Showing posts from August, 2020

How to Create and configure RAID?

Hot Swap:-   Hot swap is the replacement of hard disk. If hard disk got faulty then   You can easily replace hard disk in running environment without stopping , shutting down, or rebooting the server. It is plug & Play device. IDE:- IDE Stands for Integrated Device Electronics. It is commonly known as ATA or PATA (Parallel ATA). It was first developed by Western Digital and Compaq in 1986 for compatible Hard Drive for IBM Computers. It can run 5800 and upto 7200 rpm & transfer rates of 16.7 Mbps.   SATA:- SATA Stands for "Serial Advance Technology Attachment". SATA is a computer bus interface that connects host bus adapters to mass storage devices such as hard disk drives, optical drives, and solid-state drives. SATA transfer rates is high rather than IDE.   SCSI:-   SCSI stands for "Small Computer System Interface". SCSI is most commonly used for hard disk drives & tape drives but SCSI can connect a wide range of other devices. SCSI is a s

What is RAID in Linux?

 Definition of  RAID:- >> RAID stands for " Redundant Array of Independent Disks" or "Redundant Array of Inexpensive Disks". >> RAID allows you to use multiple physical hard drives into a single logical hard drive. >>   It is a process which is used to store data in parity form. >> There are two types of RAID- Hardware RAID and Software RAID. Hardware RAID:-            Hardware RAID is a physical storage device which is built from multiple hard disks. While connecting with system all disks appears as a single SCSI disk in system. From system points of view there is no difference between a regular SCSI disk and a Hardware RAID device. System can use hardware RAID device as a single SCSI disk. Hardware RAID has its own independent disk subsystem and resources. It does not use any resources from system such as power, RAM and CPU. Hardware RAID does not put any extra load in system. Since it has its own dedicate resources, it provides

Free education and interview preparation website

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