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A Terabyte In A Cigar Box
Anonymous Howard writes "LaCie has introduced a 1 Terabyte (capacity) disk for (get this) only $1,199.00!(USD) It is external and equipped with FireWire 800, FireWire 400, iLink/DV, Hi-Speed USB 2.0 or USB 1.1 to connect to both PC and Mac. Take a look here."
It's a 1TB array in a box (just look at the dimensions and weight if ya doubt it)... Not that it really matters - heck it's way cool..
Think outside the... Hey, where'd the friggin' box go?
Kernel 2.4 and up has USB 2.0 and Firewire support for Mass Storage Devices.
Technically: .909 TiB
1000000000000 Bytes are:
976562500 KiB
953674 MiB
931 GiB
oh, you mean you want a 1 TiB array.
Ugh...correction. The drive's 1TB, not 1TiB. Thats like 90GB lost to marketing!
I know, I know, I'm nitpicking.
p hysics.nist.gov/cuu/Units/binary.html+gibibyte+sit e:gov&hl=en&start=1&ie=UTF-8
1 TB (terabyte) = 10^12 bytes, NOT 2^40 bytes. 2^40 bytes is represented by a value known as a Tebibyte.
Don't believe me? Check out http://physics.nist.gov/cuu/Units/binary.html or google's cache at http://www.google.ca/search?q=cache:lbDn9HCN0SAJ:
Read my journal here.
Well you see, it actually has USB 1.1. But for your convenience, to copy one of these over a Hayes 300 baud modem would take: 300 baud == 30 cps == 30 bytes per second into 1e12 == 33333333333 seconds == 555555555 minutes == 9259259 hours == 385802 days == 1057 years == 1.057 millenia.
...
The international system concluded in 1998 that mega,giga,kilo,tera,etc are base 10, therefore people that think that 1kb is 1024 bytes are wrong.
So, there is no bytes lost to marketing. Learn to use MiB and other units properly
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Sorry, but that's not the way the statistics work. The probability of a failure on a single drive is a cumulative distribution function. The longer the drive has been running, the higher the probability of a failure. Also, it's not linear. There are usually a few failures early in life, then relatively few for a long period of time, and then a bunch of failures again clustered around some point in time. It's kind of like a poisson distribution, but with a long head instead of a long tail. When the manufacturer reports MTBF, I suspect they're talking about where the mean point is on this curve (i.e. at what point in time have 50% of the drives failed). I don't work in the storage industry, so this is just an educated guess. Someone will probably correct me on this. Now, if you want to figure out the cumulative distribution function for a bunch of disks, you can't simply divide the MTBF by the number of disks. Instead, the probability of at least one drive failure is calculated as one minus the probability that none of the drives have failed. So, if there's a 10% chance that a single drive fails within the first year, the probability of at least one failure in a 4 drive box within that same year is 1 - .9^4 = .6.
I had the opportunity to see one at MacWorld. They are very hefty and made of ultra-heavy gauge aluminum (feels more solid than the G5 case). Also very heavy.
The aluminum case is not enough to dissipate the heat generated by the 4 drives, so they also have a fan, but it is a very quiet one (as much as one can jusdge such a thing in a trade show).
The case is also available in a 2 drive 1/2 terabyte version for around $600.