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Macs aren’t immune from hard disk corruption and failures. They’re just as common on Macs as they are PCs. Although most Macs have solid-state drives, even these systems can have problems. Apple’s built-in utilities and some third-party programs will get you up and running.
If the hard drive works on another computer, then it isn’t your hard drive. Photo by Wesley Fryer Check to see if the repair is free: Check your serial number with Apple. Having icons for Macintosh HD, hard drives, external drives, disc media, and other volumes show up on the desktop had been a long standing feature that was in classic Mac OS, and some of those external volumes persist today in modern Mac OS releases too. Thanks to settings, you can customize these icons on your desktop exactly as you’d wish. Next to iCloud Drive, click Options. Choose Desktop & Documents Folders. In the Finder, you'll see your Desktop and Documents folder in the iCloud section of your sidebar. If you add a second Mac Desktop, you'll find those files in the Desktop folder in iCloud Drive. A folder is created with the same name as your second Mac. Next, make sure the drive you want to give a custom icon is connected to your computer. Then, open the Finder and click your computer under “Devices.” You’ll see all of your connected drives. Right-click the drive you’d like to give a custom icon, then click “Get Info.” This will bring up the information screen for your hard drive.
Symptoms of a Hard Disk Problem
The worst noise you’ll hear from a mechanical hard disk is a clicking or grinding noise. That means the drive is failing. At that point, the drive isn’t repairable. It’s time to back up your data and then replace the drive. You already have a backup though, right?
Not all drives exhibit symptoms in this way. Sometimes you’ll get the prohibitory no symbol at startup or a flashing folder with a question mark. After turning off your Mac and turning it back on, the system boots just fine. Other times you’ll get the spinning rainbow wheel, letting you know your Mac is waiting on something. That could be because your Mac is waiting on the hard drive.no symbol at startup or a flashing folder with a question mark. After turning off your Mac and turning it back on, the system boots just fine. Other times you’ll get the spinning rainbow wheel, letting you know your Mac is waiting on something. That could be because your Mac is waiting on the hard drive.
Diagnosing the Problem
If you suspect your hard disk is failing, it is time to make a backup. Now. Again, you should already have a backup of your Mac. Don’t proceed before you try to make a backup. Apple’s Disk Utilityis the first place to start. Reboot your Mac and hold down the command and r key down at the same time to enter Recovery Mode.
Don’t have recovery mode? You’ll need an offline Mac installer to run Disk Utility off a USB drive.![Show external drive on desktop Show external drive on desktop](https://cherrysystems.com/wp-content/uploads/2016/02/Desktop-Hard-Drive.png)
When you reboot, you’ll see the OS X Utilities window. At the bottom of the list is Disk Utility. Select Disk First Aid to test the hard drive for problems. The utility will fix any problems or warn you of a S.M.A.R.T hard drive error. If Disk Utility finds any problems, try rebooting and see if everything is working.
Some Macs have a built-in hardware diagnostic. Reboot your Mac holding down the D key. That runs a full hardware test on your Mac. The diagnostic will report any problems, including the hard drive.
Does your Mac Support Apple Diagnostics? Apple explains which models support this here.Your Might Have a Confused Hard Drive
The Mac’s journaled file system usually keeps things in order. Glitches and improper shutdowns might leave things scrambled. If Disk Utility reports a problem it can’t fix, it is time to try a third party utility. My favorite is Disk Warrior. It often fixes problems Apple’s utility can’t. It can also do more diagnostics on your drive. ![Show hard drive on desktop Show hard drive on desktop](https://www.sonnics.co.uk/prod_cat/images/31QFhqEy69L._SX425___________wi640he480moletterboxbgwhite.jpg)
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You’ll need to boot your Mac off a Disk Warrior flash drive to do testing and repair. The program creates a Recovery flash drive. During its diagnostic process it will repair and optimize the drive. If it detects a hard drive error, the program warns you.
Sometimes it isn’t the Hard Disk
If you’ve tried all this and are still having problems, there could be something wrong with your Mac other than the hard drive. If you have a MacBook Pro, the ribbon cable that connects the hard drive to the rest of the computer can go bad. The Mac exhibits all the same symptoms as a failed hard drive. The best way to figure this out is to remove your hard drive and try it in another Mac. If the hard drive works on another computer, then it isn’t your hard drive.
Check to see if the repair is free: Check your serial number with Apple. Your Mac may still be under warranty.The other typical problem is operating system errors. A system update or upgrade was interrupted leaving your Mac in a confused state. You can reinstall your operating system from the recovery mode. That won’t erase any data on your Mac.
Rarely the problem is in the Mac’s System Management Controller (SMC) . Before you give up hope, try Apple’s procedure for resetting the SMC.
What if You Have a Solid State Drive?
Solid State Drives (SSDs) don’t make the typical noises of a mechanical hard drive. After all,they have no moving parts. The testing procedures are the same. You won’t be able to easily remove the hard drive to test it in another machine. Programs like Disk Warrior are smart enough to change the optimization procedure for an SSD drive.
![Show hard drive on desktop Show hard drive on desktop](https://www.sonnics.co.uk/prod_cat/images/31QFhqEy69L._SX425___________wi640he480moletterboxbgwhite.jpg)
Replacing the Hard Drive
Some Macs have easy hard drives to replace. Some Mac models hard drives aren’t replaceable by end users. Most Mac-savvy retailers know the difference and can guide you towards the right repair. Replacing your hard drive with an SSD will give you the best performance, but may limit your storage space. We cover the differences here.
ALSO READ:DaisyDisk: The Best, Most Intuitive App to Find Large Files on Your Mac’s Hard Drive
The above article may contain affiliate links which help support Guiding Tech. However, it does not affect our editorial integrity. The content remains unbiased and authentic.Also See#data recovery #hard disk
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Fusion Drive is Apple Inc's implementation of a hybrid drive. Apple's implementation combines a hard disk drive with a NAND flash storage (solid-state drive of 24 GB or more)[1] and presents it as a single Core Storage managed logical volume with the space of both drives combined.[2]
The operating system automatically manages the contents of the drive so the most frequently accessed files are stored on the faster flash storage, while infrequently used items move to or stay on the hard drive.[3] For example, if spreadsheet software is used often, the software will be moved to the flash storage for faster user access. In software, this logical volume speeds up performance of the computer by performing both caching for faster writes and auto tiering for faster reads.
Availability[edit]
The Fusion Drive was announced as part of an Apple event held on October 23, 2012, with the first supporting products being two desktops: the iMac and Mac Mini with OS X Mountain Lion released in late 2012.[3] Fusion Drive remains available in subsequent models of these computers, but was not expanded to other Apple devices: the latest MacBook and Mac Pro models use exclusively flash storage, and while this was an optional upgrade for the mid-2012 non-Retina MacBook Pro discontinued by Apple, it will replace the standard hard disk drive instead of complementing it in the fashion of Fusion Drive. Supported products have the following configurations: Castle clash best hero for war god.
Release date | HDD storage | Flash storage | |
---|---|---|---|
Mac Mini | Late 2012 | 1 TB | 128 GB |
Late 2014 | |||
iMac (all models) | Late 2012 | ||
Late 2013 | |||
2014 | |||
iMac (27-inch non-Retina) | Late 2012 | 3 TB | |
Late 2013 | |||
iMac (27-inch Retina) | Late 2014 | ||
Mid-2015 | |||
iMac | Late 2015 | 1 TB | 24 GB |
2 TB | 128 GB | ||
Mid 2017 | 1 TB | 32 GB | |
2 TB | 128 GB | ||
3 TB | |||
Early 2019 | 1 TB | 32 GB | |
2 TB | 128 GB | ||
3 TB | |||
iMac (21.5-inch) | Late 2020 | 1 TB | 32 GB |
Best Buy Desktop Hard Drive
Design[edit]
Apple's Fusion Drive design incorporates proprietary features with limited documentation. It has been reported that the design of Fusion Drive has been influenced by a research project called Hystor.[4] According to the paper,[5] this hybrid storage system unifies a high-speed SSD and a large-capacity hard drive with several design considerations of which one has been used in the Fusion Drive.
- The SSD and the hard drive are logically merged into a single block device managed by the operating system, which is independent of file systems and requires no changes to applications.
- A portion of SSD space is used as a write-back buffer to absorb incoming write traffic, which hides perceivable latencies and boosts write performance.
- More frequently accessed data is stored on the SSD and the larger, less frequently accessed data stored on the HDD.
- Data movement is based on access patterns: if data has been on the HDD and suddenly becomes frequently accessed, it will usually get moved to the SSD by the program controlling the Fusion Drive. During idle periods, data is adaptively migrated to the most suitable device to provide sustained data processing performance for users.
Several experimental studies[3][6][7][8][9][10] have been conducted to speculate about the internal mechanism of Fusion Drive. A number of speculations are available but not completely confirmed.
- Fusion Drive is a block-level solution based on Apple's Core Storage, a logical volume manager managing multiple physical devices.[6][7] The capacity of a Fusion Drive is confirmed to be the sum of two devices.[6][7] Fusion Drive is file system agnostic and effective for both HFS Plus and ZFS.[8]
- Part of the SSD space is used as a write buffer for incoming writes.[6][7] In the stable state, a minimum 4 GB space is reserved for buffering writes.[3][6][7] A small spare area is set aside on the SSD for performance consistency.[7]
- Data is promoted to the SSD based on its access frequency.[6][7] The frequency is detected at the block level [9] and below file system memory cache.[10] Data migration happens in 128 KB chunks during idle or light I/O periods.[6][7]
- Operating system and other critical documents are always cached on the SSD.[6] Applications are likely to be handled similarly.[7] A regular file can reside on both devices.[9]
See also[edit]
- bcache, dm-cache, and Flashcache on Linux
- Smart Response Technology — a similar technology from Intel (for desktops)
- ExpressCache — used on a number of Wintel laptops
- ZFS - A file system using similar technology
References[edit]
- ^Dominguez, Alberto (3 January 2019). 'The best desktop computers of 2018'. Pandora FMS. Archived from the original(html) on 3 January 2019. Retrieved 3 January 2019.
- ^Hutchinson, Lee (October 23, 2012). 'Apple Fusion Drive—wait, what? How does this work?'. Ars Technica. Condé Nast. Retrieved October 25, 2012.
- ^ abcdShimpi, Anand Lal (October 24, 2012). 'Understanding Apple's Fusion Drive'. AnandTech. Retrieved October 25, 2012.
- ^'Computer Science Research at Ohio State Makes Impact in Apple's Hybrid Storage Product'. www.cse.ohio-state.edu. 2013-04-08.
- ^'Hystor | Proceedings of the international conference on Supercomputing'. doi:10.1145/1995896.1995902. S2CID207188516.Cite journal requires
|journal=
(help) - ^ abcdefgh'Achieving fusion—with a service training doc, Ars tears open Apple's Fusion Drive'. www.arstechnica.com. 2012-11-05.
- ^ abcdefghi'A Month with Apple's Fusion Drive'. www.anandtech.com. 2013-01-18.
- ^ ab'Fusion Drive - loose ends'. jolly.jinx.de/. 2012-10-31.[unreliable source?]
- ^ abc'More on BYO Fusion drive'. jolly.jinx.de/. 2012-10-31.[unreliable source?]
- ^ ab'Fusion Drive last words'. jolly.jinx.de/. 2012-11-04.[unreliable source?]
Put Hard Drive On Desktop
External links[edit]
Apple Show Hard Drive On Desktop Laptop
- Fusion Drive – Apple's description
- Fusion Drive – Apple Knowledge Base article
Apple Show Hard Drive On Desktop Computers
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Fusion_Drive&oldid=978075993'