Feeds

WD stage whispers up new AV surveillance drive

Best-in-class reliability? Hmm

Maximizing your infrastructure through virtualization

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 Power of One eBook: Top reasons to choose HP BladeSystem

More from The Register

next story
Sysadmin Day 2014: Quick, there's still time to get the beers in
He walked over the broken glass, killed the thugs... and er... reconnected the cables*
Auntie remains MYSTIFIED by that weekend BBC iPlayer and website outage
Still doing 'forensics' on the caching layer – Beeb digi wonk
SHOCK and AWS: The fall of Amazon's deflationary cloud
Just as Jeff Bezos did to books and CDs, Amazon's rivals are now doing to it
VVOL update: Are any vendors NOT leaping into bed with VMware?
It's not yet been released but everyone thinks it's the dog's danglies
BlackBerry: Toss the server, mate... BES is in the CLOUD now
BlackBerry Enterprise Services takes aim at SMEs - but there's a catch
The triumph of VVOL: Everyone's jumping into bed with VMware
'Bandwagon'? Yes, we're on it and so what, say big dogs
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.
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.
Application security programs and practises
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
How modern custom applications can spur business growth
Learn how to create, deploy and manage custom applications without consuming or expanding the need for scarce, expensive IT resources.
Securing Web Applications Made Simple and Scalable
Learn how automated security testing can provide a simple and scalable way to protect your web applications.