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Hard drive MTBF

You don't even have to replace them! If your servers can detect failed disks, and stuff is backed up all over the place, just leave the disk there and have the software remember to put the data elsewhere.
- warhorse
- Post #5
- Jan 8, 2005
- Forum: Ask a Technical Professional
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Hard drive MTBF

An example of what Mark R is saying: For your disk of 1400000 MTBF hours, if you have 1400000 disks (pretend you're Google), then you should expect to have one disk fail every hours. If you have 700000 disks, one disk will fail every 2 hours. The number certainly does not apply to a...
- warhorse
- Post #3
- Jan 7, 2005
- Forum: Ask a Technical Professional
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overclockstuff GFD

I need a fileserver to share stuff with my roomate. None of my really old stuff will take a 40 gig hard drive so I figured I'd pop out the old Athlon, clock it down as low as it will go, then stash it in the closet. Besides, the old Slot A is still cool :)
- warhorse
- Post #3
- Jul 21, 2004
- Forum: CPUs and Overclocking
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overclockstuff GFD

I know this is old stuff, but I've got a GFD made by overclockstuff. Doing a search on Google and on the forum here gives nothing, and the original website is dead. Anybody have the settings info for this thing? Thanks.
- warhorse
- Thread
- Jul 21, 2004
- Replies: 2
- Forum: CPUs and Overclocking
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security hacking question

I'd go with social engineering. Call up the IT staff, address said person by name, claim to be The Boss. Say you messed up your password and need it reset. Threaten to fire peon.
- warhorse
- Post #4
- Apr 8, 2004
- Forum: Ask a Technical Professional
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When will we be rid of Hard Disks?

While I am aware that sectors go bad, what I meant was that I think in general the lifetime of a particular sector is more affected by the motor burning out or the head crashing into it rather than the degredation of the magnetic coating due to excessive use. Users don't concern themselves with...
- warhorse
- Post #41
- Apr 1, 2004
- Forum: Ask a Technical Professional
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tough program problems

Peter, how do you get that there are only 4^3 combinations with no number shuffling? With no shuffling, the value can be 0-9 so it should be 4^10. Of course the answer for 1234 is the same as 4321 so I think it's just 10 c 4
- warhorse
- Post #11
- Mar 31, 2004
- Forum: Ask a Technical Professional
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Which Mythtv linux distro?

http://mysettopbox.tv/knoppmyth.html might work well. It boots right from CD, so you'll know if it works or not before you install it to disk.
- warhorse
- Post #2
- Mar 31, 2004
- Forum: Windows
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tough program problems

Alright, so we haven't actually answered the question because in order to precompute you still have to be able to compute one. We've so far assumed that we have all of the answers already. (I still maintain that precomputing is the best overall solution. I bet you could store each solution in...
- warhorse
- Post #6
- Mar 30, 2004
- Forum: Ask a Technical Professional
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When will we be rid of Hard Disks?

To overwrite data on a flash sector, you need to "flash" it, meaning, clear it then write the new data. Even if you want to change 1 bit you have to do this. For things like temp directories and swap, this would kill it in no time. However flash drives have some weird LFS like internal...
- warhorse
- Post #37
- Mar 30, 2004
- Forum: Ask a Technical Professional
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tough program problems

I would precompute all possibilities into a 4-D array (also stored on disk to prevent future calculation), then not only will the program work, it will be an O(1) operation! If you're going to use the program frequently, the essentially free lookups amortizes the cost of the precompute away.
- warhorse
- Post #2
- Mar 30, 2004
- Forum: Ask a Technical Professional
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When will we be rid of Hard Disks?

My understanding of flash drives leads me to suggest that using one as a hard disk makes no sense. Yes, they are faster for random access (.02ms claims the m-systems.com site for their crazy expensive disks) but because flash disks have limited flash cycles they run some incarnation of LFS...
- warhorse
- Post #33
- Mar 28, 2004
- Forum: Ask a Technical Professional
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When will we be rid of Hard Disks?

I'm not familiar with cube drives. By instant do you mean speed of light limitations? What about mirror rotations?
- warhorse
- Post #28
- Mar 27, 2004
- Forum: Ask a Technical Professional
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When will we be rid of Hard Disks?

Well, rpm isn't the only factor affecting disk speeds. As long as the sector per track density keeps going up at the rate that they are now, then consecutive reads and writes will get faster for a constant rpm. With sector skew, single head and cylinder switches are pretty cheap too so...
- warhorse
- Post #26
- Mar 26, 2004
- Forum: Ask a Technical Professional
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how do hardware and software really interface?

Let me try it from the perspective of a computer scientist with no knowledge of EE. A lot of commands have their own wire on the bus. Let's consider SCSI. There is a wire dedicated to saying "I want to talk on the bus" There are 8 wires then, 1 for each device so that a device can say "I am...
- warhorse
- Post #6
- Mar 25, 2004
- Forum: Ask a Technical Professional
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I know Linux Does this but will this... but

Yeah, the partition for the page file is a requirement. Linux accesses the partition like a raw device, I think, so it doesn't use a filesystem or anything like that to store swap. As for setting up partitions, that isn't a requirement and it depends on your installer. IIRC, Red Hat would just...
- warhorse
- Post #3
- Mar 24, 2004
- Forum: Operating Systems
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May move to Linux; Ipod, Wireless, Logitech ?'s

Mice and keyboard will work with no problems since they're pretty standard (I've never had a keyboard or mouse other than serial mice that I couldn't get to work) Wireless cards usually work. Most of them run a Prisim type chipset which is supported (Lucent Orinoco, Cisco Aironet, Dlink...
- warhorse
- Post #7
- Mar 24, 2004
- Forum: Operating Systems
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What is special about scandisk and the 10% mark in windows 9X?

I'm not very familiar with fat32 but I'm guessing that 10% is where it starts reading the metadata information. It probably has to read in all of the directory and file information, then after it gets past that it starts checking actual blocks and then the bar resumes as normal. (This may be...
- warhorse
- Post #11
- Mar 24, 2004
- Forum: Operating Systems
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Hard Drive prices suck!

As everyone else has said, hard drives are really getting cheaper. I think the real question should be: why aren't hard drives getting _faster_. I bought a 7200RPM drive 4 years ago, and they're still standard? Seek times haven't really changed since I bought that drive either.
- warhorse
- Post #35
- Mar 23, 2004
- Forum: Computer Building
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When will we be rid of Hard Disks?

(Sorry, haven't been here in awhile and I messed up the log in process.. and I can't figure out how to delete my last post.) I sat in on a Seagate talk over the summer, and magnetic hard disks are not going away. I can't remember exact densities, but I do remember some of the techology that...
- warhorse
- Post #19
- Mar 23, 2004
- Forum: Ask a Technical Professional
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When will we be rid of Hard Disks?

grr, how do I delete this thing :)
- warhorse
- Post #18
- Mar 23, 2004
- Forum: Ask a Technical Professional
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ld-linux.so?

Do a ./configure --help You can pass alternate lib directories there somewhere.
- warhorse
- Post #4
- Jul 21, 2003
- Forum: Operating Systems
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Celermine, Slotket, and linux

Well I flashed the BIOS, and the "external cache" in the bios is set to "write back" as opposed to disable.. /proc/cpuid and wcpuid both say 32k... meaning the l2 is dead or missing. I thought maybe it was the slotket preventing it from being reported correctly or something.. wish I had a...
- warhorse
- Post #3
- Dec 12, 2001
- Forum: Computer Building
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Celermine, Slotket, and linux

Hello. I've got a celeron 533a@800 on an Iwill slotket II running Mandrake 8.0 I just did a cat on /proc/cpuinfo and here's what I get: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 8 model name : Pentium III (Coppermine) stepping : 3 cpu...
- warhorse
- Thread
- Dec 11, 2001
- Replies: 2
- Forum: Computer Building
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random number generator

Yes, you are right. Pi is not a random number. However it's digits can be considered random. Therefore I think using a function that calculates the n'th digit of pi is effectively random.
- warhorse
- Post #13
- Dec 3, 2001
- Forum: Ask a Technical Professional
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random number generator

If you are interested in random theory, check this out: http://www-2.cs.cmu.edu/afs/cs.cmu.edu/academic/class/15251/Site/Materials/Lectures/lecture20/lecture20.html Basically, you can define a random number through incompressibility. If you can't compess a number, there must be no pattern and...
- warhorse
- Post #11
- Dec 2, 2001
- Forum: Ask a Technical Professional
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"no screens found" linux problem

Check your kernel! Radeon support didn't work for me until after 2.4.8. The symptoms you describe are exactly what I used to have. Monitor goes into power save and doesn't respond. Here's what you need: 4.1.0 or higher 2.4.8 or higher add "agpgart agp_try_unsupported = 1" to modules stuff Or...
- warhorse
- Post #4
- Dec 2, 2001
- Forum: Operating Systems
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How hard it is really to put on the Alpha PAL8045T?

Make sure you check to see if your motherboard supports it. I don't have a link off hand, but it didn't fit my FIC AD11. I had to dremel the thing and break off three of the fins to get the capacitors to fit. Other than that, it isn't too bad to get on, unless your case is a mess like mine.
- warhorse
- Post #7
- Dec 1, 2001
- Forum: Cases & Cooling

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