Time Machine: I accidentally disassembled the external hard drive and now I want to reassemble it

So I had the 4TB Seagate external expansion unit, and at one point I ended up selecting disassemble in Disc Utility when I tried to run first aid.

Now I want to mount it again, I tried to press the mount button on Disk Utility. No response.

I tried to eject, disassemble and reassemble the backup unit in the Terminal through:

  1. disk eject / dev / disk3s2
  2. diskutil unmountDisk / dev / disk3s2
  3. diskutil mount / dev / disk3s2

The resulting answer is:

  1. Waiting time was exhausted while waiting for expulsion.
  2. The dismantling of all volumes on disk 3 was successful
  3. The volume on disk3s2 timed out to mount

To the extent that the hardware flickers, I suppose it is functional. I would just like to ask if there is any possible solution, or I should click on the mount button and wait, thanks.

Bonus: Here is the Disk Utility for the external drive in the measure
Disk Utility, which shows the Seagate expansion unit in gray, not mounted

ssd: why does my hard drive start working so hard for so long that it leaves the system unusable?

So I have two systems running Linux now. From time to time, I've been playing with him for a couple of weeks, different distributions, etc., etc. And I will not go back to Windows unless it is necessary, I will do a vm for that in the light of the clients, since Linux seems to have matured a lot and actually easily surpasses the windows when it comes to usability, not just the power as He has always done it (my laptop fan has never been so quiet and even this old i3 can easily run 1080p60 on YouTube now).

However, for now there is a problem that prevents me from wanting to take the final final step. I have a big problem in both systems (a Kali (mechanical hard disk, 4 GB of RAM, i5) and an Ubuntu 19.04 (6 GB, SSD, i3)) and is that he will be sitting happy to do things quickly. However, suddenly, the hard drive will start doing something for so long and with such intensity that it will make the system totally unusable. The mouse will not move (or very slowly, it does not leave its current position, almost), therefore, I cannot start a monitoring tool, nor would it work since it will not even update the screen anymore). The systems try this trick a few times a day and I have to shut it down hard and restart it so it can be used again. I just lowered the exchange to 30 to see if that could be the problem, but in my opinion that seems unlikely since I changed this SSD, even if it was the full 6GB it shouldn't take 10 minutes, 20 minutes or more … at maximum a couple of seconds.
The same goes for the installation of Kali. In fact, I switched to ubuntu on my laptop, so see if it was some distribution. It does not seem to be.

What else could be happening? How do I solve this? Could it be an update, to the window, in the background? Any cron work? A driver thing?

Any advice would be greatly appreciated.

Security: How to detect that the internal hard drive is removed and what files were copied?

Encrypt the entire hard drive, then the copied data is useless.

But if someone malicious has unrestricted access to their hardware, they have lost the security game anyway. They can install all kinds of spyware or even hardware errors. Then encryption will not help you either. See Evil Maid Attack.

Securing your hardware is the first and most basic security layer. If you can't do that, everything else makes no sense.

yosemite – How do I get rid of a black and white hard drive icon that reappears on my macOS desktop?

I have an iMac with OS X Yosemite 10.10.5 and an external hard drive with 3 partitions.

The external HD was disconnected and left disconnected. Since then, it appears on my desk at every start, in black and white. It can be ejected at any time (with I sendme or Disk Utility) but keeps coming back every time it starts.

If I connect the HD, it also appears in color in addition to the false black and white HD icons. It can be ejected and does not come back unless you plug it in again. Clicking on the fake icon displays the correct menu, and all documents and applications can also be accessed.

How do I get rid of black and white icons?

javascript: use callback with custom Stair Exchange Flair, is it hard to follow?

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var userCard = {
	username: "http://codereview.stackexchange.com/",
	profileImageUrl: "http://codereview.stackexchange.com/",
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	badges: {
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		silver: 0,
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	siteUrls: ()
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var accountID = '13342919';
generateCard('user-flair-wheel', accountID, CardType.Wheel);

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function generateCard(containerid, accountid, cardType) {
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		var container = document.getElementById(containerid);
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		container.classList.add(className);
		
		// Build the card.
		addProfile(container);
		addScores(container, className);
		addSites(container, className);
		container.innerHTML += '
'; }); } function addProfile(container) { container.innerHTML += ''; container.innerHTML += '

' + userCard.username + '

'; } function addScores(container, cardType) { var badges = '
    '; badges += '
  • ' + userCard.reputation + '
  • '; badges += '
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  • '; badges += '
'; container.innerHTML += badges; } function addSites(container, cardType) { var sites = ''; container.innerHTML += sites; } /* Stack Exchange API Based Functions */ function getAssociatedAccounts(accountID, callback) { let url = 'users/' + accountID + '/associated'; getSEWebServiceResponse(url, function(response) { if (!response.items) return; var accounts = sortAccountsByReputation(response.items); var accountsProcessed = 0; for (let i = 0; i < accounts.length; i++) { let siteName = accounts(i).site_url.replace('https://', "http://codereview.stackexchange.com/"); siteName = siteName.replace('.stackexchange', "http://codereview.stackexchange.com/"); siteName = siteName.replace('.com', "http://codereview.stackexchange.com/"); getAssociatedAccountDetails(accounts(i).user_id, siteName, accounts(i).site_name, function() { if (++accountsProcessed >= accounts.length) callback(); }); } }); } function getAssociatedAccountDetails(userID, siteName, fullSiteName, callback) { let url = 'users/' + userID +'?order=desc&sort=reputation&site=' + siteName; getSEWebServiceResponse(url, function(response) { if (!response.items) return; let account = response.items(0); userCard.reputation += account.reputation; userCard.badges.gold += account.badge_counts.gold; userCard.badges.silver += account.badge_counts.silver; userCard.badges.bronze += account.badge_counts.bronze; if (userCard.siteUrls.length < 7) { var siteProfileCombo = account.link + "http://codereview.stackexchange.com/""http://codereview.stackexchange.com/" + fullSiteName; siteProfileCombo = siteProfileCombo.replace('', getSiteIcon(siteName)); userCard.siteUrls.push(siteProfileCombo); } if (userCard.username.length < 1) userCard.username = account.display_name; if (userCard.profileImageUrl.length < 1) userCard.profileImageUrl = account.profile_image; callback(); }); } /* Helper Functions */ function getSEWebServiceResponse(request, callback) { let apiRoot = 'https://api.stackexchange.com/2.2/'; let key = 'key=s29XM)Eqn2x3YxhjLgFwBQ(('; if (request.indexOf('?') >= 0) key = '&' + key; else key = '?' + key; getWebServiceResponse(apiRoot + request + key, function(response) { callback(response); }); } function getWebServiceResponse(requestUrl, callback) { let request = new XMLHttpRequest(); request.open('GET', requestUrl, true); request.onload = function() { if (request.status < 200 "http://codereview.stackexchange.com/" request.status >= 400) callback("An unexpected error occurred."); else callback(JSON.parse(this.response)); }; request.send(); } function sortAccountsByReputation(accounts) { return accounts.sort(function(a, b) { return b.reputation - a.reputation; }); } function getSiteIcon(siteName) { if (siteName == "meta") return 'https://meta.stackexchange.com/content/Sites/stackexchangemeta/img/icon-48.png'; return 'https://cdn.sstatic.net/Sites/' + siteName + '/img/apple-touch-icon.png'; }
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	text-shadow: none;
	border-radius: 25px;
	padding: 5px 10px;
	box-shadow: 2px 2px 3px #0005;
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.flair > .se-tooltip.active {
	bottom: 10px;
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Digital Ocean: flexible hard drive

Digital Ocean: flexible hard drive | Web Hosting Talk

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  1. Digital Ocean: flexible hard drive

    I have a VPS with Digital Ocean. He has several plans, but I don't like that he can't increase the hard drive alone. Imagine that you only want 10 GB of hard disk and 4 GB of memory. Then you are paying a lot of money for the hard drive you will not use (80 GB). I would like to ask if Digital Ocean will have this feature in the future. That's why I'm thinking about changing VPS. Look, clouding.io is a Spanish hosting that has a flexible hard drive.


  2. All you need is an HDD, then use block storage or object storage for the rest. Vultr is quite similar in this regard.


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hard drive: 5.25 to NGSFF and standardized PCI-E connectors for HEDT platforms

Later this year I will do a major reconstruction (not a new computer, although most of the parts will be replaced). A large part of that is that I am remaking the entire storage infrastructure. I currently have three SSDs (C: and RAID 1 D: for My Documents) and two RAID 1 more (each mechanical unit of 4 TB). With my 3.5 / 2.5 adapter (5.25 bay) and my optical drive, I am using the 10 SATA ports.

I will upgrade to 3 NVMe units and ideally two 12 TB HGST mechanical units (with an additional 12 TB and an additional NVMe for cold storage redundancy). However, I recently found the NGSFF format:

NGSFF versus M.2 NVMe SSD

It makes more sense to double the space. It will take a few more years for 8 TB + SSDs (of any form factor) to reach the $ 200 mark ( will be pass of course).

Therefore, I'm curious to know if there is a way to replace those 12 TB mechanical units with a set of NGSFF SSDs in a few years. Ideally, it would have a lock and a key and could simply have an LED light or something, if a drive fails, I know which one to highlight and rebuild the RAID array. With my current adapter from 5.25 to 2.5 + 3.5 I can treat hard drives as floppy disks. So…

  • Are there 5.25 bay adapters for NGSFF?
  • What would the PCI-Express cables be like for each unit? Would you need an expansion card to create cables to each unit in the front of the box?
  • I can wait a moment to accept an answer; This is more theoretical at this time, although at some point (maybe soon, maybe later) I am sure that this will be more viable in the HEDT consumption space.

NGSFF server storage

hard drive: how to transfer files from mac desktop to external hard drive

I have files on the Mac desktop that I want to transfer to a new external hard drive. I do not understand why it is not a simple matter. I am trying to drag the files that I want to transfer from the desktop to the new folder on the external hard drive, but I cannot transfer the files.

Why is this not a simple matter?

jpeg: look for a blur image comparison tool (not online, but for hard drive search)

While this may not answer the question completely (I don't know of such a program), what you are trying to do is very much related to video compression.

Video compression works by dividing the video into small blocks. Then, each block has an associated motion vector. A non-keyframe is calculated from a keyframe, with motion vectors applied and with difference blocks specified for differences that cannot be explained solely by motion vectors.

I think I could define a measure for the difference by comparing the discrete cosine transformation coefficients of the difference blocks, and the length and uniformity of the motion vectors.

For example:

  • If the camera moved a little, most motion vectors have the same length and direction
  • if any subject has moved in the image, then only for that subject there are large motion vectors; most motion vectors are zero

What this does not take into account is the exposure. You can try to normalize the exposure and then take that into account in the comparisons.

I am sorry to say that what you are trying to find may not be available (and software recommendations are often also out of the question here), and building such a system by coding it from scratch is very, very difficult.

NP Hard Advanced Algorithms – Computer Stack Exchange

Given an integer m-by-n matrix A, and an integer m-vector b, the integer programming problem asks if there is an integer n-vector x such that Ax≤b. Show that this problem is NP-complete.

Integer Programming Problem

  • Input: m * n matrix A, m-vector b
  • Output: Is there an n-vector x? Such that AX≤B

Test SAT Problem Integer Programming Problem (IPP)
SAT ∈ NPC known
Input: CNF Bulin Function E (x) = C1∧C2∧… ∧Ck, x = x1,…, xn
Such as C1 = ¬x1 + x3 + x7
Output: Is there a set of entries like x? Make E (x) = True

Change:

  1. IPP input A = ⎡⎣⎢a11 … am 1a12 … am2 …………… a1 n … am n⎤⎦⎥, b = ⎡⎣⎢b1 … bm⎤⎦⎥, where each column ai ∗ b Corresponds to Ci

  2. Such as: C1 Correspondence (1 – x1) + x3 + x7≥1 → −x1 + x3 + x7≥0 → x1 – x3 – x7≤0 → a1 = 1.0, −1,0,0,0, – 1, …, b1 = 0

  3. The IPP output is changed to: Is there an n-vector x = 0.1 Make Ax≤b, 0 corresponds to False, 1 corresponds to True
    3 .. because SAT (E) = IPP (A, b)

  4. Then SAT ∝ IPP → IPP ∈ NP-hard
  5. And IPP ∈ NP (just write an NP algorithm to know)
    IPP ∈ NPC

My friend said the problem is that the integer programming problem is not a 0-1 integer programming problem

I do not understand.

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