High hard disk temperature

I have a intel core 2 duo iMac (the last of the white ones, IIRC.)
I installed Folding@Home on it to help cure cancer and other good stuff, and have it running almost 24/7 (I'm planning to leave it off/asleep one night a week).
iStat menus reports CPU temp at 62-ish C and hard disk at 51. Ambient temp is 25, CPU fan is going at 1509 RPM, hard drive fan going at 1200 RPM, and Optical drive fan going at 1332 RPM (or is that max capable? Because I don't have anything in the optical drive atm...)
Should I be worried about leaving my computer at these temperatures long-term?

Hi Joshz
51 C is well with most drive manufactures operating spec. of 60 C.
The first thing I would do is shutdown, vacuum and clean out the HD air intake on the back under the stand and the grill work along the bottom to be sure they are not clogged with dust. Then if the HD temp settles in at less than 50 C, I'd say your good to go.
You can tweak the iMac's over all cooling with smcFanControl...
http://www.macupdate.com/info.php/id/23049
If you do decide to use smcFanControl to run up the HD fan, my experience has been that you only need a few hundred RPM to make a difference.
Dennis

Similar Messages

High hard disk activity caused by systemd-tmpfile

Hi
I have home server PC running pure, console Archlinux on it 24/7. It works fine for about 3 years and still do, but after systemd transition I noticed that my server periodically runs systemd-tmpfile daemon which causes intensive and continuous hard disk activity.
My /etc/tmpfiles.d is empty, but here is the content of /usr/lib/tmpfiles.d folder:
-rw-r--r-- 1 root root 30 Sep 20 2012 apache.conf
-rw-r--r-- 1 root root 30 Jan 13 17:58 console.conf
-rw-r--r-- 1 root root 19 Jan 27 06:41 lastlog.conf
-rw-r--r-- 1 root root 1146 Jan 13 17:58 legacy.conf
-rw-r--r-- 1 root root 29 Feb 5 11:09 lirc.conf
-rw-r--r-- 1 root root 24 Mar 5 12:57 mpd.conf
-rw-r--r-- 1 root root 33 Feb 25 19:41 mysqld.conf
-rw-r--r-- 1 root root 27 Jan 27 09:09 nscd.conf
-rw-r--r-- 1 root root 51 Feb 25 17:32 samba.conf
-rw-r--r-- 1 root root 36 Oct 13 19:30 saslauthd.conf
-rw-r--r-- 1 root root 33 Dec 21 16:39 svnserve.conf
-rw-r--r-- 1 root root 736 Jan 13 17:58 systemd.conf
-rw-r--r-- 1 root root 449 Jan 13 17:58 tmp.conf
-rw-r--r-- 1 root root 30 Dec 13 15:24 uuidd.conf
-rw-r--r-- 1 root root 622 Jan 13 17:58 x11.conf
My question is how to know which *.conf file causes such a high HDD activity or how to resolve the problem at all?
Last edited by clovenhoof (2013-03-21 18:20:26)

Ok here is what get with "lsof -c systemd-tmpfile" during this activity:
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
systemd-t 1069 root cwd DIR 8,3 4096 2 /
systemd-t 1069 root rtd DIR 8,3 4096 2 /
systemd-t 1069 root txt REG 8,3 59504 290840 /usr/bin/systemd-tmpfiles
systemd-t 1069 root mem REG 8,3 52144 262523 /usr/lib/libnss_files-2.17.so
systemd-t 1069 root mem REG 8,3 138206 262495 /usr/lib/libpthread-2.17.so
systemd-t 1069 root mem REG 8,3 18760 277530 /usr/lib/libattr.so.1.1.0
systemd-t 1069 root mem REG 8,3 2035539 262449 /usr/lib/libc-2.17.so
systemd-t 1069 root mem REG 8,3 31744 262453 /usr/lib/librt-2.17.so
systemd-t 1069 root mem REG 8,3 16776 299945 /usr/lib/libcap.so.2.22
systemd-t 1069 root mem REG 8,3 165436 262497 /usr/lib/ld-2.17.so
systemd-t 1069 root 0r CHR 1,3 0t0 6461 /dev/null
systemd-t 1069 root 1u unix 0xffff8801393df1c0 0t0 23160 socket
systemd-t 1069 root 2u unix 0xffff8801393df1c0 0t0 23160 socket
systemd-t 1069 root 3u unix 0xffff8801393dba80 0t0 23161 socket
systemd-t 1069 root 4r DIR 8,3 9482240 1970431 /var/tmp
systemd-t 1069 root 5r DIR 8,3 4096 793638 /var/tmp/systemd-private-G25Rag

Satellite M30X - high hard disk drive utilization

After login in Windows XP (SP2), my toshiba laptop is very slow. The hard disk drive light is continuously on for 5 minutes. I've looked at the task manager, but CPU utilization is low and RAM usage is low. There is no program that seems to use a lot of CPU or RAM.
I've actually turned off the paging file to see if the problems due to intensive use of the paging file on the HDD, but problem persists. The model of the laptop is Satellite M30X-113.
I don't know if it's related, but this problem arose around the time that I've taken out a 256 MB RAM module and installed a 512 MB one (making the total ram memory 1024 MB).

Hi
> I don't know if it's related, but this problem arose around the time that I've taken out a 256 MB RAM module and installed a 512 MB one (making the total ram memory 1024 MB).
If this issue has begun after installation of the new memory module then I would say that the new memory module is responsible for this issue.
You could also try to put back the 256MB module to check if the issue still persist.
This would be the easiest way for checking

Gt70 2pc dominator Lag/stutter and high hard disk and memory usage

After Receiving the gt70 back from repairs (was repaired by msi) and installing some games my notebook started high disk usage and system responsiveness decreased very noticably i thought it was temporarily but it wasn't. When i played games i noticed stutters from time to time and i can see the hard drive Led being lit up completely when it happens, when i go to task manager i can see about 87% memory utilization but isn't about 3gb usage and hard drive being at 100% usage (even in idle most of time) and isn't using 3 mb/s, i'm not an expert with software related problems so i hope you go easy on me and thanks for your help.
EDIT: Sometimes the pc crashes and give me this notification "system thread exception not handled" i searched and says it's due to bad driver and requires booting from windows cd but obviously it is an embedded windows so i don't know what to do. Another problem which is minor is when i try to shutdown it says "please wait" and then boots into windows again, i have to restart and then shutdown or press the power button to shut it down.

You can refer the following links:
http://www.msi.com/faq/nb-740.html
http://www.msi.com/faq/nb-646.html
And also suggest to disable Windows Update, any antivirus activities, or unwanted processes.

Lenovo G550-2958 hard disk temperature

My laptop is Lenovo g550-2958
HDD: WD3200BEVT
Temperature of HDD is 45-50 Celsius, sometimes more. It' s that OK?
What is the temperature of your hdd? I use the speedfan to measure temp.
Bye

http://www.notebookcheck.net/Review-Lenovo-G550-Notebook.21568.0.html

Hard disk temperature not found

I tried sudo hdparm -H /dev/sda I get the following error
HDIO_DRIVE_CMD(hitachisensecondition) failed: Input/output error
How can I find the temperature?

Hi venky80,
try with hddtemp:
[luca@mobilebox ~]$ sudo hddtemp /dev/sda
Password:
/dev/sda: FUJITSU MHT2080AH PL: 47°C

Hard disk temperature

My HD temperature has been around 45 degrees C for the 6 years I've been using it. Suddenly it is now going up to 53 degrees C and staying there. This temperature remains even when the computer is idle.
Is there a reason for this to happen ?

I’m a bit chagrined to report the solution to my problem !
When unplugging the power cord from the back of the iMac I noticed the round fan outlet above the power cord. I’d completely forgotten about this outlet and couldn’t remember the last time I’d cleaned it. Needless to say, it was completely blocked with dust. Vacuuming it out made all the difference.
The HD temperature is now ranging between 44-47C, which is fine considering the warm weather we are having now.
Thanks for all the good information.

Which is the normal temperature of operation of the a Macbook pro 13" 2.4 GHZ core duo i5 500GB hard disk?

which is the normal temperature of operation of the a Macbook pro 13" 2.4 GHZ core duo i5 500GB hard disk? due to my laptop is very hot, arrives to 89º celcius, when I am playing a game and normal when I am internet, is of 63º to 73

Edgar F wrote:
when I am Internet, is of 63º to 73
That's too hot, for just Internet.
I can see if you just stopped playing a 3D game and then went to use the Internet you would get that sort of temps.
Try booting a cold machine, then only surfing the web, if you get 63-73 C temps, something is wrong, it should be 40-45 C.
The integrated graphics machines are hot, but yours seems too hot.
Perform a hardware check, if it says something, write it down and make a appointment
https://discussions.apple.com/docs/DOC-3046

Cold Hard Disk - iPod won't boot with bad folder icon.

I have a 5G iPod, and after a couple months of use, I found that the iPod will start to refuse to boot if it's anything less than 60ºF. I use it a lot, and right now it's cold out, around 40ºF.
We're a poor little white family up in costal Maine where the temperatures are low in the winter, around 20-40ºF. When I drive around in my Jeep Grand Cherokee, I have the heat turned up so that I'm comfortably warm, but my iPod isn't. It will play music fine when it's warmer than room temperature, but I will notice when driving, sometimes the music will just stop -- I look at the iPod and notice that the whole thing is just frozen up - no controls work, the lock doesn't show/disappear when i turn on/off the hold switch, and when I reboot it it will show that silver apple, then light the screen with a grayscale image of a 'Folder with exclamation point' icon, seemingly not finding the iPod Operating System on its hard disk. The unit will refuse to work again unless i bring it to higher temperatures. When it does work, I have to keep it under my leg when I'm driving, and that sometimes doesn't work.
It will work fine indoors, unless it's been in my bedroom overnight, which gets down to 55-60º at night (i have a room thermometer in here), which is normal for us.
Also, if I hook up the iPod to my computer, even if I force it into Disk Mode (grayscale DO NOT DISCONNECT logo), the computer has a hard time mounting it.
I can't imagine that the hard disk wasn't designed to operate in such a normal temperature range for us distant poor Maine residents. There must be something wrong with it. Will I need to send it away?
--CLL
PowerBook G4 15" Mac OS X (10.4.5) circa Nov2005

It would apear the ipod's hdd just won't power up after it shuts down on a restart

Does 24/7 operation shorten hard disk life - or not?

Does 24/7 operation shorten (external) hard disk life - or not?
I need to know. Disks keep dying.
Western Digitals in firewire LaCie boxes (not any more), now in firewire "HardBox" boxes.
Anthony
Various Macs Mac OS X (10.4.4)

Does 24/7 operation shorten (external) hard disk life
- or not?
That's a question that has been asked over the years so many times that by now you'd expect there to be a consensus on the right answer - but of course there isn't.
The answer comes down to whether or not the wear rate on the bearing is higher with steady-state constant running with continuous thrust forces and temperature, or with the varying thermal and pressure loading caused by spin up/spin down cycles. So much depends on small differences in materials and tolerances that it would probably be impossible to give an answer that is right for all drives in all situations.
What can be said is that in a purely theoretical sense, a bearing and thrust face capable of carrying the load of full speed, steady-state operation, will wear slower than the same bearing and thrust face subjected to varying loads and temperatures - conditions where not only is wear much higher, but patterns of wear more likely to cause the bearing to fail. But how these two conditions relate to each other is as much about the operating temperature in steady-state, the tolerance of the bearing/thrust face and the number of spin down/up cycles the drive would go through in what period of time.
I've got several system that run 24/7, including two PPC minis, both with Seagate drives. The older one is 26 months old and running perfectly. I've also got a G4 powermac with 3 internals which runs 24/7 and has done since it was new in late 1999. The original drive failed in 2001 and the replacement, along with the two others, has run constantly since with no problems. The original was a Quantum, the replacement was a Maxtor and the other two are Seagate. On my experience I'd say that constant running hasn't caused any sign of distress on these systems.
It has generally been my view that with competently designed components and systems, continuous steady state operation should result in lower mechanical wear and less risk of thermal stressing. If I had to make an educated guess, I'd say that the higher internal temperatures in the mini may render that a little more marginal than for larger systems, but that shouldn't impact on external drives unless poorly manufactured. I would also say that since laptops in general have no significant history of drive failures despite their far higher temperatures, there's more chance that you're the victim of bad luck that poor choice of operating regime!

RE: Apple iMac 27 Hard Disk Replacement Complaint

Dear Customer ServiceManager,
RE: Apple iMac 27” Hard Disk Replacement Complaint
On May 12, 2011, Ibought an iMac 27” for my daughter from your official Hong Kong website (www.apple.com/hk).
I am writing tocomplain about my dissatisfaction of your poorproduct quality, irresponsibleattitude of your customer service, and most importantly my painful experience with your Apple Careservice. I am also very disappointed with how your Apple Care staff made a discriminating comment about your low income Hong Kong customers.
On July 28, 2011, mydaughter received an email from your company ([email protected]) informing her that the hard disk of her newly purchased iMac wasdefective due to factory error. You promised to replace the defective hard disk with a brand new onefree of charge, but when she asked your HK Apple technical support if therewould be on-site replacement service, your staff told her that she can onlyeither carry the 30-pound iMac herself to their service center or pay HKD1200for the Apple Care which offers the on-site replacement service.
First of all, I foundyour request very unreasonable. Mydaughter was not the one who broke the hard disk, your company informed herthat you gave her a defective one. So why is the responsibility and the cost of taking the iMac for repairshould be borne by her, as an innocent customer, who paid HKD18, 000 for aniMac directly ordered from your official website? She did nothing wrong but your company required her to barethe cost of transporting a 30-pound iMac and the risk of causing damage on theway.
Secondly, I believeyour company has deceitfully forced my daughter to buy your Apple Care, whichis completely against her original will. Since she is just a 22-year-old girl, it is impossible for her to carrythe 30-pound iMac by herself. Andclearly, she was not given a choice but had to pay HKD1200 for the AppleCare. This made me doubt if thisis a scam of your company. Is thisa way of how Apple make extra money by giving your customer faulty products anda mission impossible, then forcing us to pay for a service that we did notneed?
Anyway, thepainfulness of enjoying your Apple Care service has just started…
On Aug 10, 20111:30pm, your service man came to change her hard disk with just a look as ifthe process was very ‘efficient’ and left after half an hour, even her Mac OShas not yet been completely installed. After he left, my daughter found that the OS could not be installed, soshe called your service center immediately and under her strong request, he hadto come back on the same day and check the new hard disk. He found it proved to be a defectiveone again. I was shockinglysurprised that your company, which always claims to produce products of highquality, selling at an expensive price, replaced my claim-to-be defective harddisk with a defective one again. Iwonder how Apple’s quality control is done? Your company didn’t even bother to check if the new harddisk is working before replacing it for customers.
My daughter requestedfor a new one, but then your service center said they had no new stock andasked her to wait until further notice. But without any definite date, it means my daughter’s brand new computercannot be used for… I don’t know how long. Please notice that I paid HKD18,000 to buy a first-classproduct of high quality, as claimed by your company all over the world.
So my daughter had tocall your service center again and forced them to return her original harddisk. Till 5:00 pm on the sameday, another technician came to reinstall her original hard disk into hercomputer. Surprisingly, all thedata in her original hard disk was still there, which means there is a riskthat all her personal data and information had been accessed by your servicecenter staff.
As a father, I had totake over the matter from my daughter and called your hotline 2112 0099 at5:00pm on Aug 10, 2011. After 30minutes, I could finally talk to one of your technical support staff for 10minutes about my complaint. Heasked me to hold the line and wait for him to transfer my call to his seniortechnical support colleague, so I kept on waiting for 15 minutes, but finallythe line was being cut and no body contacted me and my daughter again.
I had to call yourhotline again at 6:00 pm and waited for another 15 minutes to reach one of youradvisors. He passed my line toyour senior technical support advisor located in Singapore. He said he is just a technical supportadvisor, so he could not take my complaint directly. He needed to talk to meagain on the next day with a customer service advisor. He promised if he could not reach me onmy mobile phone, he would leave his direct line for me so that I would not haveto waste another half an hour to reach him through the hotline.
On Aug 11, 2011 5:28pm, I received a voice mail from your senior technical support advisor asking me to call him back but he didn’t leave any direct telephonenumber as he promised. So I triedto call back the caller ID, which was shown on my phone. However, the auto reply of this numberwas, “This is an invalid number”. I asked the Hong Kong Telephone Company to help me to call but even theycould not reach this number. Theytold me this number was from Shanghai, China. So I had no choice but to call your hotline again. After 25 minutes, one of your advisorstook my call and I had to repeat my story to him again in order to have him putme through to talk to your senior staff 42058 again. I asked him why he didn’t leave his direct number for me tocall him back as he promised. Hesaid he forgot! What a surprisinganswer to leave your customer nothing but a number that he knew clearlycouldn’t be reached.
By that time, I havewasted nearly 45 minutes to reach him, and it was already 6:20pm and thecustomer service advisor was off work. Therefore, I made an appointment with him again and we agreed that hewould call me between 9:31-10:00am on Aug 12, 2011 morning. I took half day-off from my work towait for your senior staff to call me.
Unfortunately, Iwaited until 10:10 am and nobody contacted me again (I left both my mobilenumber and email to them).
Finally, I called the hotline again and waited for 15 minutes, an advisor put me to your on-dutyCustomer Service Manager, Ken. After I told him my name, he realized that he should be theone responsible for calling me this morning, but since he had a meeting thatmorning, he forgot to call me again! The Apple staff didn’t keep their promises after all which disappointedme a lot. It seems to me thatApple is unwilling to accept negative feedbacks from customers.
Ken told me thatthere was nothing he could do.
At the end, I wasreferred to a Customer Relations staff, Ms. Wing Liu. Her response was also there is nothing she can do exceptgiving me a case number of my complaint. Since then, I never get any response from Apple regarding my case.
I believe Apple has afull record of all my conversations with your staff and thus, should be able tolook into my case thoroughly. Isincerely hope that Apple can take my feedback seriously and respond to my complaintin a responsible manner, but not just trying to suppress your customers, whohave already been treated unfairly, from claiming their rights. Otherwise, it is really a shamefor Apple to claim itself delivering high quality products and services allover the world.
Yours truly,
Tommy Fong
Apple Customer
<Personal Information Edited by Host>

I just realize Apple might have blocked my daughter's Apple ID from posting in your discussion forum.
My daughter was trying to go to this Community Page by logging into her account. But your Communities webpage displays a "We'll be back soon" webpage. Then I try to login with my Apple account and it works fine.
<Email Edited by Host>

Comparison of SSD with hard disk drives

Attribute or characteristic
Solid-state drive
Hard disk drive
Spin-up time
Instantaneous.
May take several seconds. With a large number of drives, spin-up may need to be staggered to limit total power drawn.
Random access time[45]
About 0.1 ms - many times faster than HDDs because data is accessed directly from the flash memory
Ranges from 5–10 ms due to the need to move the heads and wait for the data to rotate under the read/write head
Read latency time[46]
Generally low because the data can be read directly from any location; In applications where hard disk seeks are the limiting factor, this results in faster boot and application launch times (see Amdahl's law).[47]
Generally high since the mechanical components require additional time to get aligned
Consistent read performance[48]
Read performance does not change based on where data is stored on an SSD
If data is written in a fragmented way, reading back the data will have varying response times
Defragmentation
SSDs do not benefit from defragmentation because there is little benefit to reading data sequentially and any defragmentation process adds additional writes on the NAND flash that already have a limited cycle life.[49][50]
HDDs may require defragmentation after continued operations or erasing and writing data, especially involving large files or where the disk space becomes low. [51]
Acoustic levels
SSDs have no moving parts and make no sound
HDDs have moving parts (heads, spindle motor) and have varying levels of sound depending upon model
Mechanical reliability
A lack of moving parts virtually eliminates mechanical breakdowns
HDDs have many moving parts that are all subject to failure over time
Susceptibility toenvironmental factors[47][52][53]
No flying heads or rotating platters to fail as a result of shock, altitude, or vibration
The flying heads and rotating platters are generally susceptible to shock, altitude, and vibration
Magneticsusceptibility[citation needed]
No impact on flash memory
Magnets or magnetic surges can alter data on the media
Weight and size[52]
The weight of flash memory and the circuit board material are very light compared to HDDs
Higher performing HDDs require heavier components than laptop HDDs that are light, but not as light as SSDs
Parallel operation[citation needed]
Some flash controllers can have multiple flash chips reading and writing different data simultaneously
HDDs have multiple heads (one per platter) but they are connected, and share one positioning motor.
Write longevity
Solid state drives that use flash memory have a limited number of writes over the life of the drive.[54][55][56][57] SSDs based on DRAM do not have a limited number of writes.
Magnetic media do not have a limited number of writes.
Software encryption limitations
NAND flash memory cannot be overwritten, but has to be rewritten to previously erased blocks. If a software encryption program encrypts data already on the SSD, the overwritten data is still unsecured, unencrypted, and accessible (drive-based hardware encryption does not have this problem). Also data cannot be securely erased by overwriting the original file without special "Secure Erase" procedures built into the drive.[58]
HDDs can overwrite data directly on the drive in any particular sector.
Cost
As of October 2010, NAND flash SSDs cost about (US)$1.40–2.00 per GB
As of October 2010, HDDs cost about (US)$0.10/GB for 3.5 in and $0.20/GB for 2.5 in drives
Storage capacity
As of October 2010, SSDs come in different sizes up to 2TB but are typically 512GB or less[59]
As of October 2010, HDDs are typically 2-3TB or less
Read/write performance symmetry
Less expensive SSDs typically have write speeds significantly lower than their read speeds. Higher performing SSDs and those from particular manufacturers have a balanced read and write speed.[citation needed]
HDDs generally have symmetrical read and write speeds
Free block availability andTRIM
SSD write performance is significantly impacted by the availability of free, programmable blocks. Previously written data blocks that are no longer in use can be reclaimed by TRIM; however, even with TRIM, fewer free, programmable blocks translates into reduced performance.[25][60][61]
HDDs are not affected by free blocks or the operation (or lack) of the TRIM command
Power consumption
High performance flash-based SSDs generally require 1/2 to 1/3 the power of HDDs; High performance DRAM SSDs generally require as much power as HDDs and consume power when the rest of the system is shut down.[62][63]
High performance HDDs generally require between 12-18 watts; drives designed for notebook computers are typically 2 watts.

I wish I could get my head round the SSD vs HDD with a NLE rig. My builder is trying to persuade me to use a Toshiba 256Gb THNSNC256GBSJ for OS and programs, and it is only NZ$20 more expensive than the 450Gb 10k rpm VelociRaptor I was originally planing to use for the OS. That sounds suspiciously cheap to me, and I am concerned about the finite writes to SSD - mainly because I don't really understand it.
The rest of the new build is
3930K
Gigabyte X79-UD5
8 x DDR3 1600
Coolermaster with 750W PSU
Geforce GTX570
I plan to transfer the drives from my current system as a starting point, and reassess after giving it some use. That means
Either the above SSD or 450Gb 10k Raptor for OS (new drives)
300Gb 10k rpm Raptor (currently used for OS in old box)
150Gb 7k4 rpm Raptor (reserved for Photoshop Scratch in old box)
2 x 1Tb WD Blacks (data drives)
2 x 1Tb WD USB3 externals
I don't know how I would configure the drives in the new box, but have seen Harm's table and will try to follow his advice. It's a dreadful thing to admit, but I don't have a backup strategy, and the above drives are well over half full. Well over! And I am only just getting serious about video, (the rest is mainly CR2 files from my Canon 1Ds3 and 1D4)
I know it must be like banging your head against the wall, but should I avoid that SSD and go with the 450G Raptor? I have read a comment that the WD Blacks don't work well as Raid0. Is that BS or true?
I am about to give the go-ahead so need to confirm the spec.

What type of hard disk should I use if I want to use it on mac and windows?

Hey Forum,
I am using windows xp on my macbook (snow leopard). I came across some dealers who say that there are hard disks for mac only and for both mac and windows. So, I wanted to buy a hard disk so that I can use it both on mac and windows xp, so what type of hard disk should I use? Must I partition into 2?
or are there any harddisk in the market which is compatible for both mac and windows xp without screwing up the format(NTFS/Mac OS X Journaled)? Pls look into this matter and help me with it.
All of your replies and suggestions is much appreciated.
Thank you.
Ala.

Run, don't walk, from that dealer! and never look back
Once in a very long while Apple will have customized firmware on drives, and it is possible to find SCSI/SAS or drives that are destined to be used with high end storage controllers.
But that is the exception that makes the rule.
SATA is SATA. Though.... there are now SATA III drives that don't work in XP, or that need a jumper, and Seagate and some drives have managed to deliver firmware that has caused trouble... and Apple has had to issue firmware updates to help compatibility....

How do i burn idvd projects in a dvd format to an external hard disk

I have an iDVD project but it is too big to burn to a dvd (11GB!) so I was wondering if I can save the proejct like a dvd onto my External Hard Disk. This is really urgent and important for a school project.
Thanks in advance.

iDVD does not care about file size (it compresses a movie file by about 4:1 o the standard mpeg2 format), only about length.
A standard DVD will hold up to 120 minutes of video, but this includes titles, transitions etc.
iDVD encoding settings:
http://docs.info.apple.com/article.html?path=iDVD/7.0/en/11417.html
Short version:
Best Performance is for videos of up to 60 minutes
Best Quality is for videos of up to 120 minutes
Professional Quality is also for up to 120 minutes but even higher quality (and takes much longer)
That was for single-layer DVDs. Double these numbers for dual-layer DVDs.
Professional Quality: The Professional Quality option uses advanced two-pass technology to encode your video (The first pass determines which parts of the movie can be given greater compresson without quality loss and which parts can’t. The second pass then encodes those different parts accordingly) , resulting in the best quality of video possible on your burned DVD. You can select this option regardless of your project’s duration (up to 2 hours of video for a single-layer disc and 4 hours for a double-layer disc). Because Professional Quality encoding is time-consuming (requiring about twice as much time to encode a project as the High Quality option, for example) choose it only if you are not concerned about the time taken.
In both cases the maximum length includes titles, transitions and effects etc. Allow about 15 minutes for these.
You can use the amount of video in your project as a rough determination of which method to choose. If your project has an hour or less of video (for a single-layer disc), choose Best Performance. If it has between 1 and 2 hours of video (for a single-layer disc), choose High Quality. If you want the best possible encoding quality for projects that are up to 2 hours (for a single-layer disc), choose Professional Quality. This option takes about twice as long as the High Quality option, so select it only if time is not an issue for you.
Use the Capacity meter in the Project Info window (choose Project > Project Info) to determine how many minutes of video your project contains.
NOTE: With the Best Performance setting, you can turn background encoding off by choosing Advanced > “Encode in Background.” The checkmark is removed to show it’s no longer selected. Turning off background encoding can help performance if your system seems sluggish.
And whilst checking these settings in iDVD Preferences, make sure that the settings for NTSC/PAL and DV/DV Widescreen are also what you want.
http://support.apple.com/kb/HT1502?viewlocale=en_US

HP Pavilion dv4t-1300 Hard Disk Upgrade

Dear All,
I wish to upgrade my laptops Harddisk from 250 GB to 1 TB..
My laptop model is HP Pavilion dv4t-1300 CTO Entertainment Notebook PC
1) I need to know what all are hard disk compatible with my laptop
2) I need the maintenance and service guide for my laptop as i'm unable to find..
also i heard about hp laptops tatooing ....whats that ? would the new hard disk baught from outside won't work with my hp laptop ?
Many Thanks in advance for your help!!
Cheers!
Ritesh

Here is the Manual:
Manual
See Page 60
The new hard drive will work fine. Tattooing applies to motherboards, not hard drives. It needs to be a 2.5 inch wide and 7 or 9.5 mm thick SATA drive...it can be regular mechanical a hybrid or a solid state drive.
As the best bang for the buck I recommend a 7200 rpm mechanical drive like this:
http://www.newegg.com/Product/Product.aspx?Item=N82E16822145587
But if your budget is a bit bigger you can go with a number of options at higher prices.
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High hard disk temperature

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