QNAP TS-412 User Manual

Chapter 8. RAID Recovery
The QNAP NAS supports exclusive RAID recovery technology to recover a failed RAID disk
volume from unintentional disconnection or removal of the hard drives from the system.
Using the RAID recovery, users can recover an inactive RAID 1, RAID 5, or RAID 6 volume
to degraded mode, or an inactive RAID 0 and JBOD configuration to normal.
Disk volume Supports RAID recovery Maximum number of disk
removal allowed
Single No -
JBOD Yes 1 or more
RAID 0 Yes 1 or more
RAID 1 Yes 1 or 2
RAID 5 Yes 2 or more
RAID 6 Yes 3 or more
RAID 10 No -
If the volume status is not active, users can install the same hard drives back to the same
slots of the NAS. Then click “RECOVER” on the “Disk Management” > “Volume
Management” page. Wait for about 60 seconds for the process to complete. When
finished, the data can be accessed.
Note:
 After recovering a RAID 1, RAID 5, or RAID 6 disk volume from not active to degraded
mode by the RAID recovery, users can read or write the volume normally. The volume
status will be recovered to normal after synchronization.
 If the disconnected drive member is damaged, the RAID recovery function will not
work.
41

QNAP TS-412 Specifications

General

RAID levels	0, 1, 5, 6, 10
Storage drive size	2.5/3.5 \
Storage drive capacity	- GB
Supported file systems	ext3, ext4, FAT32, HFS+, NTFS
Storage drive interface	Serial ATA, Serial ATA II
Total installed storage capacity	- TB
Maximum supported storage capacity	8 TB
Number of storage drives installed	-
Number of storage drives supported	4
Flash memory	16 MB
Internal memory	0.25 GB
Internal memory type	DDR2
Processor model	6281
Processor family	Marvell
Processor frequency	1.2 GHz
Number of processors installed	1
Fan	90 mm
Dimensions (WxDxH)	180 x 235 x 177 mm
Power requirements	100-240V
Networking features	Gigabit Ethernet
Compatible operating systems	Windows 2000; Windows XP; Windows Vista (32/ 64 bit); Windows Windows 7 (32/ 64 bit); Windows Server 2003/2008; Mac OS X; Linux & Unix.
DHCP client	Yes
Maximum data transfer rate	1000 Mbit/s
Supported network protocols	TCP/IP
Security algorithms	HTTPS, SSH, SSL/TLS
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	2
Chassis type	Tower
LED indicators	HDD, LAN, Power, Y
Number of fans	1 fan(s)
Power consumption (sleep)	11 W
Power consumption (typical)	26 W
Power supply unit (PSU) capacity	120 W
Operating temperature (T-T)	0 - 40 °C

Weight and Dimensions

Weight	3000 g