IDE vs. SCSI

Updated: 01/24/2018 by Computer Hope

Today, the majority of computers users are switching from IDE and SCSI to SATA disk drives. However, for users trying to decide between IDE (ATA) and SCSI review the below chart for pros and cons on each.

Topic ATA/IDE SCSI
Cost Overall, IDE is a much cheaper solution. When compared with IDE, SCSI is often more expensive to implement and support.
Expansion IDE/EIDE allows 2 two devices per channel. Most computers have 2 channels. SCSI is capable of supporting up to 7 or 15 devices.
Ease IDE is commonly a much easier product to setup than SCSI. Configuring SCSI can be more difficult for most users when compared to IDE.
Faster Today, the latest IDE and SCSI drives running at the same RPM are very close. However, 10,000+ RPM drives are often only available for SCSI. All the fastest drives are almost always available for SCSI first and in many cases 10,000+ RPM hard drives are only available as SCSI drives.
Resources All motherboards today have an ATA/IDE interface and unless additional drives are needed no additional resources need to be taken. Unlike IDE, SCSI requires an interface expansion card in most cases (unless the motherboard already has it). Adding any new hardware means more system resources are going to be required.

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