SAS 电脑 RAID 手柄卡

Learn More About SAS Internal Interface RAID Controller Cards

RAID control cards help to manage the hard drives on your computer or server. SAS hard drives are used in enterprise operations, and when selecting a RAID controller, you select one compatible with your particular SAS format. SAS internal interface RAID controller cards can either be hardware or software, and there are different styles to choose from.

• SAS: This type stands for Serial Attached SCSI (Small Computer System Interface). SAS comes in two-speed formats of 10k and 15k and is used for enterprise uses where high speed and data availability is needed. The length of SAS cables can be up to 10 meters in length, and it uses the cable to power and transfer data. SAS drives are typically 900GB or less.
• SATA: This type of setup uses a 7.2K format for most of the SATA drives. SATA arrays are used primarily on desktop computers and can have common capacity sizes of 8TB or less per drive. The cables range from one meter or less and use separate cables for power and data. This type is used when a large amount of storage space is needed for an organization.

• Motherboard information: Review information on your motherboard to see what slots are available. Some available slots for a controller card include PCI and PCI Express (PCIe). There are also mini-slots of these available along with AGP.
• Select a brand: You can choose from brands like LSI, Supermicro, Adaptec, and other brands that are available. You can also choose from unbranded and generic options.
• Choose a number of ports: Determine how many drives will be used in the SAS RAID system. This will determine the number of ports needed by a single controller.
• Select a processor and memory: a RAID controller will have its processor and memory built into the card to handle RAID processing.

There are MegaRAID controller cards, MegaRAID SAS controller cards, and RocketRAID cards. Some come with SAS expanders and internal connectors. Here is a further breakdown:

• RAID 0: This configuration combines multiple disks. This allows the workload to be divided among the various disks.
• RAID 1: RAID 1 is a configuration that uses hard disk mirroring. This design will use at minimum two disks where the second drive is an exact copy of the first drive.
• RAID 5: This RAID level is a configuration used in business and enterprise servers. This type uses three or more disks and can initiate a hot swap if needed during a drive failure.
• RAID 6: This RAID level works similarly to RAID 5 with an added parity block. This type requires three disks and is capable of still operating if one of the three drives fails until a replacement is installed.
• RAID 10: This type of RAID level setup combines the features of RAID 0 and 1. This level requires a minimum of four hard disks and is designed for use by servers that need the capability to perform many write operations.