Skip to main content

Dell Unity™ Family Unisphere® Command Line Interface User Guide

PDF

Manage VNX import sessions for block

A block VNX import is the process in which block LUNs or LUN Groups are imported from a VNX1/VNX2 storage system (source) to a remote Unity storage system (target). Block VNX import makes use of the SANCopy feature which must be enabled and configured on the source system.

Each block import session is identified by an ID. The Unisphere online help provides more details about import of block storage.

NOTE:At any given point in time, only one command is supported on a block import session. Before running a new command, ensure that you wait for the existing action on the block import session to complete.

The following table lists the attributes related to block import sessions:

Table 1. Block import session attributes
Attribute	Description
ID	ID of the block import session.
Name	Name of the block import session.
Health state	Health state of the block import session. Valid values are: Unknown (0) — The remote system health cannot be determined. OK (5) — Session is operating normally. OK BUT (7) — Session is in one of the following states: Session is initialized but paused. Session is paused to migrate data in initial copy. Session is paused to sync data in incremental copy. Degraded/Warning (10) — The session failed for one of the following reasons: Session failed to read some source files. Session failed to copy file from source to destination. Minor failure (15) — The session failed for one of the reasons listed in Reasons for import sessions Minor failures. Non-recoverable error (30) — An error has caused one or more of the following: Session failed. Session failed due to an unrecoverable failure in initial copy. Session failed due to an unrecoverable failure in incremental copy. NOTE: If the migration session is in an error state, the session will not be recoverable. You will need to delete the session and create a new migration session.
Health details	Additional health information. See Appendix A, Reference, for details.
State	State of the block import session. Valid values are: Pending Syncing Paused Ready to cutover Cancelling Cancelled
Progress	Block import session progress.
Source system	Remote system identifier for source system.
Source resource	Source resource identifier.
Target resource	Target resource identifier.
Estimated remaining bytes	Specifies the current estimated remaining bytes to be transferred for the current import stage. Only supported for block import.
Percent remaining for import	Specifies the percentage of remaining bytes to be imported against the total size of the import resource.
Cutover threshold percentage	When Percent remaining for import is below this threshold, the state of the import session changes to Ready to cutover.
Throttle	Specifies whether to throttle the import transfer. When throttle is applied, the import session data transfer rate will be throttled back to minimize impact on host I/O operations. When throttle is off, the import session functions at full speed which could impact host I/O latencies. Valid values are: yes no