A hard disk drive (or HDD) is a non-volatile, random access device for storing digital data.

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Why Do Some USB Cables Have Two USB Connectors at the End?

I've recently bought an external hard drive enclosure and it had arrived with an USB cable, with one USB connector on one side and two on the other. Why do some USB cables have two connectors while ...
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Making sense of S.M.A.R.T

First of all, I think everyone knows that hard drives fail a lot more than the manufacturers would like to admit. Google did a study that indicates that certain raw data attributes that the S.M.A.R.T ...
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Can I trust a hard drive that has had to reallocate sectors?

I ran this HD utility called CrystalDiskInfo that displays some of the S.M.A.R.T. information on my drives. It is displaying a "Caution" warning on one of my drives because its "Reallocated Sectors ...
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Why is windows not able to create a system partition?

I'm reinstalling Windows 7 64 bit, and I encountered an issue I've never seen before. I have a legit copy of Win 64 Professional, and I've installed it probably a half dozen times on this machine in ...
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2answers
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combining SSD and hard disk in software RAID1?

Does it make sense to build a Linux software RAID-1 (mirroring) using an SSD and a normal hard disk? I want to combine the advantages of SSD (fast transfer rates, fast access times) with the ...
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How can I force an internal hard drive to power on or off when I want?

Obviously there are power management settings which Windows uses to determine when to power a hard drive off, and when to power it back on again. Powered down I assume doesn't mean absolute zero power,...
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Are 3.5 inch SSD drives available? Why so many 2.5inch versions?

I want an SSD SATAIII because to me it represents the best combination of quietest & fastest. But there doesn't seem to be much choice relative to 2.5" variants or non-SSD 3.5". I feel like there'...
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Need clarification on what IDE hard drive size—2.5 inch versus 3.5 inch—actually means

I have some older IDE (parallel ATA) hard drives I want to check for files before tossing them out. I have found SATA/IDE to USB Adapters to use, but they specify 2.5" and 3.5" hard drive connections. ...
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Is it faster to have two smaller hard drives or one big one?

Assuming that the drives all have the same RPM and overall same specs except for storage space, would it be faster to install two hard drives together or just one larger one in a computer?
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What are the differences between primary and logical partition?

What are the major differences? Which is more preferable? Are there any OS specific advantages for one over the other?
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How much power does a hard drive use?

This is not as straight forward as it sounds. Specs from Western Digital's site for a WD 3TB Green Drive: Read/Write 6.00 Watts Idle 5.50 Watts Looks fine right? Look at this part of the spec: "...
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How to force a remap of sectors reported in S.M.A.R.T C5 (Current Pending Sector Count)?

The S.M.A.R.T C5 value of my Samsung HM640JJ Hard Drive (in an HP Pavilion dv6 laptop) is "yellow status = caution" C5 was 10 yesterday, and it's 21 today. C4 (Reallocation Event Count) = 0 and 05 (...
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How to partition a hard drive that has no OS installed?

I have a 500 GB hard drive. The laptop came with Windows 7 preinstalled. Now as I am installing Windows 8, I have deleted the C drive. So I have 460 GB free unused space where I can install Windows 8....
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Does a hard drive remember bad sectors after formatting?

On an NTFS-formatted hard drive with some bad sectors, does the hard drive still remember bad sectors after Windows's diskpart clean is used to remove the NTFS volume? What about clean all?
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Running Spinrite from a USB drive?

I need to use SpinRite on my notebook which has no CD-ROM. How can I install and run SpinRite from a USB thumbdrive? Such that I could boot the notebook up with a thumbdrive and start SpinRite. Are ...
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Why does a SATA hard drive have jumpers?

Back in the days of PATA hard drives, a person used jumpers on the drive to indicate whether the drive was the master or the slave of the channel, or to let the cable select which drive was which. ...
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Is a 7200rpm USB 3.0 drive going to have very similar performance to an internal 7200rpm drive or is it still going to be noticeably slower?

I use my old 500gb drive to store all temporary stuff (windows temp folder, adobe scratch disks etc), and anything that needs thousands of small files to avoid unnecessarily fragmenting my C drive. ...
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Does storage capacity affect hard drive performance?

I read somewhere that smaller (in terms of disk space) hard drives are faster than equivalent but bigger hard drives. How true is this? In other words, say I have two hard drives. Both are of the ...
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Why are so few SSD 3.5 inches? [closed]

I was looking around for a cheaper SSD on Newegg and the time I'm writing this they have almost 300 2.5-inch SSD but only 12 3.5-inch ones, 9 of which are sold out. Why are there so few 3.5-inch SSD? ...
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What are the differences between MBR vs GPT vs any other partition scheme?

Can anyone tell me what the main differences between i.e. MBR vs GPT or any other partition scheme are? Why would one choose one over the other? I am not an expert but from new release of Mac OS X ...
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How can I enable AHCI on a SATA drive after installing Windows?

Can I enable AHCI after installing Windows 7 in a SATA drive that was on IDE mode?
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How do I delete a VM in VirtualBox when the hard drive the VDI file was on is deleted?

I'm using VirtualBox hosted on Windows 7 and the physical hard drive that one of my VM's VDI file was on got completely borked and no longer exists. The problem is that now I can delete neither ...
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How to connect multiple HDDs to a computer?

What is the best and most efficient way to connect 10 - 20 SATA HDDs to a home computer? I mean an ordinary motherboard supporting 2 connections for SATA HDDs. The purpose of this assembly is to ...
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How do I unmap a disconnected network drive in Windows 7?

The drive is disconnected, and I'm off the network. How do I unmap the drive? This seems like it should be a simple procedure, but I'm missing something. My Google-fu is weak today...
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Chkdsk Questions

Recently in running chkdsk /r on my system drive (platter drive, Windows 7 Ultimate 64bit) I've gotten back "4 EA records processed" and "76 reparse records processed". Am I right in assuming these ...
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Tool to copy files of HDD with bad sectors

I have an external hard drive that is starting to fail; it has some bad sectors. It's a 1 TB Fujitsu Siemens case with a Western Digital hard drive inside. Eventually I will backup the whole ...
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Resizing partition in Windows 7: how long does it take?

Okay, maybe this is me worrying about nothing, but... I have a 500 Gb. external drive where I want to create a second partition. I plug it into my Windows 7 box, use Disk Manager and pick the "Shrink ...
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Firefox writes megabytes of data per minute to disk, why?

iotop -a (accumulated I/O) on Linux shows after about 10 min. of browsing Internet: Total DISK READ: 0.00 B/s | Total DISK WRITE: 0.00 B/s TID PRIO USER DISK READ ...
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How to measure disk performance? [duplicate]

A friend has asked me to perform maintenance oh his computer. The described symptoms point to a performance issue with the hard drive. I want to objectively confirm this suspicion by measuring the ...
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How to move from one drive to another that's a different size?

I've run into this scenario a few time: I need to replace a drive because I need more space, it's having problems, moving to a new box, etc. What's the best way to copy data from one partition size ...
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Can I set up a RAID 5 with a bunch of drives of different sizes?

I currently have 3 1TB drives, a couple 500GB ones and some 750GB ones. Can I put them all in a RAID 5 configuration or do they need to be of same size?
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How to fill a hard drive in Linux

I'm doing some testing of a piece of code and I want to fill a hard drive with data. I found that dd can make huge files in an instant, but df disagrees. Here's what I tried: dd if=/dev/zero of=...
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What is the easiest method of checking SMART status for your hard drive?

I've seen programs in the past that were able to check the SMART status of a hard disk drive but it wasn't easy for me to find. Also, I think I had to boot into the CD in order to check on it. What is ...
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What do you call the area on a hard disk smaller than a sector?

So I know about tracks and sectors, but what do you call the "area" on a hard disk that makes up the sector? I'm talking about the spot that stores 1 bit of data, the tiny little area that stores ...
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Is my hard drive failing?

I'm beginning to worry about my ~3yr old WD Green drive. In the last few days i've noticed that my media player is acting weird, it won't move to the next track after a song has finished and also won'...
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6Gb/s SATA hard drive with 3Gb/s SATA port?

I know I can use a 3Gb/s SATA hard drive with a 6Gb/s SATA port, but can I use a 6Gb/s SATA hard drive with a 3Gb/s SATA port? I am unable to find a definite answer.
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Using External Harddisk as an internal desktop SATA Harddisk

I have a 2TB Western Digital MyBook Essential External Hard-disk. I wanted to use the Hard-disk as an internal hard-drive for my PC running Linux Mint. So, I dis-assembled it, and took out the SATA ...
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Fix bad blocks on Mac hard disk

I have a hard disk that I scanned with TechTool and it reports one bad block. As far as I can tell, TechTool only scans and reports a failure. It doesn't fix anything. Back in the day, Norton Disk ...
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Cross platform Hard Disk encryption?

I would like to encrypt my hard drive so that it requires a password to access it. However features like BitLocker in Windows will only work under Windows, and cannot be accessed from another OS such ...
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Dispose or Recycle Hard Drive

I have 3 old 3.5" internal hard drives sitting gathering dust at the moment. 2 are SATA, and one IDE. I want to either start putting them to use, or dispose of them to clear up some space. What is ...
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How can I use an old PATA hard disk drive on my newer SATA-only computer?

I've got some old hard drives I'd like to connect to my new computer to quickly transfer gigs and gigs of data from the old drives to my nice large new drives. The old drives are PATA/IDE/ATA and the ...
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Can hard drives fully utilize SATA III?

My motherboard currently supports both SATA II and III (3 Gb/s and 6Gb/s respectively), but after reading some online, it seems as though connecting a HDD to the 6 Gb/s is pretty much pointless. If ...
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Power consumption: SSD vs HDD

In questions like this one and in websites everywhere it's noted that SSDs use much less power than HDDs... usually citing ~2 W vs ~6 W for HDDs, my question (and sorry if its stupid just need to be ...
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which file type to install my virtual hard disk in while installing a new machine on virtualbox?

I got some options like VHD, VMDK, HDD, and VDI is there a file type that is most commonly used and is supported by most other virtual disk software?
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Why do HDDs suffer from performance loss due to capacity decrease?

Today I was looking over my HDD datasheet(a Western Digital 500GB WD5000BPKT) and I noticed that for its entire family, the "Performance" row "Host to/from drive (sustained)" is nominally decreasing ...
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HDD vs SSD durability [closed]

I heard that SSD are less durable than HDD. Is it true ?
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Why is the effective hard drive size lower than the actual size?

I just got a new Lenovo Laptop which has been installed with Windows 7 and is supposed to have 250 GB hard disk. Windows 7 reports that the hard disk drive has two parts: 221 GB C: and 9.76 GB ...
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Can a single volume be assigned multiple drive letters?

I am working on migrating data across many disparate drives onto one massive Windows 8 Storage Space. Problem I have is that many of my programs reference various drive letters to acces their ...
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Should I install my operating system on my SSD or HDD?

I'm currently deciding whether to install my Operating System on my SSD (solid state drive) or HD (hard drive). Will I be having programs on the HDD and the OS on the SSD or vice verca? Which will ...
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How can I resolve the error “MediaKit reports partition (map) too small”?

I am unable to expand my Mac's hard disk. diskutility reports this error: MediaKit reports partition (map) too small How can I resolve this?