When we start to talk about the data security, it is quite significant beyond any doubts that you back up previously and retrieve data after accidental emergency. There happens to be a gradually process that the whole data recovery industry has to confront: a transition which converts from the data retrieving for PC HDD including its relevant devices like Flash memory, into the integrated data safety solution applying in the server domain.

Servers nowadays play quite an important role in people’s daily work. Not limited to the large and medium sized enterprises, even those small companies will require constructing their own server sides to support increasing demand of data storage. Server similar to PC in one sense is architecture of computers based on Intel Processor, their interfaces such as IDE, PCI are in common on the other hand. But SCSI/SAS hard drives that utilized within server system plus featuring multi-CPU-sustainable majorly distinguish server from PC, moreover make it outstanding by its high reliability under the condition of multi users and multi tasks. Here comes the weakness we can never omit that server runs itself ongoing 7 days 24hours!

The reason why we name it a server, no matter a data base server or one ordinary file server, is that it features the function of bulk storage- various of fatal information such as company’s private files, customers’ data, crucial technique files involved in the research and development. The core for a server’s normal operation as well as corporation constructing its LAN is attributed to the server data safety. Can you imagine how huge the disaster would be for the enterprises in case of the data damage or even worse of data loss?

Anyway regarding to latter one’s complicated art, it requires more technical means, more advanced tools and more time to recover the data. It is believed as a trend for data recovery industry gradually to achieve so, just a matter a time.

As we mentioned before, the mainstream hard drive interfaces are SCSI and SAS in the market of server territory.

SCSI, which defines in Small Computer System Interface, is a set of standards for physically connecting and transferring data between computers and peripheral devices. SCSI is most commonly used for hard disks and tape drives, it can connect and manipulate a wide range of other devices, including scanners and CD drives. It distributes appropriately and accomplishes dynamically those simultaneous tasks requested by the system at a time.
SCSI is an intelligent, peripheral, buffered, peer to peer interface. It hides the complexity of physical format. Every device attaches to the SCSI bus in a similar manner. Up to 8 or 16 devices can be attached to a single bus. By virtue of its low CPU occupancy rate, high efficiency of multi tasks manipulation, long distance of connection to multi devices, SCSI standard is highly pragmatic and addressed toward server requirements.

Serial Attached SCSI (SAS) is a computer bus used to move data to and from computer storage devices such as hard drives and tape drives. Besides combining the advantages of SATA with SCSI which enhances the performance, SAS depends on a point-to-point serial protocol that replaces the parallel SCSI bus technology and it uses the standard SCSI command set ensuring the data transmission and access. Moreover, SAS interface reduces the cost of RAID, increase the stability of transmission as well as better backwards-compatibility with second-generation SATA drives.

Compared to SCSI, SAS interface is more often applied to configure the server since its transmission speed reaches from 3GB per second up to 6GB/second then to 12GB/second. The trend of hard drive interface in server storage is SAS, which not only provides high-speed and low-delay connection but also develops to big scale configuration. This kind of server storage can also become the standard configuration that is used for internal hard drive connection of specialized storage system.

Hard drive as the storage component inside the server is usually one kind of sophisticated and accurate electronic device. Whether within newest SATA interface or IDE interface or even the high-end SCSI/SAS interface, server hardware drive due to its platters’ high rotation speed that reaches up to over 10 thousands of times per second can be resulted in physical problems by tiny little fractures. Meanwhile, operation with wrong methods such as delete by accidental, mistake cloning etc may lead to data loss as well. Damages caused by natural calamities are also under the unpredictable manners that bring out serious consequences.

The existing data recovery means to the servers on the market are basically partial ones regarding to the RAID recovery or recovery for SQL data base. They can be only defined as software level recovery in the view of its simplex and partial solutions. For the whole industry, it desires one professional solution to handle server data safety. So far as we know, SDII launched by SalvationDATA is one kind of integrated solution purportedly to solve various kinds of server problems. Therefore it needs testify to prove its advantages or weakness. But actually it is quite a new concept proposed to meet such new demand for the whole industry.