Disk arrays store data
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The manager wants us to purchase a disk array to store the data from the DCS, with the data needing to be preserved for 20 years. How can this be achieved? Has anyone here done this before or heard of a way to do it?
This is knowledge specific to the IT industry. To achieve complete data security, it is necessary to have both local disaster recovery backups and off-site disaster recovery backups. In systems like financial systems, even in the event of a nuclear attack, data stored elsewhere can be used for quick restoration. But is it really necessary for chemical companies to retain data for 20 years?
You can search for disk arrays on Zhongguancun Online, and then contact vendors to discuss related technical issues
You need many things; if you have no money worries, get them all； If you’re not afraid of the hassle, consider burning it to Blu-ray discs regularly; when there’s a lot of data, searching becomes a problem, and management software also needs to be taken into account
Disk array products are very common; in the past, tape drives were used for data backup, but now disk arrays make things much easier. It’s for DCS; if you tell the supplier that it’s for industrial control systems, they will understand. The professional name for it is RAID (Redundant Arrays of Independent Disks), which stands for Redundant Arrays of Independent Disk drives. IBM, HP, Huawei, EMC, DELL, Lenovo, Inspur, and others all have such products.
Siemens industrial computers offer relevant products for this purpose, namely those that provide \"hard drive redundancy\" – with one active drive and one backup, or one active drive and two backups. The hard drives support hot swapping; if the main hard drive fails, it can be removed for repair while the backup one takes its place automatically. This process does not cause any interruptions, and no data is lost. Moreover, there is no need to open the chassis cover to insert or remove the drives, which gives it a sophisticated appearance.
A disk array consists of multiple physical disks that function as a single logical disk, aimed at meeting data security requirements such as fault tolerance and disaster prevention. It can be understood as a computer dedicated to storage management, equipped with several disk controllers (usually 2 or more) and hard drives connected to those controllers; in the event that a controller or some of the hard drives fail, they can be replaced online without any loss or damage to the data. Based on 20 years of production data, it is necessary to estimate the total amount of storage space required, and then determine how many hard drives should be used to achieve a certain level of redundancy.
There are now SAN and NAS technologies, as well as the use of disk array servers in general. Do you understand these?