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тАО03-20-2012 12:49 AM
тАО03-20-2012 12:49 AM
Newbie question about P4300 and FOM
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тАО03-20-2012 02:15 AM
тАО03-20-2012 02:15 AM
Re: Newbie question about P4300 and FOM
if you really are running managers on both nodes, this should in fact never happen. But as this only affected the windows machines, maybe the configuration of the iSCSI initiator on the affected machines has something to do with it. Are you using HPs MPIO driver or the default Microsoft Initiator? I never used the HP MPIO driver, but if you did, did you add the FOM as a path to a volume?
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тАО03-20-2012 05:13 AM
тАО03-20-2012 05:13 AM
Re: Newbie question about P4300 and FOM
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тАО03-20-2012 02:31 PM
тАО03-20-2012 02:31 PM
Re: Newbie question about P4300 and FOM
Are you presenting the same lefthand volune to more than one windows system?
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тАО05-14-2012 03:34 AM
тАО05-14-2012 03:34 AM
Re: Newbie question about P4300 and FOM
Are you running the FOM on a seperate host? Best practice indicates this as a requirement. The FOM should NEVER be run off the p4000 itself for what should be obvious reasons. The FOM serves as a tie-breaker so should continue to run independantly even if the rest of the infrastructure is disabled/offline.
The FOM has very low requirements so can be run on even a VT capable laptop (if you think about it, a laptop has a battery so is not actually a bad choice)
David Tocker
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тАО05-14-2012 03:42 AM
тАО05-14-2012 03:42 AM
Re: Newbie question about P4300 and FOM
Also, keep in mind switching architecture,
You should be running seperate VLANs for the iSCSI traffic - and the ports in this VLAN should be running flow control - Jumbo frames are not necessary in most cases and are likely/possible to cause issues - especially if you are running with lower-end switches (this is probably why HP recommend the procurve 2910al switches for P4000)
If in doubt, drop the jumbo, keep the flow control.
STP can be an issue - make sure you have the equivalent of a 'portfast' command applied to each iSCSI port as you do not want to wait for STP negotiation.
I would recommend disabling STP on the ports of smaller architectures to keep it simple - if you can have dedicated switches for iSCSI even better,
I recommend using ALB vs LACP in most cases - much less issues, only a little less performace - and if your switches cannot support stacking/irf then you will really have no choice if you want redudancy. (interswitch LACP trunks is what this is all about)
David Tocker