Mount ISCSI storage share without LUN

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Greetings,

 

I'm trying to add our Dell PS5000 iSCSI SAN and having issues. I can succesfully discover and login to the target, however it appears that the Dell SAN does not specify LUN's in a way that rhev reads them. Our current setup is using a 600GB volume with LV's. I haven't been able to find a way to add this SAN to RHEV-M as it is telling me to select a LUN (non-existant)

 

Any help appreciated

 

Thanks!

td
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Responses

Sadique Puthen's picture Red Hat Guru 4679 points
6 January 2012 5:39 AM

I don't have knowledge about this specific SAN. You can check the below points.

 

1 - Check the output of multipath -ll on the host and see whether it lists the SAN luns or not. If no, please run the below commands and see whether that lists or not.

 

 

/sbin/iscsiadm -m discoverydb -t sendtargets -p ip <of target>:3260 --discover
/sbin/iscsiadm -m node -T <iqn from earlier command> -l -p <ip of target>:3260

Then check multipath -ll output and see whether you can see the lun.

 

2 - SAN lun must be empty to add to the RHEV-M. You can do "dd" to wipe out the first 512 bytes of the lun if you think it's not empty.

DY Guru 5340 points
6 January 2012 10:37 AM

If what you mean is that you have one large LUN, formatted as a PV, on which you distribute LVs to different systems, then this is not supported by RHEV - as Sadique said, RHEV requires a blank, unformatted LUN, which it will format in it's own way (actually LVM as well)

td Active Contributor 200 points
9 January 2012 10:24 PM

Thanks for the replies, I guess I had assumed that RHEV would pickup the PV and see the already created LV's

 

Working now :)

Humble Devassy Chirammal's picture Red Hat Pro 542 points
12 January 2012 7:54 AM

Tylar, one more thing to notice here is that, the lun should > 10G for RHEV to pick it up..