SAS Drives & Raid Controllers

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PsyKhiqZero
1. RAID uses multiple hard drives in order to keep the system running during a drive failure. RAID is done in multiple levels depending on the amount of redundancy (hdd failures before systems fails) and the performance needed from the array.

2. RAID controllers perform the necessary calculations that decide how data is stored across the drive in the array. On the flip side they also help retrieve the data from the array and rebuild the data should there be a hard drive failure in the array. They also provide the interface in which all the drives are attached.

2. SAS is variation of SATA connector that supports daisy chaining drives. This way you don't have to have 8 cables going from each drive to the RAID controller, instead...
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PsyKhiqZero

PsyKhiqZero

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Jun 1, 2008
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1. RAID uses multiple hard drives in order to keep the system running during a drive failure. RAID is done in multiple levels depending on the amount of redundancy (hdd failures before systems fails) and the performance needed from the array.

2. RAID controllers perform the necessary calculations that decide how data is stored across the drive in the array. On the flip side they also help retrieve the data from the array and rebuild the data should there be a hard drive failure in the array. They also provide the interface in which all the drives are attached.

2. SAS is variation of SATA connector that supports daisy chaining drives. This way you don't have to have 8 cables going from each drive to the RAID controller, instead you have 1 cable that attaches all the drives to the RAID controller.
 
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