Hello all I hope someone can help me with this. I have a single LPAR which is supplied a rootvg and datavg disk set from a dual VIO server configuration. I see dual path disks for all the datavg disks but only see one path for the rootvg disks.
The client LPAR has the following:
Code:
fcs0 Available C2-T1 Virtual Fibre Channel Client Adapter
fcs1 Available C3-T1 Virtual Fibre Channel Client Adapter
fcs2 Available C4-T1 Virtual Fibre Channel Client Adapter
fcs3 Available C5-T1 Virtual Fibre Channel Client Adapter
As can be seen FCS0 (fscsi0) is missing. From the VIO server which is serving this adapter you have:
Code:
$ lsdev -type adapter | grep fcs
fcs0 Available 8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)
fcs3 Available 8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)]
When I run the map command I get the following:
Code:
$ lsmap -all -npiv
Name Physloc ClntID ClntName ClntOS
------------- ---------------------------------- ------ -------------- -------
vfchost0 U8202.E4B.06605EP-V3-C3 2 LPAR AIX
Status:LOGGED_IN
FC name:fcs0 FC loc code:U78AA.001.WZSG75A-P1-C6-T1
Ports logged in:1
Flags:a<LOGGED_IN,STRIP_MERGE>
VFC client name:fcs0 VFC client DRC:U8202.E4B.06605EP-V2-C2-T1
Name Physloc ClntID ClntName ClntOS
------------- ---------------------------------- ------ -------------- -------
vfchost1 U8202.E4B.06605EP-V3-C4 2 LPAR AIX
Status:LOGGED_IN
FC name:fcs3 FC loc code:U78AA.001.WZSG75A-P1-C6-T2
Ports logged in:2
Flags:a<LOGGED_IN,STRIP_MERGE>
VFC client name:fcs1 VFC client DRC:U8202.E4B.06605EP-V2-C3-T1
This is where it gets interesting on the offending vfchost it can be seen that only 1 port is logged in, whereas on the working port 2 are logged in.
I believe this is the problem but cannot find anything on a general internet trawl to answer why! I believe it is a SAN configuration problem but need evidence with which to beat up the SAN team!
The simple answer is yes they are as follows:
The available adapters are:
Code:
lsdev -Cc adapter
ent4 Available Logical Host Ethernet Port (lp-hea)
fcs0 Available C2-T1 Virtual Fibre Channel Client Adapter
fcs1 Available C3-T1 Virtual Fibre Channel Client Adapter
fcs2 Available C4-T1 Virtual Fibre Channel Client Adapter
fcs3 Available C5-T1 Virtual Fibre Channel Client Adapter
lhea0 Available Logical Host Ethernet Adapter (l-hea)
FCS0 is from the first VIO with the partner adapter FCS2 from the second VIO
The adapter plus children are as follows:
Code:
lsdev -C | grep C2-T1
fcs0 Available C2-T1 Virtual Fibre Channel Client Adapter
fscsi0 Available C2-T1-01 FC SCSI I/O Controller Protocol Device
sfwcomm0 Available C2-T1-01-FF Fibre Channel Storage Framework Comm
The adapter from the other VIO server:
Code:
lsdev -C | grep C4-T1
fcs2 Available C4-T1 Virtual Fibre Channel Client Adapter
fscsi2 Available C4-T1-01 FC SCSI I/O Controller Protocol Device
hdisk0 Available C4-T1-01 XP MPIO Disk XP24000 (Fibre)
hdisk2 Available C4-T1-01 XP MPIO Disk XP24000 (Fibre)
sfwcomm2 Available C4-T1-01-FF Fibre Channel Storage Framework Comm
After a lot of work finding the connection infromation of the offending disks and using the
Code:
mkpath
and
Code:
chpath
command I finally convinced the SAN team that something was not behaving itself on the SAN switch.
A full reset was then run on the switch with all VIO servers and the client LPAR powered off. Once the switch reset had finished I rebooted the VIO servers and the client ran an
Code:
lspath
which showed all disks!
It appears that the
Code:
mkpath chpath
do not actually do anything on the fibre link between the HBA and the switch. I believe I will never find out why the ports dropped!
Please forgive me here as I don't fully understand what I am talking about here so if I use the wrong terminology please overlook me.
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Or, if i must move the LPAR on another server with another FCS, i have to change the zoning??
Thanks in advance.
Mario
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