Hitachi mixes SATA, FC drives

Posted on June 29, 2004

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Adds compliance features

By Heidi Biggar

This month, Hitachi Data Systems began offering an "intermix" drive option for its Thunder 9500 V Series disk arrays that allows users to mix Serial ATA (SATA) and Fibre Channel disk drives in a single array. Analysts expect similar announcements from a variety of vendors over the coming months as SATA drives continue to play an increasingly central role in both backup/recovery and compliance-related applications.

"We're specifically targeting fixed-content applications that require a high level of data protection but have a low duty cycle," says Scott Genereux, vice president of global marketing and business development at Hitachi. Target applications include e-mail archiving, disk-based backup, and digital archiving in industries such as broadcasting and medical.

Additionally, recognizing users' need to secure data for regulatory compliance purposes, Hitachi also announced support for its LDEV Guard data retention utility. This utility provides disk-based write-once, read-many (WORM) capability, ensuring that data written to 9500 series arrays is non-erasable and non-rewritable for user-defined periods of time.

Hitachi claims that its LDEV feature can do much of the same things as EMC's Centera but without the overhead. "Customers like this concept because it allows them to [comply with regulatory requirements] using existing arrays. They take their current Hitachi disk arrays, partition them, and run the same software they're already using."

"I like the Hitachi approach [LDEV] to retention," says John Webster, president and founder of the Data Mobility Group research firm. "It's built on open standards [and] it's not a proprietary API."

Hitachi's intermix option allows users to integrate lower-cost SATA drives into existing 9530, 9570, and 9585 arrays alongside higher-cost, higher-performance Fibre Channel drives for "in-a-box" tiered storage. This combination allows users to better match data/business requirements to storage resources for potentially significant cost savings. For example, fixed-content data (i.e., data that doesn't change over time) can be stored on SATA drives, while frequently accessed data is stored on Fibre Channel drives.

Users can store up to 107TB in a single system using SATA drives. The company uses SATA drives from Hitachi Global Storage Technologies, the company's disk drive division.

Support for the SATA drive option and tiered architecture is already included in Hitachi's HiCommand Storage Services Manager (HSSM) software. "If a user has already invested in HSSM, all he/she has to do is activate [the functionality]," says Genereux.

Genereux says that the 9500 series arrays include basic management software, but HSSM is needed for the automated tiered storage capability.

Also, recognizing that ATA technology was originally developed for desktop applications, Hitachi has added three features that it claims improve the drives' overall reliability and performance: read verification after each write, reduced rebuild times, and a controller for each drive.

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