MD3600f multipathing on Alma Linux 8.7?

Question

Hey all -

So, I've taken a look at the Dell MD32xx and MD36xx Administrator's Guide as well as the Deployment Guide to install the "HostOnly" version of the Dell MDSS software on my server, but now, having done so, I do not appear to have the commands that the guides SAY I should have (such as the multipath or rescan_dm_devs commands), on my server. What gives? Are they not in my $PATH? Do I need to know what directory they're installed in?

I checked the install logs of the software, and they say that everything worked correctly.

DELL-Joey C · Answer

Hi @Master-None,

As for multipath command, probably you might need to install the device mapper, hence try yum install device-mapper-multipath. Then try to check if the command is available.

As for rescan_dm_devs, there might be a bug or the command have been removed. I might need to check with engineering about it.

Master-None · Answer

Well, that certainly got me the multipath command, and now I see some multipathed devices when I do an fdisk -l. That said, follow-up questions:Is there any guidance on what should be in my multipath.conf file for these arrays specifically?If I were to run a SECOND cable to the switch, will multipath understand that, and add THOSE paths to that /dev/mapper/mpathX device that now shows up under fdisk -l?

DELL-Charles R · Answer

Hello Master-None,

This Article Number: 000124601 should help.

It also has multipath.conf.

ME: / MD Series: Combined Linux MPIO multipath.conf

https://dell.to/3O1rchD

For the second question: If you are using mpath device details to access the volume, that is what should happen.

https://dell.to/42D9cyE

PowerVault

MD3600f multipathing on Alma Linux 8.7?

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