NAS network storage products have been serving high-end enterprises before. With the development of communication technology, they are also increasingly favored by many small and medium-sized enterprises. In the early days, most of the data storage was dependent on the subsystem attached to the file server, but with the popularity of the network and the large increase in data, this traditional architecture has been unable to flexibly and quickly expand the storage space. Transmission also caused serious bottlenecks on the network, resulting in a significant drop in server and network performance. The NAS, which provides fast, stable, easy-to-manage, and sufficient storage space at affordable prices, NAS Network Storage (Network Attached Storage) has naturally become a rising star in the storage and backup industry.
The RAID technology based on hardware control is adopted in NAS storage to ensure the safe storage of data. From the perspective of RAID level, RAID 0, 1, and 5 are the most used. If there are more than 3 hard drives in a NAS storage, most users choose RAID5 level. Recently, Darth Technology has received a case of RIAD5 failure of the storage.
The storage is a commercial-grade 4-disk network storage from Seagate. The single disk is 3TB. The hard disk model is ST3000DM001. The four hard disks form a RAID5 structure. The failure of two hard disks makes the network volume inaccessible. After the failure, the user tried to replace the hard disk slot, and the machine was still unable to mount after restarting. Finally, RAID was reconfigured.
Take out the four hard disks for testing, there is no physical damage, connect to the dedicated data recovery machine, analyze the underlying data structure of the four hard disks, and then conduct virtual reorganization of the data through a professional program, and finally extract the data and verify it. After verification by the customer, the data is 100% recovered.
Suggestion: When the storage fails, especially the server storage, do n’t try to do some uncertain work without authorization. These dangerous operations are likely to cause catastrophic damage to the data, and in serious cases will cause permanent Lost. There are two very dangerous operations in this case. The first is to remove the hard drive from the swap slot, and the second is to perform RAID reconfiguration. Fortunately, the power was immediately turned off when the swap slot was powered on without success, and the data reconstruction process was not performed (generally this process is automatic and no manual intervention is required). Only the RAID information of the header is modified, and the data area is not affected. Only by being so lucky can we ensure the complete recovery of the data. For the data of great significance, we ca n’t block this lucky time. When we encounter a failure, we can deal with it calmly. We can first consult a professional data recovery company and carry out the corresponding site under the guidance. Protection tools and subsequent data recovery work.
About Darth Data Recovery and Forensics Center
Darth Science and Technology, a national high-tech enterprise, the only cooperative unit of Tianjin State Secrets Bureau's secret carrier data recovery, a project undertaker of the sensitive information inspection system project of commonly used office equipment storage components of the State Secrets Bureau, a well-known brand in the data recovery and forensics industry, in Domestic and even Asia's leading data recovery technology! The full name of Darth Technology is Darth Carey Technology (Beijing) Co., Ltd., established in August 2007 with a registered capital of 15 million yuan. Darth Technology is a national high-tech enterprise with data recovery and forensic technology research and development as the core. The company has more than 30 data recovery and forensics software with independent intellectual property rights. The company has R & D center, data recovery and forensics service department, server RAID data recovery emergency center, etc.
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