how to verify emc storge is shared by two nodes

[Hanry Zhou]

I'm gonig to setup 2 nodes SG, before I install SG software, the EMC storage is assigned and also cofigured as shared storage by these 2 nodes.

How do I verify that the storage is REALLY configured as what we expected, which is shared by these two nodes?

[G. Vrijhoeven]

Hi Hanry,

Do you see devices when you perform an ioscan -fnCdisk


HTH,

Gideon

[Geoff Wild · Accepted solution]

With syminq you can see that the disks are the same on both nodes:

/usr/symcli/bin/syminq

Device Product Device
---------------------- --------- --------------------- -------------------
Name Type Vendor ID Rev Ser Num Cap (KB)
---------------------- --------- --------------------- -------------------

/dev/rdsk/c0t6d0 HP 36.4G MAS3367NC HPC3 KT031272 35566480
/dev/rdsk/c3t6d0 HP 36.4G ST336752LC HP02 3ET0FQNS 35566480
/dev/rdsk/c28t5d0 HP 36.4G ST336752LC HP03 3ET0QLRR 35566480
/dev/rdsk/c28t6d0 HP 36.4G ST336752LC HP03 3ET0RJYH 35566480
/dev/rdsk/c56t0d0 EMC SYMMETRIX 5670 65000000 11520
/dev/rdsk/c56t0d1 M(4) EMC SYMMETRIX 5670 65003000 8920320
/dev/rdsk/c56t0d2 M(4) EMC SYMMETRIX 5670 65007000 8920320
/dev/rdsk/c56t0d3 M(4) EMC SYMMETRIX 5670 6500B000 8920320
/dev/rdsk/c56t0d4 M(4) EMC SYMMETRIX 5670 65063000 35354880
/dev/rdsk/c56t0d5 M(4) EMC SYMMETRIX 5670 65067000 35354880
/dev/rdsk/c56t0d6 M(4) EMC SYMMETRIX 5670 6506B000 35354880
/dev/rdsk/c56t0d7 M(4) EMC SYMMETRIX 5670 6506F000 35354880
....more

Look at the Ser Num column - example, the last one above : 6506F000 65 is the frame and 6F is the disk device on the frame. Run on both nodes and see if they see the same.

Rgds...Geoff

[Alzhy]

If you do not have the EMC Inguiry utility (inq or syminq) -- you may want to try to use diskinfo command which also does the same thing albeit - you need to massage the output to suite your needs.

If you are using the new SG with Veritas extensions .. /etc/vx/diag.d/vxdmpinq tool will also confirm your storage i spresented on the 2 nodes.

[Hanry Zhou]

Geoff,

I got what I want from your message.

Now, can you please explain to me what does "frame" mean? Is this number same as WWN number for the device? What does this number represent in EMC?

Thanks,

[Geoff Wild]

The frame number is part of the serial number (I think) of the frame - example - for my post above - my frame is 1165. So the 65 tells me that. On my backup server, I see the other frames in my environment.

Rgds...Geoff

[Alzhy]

Frame as it applies to Storage Arrays is pretty much the same as on Server "Frames".. It constitutes one (1/uno/ichi)physical storage cabinet where your disks and controllers are packed.

Array Frames have serial numbers or id tags that most of the time be part of every object's id -- i.e. serial nuber of a LUN or even WWID - from that frame.