Most hard drives give some warning before they fail. You just have to know what the warning looks like. It might be a click you have never heard before, a folder that opens slowly, or a drive that vanishes from File Explorer for a few seconds and then comes back.
This guide walks you through the signs by how you notice them: sounds, performance, files, boot problems, and warnings from Windows and S.M.A.R.T. It covers traditional spinning (mechanical) hard drives. If your drive is noisy or has gone missing, perform the immediate steps.
1. Sounds a Failing Hard Drive Makes
A healthy mechanical hard drive hums and whirs softly as one or more platters spin on a spindle motor. Above their surfaces, read/write heads glide on a thin cushion of air, positioned with incredible precision by an actuator to read and write data without touching the platters. A circuit board (PCB) and firmware control the whole process. When a moving part wears out, you usually hear it before anything else.
1.1. Clicking or ticking
A repeated hard drive clicking or ticking is the classic click of death. The heads cannot find the data track, return to their parked position, and try again, over and over. It points to failing heads or damaged platter surfaces. Every extra minute of power risks more damage, so stop using the drive immediately.
1.2. Grinding or scraping
Grinding or scraping can mean a head crash, where the heads touch the platters, or worn spindle bearings. A head crash can scratch away data permanently. So, power the drive off straight away, and do not keep running it to see whether the noise goes away.
1.3. Beeping, buzzing, or no spin-up
Buzzing or beeping, or a drive that stays silent when it should spin up, often points to a stuck spindle motor or an electronic fault on the PCB. First confirm the sound comes from the drive and not the motherboard. For an external drive, a different USB port or cable is worth a quick try. If it still will not spin, leave it off.
2. Performance Signs
Slow behaviour is the most common sign and the easiest to dismiss. The difference with a failing drive is that the problem points at storage: it appears when files are read or written, not just when many programs are open.
2.1. Slowdowns when opening or saving files
When the drive hits weak or bad sectors, it retries the read many times before it gives up. Windows waits for each retry, so a simple file open can stall for seconds. A useful clue: if only certain files or folders are slow while the rest of the system feels normal, damaged sectors are a likely cause. Whole-system lag has more possible hardware or software causes.
2.2. Freezing and 100% disk usage
Open Task Manager, go to Performance, and select the disk. If active time sits at or near 100% while transfer speeds are tiny and you have little open, the drive is struggling. Windows Search indexing, updates and antivirus scans can cause the same pattern, so check whether it continues after a restart with nothing else running. If it does, treat it as a warning, not a quirk.
2.3. Random crashes and blue screens
Critical system files live on the drive. If they sit on damaged sectors, Windows cannot load them and the computer crashes or shows a Blue Screen of Death (BSOD). These stop codes are worth writing down:
| Stop code | What it suggests |
| INACCESSIBLE_BOOT_DEVICE | Windows cannot reach the boot drive during start-up |
| UNMOUNTABLE_BOOT_VOLUME | Windows cannot read the file system on the boot drive |
| KERNEL_DATA_INPAGE_ERROR | Windows could not read data back from the drive into memory |
These codes can also come from drivers, memory or cabling, so one blue screen does not prove the drive is dying. Repeated storage-related codes are a different story.
3. File and Data Signs
3.1. Corrupted or unreadable files
File corruption shows up as documents that will not open, photos that load half-way, or messages saying a file is corrupt. When it happens to files you have not touched in months, bad sectors are a likely cause, because the surface holding that data has degraded.
3.2. Missing files or folders
Folders that appear empty, or files that vanish, can mean the file system’s index is damaged even if the data is still on the platters. Stop saving new files to the drive. Anything you write could overwrite what you are trying to keep.
3.3. Errors when saving or copying
A copy that stalls at the same percentage every time is a strong hint. So are Windows errors such as 0x80070570 (the file or directory is corrupted and unreadable) and 0x8007045D (the request could not be performed because of an I/O device error). Both point to the drive failing to read or write at a specific location.
4. Detection and Boot Signs
4.1. Drive not showing in File Explorer or the BIOS
Where the drive is missing tells you something. If it appears in Disk Management but has no drive letter, it may be a software issue. If it is missing from Disk Management and the BIOS/UEFI, check the SATA cable and power connector first. If connections are fine, the cause may be an electronic or mechanical fault. A drive that disappears and returns intermittently is especially serious, because the next disappearance may be permanent.
4.2. “No bootable device” or “Operating system not found”
These messages mean the computer cannot find a working boot sector or system files on the boot drive. A wrong boot order or damaged startup files can cause them, but if the BIOS does not list the drive at all, suspect the drive itself. If you’re experiencing a laptop or computer not turning on, check for power-related problems before troubleshooting boot errors.
4.3. CHKDSK running on every start-up
Windows runs CHKDSK at boot when it marks a volume as having errors. Once is normal after a power cut. Every start-up is not. It means file system errors keep coming back. If this keeps happening, back up your important files before letting more scans run, because scanning puts extra load on a weak drive.
5. Warnings from Windows and S.M.A.R.T.
5.1. S.M.A.R.T. status warnings
S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) is the drive’s built-in health monitor. Windows can show its summary in PowerShell with Get-PhysicalDisk, where HealthStatus reads Healthy, Warning or Unhealthy. Free tools such as CrystalDiskInfo and HDDScan show Good, Caution or Bad labels plus the raw attributes. Windows Security’s Device performance & health page is not a drive test, so do not rely on it. Any Caution, Warning or Bad result means back up now.
5.2. Bad sectors increasing
Three S.M.A.R.T. attributes matter most: Reallocated Sector Count, Current Pending Sector Count and Offline Uncorrectable. A few reallocated sectors over years is common. Numbers that climb from one check to the next are the warning. Event Viewer can add evidence: under Windows Logs > System, look for Disk events such as ID 7 (bad block), ID 11 (controller error) and ID 153 (an I/O operation was retried).
Note: S.M.A.R.T. is not a guarantee. Backblaze’s published drive research found that some drives fail with none of the key warnings beforehand. A clean report does not cancel out clicking, vanishing files or repeated errors.
Quick Severity Guide
| Sign | Urgency | What to do |
| Clicking or ticking | Critical | Power off now |
| Grinding or scraping | Critical | Power off now |
| Beeping, buzzing, or no spin-up | Critical | Power off, check cable or port once |
| Drive disappears intermittently | Critical | Back up what you can, power off if it drops out |
| Drive missing from BIOS | High | Check SATA cable and power connector, then get it diagnosed |
| “No bootable device” | High | Check boot order, then check the drive |
| Repeated storage blue screens | High | Back up, then diagnose |
| Corrupted or unreadable files | High | Back up today |
| Errors when saving or copying | High | Stop writing, back up today |
| Missing files or folders | High | Stop saving to the drive, back up |
| S.M.A.R.T. Caution or Bad | High | Back up today, plan a replacement |
| Rising bad or pending sectors | High | Back up today |
| CHKDSK on every start-up | Moderate to high | Back up before more scans |
| Slowdowns and 100% disk usage | Moderate | Monitor, back up, check for software causes |
What to Do Immediately
- Back up what you can if the drive still works normally. Copy your most important files first (photos, documents, work files) to another drive or cloud storage.
- Power off if the drive is clicking, grinding, or disappearing. Do not keep trying to boot it.
- Do not run CHKDSK, repair tools or bad-sector scans on a drive that is struggling. They force it to read every sector and can speed up the damage.
- Do not open the drive or put it in the freezer. Both can make things worse.
- Get it diagnosed. If the drive is clicking, grinding, disappearing or producing repeated read errors, contact a professional data recovery service. Avoid repair tools and repeated power-ups to prevent further damage.
Need Help Diagnosing a Failing Hard Drive?
If your hard drive is making unusual noises, disappearing from Windows or producing repeated read errors, the next step depends on whether your priority is recovering data or getting your computer working again. At Computer Mechanics Perth, can help assess whether the issue is with the drive, its connections or another component, and explain the available options before you decide how to proceed.
Frequently Asked Questions
1. How do I know if my hard drive is dying?
The main signs of dying hard drives are clicking or grinding noises, frequent freezing, corrupted or missing files, a drive that disappears from File Explorer or the BIOS, and S.M.A.R.T. warnings. One sign alone may have another cause. Two or more together, especially noise or disappearing, strongly suggest the drive is failing.
2. Does a clicking hard drive always mean it is failing?
A repeated click that does not stop almost always signals a mechanical problem, usually with the read/write heads. An occasional soft tick during start-up can be normal. If the clicking is rhythmic, new, or paired with errors or missing files, power the drive off.
3. Can a hard drive fail with no warning signs?
Yes. Sudden failures from a dead PCB or a seized spindle motor can happen without warning, and S.M.A.R.T. does not predict every failure. That is why regular backups matter more than any health check.
4. Can I check my hard drive’s health myself?
Yes. Use PowerShell’s Get-PhysicalDisk, or a free tool such as CrystalDiskInfo, to read the S.M.A.R.T. status. Back up first. If the drive is making noise or has gone missing, do not run scans. Get it diagnosed instead.
