Dynaverse.net
Off Topic => Engineering => Topic started by: The Bar-Abbas Anomaly on May 30, 2006, 04:03:56 pm
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Uses 'Perpendicular Recording'.... :o
http://techreport.com/reviews/2006q2/barracuda-7200.10/index.x?pg=1
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I posted a link about that to Stephen a while back somewhere in this sub-forum. Yeah it is big, and the perpendicular read/write should bridge the gap to holographic hard drives in the future.
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Yep, I think you mentioned it In that Water HD thread. I wonder IF the Seagate plant in OKC is making it.
Stephen
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Drives are nuts! I was in CompUSA the other day (upgrading to a PCIe motherboard and an ATI Radion 1600XT with 512 of RAM :P) and was looking at the hard drives. Geeze... a 300GB ATA 7200 drive is only $120.
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This type of new technology will be implemented soon by all HD manufacturers.
And it's not very evolved right now since we do have standard drives with 500GB capacity.
A revolutionary new tech suppose to do a lot more than an old one. Theoretically.
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So much porn...::drools::
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i'm not very computer literate. everything that I know is basically self taught. but i have been wondering about the memory available on the new disk drives and portables. I had a maxtor 40gb external for almost 3 years until it just upand died on me. I now own a Seagate external with 100gb. what gets me is that my maxtor actually had only 38.75 gigs available for memory and this Segate which is really no biger than a deck of cards has only 96 and some change of memory space.
Where is the rest of the memory??? and why is it so much lost to "programs"???
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Actual numbers:
1k=1024 bytes
1meg=1024*1024=1,048,576
1giga=1024*1024*1024=~1,073,418,000
Hard Drive makers round that off:
1k=1000 bytes
1meg=1000*1000=1,000,000
1giga=1000*1000*1000=1,000,000,000
So every megabyte you lose 48.5 kilobyte. Every gigabyte you lose ~73 megabyte. So on each 100 gigabyte you lose 7.3 gigabytes.
Link to more info (http://en.wikipedia.org/wiki/Binary_prefix)
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Where is the rest of the memory??? and why is it so much lost to "programs"???
Hard Drives are not referred to as memory. They use the same terminology for measurement but memory and storage are used differently and are technologically distinct. RAM is memory (SDRAM, DDR, DDR2 and RDRam are several forms or memory).
Each hard drive is formatted in clusters (typically 4k or 4096bytes.) each program stored on the drive uses 1 or more clusters. On average 1/2 of one cluster (the last one) used by each program is lost (2k or 2048 bytes). With a large number of files (and directories which also use HD capacity) you can lose a significant amout of usable space. One of my partitions holds 18522 files which results in (on average) a loss of 18522x2048 bytes or 37,933,056 bytes (~36.2 megabytes) out of almost 78 gigabytes in files.
This is rather like in some books (mostly manuals) a page will be blank between chapters with the note "This page intentially left blank" as they use the concept that both sides of a page are used in the same chapter or left blank. The 1/2 cluster per file is like that blank page.
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My 120gb is nice and full (I actually had to compress my program files.... but im not using them here in south america so no biggie).
Time to get a nice 500gb internal.