Re: EMC CX LUN problem

[Nicola Murino <n.murino@xxxxxxxxxxxxxxx>]

Hi thanks all for your help,

I have two raid group, each raid group has two lun, the lun of the first raid group are for a linux cluster, the lun of the second raid group are for a windows cluster,

I installed navicli, this is the output you requested:

./navicli -h 192.168.2.11 getlun
Statistics logging is disabled.
 Certain fields are not printed if statistics
 logging is not enabled.
LOGICAL UNIT NUMBER 0
Prefetch size (blocks) =         0
Prefetch multiplier =            4
Segment size (blocks) =          0
Segment multiplier =             4
Maximum prefetch (blocks) =      4096
Prefetch Disable Size (blocks) = 4097
Prefetch idle count =            40

Variable length prefetching YES
Prefetched data retained    YES

Read cache configured according to
 specified parameters.

Total Hard Errors:          0
Total Soft Errors:          0
Total Queue Length:         0
Name                        ql
Minimum latency reads N/A

RAID Type:                  RAID5
RAIDGroup ID:               0
State:                      Bound
Stripe Crossing:            0
Element Size:               128
Current owner:              SP B
Offset:                     0
Auto-trespass:              DISABLED
Auto-assign:                DISABLED
Write cache:                ENABLED
Read cache:                 ENABLED
Idle Threshold:             0
Idle Delay Time:            20
Write Aside Size:           2048
Default Owner:              SP B
Rebuild Priority:           ASAP
Verify Priority:            ASAP
Prct Reads Forced Flushed:  0
Prct Writes Forced Flushed: 0
Prct Rebuilt:               100
Prct Bound:                 100
LUN Capacity(Megabytes):    512000
LUN Capacity(Blocks):       1048576000
UID:                        60:06:01:60:86:F0:16:00:BE:5A:CA:73:DB:8C:DA:11
Is Private:                 NO
Snapshots List:             None
MirrorView Name if any:     Not Mirrored

LOGICAL UNIT NUMBER 2
Prefetch size (blocks) =         0
Prefetch multiplier =            4
Segment size (blocks) =          0
Segment multiplier =             4
Maximum prefetch (blocks) =      4096
Prefetch Disable Size (blocks) = 4097
Prefetch idle count =            40

Variable length prefetching YES
Prefetched data retained    YES

Read cache configured according to
 specified parameters.

Total Hard Errors:          0
Total Soft Errors:          0
Total Queue Length:         0
Name                        win
Minimum latency reads N/A

RAID Type:                  RAID5
RAIDGroup ID:               1
State:                      Bound
Stripe Crossing:            0
Element Size:               128
Current owner:              SP A
Offset:                     0
Auto-trespass:              DISABLED
Auto-assign:                DISABLED
Write cache:                ENABLED
Read cache:                 ENABLED
Idle Threshold:             0
Idle Delay Time:            20
Write Aside Size:           2048
Default Owner:              SP A
Rebuild Priority:           ASAP
Verify Priority:            ASAP
Prct Reads Forced Flushed:  0
Prct Writes Forced Flushed: 0
Prct Rebuilt:               100
Prct Bound:                 100
LUN Capacity(Megabytes):    819200
LUN Capacity(Blocks):       1677721600
UID:                        60:06:01:60:86:F0:16:00:B6:2F:72:8B:DB:8C:DA:11
Is Private:                 NO
Snapshots List:             None
MirrorView Name if any:     Not Mirrored

LOGICAL UNIT NUMBER 3
Prefetch size (blocks) =         0
Prefetch multiplier =            4
Segment size (blocks) =          0
Segment multiplier =             4
Maximum prefetch (blocks) =      4096
Prefetch Disable Size (blocks) = 4097
Prefetch idle count =            40

Variable length prefetching YES
Prefetched data retained    YES

Read cache configured according to
 specified parameters.

Total Hard Errors:          0
Total Soft Errors:          0
Total Queue Length:         0
Name                        quorum
Minimum latency reads N/A

RAID Type:                  RAID5
RAIDGroup ID:               1
State:                      Bound
Stripe Crossing:            0
Element Size:               128
Current owner:              SP A
Offset:                     0
Auto-trespass:              DISABLED
Auto-assign:                DISABLED
Write cache:                ENABLED
Read cache:                 ENABLED
Idle Threshold:             0
Idle Delay Time:            20
Write Aside Size:           2048
Default Owner:              SP A
Rebuild Priority:           ASAP
Verify Priority:            ASAP
Prct Reads Forced Flushed:  0
Prct Writes Forced Flushed: 0
Prct Rebuilt:               100
Prct Bound:                 100
LUN Capacity(Megabytes):    5120
LUN Capacity(Blocks):       10485760
UID:                        60:06:01:60:86:F0:16:00:FC:D3:8B:91:DB:8C:DA:11
Is Private:                 NO
Snapshots List:             None
MirrorView Name if any:     Not Mirrored

LOGICAL UNIT NUMBER 1
Prefetch size (blocks) =         0
Prefetch multiplier =            4
Segment size (blocks) =          0
Segment multiplier =             4
Maximum prefetch (blocks) =      4096
Prefetch Disable Size (blocks) = 4097
Prefetch idle count =            40

Variable length prefetching YES
Prefetched data retained    YES

Read cache configured according to
 specified parameters.

Total Hard Errors:          0
Total Soft Errors:          0
Total Queue Length:         0
Name                        mail
Minimum latency reads N/A

RAID Type:                  RAID5
RAIDGroup ID:               0
State:                      Bound
Stripe Crossing:            0
Element Size:               128
Current owner:              SP B
Offset:                     0
Auto-trespass:              DISABLED
Auto-assign:                DISABLED
Write cache:                ENABLED
Read cache:                 ENABLED
Idle Threshold:             0
Idle Delay Time:            20
Write Aside Size:           2048
Default Owner:              SP B
Rebuild Priority:           ASAP
Verify Priority:            ASAP
Prct Reads Forced Flushed:  0
Prct Writes Forced Flushed: 0
Prct Rebuilt:               100
Prct Bound:                 100
LUN Capacity(Megabytes):    153600
LUN Capacity(Blocks):       314572800
UID:                        60:06:01:60:86:F0:16:00:E4:6F:56:7A:DB:8C:DA:11
Is Private:                 NO
Snapshots List:             None
MirrorView Name if any:     Not Mirrored

the output of scsi_id is the same:

server2 block # scsi_id -g -u -s /block/sdb
36006016086f01600e46f567adb8cda11
server2 block # scsi_id -g -u -s /block/sdc
36006016086f01600e46f567adb8cda11
server2 block # scsi_id -g -u -s /block/sdd
36006016086f01600e46f567adb8cda11
server2 block # scsi_id -g -u -s /block/sde
36006016086f01600e46f567adb8cda11
server2 block # scsi_id -g -u -s /block/sdf
36006016086f01600e46f567adb8cda11
server2 block # scsi_id -g -u -s /block/sdg
36006016086f01600e46f567adb8cda11
server2 block # scsi_id -g -u -s /block/sdh
36006016086f01600e46f567adb8cda11
server2 block # scsi_id -g -u -s /block/sdi
36006016086f01600e46f567adb8cda11

I can see and write only on the LUN called mail, I'm not able to see ql

thanks for your help,

regards
Nicola


Bernd Zeimetz ha scritto:

Hi,

  

I'm trying to configure a new emc cx storage, I have the following:
   

I defined two lun on the storage however I'm able to see only one LUN

multipath -l show the following:

multipath -l
mail (36006016086f01600e46f567adb8cda11)
[size=150 GB][features="1 queue_if_no_path"][hwhandler="1 emc"]
\_ round-robin 0 [active]
\_ 1:0:1:0 sdd 8:48  [active][ready]
\_ 1:0:1:1 sde 8:64  [active][ready]
\_ 2:0:1:0 sdh 8:112 [active][ready]
\_ 2:0:1:1 sdi 8:128 [active][ready]
\_ round-robin 0 [enabled]
\_ 2:0:0:0 sdf 8:80  [active][ready]
\_ 1:0:0:0 sdb 8:16  [active][ready]
\_ 1:0:0:1 sdc 8:32  [active][ready]
\_ 2:0:0:1 sdg 8:96  [active][ready]

   

      

did you probably just share one raid group via 2 LUNs? Then the output
of multipath is imho indeed right. For me it shows the setup you've
described - one raidgroup, shared via 2 LUNs (usually one per default on
SP A, one on SP B, attached via 2 paths per SP to a switch, accessed
from your server via 2 HBAs.
If you have access to the Navisphere cli tool - please post the output of

./navicli -h IP_OF_ONE_OF_YOUR_SPs getlun

I think this will show that my hint is right.
Imho you want to create a second raid group and share it via 2 LUNs, too.

  

http://christophe.varoqui.free.fr/wiki/wakka.php?wiki=TestedEnvironments
 

    

I hope there's nothing wring with the stuff I've written about the
EMC/CX in there, if you find anything please let me know - I don't look
in there often.


Hope that helps,

best regards


Bernd

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