WD 500 GB HDD - is this too slow?

VirusType2

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I'm about to buy this unless you guys have heard anything bad about it, or know of a better option.

500GB HDD
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136073

I need space. I have two full HDD, and the 80GB drive has to go.

I really need a ton of space. I don't like to delete stuff off my drive, just so I can defrag, but thats what its come to. :(

I have a lot of games, and a lot more to come. :sleep:

This drive is cheap, and huge, and I just wanted to know what you guys know.
Thanks
 
Its good enough, I have the same specs, but I have a seagate barracuda instead. The only real problem you'll have is formatting something that big, it takes a while (I took me a while)
 
Its good enough, I have the same specs, but I have a seagate barracuda instead. The only real problem you'll have is formatting something that big, it takes a while (I took me a while)
I can't believe the price on it, I paid $80 for an 80GB a few years ago (another one I didn't do the rebate in time, though I almost always remember)

500GB. The one guy said it takes 5 more seconds to boot windows using it as a boot drive. See, that, I could deal with, but from what I've learned, you should put the games on the 2nd drive, not the OS drive

(games that run from the HDD, not games that load entirely in memory)

So, I was going to use it as a slave drive, but now I don't know. I know I will have mostly games on it. I don't want my gameplay to be noticably affected.

anymore suggestions?

Thank you
 
Thats a good, solid & fast HDD. Only thing faster is a 10k or 15k drive, but they don't come in 500GB. Yet.

-MRG
 
Thats a good, solid & fast HDD. Only thing faster is a 10k or 15k drive, but they don't come in 500GB. Yet.

-MRG

Thanks.

here is what I've learned so far, it's quite informative:
http://www.fatwallet.com/t/18/723538

And here is the stuff we'll be seeing in the not-to-distant future. 1 Terrabyte HDD's :O
http://www.tomshardware.com/2007/04/17/hitachi_7k1000_terabyte_hard_drive/index.html

So I guess I'm planning on using it as a slave drive. I hate mucking with it, so I won't want to move it.
 
I have the same HDD. Works wonderfully. I use it for most of my games and I've never noticed any slowdown or problems.
 
Make sure you keep up with defragmentation, defragging that drive also takes time.
defrag as soon as OS is installed and up to date, defrag every time you install large apps like games. That case you will stay on top of that drive.
 
Make sure you keep up with defragmentation, defragging that drive also takes time.
defrag as soon as OS is installed and up to date, defrag every time you install large apps like games. That case you will stay on top of that drive.

Very good advice. If you wait until the drive is fragmented, a HDD that size *could* easily take several hours if not longer to defrag, depending on the initial fragmentation.

-MRG
 
Only got 250 GB here atm and in the start I used to defrag multiple times a week, but haven't done it for months. I dread the time it's going to take..

Can't wait for cheap 200+ GB solid state drives tbh.
 
Make sure you keep up with defragmentation, defragging that drive also takes time.
defrag as soon as OS is installed and up to date, defrag every time you install large apps like games. That case you will stay on top of that drive.

Definately.

If you tend to be lazy/forgetful like me, I recommend getting Diskeeper Professional. It has an auto defrag feature that constantly defrags using spare resources, plus its full defrag is so much faster than the default windows one.
 
I have the exact drive as my backup, I run the OS on my 40gig main.

Works like a charm, running games from it is smooth and quick.
 
I have an 80 gigger as primary everything and I have 50 gigs free.
 
The SE16 is pretty fast. Not quite as fast as the RE2 version but it's up there. I've got both and they work well. The SE16 is probably the better value since it's about $30 cheaper than the other.
Review

Low on the noise/power as well (Seek = Load).

That was really helpful, thanks a lot.

Originally Posted by Asus
It's beginning to make sense as an alternative now.

Holy shit thats desirable :naughty:

I would like one of those for things like an OS drive, or for a particular game that might load all the time. So in games where it takes like 30 seconds to load, it might only take a second or less? That is sick. It's like a video game cartridge.

So could these be used as a third drive? I mean, I'm going to need at least two 500 gig drives, and would like an OS drive like the flash DD. I mean, can I plug these things into a USB port and have several? Use them like game cartridges, with instant access times?

The future is cool.
 
:)


Damn, I just looked and it's not on sale anymore at Newegg. :hmph: I was about to order it yesterday, but I had to get to bed for work, and I wanted to sleep on it. I bet I can find it somewhere else then.

I'm starting to think I should wait for the 1 terrabyte drives, unless they will be more than $260, because thats about as much as I'll pay for one, since i'm a tight wad.

Maybe a 750 GB is right up my alley, I'll be checking for prices in a second.

What does this mean?
Of course, that doesn't make the SE16 a poor choice, especially since you don't have to worry about disabling TLER for non-RAID applications.
If I get the RE2, do I have to worry about disabling TLER, and what does that entail...

looking it up now.

Somebody wrote this on newegg: "To many people are spreading BAD RUMORS saying WD has released a tool to disable the TLER mode. ...

http://www.google.com/search?source...ls=GGLJ,GGLJ:2006-41,GGLJ:en&q=disabling+TLER

so does that mean I can't use the WD RE2 for a desktop PC?


Well, I just looked at Western Digital's website. Apparently they don't make any internal drives greater than 500 GB at this point.

I'm having trouble finding the drive in my original post (the WD 500GB Caviar 16) for a lower price as well. :(
 
Here you go. - Western Digital Caviar SE16 500GB SATA2 w/16MB Buffer ***Free Shipping***
http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=101259 - $121

-MRG

Awesome yeah, i forgot about that. Free shipping too!

Problem.

My stupid computer uses stupid ribbon cables, and I'm stupid.

Does this or most HDD drives still have ribbon cable support? I think it's called simply ATA or something?

This is a SATA 3.0 drive, will I be able to connect it with the ribbon cables?

I can't wait untill I build a new computer, I'm going to make sure it has all of the newest features. What kind of benefit can you get from SATA 3.0?

Thanks In advance.
 
Its good enough, I have the same specs, but I have a seagate barracuda instead. The only real problem you'll have is formatting something that big, it takes a while (I took me a while)

Quick format anyone?

Awesome yeah, i forgot about that. Free shipping too!

Problem.

My stupid computer uses stupid ribbon cables, and I'm stupid.

Does this or most HDD drives still have ribbon cable support? I think it's called simply ATA or something?

lol no. There is a difference between PATA and SATA HDDs check if your motherboard supports SATA, there are usually colorful small slots located near the bottom. In this case you would also need a SATA cable.

_SATPAT.JPG


This is a SATA 3.0 drive, will I be able to connect it with the ribbon cables?

I can't wait untill I build a new computer, I'm going to make sure it has all of the newest features. What kind of benefit can you get from SATA 3.0?

Thanks In advance.

SATA has faster transfer speeds than PATA.

Well, I just looked at Western Digital's website. Apparently they don't make any internal drives greater than 500 GB at this point.

You cannot find WD greater than 500, Seagate on the other hand are a different story.
 
Quick format anyone?



lol no. There is a difference between PATA and SATA HDDs check if your motherboard supports SATA, there are usually colorful small slots located near the bottom. In this case you would also need a SATA cable.



SATA has faster transfer speeds than PATA.



You cannot find WD greater than 500, Seagate on the other hand are a different story.

OK, i have two HDD's installed using these really fat ribbon cables. I assume that is P ATA.

I notice that I have 4 empty slots on my mobo. they are labeled
SATA1
SATA2
SATA3
SATA4

so does that mean I can have up to 4 HDD's? :E My transfer speeds will be faster? For games like Oblivion, my character runs so fast, my HDD can't keep up, and it messes up my gameplay with pauses and loading. Would this fix it?

How can I find out what type of SATA I have. I doubt a computer that was released only a few months ago would use the old 1.5 SATA correct? That's obsolete right? This PC is a frankenstien of my old parts and some new parts, but this is a new mobo from a new computer. I wonder why they used the old PATA HDD. cost? availability? I guess.

So that means I do have 3.0GB SATA? I have to make sure the new drive comes with cables.

How will I hook this up as a second HDD when my other drive uses P ATA? In the bios or something?

My motherboard SATA inputs look like this:

http://images.google.com/imgres?img...um=1&hl=en&rls=GGLJ,GGLJ:2006-41,GGLJ:en&sa=N

You'll have to enlarge it


see how they have 4 black connection slots with the 2 red cables plugged in? So I'm good then right? I can order the drive?


By the way, my SATA ports have an L shape to them. In wikipedia they call it 7 pin SATA. this is ok right, I just buy the appropriate cable for the drive?

I mean, the new HDD should come with cables right? I have a new PSU, that came with the new 15 pine power cables, instead of the old molex conectors, so thats covered.

I'm thinking the drive should come with a SATA connector, right? Or do I buy one to be sure, that's what I'll probably do, waste money, but it's better than getting it and not being able to hook it up.

THANKS!
 
HITACHI Deskstar 500GB 8MB Cache IDE Ultra ATA133 Hard Drive - $131
http://www.newegg.com/Product/Product.aspx?Item=N82E16822145136

Full listing of PATA Hard drives
http://www.newegg.com/Product/Produ...N=2000150014+1035907788&name=IDE+Ultra+ATA133
http://www.zipzoomfly.com/jsp/ProductList.jsp?ThirdCategoryCode=110901

16MB Cache PATA Hard Drives
http://www.newegg.com/Product/Produ...&N=2000150014+1035907788+1035407760&name=16MB

I'm sure other online vendors have them as well. Let me know if this helps. I'll get more info if needed.

-MRG
 
Tell you what i'll do. Give me the exact make & model of your motherboard and i'll get info on the fastest, largest HDD that your motherboard will support. That will be way easier for me to get you the info you need.

Those 4 SATA ports are ports where you can plug HDD's into. So yes, you can have 4 HDD's installed. For storage, RAID, you name it. Also new optical drives (CD/DVD burners) are now comming in SATA format. To do away with the bulky cables inside your PC. You would plug them into those slots as well.

Get me that info. Chances are your motherboard might support that SATA2 HDD I listed. Both SATA 1 & 2 are better than the old ATA/IDE HDD's. Also some SATA2 HDD's are backwards compatable. So if they are SATA2, but your mobo only supports SATA1, they would still work.

-MRG
 
Tell you what i'll do. Give me the exact make & model of your motherboard and i'll get info on the fastest, largest HDD that your motherboard will support. That will be way easier for me to get you the info you need.

Those 4 SATA ports are ports where you can plug HDD's into. So yes, you can have 4 HDD's installed. For storage, RAID, you name it. Also new optical drives (CD/DVD burners) are now comming in SATA format. To do away with the bulky cables inside your PC. You would plug them into those slots as well.

Get me that info. Chances are your motherboard might support that SATA2 HDD I listed. Both SATA 1 & 2 are better than the old ATA/IDE HDD's. Also some SATA2 HDD's are backwards compatable. So if they are SATA2, but your mobo only supports SATA1, they would still work.

-MRG


I don't know what kind it is, that's part of the problem. I can't really check right now, as I've got to work later, and I have to sleep first. I've already ordered the Hard drive, I'm paying an extra 2 dollars to get it faster. I've done a search, and apparently SATA2 drives (which they should have been named damnit. who the hell wants to type 3.0/Gbps or whatever the ****)...

Sorry. The sata 2 drives will work on a Sata 1 mobo, which apparently I have, since it uses the L shaped connector (1.5/Gbps). Too bad, I have trouble believing they would go with the obsolete tech when building this mobo, but thats probably because it was dirt cheap tech, or maybe 3.0 is brand new, idk

I wonder If I could (theoretically) have like 6 fuggin drives in there. (er with a bigger tower of course)

I know it will work without problems hooking it up or anything. I have faith in WD, never had any problems when I buy their drives. I'm sure if anyone, they have backwards compat.

Thanks guys very much, I'll post again when I get it up and running, to let you know how my experience went, and recommend the seller, manufacturer, and any other info.
 
Technically there is no version SATA 2. Companies just slapped the SATA2 name on SATA products that bumped the speed from 150 to 300 transfer rate. It is not a different formed spec. It's all covered under the SATA spec (although older SATA products may not include the other features). I have not seen any new connection or spec recently that would make the SATA drives incompatible. Some of the newer SATA cables look a little different and are more secure when plugged in (won't fall out). Those work on any SATA board though.

Did your motherboard or system come with SATA cables? A lot of SATA drives don't come with them in the box. I'm not sure about other brand drives but I know you can use the regular 4-pin molex connectors from the power supply in WD's SATA hard drives if you don't have the SATA power on your PSU.
 
Technically there is no version SATA 2. Companies just slapped the SATA2 name on SATA products that bumped the speed from 150 to 300 transfer rate. It is not a different formed spec. It's all covered under the SATA spec (although older SATA products may not include the other features). I have not seen any new connection or spec recently that would make the SATA drives incompatible. Some of the newer SATA cables look a little different and are more secure when plugged in (won't fall out). Those work on any SATA board though.

Did your motherboard or system come with SATA cables? A lot of SATA drives don't come with them in the box. I'm not sure about other brand drives but I know you can use the regular 4-pin molex connectors from the power supply in WD's SATA hard drives if you don't have the SATA power on your PSU.
Heres the information that I gathered so far

I really just dove in, and this is the first time I'm messing with it. I have installed EIDE or PATA drives a few times, and that is the extent of my knowlege.

There are 'I' shaped SATA connectors and 'L' shapped ones. I have no idea what type of hook-up options that this drive I ordered has. I have noticed many HDD's offer only one type of connection.

My main concern is that it has an I type, which is what I believe to be the 3.0 type(or sataII). My motherboard has the L type which is what I believe to be the 1.5 type(or sata1).

Another concern is that I am now under the impression that the drive doesn't come with any cables.

I do have the proper power cables of every sort. My new PSU came with shit-loads of high quality cables that I had never seen before and didn't know what they were for. now I know, and I still have them.

So all I worry about, is if my drive is I, and my board is L, will it still connect? Do I buy one of each type and try both? I search monoprice, but don't see an adapter or converter.



And finally, for future improvement, I wonder If I can buy a SATA II driver card PCI slot or something,(something that I've heard about while searching) to unlock the full speed of my new drive. (or just to get the ****in thing working in the first place) ;)


I have confirmed from several places that an SATA2 drive will work on a SATA 1 mobo, but they don't go into detail about what wire to use or anything, and I'm kind of upset, because I would like to order the wire I need before I go to bed, so they get to my house at relatively the same time.


But, I should have gone to be hours ago. I work the graveyard shift, and my job is very physically demanding (moving heavy boxes all night), and I'm going to be in pain, and extremely tired since I won't be getting enough sleep.

:x

All of this technical stuff could make a poor guy go buy an xbox, with the HDD you know will fit. :angry:

EDIT:

Woot, found the answer:
SATA data cables plug into SATA connectors on your motherboard as pictured below. The actual connectors and cables will come in several different colours (not that it matters) and can vary in general shape, but inside each and every one will be the same "L" shaped 7-pin connector (see picture below).



If you come across any devices which support Serial ATA 2 (SATA-II), keep in mind that it is backwards compatible with first generation SATA devices. The only difference in the connectors is a little locking mechanism that SATA-II cables feature, but other than that the cables and motherboard connections are interchangeable.
so the cable will fit, they are interchangable. SO, if im lucky, and I know i am, my mobo does support Sata2. Bonus! 3Gbps transfer. that will be a big difference going from PATA to SATA 2.

:D

:D

info found here, do read it, and learn:
http://images.google.com/imgres?img...m=10&um=1&hl=en&rls=GGLJ,GGLJ:2006-41,GGLJ:en

oh, and here is a close up images of the I and L type SATA connectors:
http://www.satacables.com/html/sata_external_cables.html

EDIT: I bought some cables. I got 2 UV reacting blue SATA 2 cables, two differnt legths (in case something changes and I need a longer one, or a second one, and I got 1 long RED SATA 1 cable, along with 100 feet of grey internet cable.

All for like 27 dollars ( and 7 of that was shipping)

For comparison, I paid 75$ for 100 feet of internet cable at a local store, so when I get the new one, I can take this $70 one back and get my money back. So basically, I got paid $50 to buy this stuff, if you think about it.
:)

I love how SATA2 has the hotwire jacks, so you can plug and unplug drives in while the PC is on. :) And now I can plug it in, do a direct copy of my OS drive using the WD install software, then I'm all set. 500 GB yay.

Oh, and thank you guys again. you are the best help
 
Looks like you got all what you wanted figured out. Woot

Just an FYI, it's ok if you get a drive that supports the SATA 300 speed but plug it into a board that is only SATA 150. Average transfer speeds for the fastest desktop hard drives are about 70 MB/s. They don't even saturate PATA133 speeds. Burst speeds go a lot higher although that won't make a noticeable difference in it's overall performance. What does make a difference though is going from an older drive with a slower average transfer speed (40MB/s maybe) to a newer drive with a lot better speeds such as your WD 500GB. It's all in the drive rather than the cable.

Just read post# 14 (Codesmith) to clear up about the SATA spec I guess.

No talk of SATA2 here on wiki
"This is why a SATA data cable rated for 1.5Gbps will currently handle second generation, SATA 3.0Gbps sustained and burst data transfers without any loss of performance."
 
Average transfer speeds for the fastest desktop hard drives are about 70 MB/s. They don't even saturate PATA133 speeds. Burst speeds go a lot higher although that won't make a noticeable difference in it's overall performance. What does make a difference though is going from an older drive with a slower average transfer speed (40MB/s maybe) to a newer drive with a lot better speeds such as your WD 500GB. It's all in the drive rather than the cable.

Just read post# 14 (Codesmith) to clear up about the SATA spec I guess.

No talk of SATA2 here on wiki
"This is why a SATA data cable rated for 1.5Gbps will currently handle second generation, SATA 3.0Gbps sustained and burst data transfers without any loss of performance."

Like you said, it also has faster burst speeds. Also SATAII is better at multi-tasking, and also offers the benefits of no longer setting jumpers, less jumply wiring, and hot swapping.

I haven't done any benchmarking (I'm sure someone has though, and it would be an interesting comparison), but It seems much faster during certain tasks, and about the same during other tasks. It seems much faster when reading from the drive and loading it into memory - a problem I complained about and a reason I was interested in this new drive that uses SATA II.

Sorry I couldn't respond sooner, my PC has been pretty much down for a week. This is what I get from wikipedia:

SATA 1.5 Gbit/s
First-generation SATA interfaces, also known as SATA/150 or (erroneously) as SATA 1, communicate at a rate of 1.5 gigabits per second (Gbit/s). Taking into account 8b10b coding overhead, the actual uncoded transfer-rate is 1.2 Gbit/s, or 150 megabytes per second (MB/s). In actual operation, SATA/150 and PATA/133 are comparable in terms of their theoretical burst-throughput. However, newer SATA devices offer enhancements (such as native command queuing) to SATA's performance in a multitask environment.


First-generation SATA devices were scarcely faster than legacy parallel ATA/133 devices. So a 3 Gbit/s signaling rate was added to the Physical layer (PHY layer), effectively doubling data throughput from 150 MB/s to 300 MB/s. SATA/300's transfer rate is expected to satisfy drive throughput requirements for some time, as the fastest desktop hard disks barely saturate a SATA/150 link. This is why a SATA data cable rated for 1.5Gbps will currently handle second generation, SATA 3.0Gbps sustained and burst data transfers without any loss of performance.
http://en.wikipedia.org/wiki/Serial_ATA

See (in bold, second part of quote) it says, "barely saturate a SATA/150", it doesn't say, "barely saturate a PATA" like what you heard. Granted it says, "the fastest desktop drives", so Idk.

What do you think?
 
We know SATA drives don't use jumpers. I was simply referring to PATA as an example with speed.
All I'm saying is that referring to the cable spec does not give you a true idea regarding a hard drive's performance. It's all in the drive. (and yours does have good performance)

Keep in mind this is just a quick look.

For reference, PATA allows for 100 and 133MB/sec. SATA allows for 150 and 300MB/sec. SCSI Ultra320 allows for 320MB/s and Ultra640 is 640MB/s.
Scroll down for transfer rates in this review. Notice the fastest transfer rate was in the 90MB/s range and by a SCSI drive. The lowest SCSI drive was at 61. 70-80 for Raptors. 60-70 for the desktop drives tested. Not really saturating anything there.

Now for comparing burst speeds impact with 150MB/s vs 300MB/s, look at the Seagate Barracuda in this review. 7200.8 is 150MB/s while the 7200.9 (160GB) is 300MB/s. Both have the same 8MB cache (the other Seagate drives have more cache so I would ignore for a direct comparison).
While the 7200.9 (160GB) drive does have the higher burst speed....217MB/s vs 129MB/s...it didn't really make a huge impact on performance as you saw from the other link.

So why talk about an interfaces speed if it does not make the drive's performance?
 
So why talk about an interfaces speed if it does not make the drive's performance?

Because, remember? :laugh: I thought I was going to get faster loading from my new HDD than I was from my PATA drive, and I got all excited about it. Then you came with your black cloud of truth and ruined everything. :p

So it's not even faster at all at getting info off the drive?

And completely on a wierd note:
Holy shit that was weird. A huge ****ing bang of thunder occoured right after mentioning your black cloud.


Just rememeber, I may be crazy, but I may have unknown powers... It started pouring down rain right after saying that... Maybe you have powers! Shit, that thunder sounds like it's going to get me tonight. I mean it. It sounds like bombs... And it just turned 10:00! What does it all mean?


D:



heheh

EDIT: back on topic, so according to their benchmarks in your post, my caviar 16se500MB gets 190 MB/s burst speed? So it breaks the SATA I barrier? So... what is burst speed? (A wild guess) That's like initial speed?
 
Your SE16 is faster than the old drive for sure. But it's not about the interface.

A car that can travel at 70mph won't be any faster going on a highway with a 150MPH speed limit than a 100MPH Limit. But it's still faster than the 50MPH car.

The burst speeds are probably when the cache on the drive can effectively be a buffer and not waiting for the drive to catch up. Cache speed is a lot faster than what the hard drive motors can dish out. But for the majority of the time the data is just streamed from drive->cache->pc without buffering since the drive's speed is the weak link.
 
Your SE16 is faster than the old drive for sure. But it's not about the interface.

A car that can travel at 70mph won't be any faster going on a highway with a 150MPH speed limit than a 100MPH Limit. But it's still faster than the 50MPH car.

The burst speeds are probably when the cache on the drive can effectively be a buffer and not waiting for the drive to catch up. Cache speed is a lot faster than what the hard drive motors can dish out. But for the majority of the time the data is just streamed from drive->cache->pc without buffering since the drive's speed is the weak link.

With memory being so massive and cheap the past few years, it suprises me that they don't just put more memory in the drives. I mean, 8MB and 16MB? Thats jack shit. I guess it's not anymore usefull to have a larger cache, since the drive catches up like you say.

About my old drivek, it's a Western Digital WD 80GB and I only bought it like 2 years ago. I would actually be surprized if it was significantly slower (if it wasn't for the interface) well because they are both 7,200 RPM drives, but I would be glad to hear that my new drive is faster, all the same.


I just read somewhere, that hard drive capacity increases by 40% every year, on average. I don't know if it can keep up with jumps like that. The bigger they get, the bigger the jump has to be to a larger size ( a multiplier) in order to keep up with 40%.

It's good news though. Technology evolves at light speed. I'm afraid the future of PC's (really the internet) is going to be all gimped and governed and lame. Enjoy your freedoms. Look what they are doing to internet radio. Next is tons of copyright stuff with pictures and websites music, movies, tv, verification, identification. It's going to suck.

Watch out that you don't install any keyloggers. this is the big thing now... anyway.
 
Bigger drives = more data in the same area. Think about it.
 
Bigger drives = more data in the same area. Think about it.
__________________
Yeah, I heard they have been able to make the tracks smaller and closer together, meaning the arm doesn't have to go as far to read the same amount of data. Probably not the right terminology, but I understand how it works basically.


I have an old 80GB WD drive in my 2nd PC. Although I think mine is a bit older than yours. This review is dated 2001. lol
WD800BB model @ 34MB/s

Do you know the model of your 80GB drive? It's marked in the small box on the label where it says MDL:, Date: and DCM:.
The 800JB version almost hit 50MB/s.

It must be the JB.

I started to write WWJD80GB. But that would have been , "what would Jesus do with 80 Gigabytes" :laugh:

I knew that wasn't right, so I just omited that part.

Pretty sure I have 2 of the 800JB EIDE drives. almost hit 50MiB/s? And my new one is like 78 or something? I'm too tired to look.

I am seriously about to die like that dude died when playing games in an internet cafe. I'm sick, I've been awake for days, and my eyes hurt like shit from staring at the screen all day.

I keep falling asleep in my chair downloading updates and shit. this sucks.

Good night hl2
 
Bigger drives = more data in the same area. Think about it.
That is true with platter size. But keep in mind total size isn't the indicator. They could very well just add another platter for more space. So a bigger drive may or may not have more density.

But yeah that helps a bit with performance. Really helps with drive capacity. Sorta like shrinking die size for chips.
 
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