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Newbie question - recommendation for external hard drive connection method
A newcomer's question that I'm sure is answered elsewhere but.. I need
to buy an external hard drive (approx 160Gb or more) and to me there seem to be three primary methods of connecting the thing up - USB 2.0, Firewire or network (via Ethernet card). Are there any strong opinions on which is the best (primarily in terms of speed and value for money) ? Of course if a drive can be accessed by multiple methods that's great, but I don't want to pay extra for something unnecessary. Also, any specific recommendations for particular manufacturers would be be very useful.. Thanks in advance |
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On 13 May 2005 07:25:10 -0700, "benjrees" wrote:
A newcomer's question that I'm sure is answered elsewhere but.. I need to buy an external hard drive (approx 160Gb or more) and to me there seem to be three primary methods of connecting the thing up - USB 2.0, Firewire or network (via Ethernet card). Are there any strong opinions on which is the best (primarily in terms of speed and value for money) ? Of course if a drive can be accessed by multiple methods that's great, but I don't want to pay extra for something unnecessary. Also, any specific recommendations for particular manufacturers would be be very useful.. We use a removeable drive bay. http://www.directron.com/kf23.html Be careful about putting more than one on a given IDE channel. |
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In article ,
Bob wrote: On 13 May 2005 07:25:10 -0700, "benjrees" wrote: A newcomer's question that I'm sure is answered elsewhere but.. I need to buy an external hard drive (approx 160Gb or more) and to me there seem to be three primary methods of connecting the thing up - USB 2.0, Firewire or network (via Ethernet card). Are there any strong opinions on which is the best (primarily in terms of speed and value for money) ? Of course if a drive can be accessed by multiple methods that's great, but I don't want to pay extra for something unnecessary. Also, any specific recommendations for particular manufacturers would be be very useful.. We use a removeable drive bay. http://www.directron.com/kf23.html Be careful about putting more than one on a given IDE channel. There are external SATA exclosures and this would be my choice. Someone makes a PCI card that puts a SATA connector on the PC rear panel. It's just a patter of time for someone to make a front panel adapter. SATA was designed for hotpluging. IDE isn't. -- a d y k e s @ p a n i x . c o m Don't blame me. I voted for Gore. |
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On 13 May 2005 10:44:54 -0400, (Al Dykes) wrote:
Don't blame me. I voted for Gore. One political comment deserves another. Thank God Gore lost or America would be as ****ed up as Britain is today. Gore was the only reason Clinton was not run out of office - no one wanted to have him as president so they backed off Clinton. History will show that GW Bush is one of the greatest presidents ever. He has to make the tough decisions that Clinton didn't have the balls to make - and that's why he has to do drastic things. We now return you to the regularly scheduled forum on hardware. -- Map of the Vast Right Wing Conspiracy http://home.houston.rr.com/rkba/vrwc.html "The people can always be brought to the bidding of the leaders. All you have to do is tell them they are being attacked and denounce the pacifists for lack of patriotism and exposing the country to danger. It works the same way in any country." --Hermann Goering |
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No wonder you have so many problems with computers. You are as ****ed up as
America is. GW Bush is retarded. How many billions do you want to waste on the Great Hydrogen Fraud? Bush is also increasing imports of Oil and Gas, further raising prices. "Bob" wrote in message ... On 13 May 2005 10:44:54 -0400, (Al Dykes) wrote: Don't blame me. I voted for Gore. One political comment deserves another. Thank God Gore lost or America would be as ****ed up as Britain is today. Gore was the only reason Clinton was not run out of office - no one wanted to have him as president so they backed off Clinton. History will show that GW Bush is one of the greatest presidents ever. He has to make the tough decisions that Clinton didn't have the balls to make - and that's why he has to do drastic things. We now return you to the regularly scheduled forum on hardware. |
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On Fri, 13 May 2005 09:00:45 -0700, "Eric Gisin"
wrote: You are as ****ed up as America is. Ad-hom noted. |
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On 13 May 2005 07:25:10 -0700, "benjrees" wrote:
A newcomer's question that I'm sure is answered elsewhere but.. I need to buy an external hard drive (approx 160Gb or more) and to me there seem to be three primary methods of connecting the thing up - USB 2.0, Firewire or network (via Ethernet card). Are there any strong opinions on which is the best (primarily in terms of speed and value for money) ? Of course if a drive can be accessed by multiple methods that's great, but I don't want to pay extra for something unnecessary. Also, any specific recommendations for particular manufacturers would be be very useful.. Thanks in advance As others have veered off into politics, I'll take a stab at this. NAS (Network Attached Storage) is the slowest of the three attachment methods you listed. It is handy if you want multiple computers to have access to the drive, otherwise not the best answer. USB 2.0 has a theoretical maximum throughput of 480Mbps, while Firewire is at 400 Mbps. Yes, there is "Firewire2" at 800 Mbps, but you are not likely to find one of those at a reasonable price at this point in time. Despite the theoretical advantage of USB 2.0 over Firewire, Firewire tends to be better in practice. |
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Very interesting as I was assuming NAS would be fastest, based on
price. If there's not a great deal of difference in speed between Firewire and USB 2.0 I'll base my decision on what the best manufacturers have to offer - are there any real stinkers to avoid ? And any sure bets for good quality drives ? |
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benjrees wrote in message oups.com... A newcomer's question that I'm sure is answered elsewhere but.. I need to buy an external hard drive (approx 160Gb or more) and to me there seem to be three primary methods of connecting the thing up - USB 2.0, Firewire or network (via Ethernet card). Correct. Are there any strong opinions on which is the best (primarily in terms of speed and value for money) ? Like with most things, there isnt a clear best. The network approach has some real advantages, mainly that its been around for years and is very solid now, with the drive on another PC on the network. Main downsides are that this is the slowest, there arent very many drives with that approach interface wise, and pretty crummy documentation on those that are around, mainly because the hard drive majors dont use this approach much. USB2 is the most common approach used, but it has real downsides, mainly in that its still rather immature technology so the life of the drives is often quite poor, just because they arent adequately cooled so the drive gets stinking hot, and there is a too high level of other problems, particularly with the drive not being reliable enough data wise, nothing like as reliable as an internal drive. And a real problem with adequate tools that can run diagnostics on the drive and even do stuff as basic as SMART and temperature monitoring. Firewire has most of those problems too and has another, quite a few of even recent PCs dont support firewire. Quite a few drives are both firewire and USB2 tho. Firewire is theoretically more efficient protocol wise, but while you can see that in the benchmarks, it isnt likely to be something that most could pick with a proper double blind trial with no benchmark allowed. Of course if a drive can be accessed by multiple methods that's great, but I don't want to pay extra for something unnecessary. Also, any specific recommendations for particular manufacturers would be be very useful.. I havent seen any of the majors that are good enough on the drive cooling for my taste. |
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"benjrees" wrote in
oups.com: A newcomer's question that I'm sure is answered elsewhere but.. I need to buy an external hard drive (approx 160Gb or more) and to me there seem to be three primary methods of connecting the thing up - USB 2.0, Firewire or network (via Ethernet card). Are there any strong opinions on which is the best (primarily in terms of speed and value for money) ? Of course if a drive can be accessed by multiple methods that's great, but I don't want to pay extra for something unnecessary. Also, any specific recommendations for particular manufacturers would be be very useful.. Thanks in advance I bought a hard drive and enclosure separately. I chose an enclosure that has both USB 2.0 and FireWire connections It was only about $30 online. I bought a 120GB 7500 RPM drive for $88. With both USB 2.0 and FireWire connections on the enclosure, I've got almost universal connectivity. I can take the drive to almost any PC/MAC/Linux box and hook up for data transfer. Since USB 2.0 is backward compatible with USB, it means I can still connect and transfer to a "slow USB" computer--it just takes more time. I guess you'd have to consider whether you want to use it on your own computer or if you want to be able to "take it anywhere." SATA isn't available on lots of computers. External SATA is very rare these days. SATA would be nice and fast. If for your home computer only, maybe that would be best. If you plan to take the drive somewhere, might be best to see if there's a SATA hook up available. For speed? Let's look at speed. USB and FireWire claim 400 Megabits per second. 400megabits ÷ 8 bits per byte =50 MegaBytes per second. 50 Megabytes per second. Most hard drives aren't going to be able to sustain that rate of transfer. They may "burst" faster, but, that only lasts a portion of a second in time. Most hard drive companies won't divulge their "sustained" rate of data transfer. The "sustained" data transfer rate is largely dependant on platter rotation speed and platter density. You can search the web for hardware reviews to see what the "sustained" rate of data transfer is for some drives. The "bigger" the drive--usually--the faster it is ... as long as they are cramming those Gigs on the same number of platters. In other words, if you have a 7500RPM 160 GB drive using 3 platters compared to a 7500 RPM 300 GB drive also using 3 platters, you can see that the magnetic material must be packed more densely onto the 3 platters of the 300GB drive. Packed more densly means that more data "space" travels under the read/write head at any given moment in time. So ... When you consider what connection you want, you may want to consider the maximum sustained transfer rate of the hard drive that your choose. If you choose a 7500RPM drive of 200GB or less, you probably won't see a sustained rate of data transfer much more than 50MegaBytes per second. So, FireWire and/or USB 2.0 would be fine. (You probably would want to dedicate the hard drive to one particular USB or FireWire port. If you shared the port with a printer or something, you'd be giving up some bandwidth to the other device running on that port.) There is double-speed FireWire. See the 800Mbps FireWire stuff at http://www.orangemicro.com. To utilize that speed, however, you'd have to have a double-speed FireWire PCI adapter (or chip on your MoBo) along with a hard drive enclosure that is 800Mbps FireWire. It is backward compatible with regular FireWire. That would give you a sustained rate of transfer somewhere in the neighborhood of 100 MegaBytes per second. However, I doubt that even a 350 GB drive could sustain that speed. It might, though. I haven't clocked them. Reviewers online could answer that question. At any rate, you see specs for ATA133 and SATA 150. These are 133 MegaBytes/second and 150 MegaBytes per second. These rates can only be delivered from your computer to the memory chip in the hard drive. These rates cannot be "sustained" through transfers to the magnetic medium of the hard drive platter. So, the ATA133 and the SATA 150 only pertain to a fraction of a second where data can be written to the memory chips of the drive. Once that memory chip is saturated after the first second or so, you are slowed to whatever data transfer rate can be accomplished by the pure mechanics of the platters spinning under the read/write head--known as the "sustained" transfer rate. So? USB 2.0 and plain old FireWire is usually good enough for most people. An enclosure at one of the smaller outlets on the web will have USB 2.0 and FireWire chips in a plastic enclosure for about $30. Often, there's free shipping. What brand to choose? Doesn't really matter. There's only a few companies out there making chips. No matter what you buy, you'll probably get Oxford, VIA, or NEC chips in the external enclosure. //rus// |
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