QNAP TS-212P User Manual

109
Chapter 9. RAID Recovery
The QNAP NAS supports RAID recovery when a healthy drive is unexpectedly removed from
a RAID or JBOD configuration. Even if a healthy drive is removed from a degraded RAID
1/5/6 configuration while attempting to hot-swap a faulty drive, the user can reinsert the
drive back into its original position to recover the RAID. RAID recovery is also supported
when a healthy drive is unexpectedly removed from a RAID 0/JBOD configuration. Note
that RAID 10 does not support this feature.
When a healthy drive is unexpectedly removed from a RAID group, the status of the RAID
will change to “Not active”. To recover from a “Not active” status:
1. Re-insert all hard drives back into the NAS in its original order. This includes any bad
drive(s) that will need to be replaced after recovery.
2. Log into QTS as administrator and go to “Control Panel” > “Storage Manager” >
“Storage Space”.
3. Double click on the affected Storage Pool to open the Storage Pool Management
window.
4. In the “Storage Pool Management” window, click on the “Manage” button and select
“Recover”.
The process will take approximately 60 seconds to complete. When recovery is completed,
the RAID group should be restored to its initial status.
See chart below for RAID status during this process.
Initial
Status
Status After Healthy
Drive is Removed
Status After Drive is
Re-Inserted and Storage
Pool is Recovered
RAID 0/JBOD Ready Not active Ready
RAID 1/5/6 Ready Degraded Rebuilding
RAID 1/5/6 Degraded Not active Degraded
The chart below describes the events of an error when using RAID 5.
RAID 5 (Minimum 3 Disks)
QTS Standard

QNAP TS-212P Specifications

General

RAID levels	0, 1, JBOD
RAID support	Yes
Storage drive capacity	8 GB
Storage drive interface	Serial ATA II
Storage drives installed	No
Installed storage drive type	-
Supported storage drive types	HDD
Total installed storage capacity	0 TB
Maximum supported storage capacity	8 TB
Number of storage drives installed	0
Number of storage drives supported	2
Processor family	Marvell
Processor frequency	1.66 GHz
Flash memory	16 MB
Internal memory	512 GB
Internal memory type	DDR3
Ethernet LAN data rates	10, 100, 1000 Mbit/s
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Ethernet LAN (RJ-45) ports	1
Product color	White
Type	NAS
Power consumption (sleep)	6 W
Power consumption (typical)	13 W

Weight and Dimensions

Depth	218.4 mm
Width	85 mm
Height	165.5 mm
Weight	910 g
Package weight	2200 g