Qnap failed to recover raid group

In this case it is highly advised to replace the faulty disk as soon as possible to avoid any data loss. In some cases the rebuild of the RAID might not start automatically. If you encounter this you may set the new drive as a spare disk first. The rebuild will start immediately after this is done. If you have any further questions about QNAP products or solutions, contact customer service through the Service Portal. You should hot-swap the faulty disk without turning the NAS off. The new drive should have at least the same capacity as the failed drive.

Remove the faulty drive from the NAS. Install the new drive into the NAS. You will hear a beep for 1. The Status LED will alternate between flashing red and green. If this does not happen automatically, please keep reading below. When the rebuilding is completed, the Status LED will be in green and the volume status will change to Ready.

Thank you for your feedback. HelloWelcome! You can start using a variety of QNAP member services. Software Store Get licenses for advanced features from our Software Store.In this chapter, the following topics are covered:.

How to Schedule SMART Disk Tests on QNAP

RAID group types. Refer to the table below for explanations on RAID types:.

qnap failed to recover raid group

However, this setup does not provide any redundancy protection. So, in the event that a disk is corrupted or otherwise damaged, all data on that disk will be lost.

A striping RAID group combines two or more disks into one large, logical disk. It offers the fastest disk access performance but no data redundancy protection in the event of disk failure or damage. The disk capacity is the sum of all disks. Disk striping is usually used to maximize disk capacity or to accelerate disk access speed. Please note that RAID 0 configuration is not recommended for storing sensitive data. Disk Mirroring protects your data by automatically mirroring the contents of one disk to the second disk in the mirrored pair.

It provides protection in the event of a single disk failure. The storage capacity is equal to the capacity of the smallest single disk, as the second disk drive is used to back up the first disk drive. RAID 1 configuration is suitable for storing sensitive data on a corporate or personal level.

RAID 5 configurations are ideal for organizations running databases and other transaction-based applications that require storage efficiency and data protection. A minimum of 3 hard disks are required to create a RAID 5 group. The total capacity of the RAID 5 group is equal to the size of the disk with the smallest capacity in the array times the number of hard disk — 1. It is recommended though not required that only hard drives of the same brand and capacity are used to establish the most efficient hard drive capacity.

In addition, if your system contains four disk drives, it is possible to use three drives to implement a RAID 5 data array with the fourth drive kept as a spare disk. In this configuration, the system will automatically use the spare disk to rebuild the array in the event of a physical disk failure. A RAID 5 configuration can survive one disk failure without losing any system functionality. When a disk fails in RAID 5, the disk volume will operate in the "degraded mode". There is no more data protection at this stage, and all the data will be lost if the unit suffers a second disk failure.

A failed disk should be immediately replaced. Users can choose to install a new disk after turning off the server or hot-swap the new disk while the server is running. The status of the disk volume will change to "rebuilding" after installing a new disk.If the md-raid records are damaged, an operating system cannot access a RAID volume any longer.

From the user's perspective it looks like data loss. There are cases when with a bit of troubleshooting you can access data. However, consider contacting QNAP support before trying manual troubleshooting because sometimes they can help you troubleshoot the case for free. We cannot say that QNAP support can fix any failure, but you should make an attempt, anyway it is free and spoils nothing.

At worst you leave with what you had before and can proceed with some other troubleshooting options. The best solution in this case is to take the device to a local repair shop to check the PSU. Most likely after a technician replaces the PSU, the device will work again.

Home Purchase Assistance User manual About us. Awards and reviews. QNAP doesn't turn on at all and you cannot access the data stored on it. Download and launch ReclaiMe File Recovery software. Select the desired volume and start the scan. Preview the recovered data and then save the needed files and folders. QNAP troubleshooting There are cases when with a bit of troubleshooting you can access data.

QNAP turns on but its behavior is strange If your QNAP is out of warranty and behaves strangely when turning on like: turns on and hangs during startup, does not beep after the power is on, does not turn on at all, then, likely, you deal with Power Supply Unit PSU failure. All the steps on video. Create a new ticket.Now, you can Reboot your device with this command. But also you can Type these commands to reset your configration settings.

Nice pre-release testing, QNAP! Commands are based on firmware version so you must check this first.

qnap failed to recover raid group

Also be sure that you only type right commands You can copy these commands and right click on on putty to paste. One last thing, this is not Qnap global offical website and you can always request help from your local Qnap tech departman or offical global Qnap support team www.

We can fix this kind of cases less than 10 minutes. See output of dmesg command below. Your email address will not be published. Notify me of follow-up comments by email. Notify me of new posts by email. What Is Sys. Qnap Advanced Support. Skip to content. What Should I do? How to Recover Data? Dont Start Installation!

And then plug out all HDDs. Power on the NAS. When system is ready, connect and login the NAS by using ssh with admin account. Plug in all HDDs one by one. VN:F [1. Hi; Commands are based on firmware version so you must check this first. Also be sure that you only type right commands You can copy these commands and right click on on putty to paste One last thing, this is not Qnap global offical website and you can always request help from your local Qnap tech departman or offical global Qnap support team www.

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qnap failed to recover raid group

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How To Fix / Mount RAID After 4.1.0 Firmware

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Recovering a RAID Group

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