How long can HDD survive without power. I have three Samsung HD103SJ HDDs none of them were powered for few years. I took them from RAID 5 array and all of them were functional. Now I tried to make new RAD 5 array but they are death. All of them.  Im not asking about data retention.  I thought maybe some electrolyte capacitor died or some internal batery that helps actuator arm to get in safe position after sudden power off.
What lifetime can be expected of the typical hard disk? Or are there big differences between different types? And does it make a difference if it is used heavily instead of never being connected to system (for example serving as a backup medium)?
How do I find out word count in pages 5.2.2 I often write short articles and am limited to 100 words per document.   Can I find word counts in pages 5.2.2? Expressing an opinion: to me or for me? Which one should be used?      To me, it makes no difference, but I'm not really sure why.   vs     For me, it makes no difference, but I'm not really sure why. Will the Windows 10 Free Upgrade stay in the Professional channel? Fortran IF statement with numbers/labels rather than another statement How to move 100 files from a folder containing thousands? I have a directory with thousands of files. How can I move 100 of the files (any files will do) to another location. How to set up USB for Virtualbox? I'm using Ubuntu Maverick and Virtual Box 3+. I have Windows 7 Ultimate. The problem is that it doesn't detect USB drives in Windows 7, but USB peripherals (mouse + keybord) are working.  I followed , but I can't find the user group vboxusers. How can I continue? I would also like to upgrade to the latest version without any risk (without losing my virtual hard disk drive). How do I figure out if someone is a first cousin, second cousin, cousin once-removed, etc? Merging multiple vector layers to one layer using QGIS What does it mean by 'bringing him gasping to all fours' in Harry potter? Immediately, his insides started writhing as though he'd just swallowed live snakes -- doubled up, he wondered whether he was going to be sick -- then a burning sensation spread rapidly form his stomach to the very ends of his fingers and toes -- next, bringing him gasping to all fours, came to a horrible melting feeling, as the skin all over his body bubbled like hot wax -- and before their eyes, his hands began to grow, the fingers thickened, the knuckles were bulging like bolts -- his shoulders stretched painfully and a prickling on his forehead told him that his hair was creeping down toward his eyebrows -- his robes ripped as his chest expanded like a barrel bursting its hoops -- his feet were agony in shoes four sizes too small      Harry potter and the chamber of secrets   It is the description of the feeling of drinking Polyjuice Potion, which makes someone into a different person, from the point of view of Harry Potter turning into Gregory Goyle.  And I don't understand what 'bring him gasping to all fours' means, especially 'four'. Does four here mean number 4? What are the transactional costs when buying and selling a house? How do I reenable Quack Overflow if I disabled it? How to calculate the sum of the data that have the same ID in the first column? I want to sum the values of the rows of my data that have the same ID in the first column. My data looks like   data.txt  Id    a    b    c    d    e 1     1    2    3    4    5 1     2    3    4    5    6 1     3    4    5    6    7 2     4    5    6    7    8 2     5    6    7    8    9 2     6    7    8    9    10 3     7    8    9   10    11 3     8    9    10  11    12 3     9    10   11  12    13 3     10   11   12  13    14 4     11   12   13  14    15 4     12   13   14  15    16 5     13   14   15  16    17 5     14   15   16  17    18   Required results  out.txt  Id    a     b   c   d   e 1     6     9   12  15  18 2     15    18  21  24  27 3     34    38  42  46  50 4     23    25  27  29  31 5     27    29  31  33  35 Where To start Learning With Salesforce Development Workflow for converting LaTeX into Open Office / MS Word Format "Install VMware Tools" greyed out after installing ubuntu 15.04 on vmware player 7.1 "Install VMware Tools" greyed out after installing Ubuntu 15.04 on VMware Player 7.1. I tried checking "No proxy" instead of default "Windows proxy settings" at "File->Preferences->Software updates-> Connection Settings". This did not work either. Is there a way to install VMware Tools? Render just part of a final image from Cycles? Calculating the limit $\lim((n!)^{1/n})$ Find $\lim_{n\to\infty} ((n!)^{1/n})$. The question seemed rather simple at first, and then I realized I was not sure how to properly deal with this at all. My attempt: take the logarithm,  $$\lim_{n\to\infty} \ln((n!)^{1/n}) =  \lim_{n\to\infty} (1/n)\ln(n!) =  \lim_{n\to\infty} (\ln(n!)/n)$$ Applying L'hopital's rule:  $$\lim_{n\to\infty} [n! (-\gamma + \sum(1/k))]/n! = \lim_{n\to\infty} (-\gamma + \sum(1/k))=  \lim_{n\to\infty} (-(\lim(\sum(1/k) - \ln(n)) + \sum(1/k))  = \lim_{n\to\infty} (\ln(n) + \sum(1/k)-\sum(1/k)  = \lim_{n\to\infty} (\ln(n))$$ I proceeded to expand the $\ln(n)$ out into Maclaurin form $$\lim_{n\to\infty} (n + (n^2/2)+...) = \infty$$ Since I $\ln$'ed in the beginning, I proceeded to e the infinity  $$= e^\infty  = \infty$$  So am I write in how I approached this or am I just not on the right track? I know it diverges, I was just wanted to try my best to explicitly show it. A game called  is making rounds on social media. I am trying to determine the maximum score attainable for this game.  Let's assume WLOG that only 2s are returned (if 4s are possible the max score is doubled).  First, I'll relax some of the rules to create a game, $\mathcal{G}$, that can achieve a score at least as high as the original, 2048 game.  A run $R$  of $\mathcal{G}_n$ consists of a sequence of moves $m_1,\ldots,m_k$ which manipulate a multiset, $\mathcal{S}$ of maximum size n.  Each $m_i$ is either:   a put $p$, which inserts a 2 into $\mathcal{S}$, or a merge, $\alpha_i$, which replaces two $2^i$ elements from $\mathcal{S}$ with a single $2^{i+1}$ elt.   I allow sequential moves of the same type because 2048 allows multiple merges or no-merge turns.  The score of a position is the sum of $\mathcal{S}$.  What is the maximum score possible on a game of order n?  Note: The final position must have only unique values, else a merge and put would be possible in increase score.  I claim it is $\sum_{i=1}^{n} 2^i$, but couldn't come up with any good induction arguments.  It's pretty easy to prove that an element $2^k$ is producible in a game $\mathcal{G}_k$, but proving an upper bound for production got a bit hairy, and also doesn't cover the full space. The performance impact of using instanceof in Java What factors determine enemy levels or: How do enemy levels scale to the player character's? When I finished Normal Mode at around Level 30 and went back to the  (still at Normal mode), I found that all enemies there are now very easy to kill, meaning they didn't level up (or hit a level cap).  When I went to  as a Level 36 character in True Vault Hunter Mode, I noticed that the enemies are the same level as me.  What factors determine enemy levels?   Specifically, I would like to know:       Are enemies affected by what level a character accepted a mission?      Or is it what level a character is when they first entered an area?      How does Normal Mode, True Vault Hunter mode, and the Ultimate True Vault Hunter Mode affect enemy levels?     Are there enemies that will scale to the player level, as the player levels up? Any enemy leveling differences specific to the DLC areas?         EDIT:   There is now  that explains how this works generally: "In playthrough 1, outside of the DLC, there's no such thing as scaling. Enemy levels are determined solely by the area they're in and your mission." Can anyone expound on that, and comment or provide an answer on what are the specific enemy levels on specific areas and/or missions?    states that "enemies do not actually "scale", or at least from what we know of..." and lists specifics for enemy levels on certain areas in the game (sans DLC areas). Can anyone expound on that and/or add specifics for enemy levels in the DLC missions or areas in TVHM (PT 2.0) and/or UTVHM? The  update has just been released, can anyone provide info about enemy levels on that mode, including the DLC areas or missions?