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07-08-2013 07:37 AM
07-08-2013 07:37 AM
Hello,
I installed a card with 2 ports and each of these ports connect to a separate swtich.
I presented a 100GB disk to my RP3410 and i am a bit confused with the ioscan results.
Running ioscan -fnC disk shows 4 device paths:
disk 9 0/3/1/0.1.17.0.0.1.2 sdisk CLAIMED DEVICE HP HSV300
/dev/dsk/c10t1d2 /dev/rdsk/c10t1d2
disk 7 0/3/1/0.1.18.0.0.1.2 sdisk CLAIMED DEVICE HP HSV300
/dev/dsk/c5t1d2 /dev/rdsk/c5t1d2
disk 8 0/3/1/1.1.17.0.0.1.2 sdisk CLAIMED DEVICE HP HSV300
/dev/dsk/c14t1d2 /dev/rdsk/c14t1d2
disk 6 0/3/1/1.1.18.0.0.1.2 sdisk CLAIMED DEVICE HP HSV300
/dev/dsk/c12t1d2 /dev/rdsk/c12t1d2
then if i run ioscan -kfNnC disk it shows the following:
disk 10 64000/0xfa00/0x4 esdisk CLAIMED DEVICE HP HSV300
/dev/disk/disk10 /dev/rdisk/disk10
What i am trying to understand is if i have 2 ports, shouldnt it only show 2 device paths instead of 4? Is it becase each san switch can go through either of the 2 EVA controllers resulting on 2 "paths" per port? If so then, because of the built-in multipath support in 11.31, all these 4 paths get me to the same disk /dev/disk/disk10, correct?
Thanks.
Solved! Go to Solution.
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07-08-2013 08:00 AM
07-08-2013 08:00 AM
Re: FC HBA disks - ioscan questions
>>Is it becase each san switch can go through either of the 2 EVA controllers resulting on 2 "paths" per port?
Correct.
>>If so then, because of the built-in multipath support in 11.31, all these 4 paths get me to the same disk /dev/disk/disk10, correct?
You are correct.
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07-08-2013 08:50 AM
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07-08-2013 09:43 AM
07-08-2013 09:43 AM
Re: FC HBA disks - ioscan questions
This helps to visualize it a lot better.
Thanks to both of you.
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07-08-2013 11:24 AM
07-08-2013 11:24 AM
Re: FC HBA disks - ioscan questions
each EVA controller is connected to both SAN switches, so each HBA port can see both EVA controllers.
So you have 4 paths to the EVA.
# ioscan -m dsf
will show you,
# scsimgr get_info -D /dev/rdisk/disk10
and other scsimgr commands give you more details.
Hope this helps!
Regards
Torsten.
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