What is the main difference between HDD and SSD?
HDD uses spinning magnetic platters; SSD uses flash memory
HDD stores data on rotating magnetic disks with mechanical parts, making it slower and more fragile. SSD uses NAND flash chips with no moving parts, making it faster and more durable
Why is an HDD more vulnerable to physical damage?
It has moving mechanical parts
HDD contains spinning platters and an actuator arm. Sudden shocks can damage these components and cause data loss
What is form factor in storage devices?
The physical size and shape of the drive
Form factor refers only to the physical dimensions of the drive, not its speed or performance
What are common storage form factors?
2.5-inch and M.2.
2.5-inch drives are commonly used in laptops. M.2 drives are smaller and used in modern laptops and desktops.
What is an interface in storage technology?
The method used to transfer data between the drive and motherboard.
The interface determines how data is communicated and directly affects performance
What is the maximum speed of SATA III?
6 Gbps
SATA III is commonly used for HDDs and SATA SSDs. It is significantly slower than NVMe.
What interface does NVMe use?
PCIe
NVMe uses PCIe lanes instead of SATA, allowing much faster data transfer speeds and lower latency.
Which is faster: SATA or NVMe?
NVMe
NVMe drives use PCIe and can achieve speeds several times faster than SATA-based drives
Is M.2 always NVMe?
No
M.2 is a form factor. It can use either SATA (slower) or NVMe (faster) as its interface
If a laptop has an M.2 drive but performance is similar to SATA, what is the likely interface?
M.2 SATA
Even though the drive is M.2, it may still use the SATA interface, which limits its speed to SATA performance levels.
What is the main benefit of cloning an HDD to an SSD?
Move everything without reinstalling the OS.
Cloning copies the entire HDD, including OS, programs, and data, so you don’t need to reinstall or reconfigure the system
What software is needed for HDD to SSD migration?
Imaging or cloning software
Can be included with the SSD or downloaded (commercial/open source) like Macrium Reflect, Acronis True Image, or Clonezilla.
What is “drive-to-drive image” or cloning?
Clone directly from HDD to SSD
Data is copied directly without creating a separate image file. Usually faster and simpler if both drives are connected
What must you check before migrating from HDD to SSD?
SSD has enough capacity for the HDD content
Ensure all files and OS fit; otherwise migration will fail or data will be lost
After cloning HDD to SSD, what should you do?
Set SSD as boot drive in BIOS/UEFI
The system must boot from the new SSD. Some cloning software also resizes partitions to optimize the SSD
