Feeds

WD stage whispers up new AV surveillance drive

Best-in-class reliability? Hmm

Next gen security for virtualised datacentres

Western Digital has a new disk drive for audio-visual applications with a claimed best-in-class reliability which is far below enterprise drive reliability levels.

The target markets are surveillance camera systems, digital video recorders and other audio-visual applications.

The WD AV-25 is a 2.5-inch SATA 3Gbit/s drive with 160, 250, 320 and 500GB capacity points. It's designed for 24x7 operation and has two platters. WD says it's quiet, rated at 23bBA idle and 25dBA seek. Its mean time before failure (MTBF) is one million hours.

The drive is economic with power, drawing 0.65 watts when idle and 1.6 watts when reading or writing data.

WD says the AV-25's drive arm frequently sweeps across the disk to reduce uneven wear on the drive surface which it claims is common to audio video streaming applications.

A comparison with Hitachi GST's C5K500 surveillance drive is useful but also frustrating because some of the measurements are incomparable.

For example, HGST doesn't provide an MTBF rating for its C5K500 drive at all. Score one to WD.

By the way, an enterprise SFF drive, like Seagate's Savvio 10K.4 has a two million hour MTBF rating, double that of the AV-25, implying that A/V drives are not reliable in the enterprise sense at all.

HGST says its drive supports 600,000 load/unload cycles while WD says the AV-25 supports more than 300,000. Score one to Hitachi GST.

WD's dBA measure of sound refers to sound pressure with the number weighted for the human ear's sensitivity. HGST uses a Bel measure instead, indicating the drive's sound pressure - 2.4Bels when idle and 2.5 when seeking.

The trouble is that there is no simple conversion between dBA and Bels. Some HDD noises are more irritating than others, although both can be at the same sound pressure.

It's sometimes said that occasional head movements can be quiet but irritating, and the AD-25 drive makes these to avoid uneven wear on the platter surfaces. WD says noise levels "have been minimised to less than one sone - virtually below the threshold of human hearing". We can't find any sone measurements for the C5K500.

Basically we can't say if the AV-25 is quieter or louder than the C5K500, nor can we say if it's more or less reliable, as HGST provides no MTBF rating at all. The AV-25 certainly uses less power than the HGST drive though. It also has a 32MB cache, quadruple HGST's, and WD says it can stream 5 simultaneous HD video streams.

WD's AV-25 drive is available now at all capacity points except the 500GB one, which will be ready next month. WD's recommended street prices are $50.00 - $80.00 depending on capacity. ®

The essential guide to IT transformation

More from The Register

next story
The Return of BSOD: Does ANYONE trust Microsoft patches?
Sysadmins, you're either fighting fires or seen as incompetents now
Microsoft: Azure isn't ready for biz-critical apps … yet
Microsoft will move its own IT to the cloud to avoid $200m server bill
Oracle reveals 32-core, 10 BEEELLION-transistor SPARC M7
New chip scales to 1024 cores, 8192 threads 64 TB RAM, at speeds over 3.6GHz
US regulators OK sale of IBM's x86 server biz to Lenovo
Now all that remains is for gov't offices to ban the boxes
Object storage bods Exablox: RAID is dead, baby. RAID is dead
Bring your own disks to its object appliances
Nimble's latest mutants GORGE themselves on unlucky forerunners
Crossing Sandy Bridges without stopping for breath
prev story

Whitepapers

Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
7 Elements of Radically Simple OS Migration
Avoid the typical headaches of OS migration during your next project by learning about 7 elements of radically simple OS migration.
BYOD's dark side: Data protection
An endpoint data protection solution that adds value to the user and the organization so it can protect itself from data loss as well as leverage corporate data.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?