Shulou(Shulou.com)06/02 Report--

For IT administrators, it is always a headache to encounter raid data disasters, and data recovery engineers are the main personnel of raid recovery. However, the misoperation of administrators has a vital responsibility for the possibility of raid recovery, so what can administrators do to improve the success rate of raid5 data recovery? To sum up, it is as follows:

1. Do not go online forcibly after the server hard drive fails

two。 Protect the first scene.

3. Select a professional data recovery company

Do not go online forcibly after the server hard drive fails

When one of the hard drives of the server fails, the general server will have an Offline indicator indicating that the user is required to replace the same hard disk in good condition and recheck the algorithm. In theory, this is a very normal operation process, but do not realize that many RAID disasters are caused by this.

Take a RAID5 disk array with a large number of hard drives as an example, it is likely that several of the multiple hard drives purchased at the same time have become unstable. The server's Offline prompt may not be the most accurate, often misreporting (there are also factors of disk instability) or omitting other hard drives that are also potentially dangerous. In the seemingly ordinary forced online process, the hard drive requires a lot of read and write operations, which is a severe test: if you are lucky, you will pass smoothly, while bad luck will cause other hard drives to suddenly drop offline. this makes the problem even more thorny.

Of course, when there is a hard disk drop prompt, or a drop prompt within the fault tolerance range of RAID, forcing online is still a must. But before taking this step, it is strongly recommended that you check the stability of each hard drive, so that it is safer. We should not ignore such a small detail, often this step can keep the RAID server from paralysis.

Protect the first scene.

For manufacturers, all warranty commitments are limited to hardware equipment, that is, the data crisis caused by disk array failure has nothing to do with it, and it is considered "due diligence" to be responsible for user replacement or maintenance. But what users need is not to retrieve the hard drive or rebuild the RAID, but more valuable data. If you look for the whole machine manufacturer, it is tantamount to "asking for trouble" at this time, because the so-called after-sales service does not start from the original needs of users at all, and data is sacrificed to ensure that the hardware equipment is intact as soon as possible. Of course, well-known brands of server manufacturers or agents will take the initiative to choose to "foot the bill" for major customers' RAID data recovery service fees, but this is only an isolated case.

According to the engineer in charge of the data recovery center, cases of complete destruction of the final data due to the repair of the after-sales service engineer of the data recovery center occur almost every week. After all, after-sales service engineers are basically biased towards hardware, while RAID data recovery is based on software operations.

In addition, even simple verification operations may cause inconvenience to later data recovery. Take the ordinary RAID5 recovery as an example, when the hard disk damage exceeds the fault tolerance, the image of the damaged hard disk must be completely extracted before the final recovery can be carried out. If the hard disk is energized frequently, it is easy to cause further fatigue damage to the magnetic head, or even scratch the disk. The correct way to deal with it is to consult the professional data recovery service provider immediately.

Select a professional data recovery center

According to the statistics of the data recovery center, many cases of data recovery failure are due to users seeking incorrect solutions. Server users rely on after-sales service is often not professional, RAID disk array problems easily choose to rebuild, data loss is even worse. When choosing a data recovery service provider, it is a feasible shortcut according to the scale and the reputation of the industry. Company size, technical level and engineer team are all important indicators that need to be considered, which can help users who encounter RAID data disaster to recover their data in time and recover their losses.

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