)8 633 66 00/26
jan.finnerman at load.se<mailto:jan.finnerman at load.se>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20160425/851e8351/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: F1EE9474-7BCC-41E6-8237-D949E9DC35D3[5].png
Type: image/png
Size: 5565 bytes
Desc: F1EE9474-7BCC-41E6-8237-D949E9DC35D3[5].png
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20160425/851e8351/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: E895055E-B11B-47C3-BA29-E12D29D394FA[5].png
Type: image/png
Size: 8584 bytes
Desc: E895055E-B11B-47C3-BA29-E12D29D394FA[5].png
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20160425/851e8351/attachment-0001.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: CertPowerSystems_sm[1][5].png
Type: image/png
Size: 6664 bytes
Desc: CertPowerSystems_sm[1][5].png
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20160425/851e8351/attachment-0002.png>