Job commands
Remarks
CreateDrGroup
CreateDrGroupFromHostVolume
These arguments are ignored if the feature is not available.
AutoSuspend On Link Down
Destination RAID level
Source Log Disk Group
Destination Log Disk Group
Maximum Log Disk Size
ForceFullCopyDrGroup
This job command is ignored if the feature is not available.
SetDrGroupAutoSuspend
This job command is ignored if the feature is not available.
SetDrGroupFailsafeOnLinkdown-
Powerup
This job command is ignored if the feature is not available.
PresentStorageVolume
When a virtual disk is a remote copy, the argument
Access Type =
None (No read)
is ignored if the feature is not available.
Logs
Log overview and states
A DR group log is a designated virtual disk that stores the host data that is written to the virtual disks in a
source DR group. The contents of the log are replicated to the destination virtual disks to synchronize
them with their sources.
The process of storing host data, in the exact order received in the DR group, is called logging. The
process of replicating the logged data to the destination DR group, in the same order as received, and
synchronizing with the sources is called merging or DR group normalization. See
logging
,
merging
and
DR group normalization
.
When a DR group log becomes full, a full copy is automatically initiated. See full copy mode and log size.
Log states
The DR group log states depend upon the
write mode
, as shown below.
Replication write mode
Log states
Enhanced asynchronous
•
Normal
. All source disks in the DR group are continuously logging
and merging.
•
Running down
. All source disks in the DR are merging as the
result of a requested transition to synchronous mode. See
write
mode transitions
.
Standard asynchronous
•
Not in use
. No source virtual disk in the DR group is logging
or merging.
•
Logging
. At least one source virtual disk in the DR group is
logging but none are merging.
•
Merging
. At least one source virtual disk in the DR group is
merging.
Synchronous
•
Not in use
. No source virtual disk in the DR group is logging
or merging.
•
Logging
. At least one source virtual disk in the DR group is
logging but none are merging.
•
Merging
. At least one source virtual disk in the DR group is
merging.
104
DR Groups
Summary of Contents for 418800-B21 - StorageWorks Modular Smart Array 70 Storage Enclosure
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Page 20: ...20 About this guide ...
Page 56: ...56 Replication Solutions Manager ...
Page 160: ...160 Host volumes ...
Page 384: ...384 Managed sets ...
Page 402: ...402 Oracle ...
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Page 444: ...444 Virtual disks ...
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