The Question

why I see the attribute in a derivative class, if I can't access.

Jeez... what the heck is it with people posting, waiting a few minutes, and posting again if there aren't any replies. It seems that even if there are sufficient replies, they continue posting and posting -- probably because they've done so in several forums, and cannot keep track of their numerous threads.
whine, whine

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My i cloud account is locked, the e mail address I used can no longer be accessed and when I click the option to use the questions to get a new password it asked for my ID number, when I input that it tells me its wrong! now what?

I forgot my i cloud password
The e mail address i used can no longer be accessed
To access the questions way, it requires my ID number
when I input my ID number the response is ' ID number incorrect! even though I am inputting there correct number
is there any way i can resolve this?

Contact the Apple account security team for your country and ask for assistance resetting the password: Apple ID: Contacting Apple for help with Apple ID account security.

To RAID or not to RAID, that is the question

People often ask: Should I raid my disks?
The question is simple, unfortunately the answer is not. So here I'm going to give you another guide to help you decide when a raid array is advantageous and how to go about it. Notice that this guide also applies to SSD's, with the expection of the parts about mechanical failure.
What is a RAID?
RAID is the acronym for "Redundant Array of Inexpensive Disks". The concept originated at the University of Berkely in 1987 and was intended to create large storage capacity with smaller disks without the need for very expensive and reliable disks, that were very expensive at that time, often a tenfold of smaller disks. Today prices of hard disks have fallen so much that it often is more attractive to buy a single 1 TB disk than two 500 GB disks. That is the reason that today RAID is often described as "Redundant Array of Independent Disks".
The idea behind RAID is to have a number of disks co-operate in such a way that it looks like one big disk. Note that 'Spanning' is not in any way comparable to RAID, it is just a way, like inverse partitioning, to extend the base partition to use multiple disks, without changing the method of reading and writing to that extended partition.
Why use a RAID?
Now with these lower disks prices today, why would a video editor consider a raid array? There are two reasons:
1. Redundancy (or security)
2. Performance
Notice that it can be a combination of both reasons, it is not an 'either/or' reason.
Does a video editor need RAID?
No, if the above two reasons, redundancy and performance are not relevant. Yes if either or both reasons are relevant.
Re 1. Redundancy
Every mechanical disk will eventually fail, sometimes on the first day of use, sometimes only after several years of usage. When that happens, all data on that disk are lost and the only solution is to get a new disk and recreate the data from a backup (if you have one) or through tedious and time-consuming work. If that does not bother you and you can spare the time to recreate the data that were lost, then redundancy is not an issue for you. Keep in mind that disk failures often occur at inconvenient moments, on a weekend when the shops are closed and you can't get a replacement disk, or when you have a tight deadline.
Re 2. Performance
Opponents of RAID will often say that any modern disk is fast enough for video editing and they are right, but only to a certain extent. As fill rates of disks go up, performance goes down, sometimes by 50%. As the number of disk activities on the disk go up , like accessing (reading or writing) pagefile, media cache, previews, media, project file, output file, performance goes down the drain. The more tracks you have in your project, the more strain is put on your disk. 10 tracks require 10 times the bandwidth of a single track. The more applications you have open, the more your pagefile is used. This is especially apparent on systems with limited memory.
The following chart shows how fill rates on a single disk will impact performance:
Remember that I said previously the idea behind RAID is to have a number of disks co-operate in such a way that it looks like one big disk. That means a RAID will not fill up as fast as a single disk and not experience the same performance degradation.
RAID basics
Now that we have established the reasons why people may consider RAID, let's have a look at some of the basics.
Single or Multiple?
There are three methods to configure a RAID array: mirroring, striping and parity check. These are called levels and levels are subdivided in single or multiple levels, depending on the method used. A single level RAID0 is striping only and a multiple level RAID15 is a combination of mirroring (1) and parity check (5). Multiple levels are designated by combining two single levels, like a multiple RAID10, which is a combination of single level RAID0 with a single level RAID1.
Hardware or Software?
The difference is quite simple: hardware RAID controllers have their own processor and usually their own cache. Software RAID controllers use the CPU and the RAM on the motherboard. Hardware controllers are faster but also more expensive. For RAID levels without parity check like Raid0, Raid1 and Raid10 software controllers are quite good with a fast PC.
The common Promise and Highpoint cards are all software controllers that (mis)use the CPU and RAM memory. Real hardware RAID controllers all use their own IOP (I/O Processor) and cache (ever wondered why these hardware controllers are expensive?).
There are two kinds of software RAID's. One is controlled by the BIOS/drivers (like Promise/Highpoint) and the other is solely OS dependent. The first kind can be booted from, the second one can only be accessed after the OS has started. In performance terms they do not differ significantly.
For the technically inclined: Cluster size, Block size and Chunk size
In short: Cluster size applies to the partition and Block or Stripe size applies to the array.
With a cluster size of 4 KB, data are distributed across the partition in 4 KB parts. Suppose you have a 10 KB file, three full clusters will be occupied: 4 KB - 4 KB - 2 KB. The remaining 2 KB is called slackspace and can not be used by other files. With a block size (stripe) of 64 KB, data are distributed across the array disks in 64 KB parts. Suppose you have a 200 KB file, the first part of 64 KB is located on disk A, the second 64 KB is located on disk B, the third 64 KB is located on disk C and the remaining 8 KB on disk D. Here there is no slackspace, because the block size is subdivided into clusters. When working with audio/video material a large block size is faster than smaller block size. Working with smaller files a smaller block size is preferred.
Sometimes you have an option to set 'Chunk size', depending on the controller. It is the minimal size of a data request from the controller to a disk in the array and only useful when striping is used. Suppose you have a block size of 16 KB and you want to read a 1 MB file. The controller needs to read 64 times a block of 16 KB. With a chunk size of 32 KB the first two blocks will be read from the first disk, the next two blocks from the next disk, and so on. If the chunk size is 128 KB. the first 8 blocks will be read from the first disk, the next 8 block from the second disk, etcetera. Smaller chunks are advisable with smaller filer, larger chunks are better for larger (audio/video) files.
RAID Levels
For a full explanation of various RAID levels, look here: http://www.acnc.com/04_01_00/html
What are the benefits of each RAID level for video editing and what are the risks and benefits of each level to help you achieve better redundancy and/or better performance? I will try to summarize them below.
RAID0
The Band AID of RAID. There is no redundancy! There is a risk of losing all data that is a multiplier of the number of disks in the array. A 2 disk array carries twice the risk over a single disk, a X disk array carries X times the risk of losing it all.
A RAID0 is perfectly OK for data that you will not worry about if you lose them. Like pagefile, media cache, previews or rendered files. It may be a hassle if you have media files on it, because it requires recapturing, but not the end-of-the-world. It will be disastrous for project files.
Performance wise a RAID0 is almost X times as fast as a single disk, X being the number of disks in the array.
RAID1
The RAID level for the paranoid. It gives no performance gain whatsoever. It gives you redundancy, at the cost of a disk. If you are meticulous about backups and make them all the time, RAID1 may be a better solution, because you can never forget to make a backup, you can restore instantly. Remember backups require a disk as well. This RAID1 level can only be advised for the C drive IMO if you do not have any trust in the reliability of modern-day disks. It is of no use for video editing.
RAID3
The RAID level for video editors. There is redundancy! There is only a small performance hit when rebuilding an array after a disk failure due to the dedicated parity disk. There is quite a perfomance gain achieveable, but the drawback is that it requires a hardware controller from Areca. You could do worse, but apart from it being the Rolls-Royce amongst the hardware controllers, it is expensive like the car.
Performance wise it will achieve around 85% (X-1) on reads and 60% (X-1) on writes over a single disk with X being the number of disks in the array. So with a 6 disk array in RAID3, you get around 0.85x (6-1) = 425% the performance of a single disk on reads and 300% on writes.
RAID5 & RAID6
The RAID level for non-video applications with distributed parity. This makes for a somewhat severe hit in performance in case of a disk failure. The double parity in RAID6 makes it ideal for NAS applications.
The performance gain is slightly lower than with a RAID3. RAID6 requires a dedicated hardware controller, RAID5 can be run on a software controller but the CPU overhead negates to a large extent the performance gain.
RAID10
The RAID level for paranoids in a hurry. It delivers the same redundancy as RAID 1, but since it is a multilevel RAID, combined with a RAID0, delivers twice the performance of a single disk at four times the cost, apart from the controller. The main advantage is that you can have two disk failures at the same time without losing data, but what are the chances of that happening?
RAID30, 50 & 60
Just striped arrays of RAID 3, 5 or 6 which doubles the speed while keeping redundancy at the same level.
EXTRAS
RAID level 0 is striping, RAID level 1 is mirroring and RAID levels 3, 5 & 6 are parity check methods. For parity check methods, dedicated controllers offer the possibility of defining a hot-spare disk. A hot-spare disk is an extra disk that does not belong to the array, but is instantly available to take over from a failed disk in the array. Suppose you have a 6 disk RAID3 array with a single hot-spare disk and assume one disk fails. What happens? The data on the failed disk can be reconstructed in the background, while you keep working with negligeable impact on performance, to the hot-spare. In mere minutes your system is back at the performance level you were before the disk failure. Sometime later you take out the failed drive, replace it for a new drive and define that as the new hot-spare.
As stated earlier, dedicated hardware controllers use their own IOP and their own cache instead of using the memory on the mobo. The larger the cache on the controller, the better the performance, but the main benefits of cache memory are when handling random R+W activities. For sequential activities, like with video editing it does not pay to use more than 2 GB of cache maximum.
REDUNDANCY(or security)
Not using RAID entails the risk of a drive failing and losing all data. The same applies to using RAID0 (or better said AID0), only multiplied by the number of disks in the array.
RAID1 or 10 overcomes that risk by offering a mirror, an instant backup in case of failure at high cost.
RAID3, 5 or 6 offers protection for disk failure by reconstructing the lost data in the background (1 disk for RAID3 & 5, 2 disks for RAID6) while continuing your work. This is even enhanced by the use of hot-spares (a double assurance).
PERFORMANCE
RAID0 offers the best performance increase over a single disk, followed by RAID3, then RAID5 amd finally RAID6. RAID1 does not offer any performance increase.
Hardware RAID controllers offer the best performance and the best options (like adjustable block/stripe size and hot-spares), but they are costly.
SUMMARY
If you only have 3 or 4 disks in total, forget about RAID. Set them up as individual disks, or the better alternative, get more disks for better redundancy and better performance. What does it cost today to buy an extra disk when compared to the downtime you have when a single disk fails?
If you have room for at least 4 or more disks, apart from the OS disk, consider a RAID3 if you have an Areca controller, otherwise consider a RAID5.
If you have even more disks, consider a multilevel array by striping a parity check array to form a RAID30, 50 or 60.
If you can afford the investment get an Areca controller with battery backup module (BBM) and 2 GB of cache. Avoid as much as possible the use of software raids, especially under Windows if you can.
RAID, if properly configured will give you added redundancy (or security) to protect you from disk failure while you can continue working and will give you increased performance.
Look carefully at this chart to see what a properly configured RAID can do to performance and compare it to the earlier single disk chart to see the performance difference, while taking into consideration that you can have one disks (in each array) fail at the same time without data loss:
Hope this helps in deciding whether RAID is worthwhile for you.
WARNING: If you have a power outage without a UPS, all bets are off.
A power outage can destroy the contents of all your disks if you don't have a proper UPS. A BBM may not be sufficient to help in that case.

Harm,
thanks for your comment.
Your understanding was absolutely right.
Sorry my mistake its QNAP 639 PRO, populated with 5 1TB, one is empty.
So for my understanding, in my configuration you suggest NOT to use RAID-0. Im not willing to have more drives in my workstation becouse if my projekts are finished, i archiv on QNAP or archiv on other external drive.
My only intention is to have as much speed and as much performance as possible during developing a projekt
BTW QNAP i also use as media-center in combination with Sony PS3 to run the encoded files.
For my final understanding:
C: i understand
D: i understand
E and F: does it mean, when i create a projekt on E, all my captured and project-used MPEG - files should be situated in F? Or which media in F you mean?
Following your suggestions in want to rebulid Harms-Best Vista64-Benchmark comp to reach maximum speed and performance. Can i use in general the those hardware components (exept so many HD drives and exept Areca raid controller ) in my drive configuration C to F. Or would you suggest some changings in my situation?

Trying to download mountain lion, but when I try to download it, asks me security questions I dont remember the answers to, so I reset the questions, but old ones still pop up when I try to download mountain lion. How do I change the questions for good?

I dont get why it asks me for my password and two security questions when just buying something from the app store, but the questions wont change.

The Three Best Alternatives for Security Questions and Rescue Mail
    1. Use Apple's Express Lane.
          Go to https://expresslane.apple.com ; click 'See all products and services' at the
          bottom of the page. In the next page click 'More Products and Services, then
          'Apple ID'. In the next page select 'Other Apple ID Topics' then 'Forgotten Apple
          ID security questions' and click 'Continue'. Please be patient waiting for the return
          phone call. It will come in time depending on how heavily the servers are being hit.
     2. Call Apple Support in your country: Customer Service: Contact Apple support.
     3. Rescue email address and how to reset Apple ID security questions.
A substitute for using the security questions is to use 2-step verification:
Two-step verification FAQ Get answers to frequently asked questions about two-step verification for Apple ID.

I need to know all the questions below. I had to restore my computer to original state and now even if I sign on it won't let me sync my ipad or iphone. the message is that it is synced to another library and it could wipe out my data on the ipad.

I need to know all the questions below. I had to restore my computer to original state and now even if I sign on it won't let me sync my ipad or iphone. the message is that it is synced to another library and it could wipe out my data on the ipad. Am I understanding correctly? I am running Windows 7 but have never had any problems. Thanks

You need iTunes on the computer. There is no iTunes for your phone. See:
Locked Out, Forgot Lock or Restrictions Passcode, or Need to Restore Your Device: Several Alternative Solutions
1. iOS- Forgotten passcode or device disabled after entering wrong passcode
2. iPhone, iPad, iPod touch: Wrong passcode results in red disabled screen
3. Restoring iPod touch after forgotten passcode
4. What to Do If You've Forgotten Your iPhone's Passcode
5. iOS- Understanding passcodes
6. iTunes 10 for Mac- Update and restore software on iPod, iPhone, or iPad
Forgotten Restrictions Passcode Help
You will need to restore your device as New to remove a Restrictions passcode. Go through the normal process to restore your device, but when you see the options to restore as New or from a backup, be sure to choose New.
Also, see iTunes- Restoring iOS software.

Why don't the questions as reported in forms match the order of questions on the pdf form used to collect the data?

I imported a PDF from for my survey. Then, I distributed it. People have completed it and the results have been submitted back to my FormsCentral account. The first two questions are text entry, then there are two 6 option multiple-choice questions before a 3 option multiple choice question. Why is it that in the report gives me results from four 6-option multiple choice questions before the 3-option question when there are only two? To make matters worse, the questions aren't coded with the text of the questions. They're coded cryptically, as are the responses. What the heck is going on and can I fix this?

Drew:
I'm having trouble deciphering what you wrote: "As I said, the initial order seems somewhat arbitrary from the user's perspective." As I work in the political arena, I'm parsing this out. It's either a brilliantly worded "you're screwed" statement, or there is some ambiguity and hope here. Let's deconstruct:
"initial order" Does this mean the order of my questions in the survey? There's nothing arbitrary about them. I know the order of my questions
"somewhat arbitrary" Does this mean there's actually some order to the way the results are being outputted? If so, how do I determine that order?
"from the user's perspective." Is there another perspective from which the actual (original/initial) ordering of the questions can be resurrected?
I'm not trying to badger. That's not my intent. You have a user here who is reading hope from your words, and I'm trying to distinguish between real hope and a nice way of saying "SOL."
So:
Answer One: There is some hope
Answer Two: SOL
After this, I can mark the question. Thank you.
Glenn

After clicking "yes" to the question "do you want to update itunes now", i waited 2 hours and 15 minutes and it was still "loading". i turned computer off thinking something was wrong. now itunes won't open at all. do i need to download itunes again?

after clicking "yes" to the question "do you want to update itunes now", i waited 2 hours and 15 minutes and it was still "loading". i turned computer off thinking something was wrong. now itunes won't open at all. do i need to download itunes again?

Did you actually download the installer from Apple or did you use Software Update. You can download the installer http://www.apple.com/itunes/download/
Maybe I'm old fashioned but I would consider repairing permissions first using Disk Utility because something caused this to go wrong the first time. And of course make a backup of your whole library first. It shouldn't happen but some have complained about their libraries being wiped out by iTunes updates. Better safe...

Every time I try to purchase a song from itunes, it says I have to put in security questions and answer them, which it's never done before. Then after I do the questions, it says that an error occurred and my changes couldn't be saved. HELP!

Every time I try to purchase a song from itunes, it says I have to put in security questions and answer them, which it's never done before. Then after I do the questions, it says that an error occurred and my changes couldn't be saved. It has been doing this for weeks, and I can't purchase anything! HELP!

Hi mterry1723, one solution that might be worth trying is this:
- Close iTunes, if it's open
- Open Safari and got to 'Preferences'
- Select 'Security' on the top
- Untick all the security options in the menu
- Click the 'Show Cookies' button and look for all the 'apple' entries in the left-hand column.
- Highlight them (select them collectively) and press 'Remove'
- Now open iTunes and buy the song as usual.
- You may be asked to do the same security process as before, so do as asked.
- Hopefully, the security check will now have accepted your answers and start downloading the song as normal.
Remember to re-tick all the required security options you had just un-ticked in Safari preferences. You don't need to bother about opening the cookies again.
I hope this has worked for you and my profoundest apologies if it has not. Worth a go, though!
I did see this thread: https://discussions.apple.com/message/18259935#18259935 which may be of more help, mainly the last entry by 'c2boyd'
Message was edited by: Bongomal

I keep getting the little blue box with the question mark

Hi
I have 10.6.7 system software and my safari is 5.0.4
I have called apple twice with this problem already but nothing has helped except for short times.
I have reset safari about one dozen times and when I do I reset the top 7 items and I've emptied the cache in addition just in case. I've also taken my safari preference plist out of my library and trashed it.
And I've run disk utilities many times and restarted my computer. Each thing I do will solve the problem for a short time, even up to a day or more (or less) but then it comes back. For instance on Facebook maybe 1/8th of the thumbnail images have the little blue boxes with the question marks but most don't. I can't figure it out. Sometimes even the iPAD safari gets them too but my firefox doesn't show them and neither does Safari on my eMac.
Yesterday the question marks even showed up in ONE mailing on all 3 computers with the question marks in the blue boxes (meaning my iMac, my eMac and my iPad) but then it just all resolved after a few hours. This does sound like possibly a server problem except today it's happening (in Safari again) only on this iMac in Safari (not firefox) and not on the other two devices.
One more thing, since they changed my radio on the roof for my wireless internet, the 5.8 phone cuts out the internet when I use it. The problem has gotten worse since they changed the radio to the same frequency as the phone, it's a much faster service than the 2.4 radio. I don't know if this is related or not.
Thank you,
Martha

<Contact your ISP.
Is it possible, Carolyn, that this would mainly and almost always be only affecting the iMac and Safari in the iMac if it were a server issue? Right now Safari has more blue boxes with question marks than ever and the eMac and iPad have none. Firefox on the iMac has none also.
I should try a direct connection and by pass the router and see if that makes a difference.
I will contact them tomorrow but I want to get clear in my head first all the facts and possibilities.
Thanks!
Martha

I seem to not enter the correct answers to my security questions for itunes to buy an in-app purchase and also cannot answer the questions exactly like i answered them when creating the account for my ipod, how do i find out what answers i put

I seem to not enter the correct answers to my security questions for itunes to buy an in-app purchase and also cannot answer the questions exactly like i answered them when creating the account for my ipod, how do i find out what answers i put for my ipod touch and itunes?

Try these previous discusssions:
recover answers to security questions: Apple Support Communities
how do i change apple ID security...: Apple Support Communities

How do I change my security questions and answers without setting up a new account. I can't remember the answers to the questions that they ask.

How do I change my security questions and answers without setting up a new account. I can't remember the answers to the questions that they ask.

1. See my User Tip for some help: Some Solutions for Resetting Forgotten Security Questions: Apple Support Communities.
2. Here are two different but direct methods:
    a. Send Apple an email request at: Apple - Support - iTunes Store - Contact Us.
    b. Call Apple Support in your country: Customer Service: Contacting Apple for support
        and service.
3. For other queries about Apple ID see Frequently asked questions about Apple ID.
4. Rescue email address and how to reset Apple ID security questions
5. For online assistance use Apple - Support - Express Lane

The App Store want allow me to download new apps because I have not set up security questions.But I share an iTunes account with my friend. So if I set up the questions will my friend have to use and answer the same thing?

The App Store want allow me to download new apps because I have not set up security questions.But I share an iTunes account with my friend. So if I set up the questions will my friend have to use and answer the same thing?

They will have to be answered the first time when purchasing from a new computer or device.

How can I find a list of the questions I have made in the past?

I have found this list to be invaluable. It has saved me a great deal of time. Unfortunately, I see that it is no longer there when I log in. If it is a feature that has not been discontinued by the Apple Community Forum, how do I get it back?

babowa wrote:
You might want to bookmark this:
Niku
This link shows the questions you asked; you can also choose the "participated".
That did it. I'd rather have them present when I Iog in, but that's good enough. Thanks. Oh, yes, "participated".That also looks like it will be valuable.

HT204088 Dear sirs, Could you please help me on my problem with my apple ID I create new account with security questions, and when I try to purchase paid application,it ask me for answers the questions but it's not working, My account have 50$ and stil

Dear sirs,
Could you please help me on my problem with my apple ID
I create new account with security questions, and when I try to purchase paid application,it ask me for answers the questions but it's not working,
My account have 50$ and still didn't buy anything

You need to ask Apple to reset your security questions; ways of contacting them include clicking here and picking a method for your country, phoning AppleCare and asking for the Account Security team, and filling out and submitting this form.
(100546)

This is my first use of this program. How do I remove a page break? How do line up my drop down box along side the text box on the left of it? The drop down is for a multiple choice answer for the question to the left.

This is my first use of this program. How do I remove a page break? How do line up my drop down box along side the text box on the left of it? The drop down is for a multiple choice answer for the question to the left of each drop down.

See McAfee support to find out how to disable that McAfee feature - that isn't part of the normal Firefox installation.

HT5624 how do I change the security questions on my daughters itunes account. I do not remember adding the questions and they do not make sence to me. can not figure out how to get to her email account that it is showing for her altern

I cant seem to be able to change the secutity questions on my minor daughters itunes account. I set the account up but I do not remember adding the security questions and they do not make sense to me. It says that the alternate account it would be sent to is@ me.com but I can not figure our how to get to it to retreive the email to reset the questions. My daughters account may have recently been hacked so I am trying to change all passwords. I changed the itunes account and added another email but I still can not change security questions in case I ever need them.
<Email Edited by Host>

We are fellow users here on these user-to-user forums, you're not talking to iTunes Support nor Apple - I've asked the hosts to remove your email address from your post (it's not a good idea to post personal info on any public forum).
The reset link on an account will only show if there is a rescue email address on it, alternate email addresses are different and not used for resetting them. If she has a rescue email address on her account then steps 1 to 5 half-way down this page will give you a reset link on the account : http://support.apple.com/kb/HT5312
Navigate to appleid.apple.com using your web browser.
Click "Manage your account"
When prompted, sign in using your Apple ID and password.
Click Password & Security
You'll be asked to answer 2 of your 3 security questions before you can make any modifications. If you are unable to remember your answers, you can choose to send an email to your rescue email to reset your security questions.
If she doesn't have a rescue email address (you won't be able to add one until you can answer your questions) then you will need to contact Support in your country to get the questions reset.
Contacting Apple about account security : http://support.apple.com/kb/HT5699
When they've been reset (and if you don't already have a rescue email address) you can then use steps 1 to 7 half-way down the HT5312 link above to add a rescue email address for potential future use

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