User manual

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With this function, RAID group capacity can be expanded by replacing hard disk drives in an
array one by one. This option is supported for the following RAID types: RAID 1, RAID 5,
RAID 6 and RAID 10. Follow these steps to expand a RAID group:
1. Go to "Storage Manager" > "STORAGE" > "Storage Space".
2. Double click a storage pool to be expanded to bring up the Storage Pool Management
page.
3. Select a RAID group and click "Manage" > "Expand Capacity".
4. Select at least one hard disk drive and click "Change". After the description displays
"Please remove this drive", remove the hard disk drive from the NAS or expansion
enclosure.
5. After the description displays "You can replace this drive", plug in the new hard disk drive
to the drive slot. Repeat the same process for all hard drives to be replaced. Click
"Expand Capacity" to continue.
6. Click "Yes".
7. The chosen RAID group will be expanded.
Note: Available RAID management operations are detailed in the chapter on RAID
Groups.
Setting a Threshold
The system will generate a warning message in system logs when the storage pool used size
hits the threshold. To set a threshold value for a storage pool, follow these steps:
1. Go to "Storage Manager" > "STORAGE" > "Storage Space".
2. Double click a storage pool to set a threshold to bring up the Storage Pool Management
page.
3. Click "Actions" > "Set Threshold".
4. Enter a value for alert threshold and click "Apply".
Setting Snapshot Reservation
You can set snapshot reservation space to ensure enough space for saving snapshots.
Snapshot reservation is set as a percentage of total storage pool space and there are two
scenarios:
 When the snapshot reserve is set to 0%, new snapshots taken will all be saved to a
storage pool until that storage pool runs out of its space. When that happens, the system
will start recycling older snapshots regardless the snapshot limitation set in Snapshot
Global Settings.