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тАО11-11-2009 08:35 AM
тАО11-11-2009 08:35 AM
device to array mapping
I have a bunch luns coming from two different EVAs. I am having hard time in identifying which device is from which array. Could somebody give some idea?
I know the WWN of both the arrays. Attaching IOSCAN and fcmsutil output
Thanks
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тАО11-11-2009 09:08 AM
тАО11-11-2009 09:08 AM
Re: device to array mapping
11.31 only.
ioscan -m hwpath
ioscan -m dsf
The first command includes hardware path and WWN. That should help you sort it out.
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тАО11-11-2009 09:15 AM
тАО11-11-2009 09:15 AM
Re: device to array mapping
Since you are on 11.31
ioscan -P wwid -Cdisk will list all the world wide names and
ioscan -m dsf will list the old to new name mappings.
Please see man ioscan for details and
also have a read of man lvm and man 7 intro which explain how the disk names are used.
I hope this helps
mike
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тАО11-11-2009 09:36 AM
тАО11-11-2009 09:36 AM
Re: device to array mapping
**** I have a bunch luns coming from two different EVAs. *********
you have two FC cards at path 0/3/1/0 and 0/7/1/0. so simply you can know that the LUNs coming from 0/3/1/0 are coming from 1st array and from 0/7/1/0 are coming from 2nd array. Because one FC is connected to one array only.
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тАО11-11-2009 10:36 AM
тАО11-11-2009 10:36 AM
Re: device to array mapping
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тАО11-11-2009 10:50 AM
тАО11-11-2009 10:50 AM
Re: device to array mapping
Normally both arrays are zoned to both the HBAs. Otherwise how do we get redundancy?
Thanks
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тАО11-11-2009 10:56 AM
тАО11-11-2009 10:56 AM
Re: device to array mapping
# evainfo
usage: evainfo [-a|-d
]
-a : Display information for all EVA Luns presented to this host.
-d : Display information for the specified EVA Lun.
-l : Display information in long/full format.
-v : Display EVAInfo tool version details.
-f : Specify output format. The supported values for
tab (default)
csv
-u : Specify output format for Capacity {KB|MB|GB}, default is MB.
-W : Collate output based on WWN of Luns.
-w : Display information for the specified Lun WWN.
-g : Use SCSI generic (sg) interface on Linux.
-h : Help
Hope this helps!
Regards
Torsten.
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тАО11-11-2009 11:28 AM
тАО11-11-2009 11:28 AM
Re: device to array mapping
your HW address will indicate what eva by which port it is connected to on the switch.
e.g.
0/2/1/0.10.0.0.0.1 EVA plugged into port 0
or
0/7/1/0.20.16.0.0.1 EVA plugged into port 16
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тАО11-11-2009 11:40 AM
тАО11-11-2009 11:40 AM
Re: device to array mapping
Thanks to other also who suggested new 11.31 commands. I used below commands to make a correlation.
-) ioscan -m lun /dev/rdisk/disk###
-) ioscan -m dsf /dev/rdisk/disk###
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тАО11-11-2009 12:04 PM
тАО11-11-2009 12:04 PM
Re: device to array mapping
Map the switch port # from the hardware path to the port where the array is connected. So, if you know which array is connected to the specific port, then we know the device corresponding to that hardware path belongs to that array.
for e.g: 12 is the switch port where one of the EVA port is connected and I know which array is plugged on to FC switch port 12.
disk 129 0/7/1/0.39.12.0.0.0.7 sdisk
Method 2) Run below commands and make a correlation if you know EVA controller WWW port numbers.
-) ioscan -m lun /dev/rdisk/disk###
-) ioscan -m dsf /dev/rdisk/disk###
Thanks