Log Overview And States - HP 418800-B21 - StorageWorks Modular Smart Array 70 Storage Enclosure User Manual
Hp storageworks replication solutions manager 4.0.1 user guide (t3680-96308, june 2008)
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Also See for 418800-B21 - StorageWorks Modular Smart Array 70 Storage Enclosure:
- Command reference manual (207 pages) ,
- Maintenance and service manual (63 pages) ,
- User manual (60 pages)
Table of Contents
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Job commands
CreateDrGroup
CreateDrGroupFromHostVolume
ForceFullCopyDrGroup
SetDrGroupAutoSuspend
SetDrGroupFailsafeOnLinkdown-
Powerup
PresentStorageVolume
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,
and
DR group
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
Replication write mode
Enhanced asynchronous
Standard asynchronous
Synchronous
104
DR Groups
Remarks
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
This job command is ignored if the feature is not available.
This job command is ignored if the feature is not available.
This job command is ignored if the feature is not available.
When a virtual disk is a remote copy, the argument Access Type =
None (No read) is ignored if the feature is not available.
normalization.
Log states
•
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
mode
•
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.
•
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.
write
mode, as shown below.
transitions.
merging
write
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Troubleshooting
