How to suspend the replicated state for EMC SRDF devices
Article ID: 100037817
Updated On:
Description
Description
This document attempts to explain the steps required to suspend the replicated state for EMC SRDF devices.
In this instance, the configuration consists of "4" EMC SRDF "R1" devices presented to production server "Dopey" from EMC Symmetrix id (SID) "822". An additional "4" EMC SRDF "R2" devices have been presented to DR server "Bashful" from EMC Symmetrix ID (SID) "414".
Note: The symrdf "suspend"operation suspends I/0 traffic on the RDF links for the remotely mirrored pair(s) in the group.
Figure 1.0
Note: The R1 (source) devices from server Dopey are replicated to the R2 (target) devices presented to server Bashful.
In this instance, the EMC DeviceGroup name is "DopeyDg" as confirmed by "symdg list" shown below:
Dopey # symdg list
D E V I C E G R O U P S
Number of
Name Type Valid Symmetrix ID Devs GKs BCVs VDEVs TGTs
DopeyDg RDF1 Yes 000290300822 4 0 0 0 0
Steps:
1.] To determine the current SRDF replicated state, use either SYMCLI commands "symrdf -sid
Dopey # symrdf -sid 822 list pd
Symmetrix ID: 000290300822
Local Device View
----------------------------------------------------------------------------
STATUS MODES RDF S T A T E S
Sym RDF --------- ----- R1 Inv R2 Inv ----------------------
Dev RDev Typ:G SA RA LNK MDAT Tracks Tracks Dev RDev Pair
---- ---- -------- --------- ----- ------- ------- --- ---- -------------
008C 0072 R1:11 RW RW RW S..1 0 0 RW WD Synchronized
008D 0073 R1:11 RW RW RW S..1 0 0 RW WD Synchronized
008E 0074 R1:11 RW RW RW S..1 0 0 RW WD Synchronized
008F 0075 R1:11 RW RW RW S..1 0 0 RW WD Synchronized
Total -------- --------
Track(s) 0 0
MB(s) 0.0 0.0
Legend for MODES:
M(ode of Operation): A = Async, S = Sync, E = Semi-sync, C = Adaptive Copy
D(omino) : X = Enabled, . = Disabled
A(daptive Copy) : D = Disk Mode, W = WP Mode, . = ACp off
(Mirror) T(ype) : 1 = R1, 2 = R2
Note: Both outputs confirm that the SRDF devices are "synchronized" in this instance.
2.] To suspend the replicated state for EMC SRDF "Device-Group", type:
In this instance, the "Device-Group" is "DopeyDg".
Dopey # symrdf -g DopeyDg suspend
Execute an RDF 'Suspend' operation for device group 'DopeyDg' (y/[n]) ? y
An RDF 'Suspend' operation execution is in progress for device group 'DopeyDg'. Please wait...
Suspend RDF link(s).......................................Done.
The RDF 'Suspend' operation successfully executed for device group 'DopeyDg'.
3.] To confirm the replicated state has been suspended, type:
Dopey # symrdf -g DopeyDg query
Device Group (DG) Name : DopeyDg
DG's Type : RDF1
DG's Symmetrix ID : 000290300822 (Microcode Version: 5773)
Remote Symmetrix ID : 000290301414 (Microcode Version: 5773)
RDF (RA) Group Number : 11 (0A)
Source (R1) View Target (R2) View MODES
-------------------------------- ------------------------ ----- ------------
ST LI ST
Standard A N A
Logical T R1 Inv R2 Inv K T R1 Inv R2 Inv RDF Pair
Device Dev E Tracks Tracks S Dev E Tracks Tracks MDA STATE
-------------------------------- -- ------------------------ ----- ------------
DEV08C 008C RW 0 0 NR 0072 WD 0 0 S.. Suspended
DEV08D 008D RW 0 0 NR 0073 WD 0 0 S.. Suspended
DEV08E 008E RW 0 0 NR 0074 WD 0 0 S.. Suspended
DEV08F 008F RW 0 0 NR 0075 WD 0 0 S.. Suspended
Total -------- -------- -------- --------
Track(s) 0 0 0 0
MB(s) 0.0 0.0 0.0 0.0
Legend for MODES:
M(ode of Operation): A = Async, S = Sync, E = Semi-sync, C = Adaptive Copy
D(omino) : X = Enabled, . = Disabled
A(daptive Copy) : D = Disk Mode, W = WP Mode, . = ACp off
or
In this instance, the EMC Symmetrix ID (SID) is "822" for the local server.
Dopey # symrdf -sid 822 list pd
Symmetrix ID: 000290300822
Local Device View
----------------------------------------------------------------------------
STATUS MODES RDF S T A T E S
Sym RDF --------- ----- R1 Inv R2 Inv ----------------------
Dev RDev Typ:G SA RA LNK MDAT Tracks Tracks Dev RDev Pair
---- ---- -------- --------- ----- ------- ------- --- ---- -------------
008C 0072 R1:11 RW RW NR S..1 0 0 RW WD Suspended
008D 0073 R1:11 RW RW NR S..1 0 0 RW WD Suspended
008E 0074 R1:11 RW RW NR S..1 0 0 RW WD Suspended
008F 0075 R1:11 RW RW NR S..1 0 0 RW WD Suspended
Total -------- --------
Track(s) 0 0
MB(s) 0.0 0.0
Legend for MODES:
M(ode of Operation): A = Async, S = Sync, E = Semi-sync, C = Adaptive Copy
D(omino) : X = Enabled, . = Disabled
A(daptive Copy) : D = Disk Mode, W = WP Mode, . = ACp off
(Mirror) T(ype) : 1 = R1, 2 = R2
Process complete.
or
Dopey # symrdf -g DopeyDg query
Device Group (DG) Name : DopeyDg
DG's Type : RDF1
DG's Symmetrix ID : 000290300822 (Microcode Version: 5773)
Remote Symmetrix ID : 000290301414 (Microcode Version: 5773)
RDF (RA) Group Number : 11 (0A)
Source (R1) View Target (R2) View MODES
-------------------------------- ------------------------ ----- ------------
ST LI ST
Standard A N A
Logical T R1 Inv R2 Inv K T R1 Inv R2 Inv RDF Pair
Device Dev E Tracks Tracks S Dev E Tracks Tracks MDA STATE
-------------------------------- -- ------------------------ ----- ------------
DEV08C 008C RW 0 0 RW 0072 WD 0 0 S.. Synchronized
DEV08D 008D RW 0 0 RW 0073 WD 0 0 S.. Synchronized
DEV08E 008E RW 0 0 RW 0074 WD 0 0 S.. Synchronized
DEV08F 008F RW 0 0 RW 0075 WD 0 0 S.. Synchronized
Total -------- -------- -------- --------
Track(s) 0 0 0 0
MB(s) 0.0 0.0 0.0 0.0
Legend for MODES:
M(ode of Operation): A = Async, S = Sync, E = Semi-sync, C = Adaptive Copy
D(omino) : X = Enabled, . = Disabled
A(daptive Copy) : D = Disk Mode, W = WP Mode, . = ACp off
Issue/Introduction
