84 posts • joined 13 Aug 2009
Given it is a SAS drive and HGST's 600GB 10,000rpm drive is ~200GBP, then a lot lot cheaper than the equivalent 400GB or 800GB SAS 2.5" drive which for 400GB is north of 1000GBP at the moment.
Yeah SATA drives are cheaper but you don't get a dual ported interface or Data Integrity Field (DIF) 520 byte sector sizes. If you don't know why either of these might be important you are not qualified to comment.
Re: broken RAID
LSI and presumably now NetApp have patents covering that. So potentially the whole array has to go offline because just reporting a bad block on the ones with the parity errors is not possible do to patent restrictions.
Note I have personally suffered a parity error on a RAID5 rebuild on an LSI/NetApp Engenio array. It was an interesting case, involved some maths to work back from the block on the RAID array that was duff, through the LVM and then the ext3 file system to find the effected files. Able to then mark the blocks as good again in the array controlled (which left them as zeros), delete the files and restore them from tape.
Anyway don't blame Dell as that is covered by a patent.
Re: Interesting if cheap ...
GPFS native RAID is not going to be cheap because it is only an option if you buy your servers, disks and shelves from IBM who are not known for selling cheap disk arrays. Last time I looked you even had to buy IBM's racks. Plus it only really works if you want file system with your storage. If you want block storage go look elsewhere. A Dell MD3x00 will be much much cheaper and with the DDP give you all the same benefits.
The way to think of it is you take say a 4U 60 disk enclosure stuffed full of disk, but instead of doing RAID6 over a whole disk you break the disk up to say 1GB chunks and then do a 8D+2P RAID6 on the chunks which you scatter over all the disks. You then LVM treat the RAID6 chunks as PV's and throw then into a VG and carve LV's out of them. Every disk is then left with some of the 1GB chunks free, enough to cope with however many "hotspares" you specify. When a disk then fails all 59 remaining disks are involved in the rebuild of the damaged RAID6's of disk chunks. The rebuilt bits then get scattered over the remaining disks. Obviously you need to keep track so no RAID6 has more than one chunk on a single drive.
NetApp have something similar in the Engenio/SANtricity range called Dynamic Disk Pools. IBM's XIV also did something similar but using RAID1 which is a bit rubbish for storage density. Of course none of this comes into play until you have a large number of disks. As such traditional RAID is not going anywhere fast for most people.
My guess is that the real problem with a render farm hand off is the interconnect. Rendering frames for a movie is trivially parallel; each frame can be rendered utterly independent of any other frame, so while a node is rendering a frame it has no requirement to communicate with any other node, till it gets to the end when it needs to upload the frame to a central storage area. You can happily do this with gigabit ethernet.
However for a real HPC cluster that would not cut the mustard and you need high speed low latency interconnect, either Infiniband or something similar. Retrofitting this into an old system is simple madness.
Universities and campus agreements
Something not mentioned is that in the U.K. at least a University with a campus agreement (that's all of them as far as I can tell) get Office365 thrown in for free. Quite a few have given up on student email at least and stuffed it all into the cloud. Some have pushed all their email into Office365. The value proposition is very very compelling.
Re: Nice to see
So he is spending illegally gotten gains (remember Microsoft is a convicted monopolist) to rehabilitate his image and I am supposed to like him for doing that?
My personal feeling is that the Muslim bastards who are hindering the Polio eradication program in Afghanistan, Pakistan and Nigeria as some sort of Christian/Western plot are utterly evil and should all be rounded up and tortured to death for crimes against humanity.
Re: spot on...
"What would really be truly revolutionary would be for the car manufactures to agree a standard for car "entrainment" systems with an open API so tablet/phones can link in seamlessly and be controlled from the steering wheel/stalk controls whether you have Andriod, iOS, Win8m or even Blackberry via an installed app"
It already exists and guess what it is called bluetooth. Your car stereo and phone need to support the correct bluetooth profiles for it all to work, but I can assure you that when they do it does indeed work.
Re: I should say so!
Except it does not appear to have been adopted by Dell in the slightest. I have for example just downloaded a BIOS update for a PowerEdge R810 released less than two months ago.
For any large amount of data doing it in house is hugely and I mean hugely cheaper. Over a five year period 500TB in the cloud will cost over two million USD. For that sort of money you can buy the storage build a data centre and pay the staff and still have a significant amount of money left over. Then for the next five years the data centre comes free.
Then there is the simple fact that there is insufficient manufacturing capacity for flash to change the equation radically in the near future. It takes at least a couple of years to bring a fab online so capacity is known for some time ahead. Flash manufacturing capacity is only a couple of percent for hard disk capacity let alone tape.
Also where are the cloud providers going to store this data? Magic pixie dust or something?
In short neither disk or tape is going anywhere fast.
Actually I think you will find that the boiling point of water has not been 100°C for nearly 60 years now. Since 1954 it has been under standard conditions 99.9839 °C, and if you use the ITS-90 calibration it is even less at 99.974 °C. Kids of today eh.
Answer use better backup software
If you want to use joke backup software then yes you are going to be storing loads and loads of copies of the data at silly multiples. Back in the real world you could simply select better backup software, specifically TSM and ONLY store a primary and secondary copy of every version of a file and radically reduce the data retention multiple and have "virtual" backups going back to however far you want. Then if the file is a database or similar where the file changes every day, you just dedupe it.
Whoever wrote this article is either not a storage administrator, or an uninformed twit who should not be let near any storage again.
Symbian and Nokia
Personally I think Nokia should have followed a similar strategy. That is fitted a Android compatible interface to the best of class hard realtime OS Symbian. It can't have been a worse strategy than going for Windows Mobile.
Re: Obviously not for laptop drives...
Laptop drives in 24x7 and/or array operation are a massive no no in my 15 years of experience. You will only see 12-18months before they kick the bucket, 24 if you are lucky. The Hitachi 24x7 rated ones work better though they have a nasty habit of replacing failed drives with ones that are not 24x7 rated. The only reliable solution I have at the moment is to buy enterprise drives, Seagate Constellation drives seem to work well, but are 15mm deep.
Basically what has changed is we are not in a life and death fight where tens of thousands of people are dying against one of the most evil regimes in the history of mankind. The current war against terror really does not qualify.
Also anyone surprised by Tempora has a really short memory. It is not that long ago that towers where built to intercept the phone calls between ROI and the UK during the troubles.
Rubbish stats from Seagate
There are a number of 60 drives in 4U of space storage devices available from a range of vendors today that can be fitted with 4TB drives. As such this gives nothing extra in storage space, and given there is no form of RAID then the usable space offered by this system is worse than say a bunch of MD3660f/DCS3700 devices using dynamic disk pools.
The days of being able to have a list price for a 1TB SATA drive of £1500 are long gone, that is storage of spinning disks is much more mature and as a result margins are lower. Rather than tracking revenues it would be interesting to track number of shipped drive slots for example.
Assuming the prints where being handed down a long chain it is entirely reasonable for all or a large number of the prints to end up at one place, namely the end of the chain. That said these rumours have been going around for a while now, and until they are confirmed by the BBC I would take them with a bucket load of salt.
Re: Power Cuts
The other option is to very carefully select your microwave oven not to have a clock. I am resigned to having to set the time on the oven but every other clock in my house either knows how to get the time from a radio signal or is now in the bin.
Re: Aircraft designers
Photocopies do go up to A0, it is just you are not used to such machines.
Windows based HPC will be a minority sport until Microsoft sort out the licensing. It is from personal experience a total nightmare and not cheap.
Re: Common sense prevails
Not only is he a common crook, he as been that way since the early 1970's when he was selling blue box phone phreaking devices.
Re: @ David Neil Article title
Actually it is already a well known fact that Steve Jobs is a crook, he committed perjury in court by swearing in court documents that it was impossible for him to be the father of Lisa Brennan-Jobs. To give you an idea of just how serious a crime perjury is, in England and Wales it carries a maximum sentence of seven years. In the U.K. Jobs would have almost certainly served time for what he did looking at the CPS website he could have expected three years for that stunt.
Then there is the phone phreaking where he was selling blue boxes. The short of it is that there is absolutely no liable in calling Steve Jobs a crook, because he most emphatically was one. Hardly surprising then that even with huge wealth he would continue to break the law to add to his wealth.
Re: the problem with boats
Actually I think you will find that the USA is quite capable of shooting down a passenger airline, and it does not even need to be in international air space for them to do that.
Power sneaked in via earth wire
Do some Googling but it would appear that the method for the "anomolous" heat generation has been twigged. As it is all a black box you wire up a simple electrical thermal element and then use the earth wire from a normal plug that has been "specially" wired along with the socket in the wall to draw power. You then happily separate the wires out in the flex but a clamp meter over the live and measure the current/voltage and get a power draw that is less than the heat output. Meanwhile the power for the "anomolous" heat generation is being drawn down the earth wire and shares the common neutral.
Rossi has been challenged to do a test where the power levels in all three wires supplying the apparatus are measured and he has refused. I have quickly skimbled the paper and the power measurement section makes no mention of measuring the power levels in all the cores connected up.
Given Rossi's history of fraud (Google it but there is a failed thermoelectric generator using waste heat and a failed oil from waste firm) one has to take him with a very large pinch of salt.
14" ideal for older eyes
The problem with the 11" displays is that for aged parents the small screen size is an issue. Simply displaying the same resolution at a larger size makes it much easier for those suffering from the effects of old age on their eye sight to read the screen. As such the 14" HP Chromebook is ideal for those aged parents that just want to browse the web, send a few emails and write the occasional letter. For these users a Windows laptop is just something to go wrong that produces endless support problems.
Only two usb sockets
Title says it all, only has two USB3.0 sockets, and there is nothing internal. Why is that important you might ask, well I have /boot on a small USB flash drive so that when I do my Linux software RAID I can put /boot on the flash drive and just do it whole disk and not mess about with partitions. The closest thing to a perfect home server board otherwise, well more SATA ports would be nice.
What I don't understand about these smart meters is why they have been made reliant on GSM/GPRS aka 2G mobile signals. What happens in a few years time when the mobile phone operators decide to ditch their 2G networks because they are not profitable to operate? Also what happens in a house like mine where there literately is no mobile signal indoors (bricks it is constructed from seem to have a high content of magnetic material for some reason) unless you are next to a window?
Surely the sensible thing would have been to do supply side powerline networking. You only need a low bit rate for a smart meter so distance can be improved and it is not reliant on a service being provided by a third part that they can stop any time they want. Given a electricity meters usually last decades this was a dumb move.
Re: Fingers crossed...
20,000 short range rockets pre targeted at all 20,000 artillery pieces? That said I would expect that most of the artillery pieces are arrange in groups so you would need a lot less than 20,000 rockets. The idea that the North Koreans can unhindered keep pounding Seoul with an artillery bombardment and reduce it to rubble is complete fantasy.
I think you will find that Gerald Buller works at Heriot Watt University which while located on the outskirts of Edinburgh is distinctly not Edinburgh University which is another completely separate institution all together.
Chromebox is cheaper
Really get a Samsung chromebox for £250 which includes 16GB od SSD storage and 4GB of RAM. In addition the PSU is built into the box no some separate add on.
LTO1 tape drives are still available on the used/surplus market. If you are using a decent software package to handle your archives and are sensibly keeping all your tapes in the library, and having multiple libraries in separate locations, then the backup/archiving software will take care of migration from one tape technology to the other, with the tape robot in the library doing the shuffling of all the tapes between the drives and the slots with no human interaction once you set it away. Might take some time a.k.a. a couple of months, to complete but if there is no human interaction required in the process that is not a problem.
Lies from SGI
That machine will have 2.5 times the capacity per spindle compared to Oracle, IBM, and Fujitsu arrays in the same class.
Given that IBM sell exactly the same hardware as the DS3512, DS524 and DCS3700, I am keen to know how SGI believe that they will be offering anything better than IBM?
It's about longevity
While I am sure the Quantum tape library is more dense that the competing options, will it still be around in 5 years or even 10 years. A TS3500 purchased 10 years ago (as a 3584 as it was back then) could have gone through several tape drive technology changes, would still be fully warranted from IBM for a maintenance contract and could still be upgrade and have more frames different drives etc. added to it all in incremental stages as the budget allowed.
If you read the specification for the thing on the HP website you will see that it comes with a 16GB SSD. To my mind this is perfect for parent, grandparent where deteriating eyesight due to old age makes the existing Chromebooks screens are too small. Yes it has no more pixels, the fact that they are bigger makes it easier to see for someone wearing reading glasses.
Re: Glass platter
A 10krpm drive with a SAS interface is not aimed at laptops. Besides which IBM/HGST have been shipping glass platters for years.
It's all Rupert Murdoch's fault
Getting on for 20 years ago BT offered to put in fibre to every premiss in the UK. The only thing they asked for was to be let out of the bar on them offering TV over the fibre a few years early. Mr. Murdoch saw this as a threat to his Sky business and lobbied hard to get the government to turn the offer down.
It was biggest mistake of any government in probably my lifetime. Had we taken BT's offer up we would right now be enjoying the best internet connection in the world bar none.
Re: Outsourcing is wonderful
You can go along way to solve the pollution problem in China by introducing pollution duty on imported goods. So goods imported into the EU say that originate in a country that pollutes more than the E.U. are taxed appropriately. This has two positive effects, it limits the race to the bottom as companies outsource manufacturing to places that don't look after the environment as well as we do in the E.U. because the cost advantage is largely eroded by the pollution tax. Secondly it encourages the countries with lax controls to tighten them up to qualify for better pollution duty rates and make exporting manufactured goods to the E.U. easier.
Amazon S3 is expensive at scale
You don't need to scale to a PB, even if you only need a 100TB, it is much cheaper to DIY than buy from Amazon when you spread the cost out over a number of years for most people.
No surprise there
Hardly surprising really, there is no way that you can offer storage at this price using anything else. I suspect however that there is a chunk of disk based storage between the customer and the tape libraries.
The problem with just pulling the phone records is that it does not tell you whether I was holding the phone to my ear or on hands free which is integrated into my car stereo.
I have been rear ended by someone too busy talking to a passenger to pay attention to the fact there was stopped traffic ahead, so the mere fact that you are talking and whether they are in the car means nothing.
Bit error rate
So the $60,000 question is what is the bit error rate on these drives. This is frankly of far more importance than the MTBF these days.
Also 60 drives in 10U, that is rubbish density as all the major players are offering 60 drives in 4U, e.g. IBM DCS3700 for example
Re: Not surprised
Shop around then. I can buy Fuij LTO4 tapes with barcode labels preapplied for less than £20 each including VAT and delivery.
Re: AMERICA, F*CK YEAH!
The blueprints and other Saturn V plans are available on microfilm at the Marshall Space Flight Center, they are emphatically not lost. What is gone I believe is the tooling, and I imagine that some of the electronics might be rather difficult to source in 2012, for example I don't believe they make core memory anymore.
Or the Peruvian government could start a pre-exposure immunization program in the effected communities, thereby reducing the risk to humans.
Re: Vote with your Pounds
Apple are actually on the wrong side of the FRAND. Samsung offered the same FRAND terms as they do to everyone else and Apple turned them down. The reason being that Samsung's FRAND terms include a mobile patent cross license. Apple wanted to keep all it's mobile patents to itself so refused the deal as they just wanted to pay cash for the FRAND patents. Then used the patents without paying any license fee. Read the court submission from Samsung, Apple will eventually loose and loose badly on this one...
Samsung would actually have been in breach of it's FRAND obligations if it had given Apple a different deal, because the deal must be NONE DISCRIMINATORY, and not requiring Apple to cross license all it's mobile patents would have been discriminatory.
On the other hand one can use money to hire coders to produce code that can then be used to buy open-source love.
FRAND and cross licensing
Interesting to read in the document regarding the FRAND patents that Samsung explicitly relate that their Fair Reasonable And Non Discriminatory licensing terms require cross licensing of mobile patents, that Samsung offered such a deal to Apple and they refused it, where as everyone else has signed up.
The desgin patent stuff being claimed by Apple also comes under a hammering of supreme court precedents, that invalidate their claims.
In the end Apple are going to loose big time and end up paying Samsung a large amount of cash.
While flash might be getting cheaper, enterprise flash is still eye watering expensive. As such fast spinning rust offers a very cost effective storage where the out and out random IOPS of flash is not required but capacity with better IOPS than 7200rpm disk is required. I have hundreds of disks at work doing just that.
Need to go back further
I would say that by 2000, A level physics had around a quarter of the syllabus cut from a decade earlier when I took it; easier to know less to a higher standard if you ask me. In addition the multiple choice had gone from A-E to A-D; an immediate improvement for anything you need to guess at. Finally the written paper rather than have a scenario and a number of things you needed to calculate had become a fill in booklet with all the intermediate steps layed out for you; makes life much easier. I cannot speak for other exams by A level physics as definitely much easier by 2000.
Exams have got easier and rather than it being disingenuous to hard working students to day to belittle their work, it is disingenuous to students in the past to suggest they where lazy and not that the exams are easier.
- Vid Hubble 'scope scans 200,000-ton chunky crumble conundrum
- Bugger the jetpack, where's my 21st-century Psion?
- Google offers up its own Googlers in cloud channel chumship trawl
- Interview Global Warming IS REAL, argues sceptic mathematician - it just isn't THERMAGEDDON
- Apple to grieving sons: NO, you cannot have access to your dead mum's iPad