Hard drive questions

[DoFoT9]

If you install the HD yourself, you void your warranty right?
How much is it for Apple to install it for you at the store?

NO lol.

it doesnt void warranty at all!!! go have fun, do it yourself (just dont stuff it up at all!).

p.s. sushi ill reply to you when i have spare time (sorry), got this assignment to finish!

 

[sushi]

hey sushi i guess you live in japan?

Yep.

i just ordered that samsung drive as well, it was the cheapest 500gig drive here.
i should have it tomorrow i hope.
anyway if i get 3 years out of it. i'll be wrapped. by then i'll be needing a new drive. hopefully 1tb

Same here. My next HD upgrade will be 1TB. I plan on skipping the 750GB models.

If you install the HD yourself, you void your warranty right?

Old models:
- MB --> No.
- MBP --> Yes, because you open up the case.

New models, you can do yourself.

How much is it for Apple to install it for you at the store?

They won't do it for any model after sale AFAIK.

p.s. sushi ill reply to you when i have spare time (sorry), got this assignment to finish!

No worries.

I look forward to your reply.

 

[steve31]

Just got a seagate 320gb 7200 rpm HD today and dropped it in my MB. It was VERY easy to do. Very fast! Not sure about what the effect will be on battery life.

 

[clyde2801]

show you mine...

Just got a seagate 320gb 7200 rpm HD today and dropped it in my MB. It was VERY easy to do. Very fast! Not sure about what the effect will be on battery life.

I dropped the wd 7200 in mine, along with 4 gig ram. What's your xbench score?

 

[steve31]

I dropped the wd 7200 in mine, along with 4 gig ram. What's your xbench score?

Have not had a chance yet to try but will post when I do. Also I noticed that the battery life is a bit less and i can feel a slight vibration with this hard drive. You?

 

[LED]

Have not had a chance yet to try but will post when I do. Also I noticed that the battery life is a bit less and i can feel a slight vibration with this hard drive. You?

Hey guys, I've tried 2 different 7200 rpm drives (WD and Hitachi) and both produced vibration on the palmrest. The WD was bad (returned for refund), and the Hitachi, while much better, still causes slight vibration. I've given up and bought a 5400. Anyway, I'm also interested in the XBench results for the drive.

 

[DoFoT9]

Sushi, i FINALLY got back to replying!!! one more day left then 2 weeks of exams then 4 months off, gotta love the uni life.

Normally, I have external HD at twice the capacity of the Internal that I am backing (cloning).

So my MBP15 has a 500GB HD. I have an external inclosure that contains two 500GB HDs. I alternate cloning using Carbon Copy Cloner (CCC) between the two on a weekly basis.

This is my main workhorse so files change a lot on it.

Aahh i see, thats a very good idea, so that will take you back two weeks.

A question(this is only valid if your using say 200gb of your main workhorse computer): why do you do a full clone of your hard drive, when you could use Time Capsule to pretty much do a clone of your home directories and user permissions/files etcetc?? I guess I can understand that you would want an exact copy of your HD, for me its not really a big issue as Time Capsule works fine for my needs. I'm asking just because I want to see your view so yea...

Close.

You are correct in stating that bits (1's and 0's) are written to the HD. However, we must look deeper at the situation.

The bits take space. Let's say a bit takes the space of a piece of Letter sized paper. So 8 sheets would represent 8 bits, or a typical byte.

On the sheet of Letter sized paper, you place 100 pennies. Some are heads and some are tails. These pennies represent the magnetic particles within the bit area. In the real world, the number of magnetic particles are much higher and vary slightly in number. I'm just using 100 for this example.

The heads/tails situation you described; are there only two possibilities that can be written onto the "Letter size page"? If so then piece of paper is made up of tiny bits itself, making the bigger bit? That's very confusing haha.

The magnetic particles provide a readable response to the reading head of the HD.

If the number of heads showing is 60 or more, then the bit is considered "1". Where as if the number of heads showing 59 or less, then the bit is considered a "0".

So Between 55 to 65, you might need to count twice to make sure. Between 58 and 61, you may need to count three times to make sure.

When a HD needs to do this, it slows down data reading (or verifying after writing).

So if I could exercise, if you will, the magnetic particles within the bit, so that if I wanted a "1" there would be say 90-100 heads or if I wanted a "0" then 0-10 heads. This would make counting much easier.

This is what SpinRite attempts to do in exercising the magnetic particles within each bit. SpinRite has a cool display showing this process in action, and you can see the improvement on screen.

That makes perfect sense! I had no idea that there was so many different possibilities within the HD. I just thought that the head wrote a magnetic "bit" over the top of the previous magnetic "bit", but it goes much much deeper then that, as I now know.

I would love to read into this even further, I might have to search for some extra information on the Internet. This stuff absolutely amazes me!

SpinRite really is an awsome program. Thanks so much for your help Sushi

On a side note, a couple years ago, HDs jumped in capacity since they went to perpendicular storage. Here is a fun animation of the change.

I have seen that ad before! It is very helpful, thanks for the link .

DoFoT9