APC RAID Subsystem SCSI-SATA II - Manual (Page 78)

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capacity needs to be greater or equal to the source capacity. (The target UDV
capacity is equal or larger than the source UDV capacity.)
To do a QCopy task, please follow the below steps:
1. Take snapshot on the source UDV, for detail setup steps of snapshot,
please refer to section 4.4.1. When setup UDV block size, please set
512B for the block size. The QCopy now supports 512B block size only.
2. Click QCopy icon “ ” on the selected snapshot UDV
3. Input the remote iSCSI target IP, Click “ ”, and wait
for a while, when webui recieves the target UDV information and
corresponding LUN
4. Select remote target LUN of the target UDV which is for QCopy, Click
“ ”, then there will be a pop-up window to ask user
to dismount the target UDV from host/server first. This dismount step is
to avoid any data inconsistence from others. After the target UDV is
dismounted from host/server, then click “Yes” for confirmation.
5. When the QCopy is processing data, on the \Volume config\User data
volume status colume, there will be an indicator “ ” for QCopy and
completed percertage.
6. The source system will issue one “INFO” event describes the replication
setting. E.g., INFO:Wed, 28 Mar 2007 17:23:55 CST Qcopy start,
Target
iqn.2004-08.tw.com.proware:iS16GL-000a00021:default-
target,IP 192.168.10.187 ,Type Duplicate.
7. If the replication has been completed successfully, the source system
will issue one “INFO” event describes the replication started at what
time and completed at what time.
8. The source system will try to recoonect the target system when there is
any network error or unstable transferring. And if the replication has
been stopped for some interrupts, the source system will issue one
“WARNING” event describes the possibility of the interrupts to stop the
replication. The possibility to stop the replication may be “network link
failure”, “the target system not reachable”, “connection fail”, and etc.
9. When the causes to the interrupts have been removed, the users can
manually activate the QCopy replication again to restart the replication
work. The source system will issue one “INFO” event describes the
replication has been resumed.
When the QCopy is completed, user can delete the LUN of the target UDV for
avoiding wrong operation or deleting data. When recovery is needed, the
operation steps are the same as replication steps, user only needs to setup the
QCopy service from target system reversely.