I have directly connected my IBM Pseries AIX machine to SAN Storage
I have a dual port Fibre Channel Adapter
Connected both fiber ports to SAN Box IBM DS4500 Controller A & Controller B
Using IBM DS storage manager client 10 -- created one logical disk and assigned to a default group
on my AIX machine
Code:
# oslevel -s
6100-05-00-0000
# lsdev -Cc disk
hdisk8 Available 0A-08-02 MPIO Other DS4K Array Disk
hdisk9 Available 0A-08-02 MPIO Other DS4K Array Disk
# lsdev -Cc adapter
fcs0 Available 0A-08 FC Adapter
fcs1 Available 0A-09 FC Adapter
I see two disks in my AIX machine HDISK8 and HDISK9 is same disk but appearing twice . I have disconnected one cable from the controller , deleted hdisk9 and ran cfgmgr , I don't see hdisk9
Do I need to have SAN Switch inorder for it to appear only once or is there any other configuration which I am missing.... ?
Hmmm,
Looking at the output it seems both the disk are seen by fcs0, can you paste the output of
Code:
lspath -H
Check the setting on interface of your fibre adapter.
Code:
lsattr -El fscsiX, where x=0 and 1
Is dynamic tracking set to yes?
Also, I see your AIX OS version is 6.1TL05, you are at basic level of TL05, problem like yours may have been resolved in higher TL or SP levels, I recommend upgrade your OS as well.
What version of AIX are you running? Have you installed the appropriate software to merge the disks together?
We have a 5.1 system that blends together two or more hdisks with the same serial number as a vpath. We use the command lsvpcfg to display what is matched up. We then add the vpath device to the volume group.
Just a snippet:-
Code:
RBATTE1 @ /usr/home/RBATTE1>lsvpcfg
vpath1 (Avail pv db1vg02) 50715182 = hdisk688 (Avail ) hdisk906 (Avail )
vpath2 (Avail pv db1vg02) 50815182 = hdisk689 (Avail ) hdisk907 (Avail )
vpath3 (Avail pv db1vg02) 50915182 = hdisk690 (Avail ) hdisk908 (Avail )
etc.
etc.
RBATTE1 @ /usr/home/RBATTE1>lsvg -p db1vg02
db1vg02:
PV_NAME PV STATE TOTAL PPs FREE PPs FREE DISTRIBUTION
vpath1 active 521 3 00..00..00..00..03
vpath2 active 521 1 00..00..00..00..01
vpath3 active 521 1 00..00..00..00..01
vpath4 active 521 1 00..00..00..00..01
vpath5 active 521 1 00..00..00..00..01
vpath6 active 521 1 00..00..00..00..01
vpath7 active 521 1 00..00..00..00..01
If you are newer, then you would need MPIO, which I'm not familiar with, but I think that would blend multiple-path devices into hdisks, so it would seem more normal.
I would also recommend splitting your fibre connections. If you lose a path and feel that you have to replace the fibre card, then you are looking at downtime (well all SAN disks off-line anyway) to do so. If it really is for testing, then splitting would still be a good idea as you could pull a cable and see how it all reacts.
Robin
Liverpool/Blackburn
UK
Last edited by rbatte1; 08-15-2013 at 12:23 PM..
Reason: Added the snippet of output
Ok,
Have you install the ODM file set for type of storage? It's a native software of aix to detect type of disk.
I am not sure, if you company has bought MPIO software, its a licensed product (its free with v7000 storage), with DS4000 series, you better run by your manager. If yes you will install the devices.sddpcm file set for MPIO.
Set the dynamic tracking to yes and fc_err_recov to fast_fail, if your rootvg is local disk or vscsi, you can run the command without -P flag. else use -P flag and reboot the box for the changes to be affective.
I do have the MPIO drivers installed which came with the VIOS
Code:
# lsdev -Cc disk
hdisk0 Available 09-08-00-3,0 16 Bit LVD SCSI Disk Drive
hdisk1 Available 09-08-00-4,0 16 Bit LVD SCSI Disk Drive
hdisk2 Available 09-08-00-5,0 16 Bit LVD SCSI Disk Drive
hdisk3 Available 09-08-00-8,0 16 Bit LVD SCSI Disk Drive
hdisk4 Available 09-08-01-3,0 16 Bit LVD SCSI Disk Drive
hdisk5 Available 09-08-01-4,0 16 Bit LVD SCSI Disk Drive
hdisk6 Available 09-08-01-5,0 16 Bit LVD SCSI Disk Drive
hdisk7 Available 09-08-01-8,0 16 Bit LVD SCSI Disk Drive
hdisk8 Available 0A-08-02 MPIO Other DS4K Array Disk
hdisk9 Available 0A-09-02 MPIO Other DS4K Array Disk
#
# lsvpcfg
ksh: lsvpcfg: not found.
# lslpp -l | grep mpio
devices.common.IBM.mpio.rte
devices.common.IBM.mpio.rte
# lslpp -lc | grep mpio
/usr/lib/objrepos:devices.common.IBM.mpio.rte:6.1.5.0::COMMITTED:I:MPIO Disk Path Control Module :
/etc/objrepos:devices.common.IBM.mpio.rte:6.1.5.0::COMMITTED:I:MPIO Disk Path Control Module :
# manage_disk_drivers -l
Device Present Driver Driver Options
2810XIV AIX_AAPCM AIX_AAPCM,AIX_non_MPIO
DS4100 AIX_APPCM AIX_APPCM,AIX_fcparray
DS4200 AIX_APPCM AIX_APPCM,AIX_fcparray
DS4300 AIX_APPCM AIX_APPCM,AIX_fcparray
DS4500 AIX_APPCM AIX_APPCM,AIX_fcparray
DS4700 AIX_APPCM AIX_APPCM,AIX_fcparray
DS4800 AIX_APPCM AIX_APPCM,AIX_fcparray
DS3950 AIX_APPCM AIX_APPCM
DS5020 AIX_APPCM AIX_APPCM
DS5100 AIX_APPCM AIX_APPCM
DS3500 AIX_APPCM AIX_APPCM
# mpio_get_config -Av
Frame id 0:
Storage Subsystem worldwide name: 60ab80016a13700005127aff6
Controller count: 2
Partition count: 2
Partition 0:
Storage Subsystem Name = ''
hdisk LUN # Ownership User Label
hdisk8 4 A (preferred) testdrive
Partition 1:
hdisk LUN # Ownership User Label
hdisk9 4 B (non-preferred) testdrive
# lsattr -El hdisk8 | grep fail
algorithm fail_over Algorithm True
# lsattr -El hdisk8 | grep reserve_policy
reserve_policy single_path Reserve Policy True
dac0 Available 0A-08-02 DS3/4K PCM User Interface
dac1 Available 0A-09-02 DS3/4K PCM User Interface
hdisk0 Available 09-08-00-3,0 16 Bit LVD SCSI Disk Drive
hdisk1 Available 09-08-00-4,0 16 Bit LVD SCSI Disk Drive
hdisk2 Available 09-08-00-5,0 16 Bit LVD SCSI Disk Drive
hdisk3 Available 09-08-00-8,0 16 Bit LVD SCSI Disk Drive
hdisk4 Available 09-08-01-3,0 16 Bit LVD SCSI Disk Drive
hdisk5 Available 09-08-01-4,0 16 Bit LVD SCSI Disk Drive
hdisk6 Available 09-08-01-5,0 16 Bit LVD SCSI Disk Drive
hdisk7 Available 09-08-01-8,0 16 Bit LVD SCSI Disk Drive
hdisk8 Available 0A-08-02 MPIO Other DS4K Array Disk
hdisk9 Available 0A-09-02 MPIO Other DS4K Array Disk
As I explained earlier
Fiber Port 0 is connected to SAN Controller A
Fiber Port 1 is connected to SAN Controller B There is no SAN Switch in between and it is direct connection
If both Fiber ports are connected to both controllers then I see duplicated disks.
Do I need to download drivers for IBM FastT 1722 - 60U and it should be appear as 1722-600 (600) Disk Array Device ?
or something else need to be done...
Appreciate your help and feedback...
Last edited by filosophizer; 08-15-2013 at 01:39 PM..
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