Description

Important: The following process is applicable to Solaris systems running 5.0 MP3 or higher.

The following EMC CLARiiON devices are presented to a Solaris server using Veritas DMP as the multipathing solution.

Array Volume Identifier Support
 

As configurations in data centers scale up and more SAN devices and nodes have to be managed, there is a greater need for consistency and predictability in device naming.

Storage Foundation(SF) support two device naming schemes - Operating System Native (OSN) naming and Enclosure Based Names (EBN)

Enclosure name consistency usually is not a problem and even when hosts are connected to multiple enclosures of the same type, the number of enclosures is small enough that consistency can be ensured through manual configurations.

Device index consistency that uniquely identifies the device within that enclosure on the other hand can be inconsistent.


To overcome this limitation SF 5.0 MP3 introduces a third naming convention sometimes referred as "EBN_AVID" to enable device name consistency


EBN = Enclosure Based Naming
AVID = Array Volume Identifier


How the introduction of the AVID features makes life easier


With the introduction of the new EBN_AVID naming scheme, identifying storage devices becomes far easier with consistent device naming across multiple nodes connected to the same storage and the disk access name will never change as it is based on the name defined at the array level.


When SF does not have access to a device AVID, it retrieves another unique LUN identifier called LUN serial number

SF will sort the devices based on the LUN serial number (LSN) and uses the index to create the suffix for the device name. All nodes that see the same set of devices, will have the same sorted list, leading to consistent device indices across the cluster.

Finally, Storage Foundation supports a scalable framework allowing users to fully customize the device names on a host by applying a 'device naming file' that associates custom names with cabinet and LUN serial numbers.


# vxddladm get namingscheme
NAMING_SCHEME PERSISTENCE LOWERCASE USE_AVID
============================================================
Enclosure Based     Yes                   Yes                Yes


Note: EBN_AVID co-existence with EMC PowerPath controlled devices is not supported, therefore, the EBN_AVID naming convention is suppressed

How to view the EMC CLARiiON devices associated with StorageGroup "vcssx065_066"

Sample output

# /opt/Navisphere/bin/naviseccli -h 10.209.64.29 storagegroup -list -gname vcssx065_066 -host

Storage Group Name:    vcssx065_066
Storage Group UID:     24:1D:66:4B:F2:12:DE:11:91:E0:00:60:16:1E:66:AC
HBA/SP Pairs:

  HBA UID                                          SP Name     SPPort
  -------                                          -------     ------
  20:00:00:E0:8B:14:0C:04:21:00:00:E0:8B:14:0C:04   SP A         4
Host name:             vcssx066
  20:00:00:E0:8B:14:0C:04:21:00:00:E0:8B:14:0C:04   SP B         4
Host name:             vcssx066

HLU/ALU Pairs:

  HLU Number     ALU Number
  ----------     ----------
    0               600
    1               601
    2               602
    3               604
    5               605
    4               603

HLU/SLU Pairs:

 HLU No.  SNAP SHOT UID                                     SNAP SHOT NAME
 ------  -----------------------------------------------    --------------
 6       60:06:01:60:3A:31:1F:00:36:8A:EF:49:4E:D1:DF:11      lun600_fd_snapshot
 7       60:06:01:60:3A:31:1F:00:38:9B:D5:9F:59:D1:DF:11      lun601_fd_snapshot
 8       60:06:01:60:3A:31:1F:00:7C:EB:C3:03:5A:D1:DF:11      lun602_fd_snapshot
Shareable:             YES

How to view the EMC MirrorView SnapView session content for EMC CLARiiON IP address "10.209.64.29"

Sample output

# /opt/Navisphere/bin/naviseccli -h 10.209.64.29 snapview -listsessions
Name of the session:  VCS_fd_session
Number of read requests serviced by the snapview cache pool:  0
Total number of read requests on the snapview logical unit:  0
Number of reads from the TLU:  0
Number of writes requests in the session:  0
Number of writes requests to cache that triggered a COW:  0
Total number of writes requests on the snapview target logical unit:  0
Number of writes requests larger than the chunk size:  0
Cache Capacity in GB:  87.879211
Session Usage:  0
List of Target Logical Units:  LUN 600, LUN 602, LUN 601
snap Logical Units UID:  60:06:01:60:3A:31:1F:00:36:8A:EF:49:4E:D1:DF:11, 60:06:01:60:3A:31:1F:00:7C:EB:C3:03:5A:D1:DF:11, 60:06:01:60:3A:31:1F:00:38:9B:D5:9F:
59:D1:DF:11
snap Logical Units Name:  lun600_fd_snapshot, lun602_fd_snapshot, lun601_fd_snapshot
Session in persistence:  YES
Session creation time:  10/05/10 19:56:23
Session state:  Normal

Ensure no stale device entries exist and refresh Volume Manager

Note: It is critical that no Stale device entries exist in /dev/[r]dsk prior to the discover of the new EMC CLARiiON devices.
 

# devfsadm -Cvc disk

Refresh Volume Manager and update the /etc/vx/disk.info file

# vxdisk scandisks

# vxddladm assign names

Enable Solaris to discover the new EMC CLARiiON SnapView (snapshot) devices

# cfgadm -alo show_FCP_dev
Ap_Id                          Type         Receptacle   Occupant     Condition
c1                             fc-fabric    connected    configured   unknown
c1::5006016041e02d28,0         disk         connected    configured   unknown
c1::5006016841e0a366,0         disk         connected    configured   unknown
c1::5006016841e0a366,1         disk         connected    configured   unknown
c1::5006016841e0a366,2         disk         connected    configured   unknown
c1::5006016841e0a366,3         disk         connected    configured   unknown
c1::5006016841e0a366,4         disk         connected    configured   unknown
c1::5006016841e0a366,5         disk         connected    configured   unknown
c1::5006016841e0a366,6         disk         connected    configured   unknown
c1::5006016841e0a366,7         disk         connected    configured   unknown
c1::5006016841e0a366,8         disk         connected    configured   unknown
c1::50060e8005650921           unavailable  connected    unconfigured failed
#

Note: The EMC CLARiiON snapshot devices are "5006016841e0a366,6", "5006016841e0a366,7" and "5006016841e0a366,8".

# vxdisk list
DEVICE       TYPE            DISK         GROUP        STATUS
disk_0       auto:sliced     c2t0d0       rootdg       online
disk_1       auto:sliced     c2t0d0-s0    rootdg2      online
emc_clariion0_600 auto            -            -            error
emc_clariion0_601 auto            -            -            error
emc_clariion0_602 auto            -            -            error
emc_clariion0_603 auto            -            -            error
emc_clariion0_604 auto            -            -            error
emc_clariion0_605 auto            -            -            error

# vxdisk scandisks

Note: The EMC CLARiiON snapshot devices are now visible to Volume Manager

# vxdisk list
DEVICE       TYPE            DISK         GROUP        STATUS
disk_0       auto:sliced     c2t0d0       rootdg       online
disk_1       auto:sliced     c2t0d0-s0    rootdg2      online
emc_clariion0_600 auto            -            -            error
emc_clariion0_600_1 auto:cdsdisk    -            -            online
emc_clariion0_601 auto            -            -            error
emc_clariion0_601_1 auto:cdsdisk    -            -            online
emc_clariion0_602 auto            -            -            error
emc_clariion0_602_1 auto:cdsdisk    -            -            online
emc_clariion0_603 auto            -            -            error
emc_clariion0_604 auto            -            -            error
emc_clariion0_605 auto            -            -            error

Note: The Volume Manager related diskgroup(s) can be imported at this time.