polyfuze0411
2 Bronze

Solaris Powerpath Configuration

Jump to solution
Hi Guys,

Need to ask a couple of questions
AVAILABLE DISK SELECTIONS:
0. c0t0d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@0,0
1. c0t1d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@1,0
2. c1t5006016841E01644d0 <DGC-RAID5-0322 cyl 51198 alt 2 hd 256 sec 16>
/pci@1,700000/SUNW,qlc@0/fp@0,0/ssd@w5006016841e01644,0
3. c3t5006016141E01644d0 <drive type unknown>
/pci@3,700000/SUNW,qlc@0/fp@0,0/ssd@w5006016141e01644,0
4. c3t5006016941E01644d0 <drive type unknown>
/pci@3,700000/SUNW,qlc@0/fp@0,0/ssd@w5006016941e01644,0
5. emcpower0a <DGC-RAID5-0322 cyl 51198 alt 2 hd 256 sec 16>
/pseudo/emcp@0
Specify disk (enter its number)[3]: ^D

a) From input above, how do i know powerpath is working?
b) Does it mean that disk 2,3 and 4 is actually the same LUN assigned to this server?
c) What is the function of disk 5?
Labels (1)
Tags (2)
0 Kudos
1 Solution

Accepted Solutions
Conor1
2 Iron

Re: Solaris Powerpath Configuration

Jump to solution
Before PowerPath can see more than one path, the OS will have to see more than one path.
As others have suggested previously,
- Check your zoning
- Check "Connectivity status" in Navisphere manager and ensure that all HBA's are logged-in and registered on the relevant SP's,
- Add/Remove host from the storage group
- Reconfig reboot the host

run the following PowerPath commands when the host comes back up

powercf -q
powermt config
powermt set policy=co dev=all
powermt save
powermt display
0 Kudos
18 Replies
Highlighted
Conor1
2 Iron

Re: Solaris Powerpath Configuration

Jump to solution
Hi Polyfuse,

this looks like three paths to the same LUN on the CLARiiON, see below for how the paths map to the CLARiiON SP's:

2. c1t5006016841E01644d0 <DGC-RAID5-0322 cyl 51198 alt 2 hd 256 sec 16>
- -> Storage Processor B port 0.
3. c3t5006016141E01644d0 <drive type unknown>
- -> Storage Processor A port 1
4. c3t5006016941E01644d0 <drive type unknown>
- -> Storage Processor B port 1

5. emcpower0a <DGC-RAID5-0322 cyl 51198 alt 2 hd 256 sec 16>
/pseudo/emcp@0

Disk 5 is the PowerPath pseudo device, you should point all of your applications that wish to access this device to the pseudo device. PowerPath will then take care of the routing of the IO (no matter if a HBA goes down or a SP port goes down the IO will still succeed through one of the other paths)

For a clearer picture of the PowerPath configuration, please post up the output from: powermt display dev=all

this will give you the status of all the paths to that LUN, the LUN details, the LUN WWN, the CLARiiON serial number, the current owning SP etc.

Let me know if you have any further questions.

Conor
polyfuze0411
2 Bronze

Re: Solaris Powerpath Configuration

Jump to solution
Hi,

a) An idea on why are there only 3 paths since 4 fibre ports are added?
b) There's a red F icon on my SP, what does red F means?
c) is there a way to check the uptime of the storage?

Thanks
0 Kudos
Conor1
2 Iron

Re: Solaris Powerpath Configuration

Jump to solution
a) You will need to check to see if you have a HBA logged-in and registered to SPA0.

In Navi Manager, Right click on the array and chose 'Connectivity Status' here you will see a list of HBAs logging into your array. Please make sure there are 4 paths showing here for your Solaris host. If not check the fabric zoning.

b) A Fatal Event icon (red letter "F" in a circle) is displayed. This indicates a fatal hardware event on the array. Please open a case with support. (This may be relating to why you cannot see the 4th path)

c) I'm not too sure what the command is to check uptime. It may be worth asking in the CLARiiON forum... http://forums.emc.com/forums/category.jspa?categoryID=31

Conor
AmolMahajan
2 Iron

Re: Solaris Powerpath Configuration

Jump to solution
Hi,

double Check your zone for SPA0. make sure hba is going to correct SPA0 port.
0 Kudos
polyfuze0411
2 Bronze

Re: Solaris Powerpath Configuration

Jump to solution
1) If I were to have 2 hba single ports cards connected to two SAN switch, how many devices can be seen by typing "format" on Solaris? How many paths can be seen if i use dual port card?
2) How would the configuration look like if there is no PowerPath? If the configuration is same, what is seen on Solaris by typing "format"?

3) Which comes first? Install PowerPath or define configuration in navisphere manager?
0 Kudos
AmolMahajan
2 Iron

Re: Solaris Powerpath Configuration

Jump to solution
1) If I were to have 2 hba single ports cards connected to two SAN switch, how many devices can be seen by typing "format" on Solaris? How many paths can be seen if i use dual port card?

It depends on number of zones you are making for each HBA. Dual card has different wwns for each port, and at the switch level it looks like two seperate HBAs.

2) How would the configuration look like if there is no PowerPath?

#format
0. c1t0d0
/pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@0,0
1. c1t1d0
/pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@1,0


3) Which comes first? Install PowerPath or define configuration in navisphere manager?
It realy depends on your choice, both way is fine.
I would go install the PP first and then have storage side(navi) work later ;-)
Remember, Having powerpath and no powerpath has different setting on navisphere :-)
0 Kudos
polyfuze0411
2 Bronze

Re: Solaris Powerpath Configuration

Jump to solution
Hi,

Is it possible for me to use cx3-20 connected to solaris server without installing powerpath? Would it be possible to use any of the LUNs presented without installing any Multipath software whether Powerpath or SUN DMP?

The reason i'm asking this is because i'm seeing this error from Solaris :

This is the error on the non-PowerPath devices.

root@KAIPSCPT04 # format

Searching for disks...Nov 11 19:41:23 KAIPSCPT04 scsi: WARNING: /pci@3,700000/SUNW,qlc@0/fp@0,0/ssd@w5006016941e01644,0 (ssd0):

Nov 11 19:41:23 KAIPSCPT04 offline or reservation conflict

Nov 11 19:41:23 KAIPSCPT04 scsi: WARNING: /pci@3,700000/SUNW,qlc@0/fp@0,0/ssd@w5006016941e01644,0 (ssd0):

Nov 11 19:41:23 KAIPSCPT04 offline or reservation conflict

Nov 11 19:41:23 KAIPSCPT04 scsi: WARNING: /pci@3,700000/SUNW,qlc@0/fp@0,0/ssd@w5006016141e01644,0 (ssd1):

Nov 11 19:41:23 KAIPSCPT04 offline or reservation conflict

Nov 11 19:41:23 KAIPSCPT04 scsi: WARNING: /pci@3,700000/SUNW,qlc@0/fp@0,0/ssd@w5006016141e01644,0 (ssd1):

Nov 11 19:41:23 KAIPSCPT04 offline or reservation conflict

Nov 11 19:41:23 KAIPSCPT04 scsi: WARNING: /pci@1,700000/SUNW,qlc@0/fp@0,0/ssd@w5006016841e01644,0 (ssd2):

Nov 11 19:41:23 KAIPSCPT04 offline or reservation conflict


They cant be labelled as well.
Another message.



Nov 18 14:24:39 KAIPSCPT04 genunix: [ID 901765 kern.warning] WARNING: Page83 data not standards compliant DGC LUNZ 0322


Thanks
0 Kudos
AmolMahajan
2 Iron

Re: Solaris Powerpath Configuration

Jump to solution
Is it possible for me to use cx3-20 connected to solaris server without installing powerpath?

Yes, but while registering the host to cx-3-30 you need to select failover mode "0".
Would it be possible to use any of the LUNs presented without installing any Multipath software whether Powerpath or SUN DMP?
yes.

for those errors, have a look here :-)

emc123323
0 Kudos
polyfuze0411
2 Bronze

Re: Solaris Powerpath Configuration

Jump to solution
Hi,

The above issue has been settled by EMC. However i'm facing another problem, i have one sun v240 connected to the same cx3-20f mentioned above. I've downloaded Powerpath for solaris package from powerlink.

I'd install Powerpath without license as i didn't receive the license on time.When i received the license keys 2 weeks ago, I've entered the key but when i run emcpreg -check key command there's an error message stating Key key is invalid and when i run powermt display dev=all command.

This is the output :

KAIPSCPT03:/> powermt display dev=all
Pseudo name=emcpower0a
CLARiiON ID=CK200063200677 [KAIPSCPT03]
Logical device ID=600601607DD01900D41330CFE7ABDD11 [LUN 43]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0
Owner: default=SP B, current=SP B Array failover mode: 1
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
3072 pci@1,700000/SUNW,qlc@0/fp@0,0 c1t5006016841E01644d0s0 SP B0 active alive 0 0


Any ideas why the policy is set at BasicFailover and there's only one path?


Thanks
0 Kudos