Replacing a CD-ROM with an SSD in a laptop: a complete guide from choosing an adapter to setting up Windows

Outdated drive CD/DVD-ROM takes up precious space in your laptop, which can be put to good use by installing SSD drive. Such an upgrade will not only free up a slot for a second disk, but will also significantly speed up the system if you transfer the operating system or frequently used programs to the new SSD. However, the replacement process has nuances: from choosing the right adapter (caddy) before setup BIOS/UEFI and data migration.

In this article we will look at all the critical points of replacing a CD-ROM with an SSD in laptops of different brands (Lenovo, HP, Dell, Asus etc.), including adapter compatibility, possible installation errors and how to resolve them. You will learn how to avoid common problems with disk detection in the system, why some adapters do not work with NVMe-drives, and how to correctly transfer Windows without losing data. If your laptop was released after 2012, the chances of a successful upgrade are close to 100% - the main thing is to follow the instructions.

Why you should replace CD-ROM with SSD: 5 good reasons

Even if you rarely use discs, removing the CD/DVD drive provides noticeable benefits:

• 🚀 System acceleration: The SSD in the CD-ROM slot can be used as a cache drive for frequently used programs or as a separate drive for games/projects. For example, Samsung 870 EVO in this slot shows the reading speed up to 560 MB/s - 5–10 times faster than HDD.
• 💾 Extra space: Modern games (Cyberpunk 2077, Call of Duty: Warzone) occupy by 100+ GB. A second SSD solves the problem of running out of space without purchasing an external drive.
• 🔧 Simplifying upgrades: Many laptops (eg Lenovo ThinkPad T480 or Dell Latitude E7470) have only one slot for M.2 SSD. CD-ROM swapping allows you to add a second drive without replacing the primary drive.
• 🔋 Energy Saving: SSD consumes 3-4 times less power than CD-ROM drive, which increases battery life by 10–15%.
• 💰 Low cost: Replacement adapter (caddy) is worth 500–1500 ₽, and SSD on 500 GB - from 3000 ₽. It's cheaper than buying a new laptop.

However, there are also pitfalls. For example, in some models (HP Pavilion 15 or Acer Aspire 5) after installing the SSD in the CD-ROM slot, the optical drive may disappear in BIOS, which blocks downloading from it. Also, not all adapters support UASP (protocol for accelerating data transfer), which can cause SSD speed to be limited 300 MB/s instead of declared 500+ MB/s.

Which adapter (caddy) to choose to replace a CD-ROM with an SSD

Adapter (or caddy) is an adapter that is installed instead of a CD-ROM drive and allows you to connect 2.5" SSD or HDD via interface SATA. Key parameters when choosing:

Parameter	Explanation	Recommendations
Thickness	Standard drives are 9.5 mm And 12.7 mm	Suitable for most laptops 9.5 mm. Check the thickness of your drive with a caliper or model specifications.
Interface	SATA II (up to 300 MB/s) or SATA III (up to 600 MB/s)	Choose SATA III, even if the laptop only supports SATA II — the adapter will operate at the maximum speed of the device.
UASP support	Protocol to speed up data transfer	Required for SSD. Look for adapters marked "UASP Support" (For example, ORICO 2189US3).
Housing material	Plastic or metal	Metal adapters (Delock 41340) dissipate heat better, but can create interference with Wi-Fi.
BIOS Compatible	Some adapters are not detected in BIOS old laptops	Check reviews for your model. For example, for Dell Inspiron 15 fits Sabrent EC-SATA.

Important: Some adapters have jumper to select mode Master/Slave. For SSD it needs to be set to Master, otherwise the disk may not be detected. Also avoid cheap Chinese adapters without a brand - they often do not support hot-swap (hot plugging) and may damage the connector SATA with frequent connections.

⚠️ Attention: In laptops Apple MacBook Pro (until 2015) and some models Sony Vaio The CD-ROM drive is connected via a proprietary connector, not a standard one SATA. They will require a special adapter (for example, OWC Data Doubler for MacBook).

Step-by-step instructions: how to physically install an SSD instead of a CD-ROM

Before starting work necessarily:

• 🔌 Disconnect the laptop from the network and remove the battery (if it is removable).
• 🛠️ Prepare tools: Phillips screwdriver (usually PH0 or PH1), a plastic spatula for releasing the latches, an antistatic wrist strap (optional).
• 📸 Take a photo of the location of the screws and connectors before disassembling - this will help put everything back together.

Next, follow the algorithm:

1. Remove the bottom cover of the laptop:

   In most models (Lenovo IdeaPad, Asus Vivobook) the cover is secured with 6–8 screws. B MacBook you will need a special screwdriver P5 Pentalobe. Carefully pry the lid open with a plastic spatula, starting from the corner - many laptops have hidden latches.

2. Remove the CD-ROM drive:

   It is usually secured with 2-4 screws on the underside. After unscrewing, pull the drive towards you - it should come out of the connector SATA. On some models (HP EliteBook) the drive is additionally fixed with a metal bracket.

3. Install the SSD into the adapter:

   Secure the drive to caddy four screws (usually included). Make sure the connector SATA on the SSD matches the adapter connector. Some adapters require additional power supply via MOLEX - this is true for older laptops (Dell Latitude D630).

4. Connect the adapter to your laptop:

   Insert the adapter with the SSD into the slot instead of the CD-ROM and secure with screws. Make sure the connector SATA fits tightly into the socket - play can lead to reading errors.

The adapter screws are tightened tightly|The SATA connector is not bent and is completely seated|The laptop battery is disconnected (if removable)|There are no foreign objects inside the case-->

After assembly, turn on the laptop and check if the new disk is detected in BIOS (key F2, Del or Esc when loading). If the SSD is not visible, try:

• 🔄 Reconnect the adapter (sometimes removing/inserting again helps).
• 🔧 Refresh BIOS to the latest version (on the laptop manufacturer's website).
• 🔌 Check settings SATA Mode in BIOS - mode must be selected AHCI, not IDE.

Setting up BIOS and initializing SSD in Windows

If the SSD is detected in BIOS, but is not visible in Windows, you need to initialize it via Disk management:

1. Click Win + X and select Disk management.
2. Find a new drive (usually marked as "Not distributed").
3. Right click and select Create a simple volume.
4. Follow the wizard by selecting a file system NTFS and drive letter (for example, D:).

If the disc does not appear even after Disk Management, check:

• 🔍 Driver Signature Enforcement: Windows 10/11 sometimes blocks uncertified adapter drivers. Launch a command prompt as administrator and run:

  bcdedit.exe /set nointegritychecks on

  Then restart your laptop.

• 🔧 SATA mode: B BIOS switch SATA Mode with IDE on AHCI. After this, Windows may not boot - you will need editing the registry.

⚠️ Attention: If after changing the mode SATA on AHCI Windows stops booting, follow these steps:

1. Boot from Windows installation flash drive (select System Restore).
2. At the command prompt, enter:

   regedit

   Follow the path HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\storahci and set the parameter Start in meaning 0.

3. Reboot - the system should boot into AHCI.

For maximum SSD performance it is also recommended:

• 🚀 Disable indexing for a new disk (Disk properties → uncheck Allow indexing...).
• 🔄 Disable defragmentation for SSD (it only reduces the life of the drive).
• 🔋 Enable TRIM (enabled by default in Windows 10/11). Check with the command:

  fsutil behavior query DisableDeleteNotify

  If the result 0 — TRIM active

Transferring Windows to an SSD in a CD-ROM slot: 3 proven methods

If you want to use the new SSD as a system drive, transfer Windows to it from the old drive. Options:

1. Cloning using Macrium Reflect Free

Free utility that supports byte-by-byte cloning with changing the size of partitions. Step by step:

1. Connect the SSD to the laptop via USB-SATA adapter (or install it in the second slot).
2. Run Macrium Reflect, select the system drive and click Clone this disk.
3. Select target SSD, check the option Resize partitions and start the process.
4. After cloning, disconnect the old drive and boot from the new SSD.

2. Transfer using Samsung Data Migration (only for Samsung SSD)

Official utility from Samsung optimized for their drives (870 EVO, 980 PRO). Benefit: Automatically adjusts partition alignment for maximum speed. Disadvantage: Does not work with SSDs from other brands.

3. Clean installation of Windows

If you want a "fresh" system without garbage, install Windows on a new SSD from scratch:

1. Create a bootable USB flash drive using Rufus or Media Creation Tool.
2. Boot from the flash drive, select a new SSD to install.
3. After installation, transfer your personal files from the old drive.

Important: if you cloned the system onto an SSD into the CD-ROM slot, and left the old disk in place, BIOS A bootloader conflict may occur. To avoid this, disconnect the old drive when you boot from the new SSD for the first time, or manually select the boot device (key F12, Esc or F9 at start).

Typical problems after replacing a CD-ROM with an SSD and their solutions

Even with proper installation, problems may occur. Let's look at the most common ones:

Problem	Possible reason	Solution
SSD is not detected in BIOS	Incompatible adapter or SATA port disabled	Test the adapter on another laptop. Update your BIOS. On some models (Lenovo G50) you need to enable the option SATA ODD Port in BIOS.
The drive is visible in the BIOS, but not in Windows	Missing drive letter or initialization	Run Disk management → assign a letter or initialize the drive (see section above).
Low SSD speed (100–200 MB/s)	The adapter operates in mode SATA II or without UASP	Check your BIOS settings (must be AHCI). Replace the adapter with a model that supports UASP (For example, StarTech SAT225M225).
Laptop won't turn on after installation	Short circuit or incorrect connection	Disconnect the adapter and check if the laptop starts. Inspect the SATA connector for bent pins.
SSD gets hotter 60°C	Poor ventilation in the CD-ROM slot	Use an adapter with a metal housing. Install the program CrystalDiskInfo for temperature monitoring.

Particular attention should be paid to laptops with hybrid graphics (For example, Asus ROG Strix or MSI GF63). In them, the CD-ROM slot can be connected to the same controller SATA, the same as a discrete video card. In this case, installing an SSD may result in resource conflict, due to which the video card will work unstable. The solution is to disable discrete graphics in BIOS or use an adapter with a separate controller (for example, Delock 89356 with chip JMicron).

What should I do if the SSD in the CD-ROM slot is detected as a removable disk?

This problem is typical for adapters with a chip JMicron JMB575 (for example, in some models ORICO). To fix:

1. Download the driver JMicron from the official website.
2. B Device Manager update the controller driver.
3. Reboot the laptop - the disk should be detected as fixed.

If this does not help, replace the adapter with a model with a chip ASMedia ASM106x (For example, Sabrent EC-SATA).

Optimizing SSD performance in the CD-ROM slot: tips for maximum performance

To ensure your new SSD performs at full capacity, complete the following settings:

• 🔧 Disable swap files for SSD (if you have enough RAM). Go to Control Panel → System → Advanced system settings → Performance → Settings → Advanced → Virtual memory and uncheck the system disk.
• 📁 Transfer user folders (Documents, Downloads) to the HDD (if it remains in the system). This will reduce the load on the SSD.
• 🔄 Set up the Steam/Epic Games cache to the second disk. In the launcher settings, specify the path to the library on the HDD.
• ⚡ Enable High Performance Mode in Control Panel → Power Options. This will disable power saving for the SSD.

For gaming laptops (MSI GE76, Acer Predator) additionally recommended:

• 🎮 Install games on the SSD in the CD-ROM slot - this will reduce the level loading time by 30–50%.
• 🔊 Disable search indexing for game folders (right click on the folder → Properties → Allow Indexing...).

If you use an SSD as a cache drive for an HDD (technology Intel Smart Response or PrimoCache), please note:

• 📊 Optimal cache size - 20–30 GB for system files and 50–100 GB for games.
• 🔄 Caching reduces SSD resource (number of write cycles). For this purpose it is better to use inexpensive models (Kingston A400, Silicon Power A55).

FAQ: Frequently asked questions about replacing a CD-ROM with an SSD

Is it possible to install M.2 NVMe SSD instead of CD-ROM?

No, it’s not possible directly. The CD-ROM slot is connected via SATA, and NVMe uses PCIe. However, there are adapters that allow you to connect M.2 NVMe to SATA-port (for example, StarTech M.2 SATA Adapter), but the speed will be limited 600 MB/s (instead of 3500 MB/s at NVMe). For full use NVMe The main drive of the laptop needs to be replaced.

Will an adapter for an SSD work in a laptop with UEFI?

Yes, but there may be boot problems if the SSD is formatted in MBR, not GPT. For UEFI required:

1. Format the SSD to GPT (possible via DiskPart:

convert gpt

2. Enable the BIOS mode UEFI Boot (disable Legacy Support).

If Windows does not boot after cloning, try recreating EFI partition with the help Bootice.

How to transfer Windows from HDD to SSD if there is no space on drive C for a clone?

If your system partition occupies, for example, 400 GB, and the new SSD is 250 GB, do the following:

1. Clean up your C drive with CCleaner or WizTree (delete temporary files, browser cache, old restore points).
2. Reduce the size of the system partition to 100–150 GB with the help MiniTool Partition Wizard.
3. Clone the system partition only (no D: and other volumes).

If even after cleaning there is not enough space, install Windows on the SSD from scratch and transfer only user files.

Is it possible to put the CD-ROM back after installing the SSD?

Yes, but please note:

• If you removed the drive mounts during disassembly, they will have to be restored.
• In some laptops (Lenovo Yoga) after replacing the CD-ROM with an SSD, the drive is no longer detected due to a configuration change BIOS. In this case, resetting the BIOS or updating the firmware will help.
• If you turned off SATA ODD Port in BIOS, don't forget to turn it back on.

Which SSD is better to choose for installation instead of CD-ROM?

Recommendations for selection:

• Budget option: Crucial BX500 (500 GB, 540 MB/s) or Kingston A400 - reliable and cheap (~3500 ₽).
• Optimal choice: Samsung 870 EVO (550 MB/s, 600 TBW) or WD Blue SA510 - best price/quality ratio.
• For games: Seagate FireCuda 520 (PCIe 4.0, but you will need an adapter) or Corsair MP600 - high reading speeds (4950 MB/s).
• For caching: Intel 670p (QLC 3D NAND) - cheap and durable for frequent recordings.

Avoid SSDs with controllers Phison S11 (for example, some models ADATA SU630) - they often slow down when filled by more than 70%.