HP Serial ATA (SATA) Entry (ETY) and Midline (MDL) hard drives

HP Entry and Midline SATA drives are the highest capacity, best price advantaged drives designed with economical reliability and performance.		Product information » Overview & Features » Key benefits » Questions & Answers

	Entry SATA drives offer customers the lowest acquisition cost, features include the following:

• Economical Reliability: Reliability for non-mission critical entry server environments, appropriate for <40% workload
• Economical Performance: Native Command Queuing (NCQ) to increase performance of SATA hard disks by optimizing the order in which received read and write commands are executed
• Data Protection: Buffer Error Detection is used to protect the data in the drive buffer via parity or ECC
• Time Limited Error Recovery (TLER): TLER purposely constrains the drive to report the error as soon as possible within 5 seconds vs. unlimited retries
• Warranty: Ships with a standard one year warranty

	Midline SATA offers customers the lowest $/GB drives and increased features over Entry SATA

• Reliability: Increased reliability of approximately two times Entry drive reliability based on <40% workload
• Workload Management: Detects a specific temperature threshold, drive throttles performance to protect itself
• Rotational Vibration Sensors: Improved rotational vibration robustness for immunity to environmental rotational affects
• Additional features: Native Command Queuing (NCQ), Buffer Error Detection, Time Limited Error Recovery (TLER), Microcode Download and 3Gb/s compatibilty
• Warranty: Ship with a standard one year warranty

	SATA Applications

• Appropriate SATA Applications: With the attractive low acquisition cost and high capacity points of SATA drives it is important to understand the appropriate applications where SATA drives should be used. Proper usage (IE <40% workload) of these drives will lessen the probability of drive failure.
• Greater than 40% Workload Applications: For high IOP's performance intense applications, mission critical applications or extreme environments HP recommends Enterprise Serial Attached SCSI (SAS) hard drives.