NAS network storage products have been serving high-end enterprises before. With the development of communication technology, they are increasingly favored by many small and medium-sized enterprises. The early data storage was mostly attached to the subsystem under the file server. However, with the popularity of the network and the large increase in data, this traditional architecture has been unable to flexibly and rapidly expand the storage space. Too much data is transmitted through the file server at the same time. Transmission also causes serious bottlenecks on the network, resulting in a significant drop in server and network performance. Network Attached Storage, a network storage device that provides fast, stable, easy-to-manage, and sufficient storage at an affordable price, has naturally become a rising star in the storage and backup industry.
NAS storage uses hardware-based RAID technology to ensure secure data storage. From the RAID level, RAID0, 1 and 5 are the most used. Most users choose the RAID5 level if there are more than 3 hard drives on a NAS storage. Recently, Darth Technology received a case of RIAD5 fault data recovery for this storage.
Media information:
The storage is a commercial-grade 4-bay network storage of Seagate, with a single disk of 3TB, a hard disk model of ST3000DM001, and four hard disks forming a RAID5 structure.
Fault description:
Two of the hard disk failures of this raid5 caused the network volume to be inaccessible. After the fault occurs, the user tried to replace the slot of the hard disk. The restarted machine still cannot be connected, and finally the RAID is reconfigured.
Data recovery process:
The Darth data recovery engineer took out four hard disks for testing. Without physical damage, the hooks reached the dedicated data recovery machine, analyzed the underlying data structure of the four hard disks, and then virtualized the data through professional programs, and finally extracted the data. verification. After verification by the customer, the data is 100% restored.
Data recovery results: 100% recovery
Advice to customers:
When storage fails, especially server storage, remember not to do some unpredictable attempts. These dangerous operations are likely to cause catastrophic damage to the data. In severe cases, data will be permanently lost. There are two very dangerous operations in this case. The first is to take the hard disk out of the swap slot, and the second is to perform RAID reconfiguration. Fortunately, the power is turned off immediately when the swap slot is powered up, and there is no data reconstruction process (generally this process is automatic, no manual intervention is required), and after reconfiguring RAID, Only the RAID information of the header is modified, and the data area is not affected. So lucky, we can guarantee the complete recovery of the data. For the significant data, we can't stop the lucky time. When encountering the fault, calmly deal with it. You can consult the professional data recovery company first. Under the guidance, you can carry out the corresponding scene. Protection tools and subsequent data recovery efforts.
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