When a hard disk of the server fails, the general server will be prompted by an off-line indicator light. At this time, the user needs to replace a good hard disk and re-check the algorithm. It is reasonable to say that this is a normal operation process, but I don't know that many RAID disasters are caused by this.
Take the data recovery of a RAID5 hard disk array with a large number of hard disks as an example, it is likely that several hard disks purchased at the same time have become unstable. However, the offline prompt of the server may not be the most accurate, and it often gives false positives (also because the hard disk is unstable) or misses other hard disks with hidden dangers. In the seemingly ordinary forced online process, the hard disk needs a lot of reading and writing operations. At this time, it is a severe test: if you are lucky, you will naturally pass smoothly. If you are unlucky, other hard disks will suddenly disconnect from the network, and the problem will be even more difficult.
Of course, there is a hard disk disconnection prompt, or a disconnection prompt within the RAID fault tolerance range, and forced online is still a necessary operation. But before this step, it is strongly recommended to check the stability of each hard disk, which is safer. Don't ignore such a small detail, often this step can save the RAID server from paralysis.
2. The key to data security: Do nothing?
As far as the manufacturer is concerned, all warranty commitments are limited to hardware equipment, which means that the data security crisis caused by the failure of hard disk array has nothing to do with it, and the user responsible for replacement or maintenance is considered as "due diligence". But what users need is not hard disk retrieval or RAID reconstruction, but "unrepeatable" data. If you look for a complete machine manufacturer, it is tantamount to "asking for trouble" at this time, because the so-called after-sales service is not based on the original needs of users, ensuring that hardware equipment is in good condition as soon as possible, but sacrificing data. Of course, well-known brand server manufacturers or agents will actively choose to "pay the bill" for the RAID array data recovery service fee of large customers, but this is only an individual case.
According to reports, because the after-sales service engineer of the service provider is looking for maintenance, the case that the final data is completely destroyed will happen almost every week. After all, the after-sales service engineers are basically biased towards the hardware itself, and the data recovery of RAID arrays based on software operations is also slightly insufficient.
In addition, even a simple verification operation may bring inconvenience to the later recovery of array data. Take the data recovery of ordinary RAID5 hard disk array as an example. When the hard disk damage exceeds the fault tolerance, the mirror image of the damaged hard disk must be completely extracted before the final array data recovery can be carried out. If the hard disk is powered on frequently, it is easy to cause further fatigue damage of the magnetic head and even scratch the disk. Faced with this data security problem, the correct solution should be to consult a professional data recovery service provider immediately.
3. Shortcut of hard disk array data recovery: Seek the help of professional data recovery service providers.
According to relevant data, many cases of data recovery failure are due to incorrect solutions adopted by users. For example, after-sales service of some servers, it is easy for them to choose reconstruction when dealing with this kind of array data recovery cases, resulting in serious data loss, which is also a problem that enterprise data security managers should pay attention to when facing the data recovery of major server arrays.
In addition, when choosing a data recovery service provider, it is a feasible shortcut to judge according to the scale and industry reputation. For example, Efficiency Source (International) Technology, with franchisees' service outlets all over the country, has accumulated a lot, which can help users suffering from RAID array data disasters to tide over the difficulties in time, and professional data recovery personnel can recover the data of the server hard disk array.