Feeds

Two new LTO tape gens announced

Capacity boost flaunted

5 things you didn’t know about cloud backup

The Linear Tape Open Consortium has announced two more LTO tape generations, taking capacity up to 32TB compressed with LTO-8.

It has achieved this with an increased compression history buffer. It says that testing shows this can improve compression rates from the existing 2:1 to 2.5:1. Consequently raw tape capacities grow less than compressed capacities with the generations.

LTO-5, the current generation, offers 1.4TB raw and 3TB compressed. The coming LTO-6 has had its capacity for compressed data increased with the expanded compression history buffer, and it will now offer 3.2TB raw and 8TB compressed capacity.

LTO-7 will offer 6.4TB raw and 16TB compressed, with LTO-8 capping the family at 12.8TB raw and 32TB compressed.

Data rates will also increase, with the larger compression history buffer increasing the compressed data rate faster than the native data rate. LTO-5 offers up to - all these numbers are "up to" - 140MB/sec (280MB/sec compressed) with LTO-6 delivering 210MB/sec (525MB/sec compressed). The LTO-7 numbers are 315MB/sec native and 788MB/sec compressed with LTO-8 doing 472MB/sec native and 1.18GB/sec compressed.

The arrival dates of the new formats are not predicted by the LTO Consortium. If we apply a 2.5-years-between-generations rule of thumb starting from LTO-5 now, we get LTO-6 in late 2012, LTO-7 in early 2015, and LTO-8 in late 2017.

Nothing has been said about increasing tape media length or upping tape's speed through the read/write heads, so it looks as if the increased native capacity and I/O rate are going to come from having more tracks and/or smaller bits on the media. The media manufacturers must have agreed that they can develop the media to these levels so we're all headed for whacking great tape capacities.

Existing and happy LTO customers and product suppliers can relax, content that they won't run out of capacity for the next seven years or so. By 2015 it should be much clearer how disk storage of backup and archive data, either in customers' premises or the cloud, is affecting tape data storage usage, and the LTO consortium members - HP, IBM and Quantum - can form a view about whether even more LTO generations are needed. ®

Build a business case: developing custom apps

More from The Register

next story
Microsoft: Azure isn't ready for biz-critical apps … yet
Microsoft will move its own IT to the cloud to avoid $200m server bill
Shoot-em-up: Sony Online Entertainment hit by 'large scale DDoS attack'
Games disrupted as firm struggles to control network
Silicon Valley jolted by magnitude 6.1 quake – its biggest in 25 years
Did the earth move for you at VMworld – oh, OK. It just did. A lot
VMware's high-wire balancing act: EVO might drag us ALL down
Get it right, EMC, or there'll be STORAGE CIVIL WAR. Mark my words
Forrester says it's time to give up on physical storage arrays
The physical/virtual storage tipping point may just have arrived
VMware vaporises vCHS hybrid cloud service
AnD yEt mOre cRazy cAps to dEal wIth
prev story

Whitepapers

A new approach to endpoint data protection
What is the best way to ensure comprehensive visibility, management, and control of information on both company-owned and employee-owned devices?
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.
Maximize storage efficiency across the enterprise
The HP StoreOnce backup solution offers highly flexible, centrally managed, and highly efficient data protection for any enterprise.
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.
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.