Windows Knowledge Base

[DMX]How to show DMX RDF Configuration

Symcfg list -v

Symcfg list -v can be used to detailed information about all Symmetrix units in the configuration, such as whether the concurrent RDF and dynamic RDF states are enabled on each Symmetrix.

 

C:\>symcfg list -sid 1234 -v

 

Symmetrix ID: 000190101234

Time Zone : Eastern Standard Time

 

Product Model : DMX3-24

Symmetrix ID : 000190101234

 

Microcode Version (Number) : 5772 (168C0000)

Microcode Date : 02.28.2008

 

Microcode Patch Date : 02.28.2008

Microcode Patch Level : 88

 

Cache Size (Mirrored) : 49152 (MB)

# of Available Cache Slots : 1229436

# of PermaCache Slots In Use : 45

Max # of System Write Pending Slots : 984508

Max # of DA Write Pending Slots : 492254

Max # of Device Write Pending Slots : 49220

 

Symmetrix Total Operating Time : 504 days, 02:32:25

Symmetrix Power ON Time : Fri Oct 05 14:09:55 2007

Symmetrix Last IPL Time (Cold) : Fri Oct 05 15:00:50 2007

Symmetrix Last Fast IPL Time (Hot) : Fri Feb 06 20:48:20 2009

 

Host DB Sync Time : Fri Feb 20 15:42:20 2009

Symmetrix CLI (SYMCLI) Version : V6.4.2.0 (Edit Level: 845)

Built with SYMAPI Version : V6.4.2.0 (Edit Level: 845)

SYMAPI Run Time Version : V6.4.2.0 (Edit Level: 845)

SYMAPI Server Version : unavailable

 

Number of Configured (Sym) Devices : 3252

Number of Visible (Host) Devices : 0

Number of Configured Actual Disks : 244

Number of Configured Hot Spares : 8

Number of Unconfigured Disks : 0

Maximum number of hypers per disk : 255

 

Number of Powerpath Devices : 2

Powerpath Run Time Version : 4.5

 

SDDF Configuration State : Enabled

Configuration Change State : Enabled

WORM Configuration Level : WORM_3

WORM Characteristics : MANUAL_LOCK

 

Symmetrix Configuration Checksum : 101A184

Switched RDF Configuration State : Enabled

Concurrent RDF Configuration State : Enabled

Dynamic RDF Configuration State : Enabled

Concurrent Dynamic RDF Configuration : Enabled

RDF Data Mobility Configuration State: Disabled

Access Control Configuration State : Enabled

Device Masking (VCM) Config State : Enabled

VCMdb Access Restricted State : N/A

Multi LRU Device Assignment : BY_NUMBER

Disk Group Assignments : In Use

Hot Swap Policy : Permanent

Symmetrix Disk Library : Disabled

FBA Geometry Emulation : Native

3 Dynamic Mirrors : Disabled

Cache Partitioning : Disabled

 

Parity Raid Configuration : N/A

Raid-5 Configuration : RAID-5 (3+1)

Raid-6 Configuration : N/A

PAV Mode : DynamicStandardPAV

PAV Alias Limit : 31

 

SRDF/A Maximum Host Throttle (Secs) : 0

SRDF/A Maximum Cache Usage (Percent) : 94

 

- You can see from the output that two host HBAs are configured to provide support for controlling SRDF consistency groups.  
- Both the SDDF Configuration State (the ability to track changes and perform incremental updates) and the Configuration Change State (the state of allowing configuration changes) are enabled. The WORM (Write Once Read Many) configuration level is also enabled.

symcfg list –ra all

This command reaches all Symmetrix units that are accessible through RDF links one or two hops away and displays Remote Link Director information.

 

C:\>symcfg list -ra all

 

 

Symmetrix ID: 000190101235 (Local)

 

S Y M M E T R I X R D F D I R E C T O R S

 

 

Remote Local Remote

Ident Symb Num Slot Type Attr SymmID RA Grp RA Grp Status

 

RF-7D 07D 55 7 RDF-BI-DIR - 000190101234 1 (00) 1 (00) Online

RF-10D 10D 58 10 RDF-BI-DIR - 000190101234 1 (00) 1 (00) Online

 

Symmetrix ID: 000190101234 (Remote)

 

S Y M M E T R I X R D F D I R E C T O R S

 

 

Remote Local Remote

Ident Symb Num Slot Type Attr SymmID RA Grp RA Grp Status

 

RF-7D 07D 55 7 RDF-BI-DIR - 000190101235 1 (00) 1 (00) Online

RF-10D 10D 58 10 RDF-BI-DIR - 000190101235 1 (00) 1 (00) Online

 

Output above tells us that SYM1234 and SYM1235 are connected to each other, this is single hop RDF configuration, which involves two DMX system and it is pretty common SRDF configuration.

There is another scenario which in EMC world it's called Multi-Hop RDF and it basically mirroring through an intermediate Symmetrix system in this configuration an RA adapter can be the interface to an RDF link between Symmetrix systems. As illustrated below, RDF groups (RA groups) represent an established connection between paired R1 and R2 devices, forming an SRDF-pair-associated link. The Local RA Grp and Remote RA Grp columns list the RA group numbers in the Figure 1 configuration. RA group 2 forms the RDF link between Symmetrix units 1234 and 1235. RA group 1 forms the link between Symmetrix units 1235 and 1236.

Figure-1  Multi-Hop RDF configuration

Below is symcfg list -ra all output in Multi-Hop RDF configuration:

 

C:\>symcfg list -ra all

 

 

Symmetrix ID: 000190101234 (Local)

 

S Y M M E T R I X R D F D I R E C T O R S

 

 

Remote Local Remote

Ident Symb Num Slot Type Attr SymmID RA Grp RA Grp Status

 

RF-7D 07D 55 7 RDF-BI-DIR - 000190101235 2 (01) 2 (B) Online

RF-10D 10D 58 10 RDF-BI-DIR - 000190101235 2 (01) 2 (B) Online

 

Symmetrix ID: 000190101236 (Remote)

 

S Y M M E T R I X R D F D I R E C T O R S

 

 

Remote Local Remote

Ident Symb Num Slot Type Attr SymmID RA Grp RA Grp Status

 

RF-7D 07D 55 7 RDF-BI-DIR - 000190101235 1 (00) 1 (00) Online

RF-10D 10D 58 10 RDF-BI-DIR - 000190101235 1 (00) 1 (00) Online

 

 

Symmetrix ID: 000190101235 (Remote)

 

S Y M M E T R I X R D F D I R E C T O R S

 

 

Remote Local Remote

Ident Symb Num Slot Type Attr SymmID RA Grp RA Grp Status

 

RF-7D 07D 55 7 RDF-BI-DIR - 000190101236 1 (A) 1 (00) Online

RF-3D 03D 50 3 RDF-BI-DIR - 000190101234 2 (B) 2 (01) Online

RF-10D 10D 58 10 RDF-BI-DIR - 000190101236 1 (A) 1 (00) Online

RF-14D 14D 14 14 RDF-BI-DIR - 000190101234 2 (B) 2 (01) Online