Articles about raid

Doomsday clock

Super-slow RAID rebuilds: Gone in a flash?

Analysis RAID rebuilds are too slow with 4, 6 and 8 and 10TB drives. So erasure coding is coming in to shorten the failed disk data rebuild time and also use less capacity overhead. What happens when SSDs are used instead of disk drives? Will RAID be more or less acceptable than with disk drives? Intuitively we expect a flash array to …
Chris Mellor, 13 May 2016
Cartoon - Private SNAFU

Cisco shipped UCS servers with rotten RAID settings

If you've been wondering about the server performance in your Cisco Business Edition 6000/7000 telephony system, wonder no more: The Borg has issued a field notice that the system shipped with misconfigured RAID. The Cisco field notice advises sysadmins that the correct settings for the kit are as follows: Read Ahead Policy …

Flash banishes the spectre of the unrecoverable data error

Those who follow storage developments know that there are concerns about the viability of RAID systems. Rebuild times are so long that the chances of an unrecoverable read error (URE) occurring are dangerously high. What is true for traditional disk, however, is not necessarily true for flash. Now that traditional magnetic …
Trevor Pott, 7 May 2015
hitahi t7k500 hard disk drive

Boffin finds formula for four-year-five-nines disk arrays

Forty-five disk drives, ten parity drives, and 33 spare disks: that's the optimum array size to protect data for four years with no service visits, according to a study published at Arxiv. The problem the study addresses is that the world's rush towards hyperscale data centres puts an awful lot of disks in one place, and the …
Tad_HUnt_climber

Hunt the RAID killer: Exablox builds object storage that isn't

Exablox was cofounded by a video-making, rock-climbing CTO intent on killing RAID. El Reg got a closer look at Exablox by attending a press tour at its HQ last week and looking deeper into its object storage-based filer. Co-founder and CTO Tad Hunt explained that he became frustrated with filer performance while taking time …
Chris Mellor, 9 Dec 2014
PAS16 enclosure

Panasas: Avoid lengthy RAID re-builds - use our dodgy-file tart-up tech

Storage biz Panasas has unveiled boosted hardware and software – and attacked the RAID rebuild problem by rebuilding damaged files instead of complete disks. The company is an HPC storage system supplier which is moving into technical computing/big data use cases in enterprises. It has more than 450 customers in 50+ countries …
Chris Mellor, 12 Jun 2014
Samsung 500GB SpinPoint 2.5in HDD

Traditional RAID is outdated and dying on its feet

HPC blog The video below is an interview I did with IBM storage guru Robert Murphy at SC13 in Denver. I’m still in catch-up mode after my recent near-disastrous rootkit episode. Youtube Video In the video, Robert and I talk about how today’s typical RAID mechanisms (1, 5, 6, 10) just aren’t up to the job of protecting data against …
Dan Olds, 3 Mar 2014
Synology RS3614xs+

SME storage challengers emerge one feature at a time

Sysadmin Blog The storage market is in the middle of an evolution. To what, nobody knows, but a whole lot of people expect to get very rich between now and when we've got it all figured out. The only market that matters to most companies is the enterprise, because that's where the big margins are. One sales junket, lots of terabytes sold. …
Trevor Pott, 12 Feb 2014
REID index

Keeping warm in winter the el Reg way: Setting a NAS box ON FIRE

Hardware Test Hardware reviews are typically boring, tedious affairs with a fairly predictable outcome: someone sends you a minor iteration of a product and you verify that it behaves as expected. Every now and again, however, someone makes a claim so outrageous that you simply must test whether or not it's true. Such is the case with the …
WD My Cloud EX4

Bay pride: WD slips out FOUR-DRIVE network FILE STASH

WD has fixed the limited space and lack of RAID on its 1-bay My Cloud box by introducing a 4-bay one, the EX4. The first My Cloud box, providing data access to all your home/small biz network, was powered by a dual-core ARMv7 processor running Debian Linux. The single-core, 2GHz Marvell 88F6282 processor inside this new 4-bay …
Chris Mellor, 13 Nov 2013
Bittorrent logo detail

BitTorrent awarded distributed storage patent

BitTorrent has been awarded a patent for something called “Distributed storage of recoverable data”. Available here, the patent is described as “A system, method, and computer program product replace a failed node storing data relating to a portion of a data file.” The invention seems to resemble something an awful lot like …
Image by Gabriella Fabbri

The LUN must DIE. Are you with me, storage bods?

Storagebod I know people think that storagebods are often backward thinking and hidebound by tradition and there is some truth in that. But the reality is that we can’t afford to carry on like this. Demands are such that we should grasp anything which makes our lives easier. However, we need some help with both tools and education. In …
StorageBod, 8 Oct 2013

Boffins say flash disk demands new RAID designs

Solid state disks (SSDs) are wonderfully fast, but every time you write to them, the semiconductors involved degrade just a little, a property that means you swap them into established storage rigs at your peril. That's the conclusion of a new paper, “Stochastic Analysis on RAID Reliability for Solid-State Drives” from a pair …

Perish the fault! Can your storage array take a bullet AND LIVE?

Feature Storage doesn't have to be hard. It isn't really all that hard. If you ask yourself "can my storage setup lead to data loss" then you have already begun your journey. As a primer, I will attempt to demystify the major technologies in use today to solve that very problem. Certain types of storage technologies (rsync, DFSR) are …
Trevor Pott, 13 Mar 2013
Aberdeen Stirling X888

Researchers reveal radical RAID rethink

Singaporean researchers have proposed a new way to protect the integrity of data in distributed storage systems and say their “RapidRAID” system offers top protection while consuming fewer network, computing and storage array resources than other approaches. RAID – redundant arrays of inexpensive disks – has been a storage …
Sony Vaio Z

Sony outs 1080p skinny laptops

More updated Vaio laptops from Sony, this time the Z series - the latter the original Ultrabook, introduced before the MacBook Air and long before Intel coined the term. Sony Vaio Z Of course, World+Dog is making slimline notebooks now, so the new Z's 17mm thickness and 1.2kg weight are not the leading edge laptop specs they …
Tony Smith, 16 May 2012
fingers pointing at man

Windows 8 to get self-healing 'Storage Spaces'

Microsoft will introduce in Windows 8 what it calls Storage Spaces – a method of putting drives into a virtual pool from which self-healing virtual disks can be created, with some resemblance to ZFS features. Details of these virtual disks – the aforementioned Storage Spaces – were described in a 4,400-word deep-dive blog post …
Chris Mellor, 7 Jan 2012
cloud

Nasuni puts its cloud storage balls on the line

Nasuni is offering a 100 per cent uptime guarantee for data access through its cloud filer gateway appliance. Of course, it can't actually rule out service outages, so it is offering compensation for outages if the 100 per cent uptime target is breached. In his blog, Andres Rodriguez – Nasuni's CEO – says: "We have attached …
Chris Mellor, 21 Jul 2011

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