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scasi

By nidhi05 ·
What is the advantage of Scasi cards over PCI and ISA cards and what is raid controller on whatisthe function of raid controller and scsi controller?
please give me a detalied discribtions

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scasi

by JimBb In reply to scasi

You're mixing up a few things. SCSI is a way to talk to mass storage devices. PCI and ISA are ways to connect your PC to an expansion card, and a SCSI controller can be one of those expansion cards.

Currently there are 3 major ways of connecting mass storage devices to your computer.
-IDE is the simplest. A controller can control 2 devices, usually hard disks or CDROMS, so with two controllers you can have no more than 4 devices.
-SCSI is a lot more advanced. It can control up to 7 devices per controller (or more, depending on the precise SCSI-type), usually disks, tapes or CD drives.
-A RAID controller can be IDE or SCSI, though most of the times it will be SCSI. The abbreviation stands for Redundant Array of Inexpensive Disks. You combine several disks, and present it to the OS as one big logical disk. A RAID system is more expensive than a simple SCSI controller, but has a lot of advantages, that (in my opinion) should be used in every decent server.

-Redundant, because (depending on the RAID "level" you select) a disk can fail without causing data loss. Once the defective disk is replaced, the system can rebuild the data that used to be on the defective one. Everything can happen "on line", so without any down time for the users.
-Array, which means your disks are used simultaneously (=higher throughput), but also that your OS doesn't see 7 individual disks, but one big one.

Jim

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scasi

by nidhi05 In reply to scasi

The question was auto-closed by TechRepublic

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scasi

by Curacao_Dejavu In reply to scasi

go to whatis.com
you will find a description of all it related terms.

Leopold

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scasi

by nidhi05 In reply to scasi

The question was auto-closed by TechRepublic

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by nidhi05 In reply to scasi

This question was auto closed due to inactivity

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