User manual

iSCSi reStore ld proCeSS
The iSCSI Backup function is used to backup an entire logical drive
with its RAID configuration intact. The restore function for iSCSI
Backup will only work if the physical drives where the logical drive will
be replaced meet two important conditions. First, the drives must not
be configured, that is, there cannot be an array or logical drive present
on the physical drives. And second, the drives must be at least as
large as the drives that contained the original logical drive in the iSCSI
Backup.
To recover a logical drive that has failed, use the Restore function of
the iSCSI Backup. In order to complete a recovery, the DataGuard
Appliance with the failed logical drive must be populated with
unconfigured hard drives in the same number and size as when the
iSCSI Backup was created.
If the failed logical drive or the array in which it was created are still
present, the restore function will abort because an LD is detected. In
order to reuse the same physical drives, assuming they remain in good
working condition, it will be necessary to first remove the existing
array made up of the physical drives. Alternatively, the original physical
drives can be replaced with new drives that are the same size or larger.
To restore a failed logical drive, make sure the conditions discussed
above apply, and follow these steps:
1. Click NAS tab > Backup > Backup to iSCSI tab.
2. Enter the IP address of the remote iSCSI device used for backup
and enter the Port used. These values should be the same are
those entered in the iSCSI Backup configuration. Click Next to
continue.
3. Find the iSCSI Name of the device in the pull-down menu. If CHAP
has been configured, click the CHAP option box to enable it and
enter the User Name and Password in the spaces provided. Click
Next to continue.
4. If more than one LD are backed up on the iSCSI device it will be
necessary to choose the LUN ID of the one that is being restored.
Use the LUN ID pull-down menu to select it. Click Next to continue.
5. Choose the Source from the pull-down menu if there are more than
one iSCSI devices with backups.
6. Click on the Restore button. The restore process will commence
after a brief negotiation process. When both systems are ready,
the restore will begin. The length of time needed to complete the
process depends on the size of the LD and the amount of data
stored on it.
Important: If the restore process fails, check to make sure that the
NAS has unconfigured (no file system, no LD, no array) hard drives
available and that the drives are at least as large as the original drives
they replace. The restoration process will abort if the array or logical
drive that failed is still present on the NAS. See “Physical Drive”
on page 26 for instructions on how to view hardware information
about the disks installed. See “Manage Disk Arrays” on page 32 for
array information. See “Logical Drive Management” on page <?>
for logical drive information.
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