Feeds

Is DAS the storage comeback kid?

LSI scents resurgence

The Essential Guide to IT Transformation

Striking a note contrary to convergence and shared storage conventional wisdom, LSI is seeing signs of a resurgence in direct-attached storage.

The prevailing idea is that server proliferation and virtualisation in data centres is strengthening the need for consolidated and shared data storage, either network-attched storage (NAS) for files or block-oriented storage area networks (SANs).

LSI's Robin Wagner, senior director for storage in its components division, says that SAS and small form factor drives are beginning to change that. The evidence is anecdotal and based on LSI shipping more than 13 million SAS integrated circuit (ICs) to its customers for use mostly on servers. LSI has also shipped more than five million SAS RAID stacks, MegaRAID, etc, solely for use on servers. It's looking forward to shipping faster 6Gbit/s SAS ICs towards the end of this year.

Harry Mason, LSI's director of industry marketing, said it's not that LSI's server-oriented SAS IC shipments are growing faster than its Engenio SAS controller storage array business into the SAN and NAS markets. They are growing too and there's no evidence that server SAS is replacing networked array SAS.

The scenario that Wagner and Mason are painting is one where virtualised servers, along with blade servers, can now have a lot of direct-attach, fast-access, SAS storage, particularly with 2.5-inch small form factor drives. SAS zoning, which enables the splitting up of a pool of DAS storage and its mapping to applications helps. The SAS-controller storage can be split up and mapped to individual VMs so that there is consolidated storage for the virtual machines.

They say this is an entry-level virtualised and/or bladed server thing. For more substantial server environments, and to support the movement of VMs and their stored data between physical as well as virtual servers then networked storage will be needed. HP, with its LeftHand Networks software, can take grouped servers' DAS and turn it into a SAN which will suit many SMEs. It pushes the crossover point between DAS and networked storage higher. ®

The Essential Guide to IT Transformation

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
Microsoft says 'weird things' can happen during Windows Server 2003 migrations
Fix coming for bug that makes Kerberos croak when you run two domain controllers
Cisco says network virtualisation won't pay off everywhere
Another sign of strain in the Borg/VMware relationship?
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
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.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.
The Essential Guide to IT Transformation
ServiceNow discusses three IT transformations that can help CIO's automate IT services to transform IT and the enterprise.
Maximize storage efficiency across the enterprise
The HP StoreOnce backup solution offers highly flexible, centrally managed, and highly efficient data protection for any enterprise.