I have a roughly 10-year-old HP Pavilion laptop running Ubuntu. It was also slow and unstable under Windows, and applications such as Firefox, Inkscape, and the software updater frequently crash. The laptop has about 8 GiB of RAM, with around 6 GiB currently in use, and a 1 TB mechanical hard drive. The disk utility reports that the drive is OK, but the system still feels extremely slow. I may also need to replace the battery. Should I upgrade the hard drive to an SSD or add more RAM first? Is there a reliable way to test whether the RAM or hard drive is failing?
4 Answers
Test the RAM with MemTest86 or Memtest86+ from a bootable USB and let it run for several passes. For the hard drive, inspect its SMART data with a disk utility such as smartctl or the graphical Disks tool, and look for pending, reallocated, or uncorrectable sectors. Also check temperatures and system logs, since overheating, bad drivers, or software problems can cause crashes even when the hardware tests pass.
The biggest improvement will probably come from replacing the mechanical hard drive with a SATA SSD. Even if the drive isn't technically failing, an old HDD is much slower and can make the whole system feel sluggish, especially when Ubuntu starts using swap. An SSD should make booting and launching programs dramatically faster. Check the laptop's exact Pavilion model to confirm the drive interface and the maximum supported RAM.
With roughly 8 GiB of RAM, you aren't necessarily short on memory for normal desktop use, but having only a small amount free can cause slowdowns if several programs are open. Check system monitor while reproducing the problem: if memory is nearly full and swap activity is high, adding RAM could help. If RAM usage isn't consistently maxed out, prioritize the SSD instead.
The 2.2 GiB of swap is disk space Ubuntu uses when it needs more virtual memory than physical RAM provides. Swap prevents crashes, but on a mechanical hard drive it is very slow.
Before buying parts, identify the exact HP Pavilion model and check whether it has one or two RAM slots, the maximum supported memory, and whether the drive is a standard 2.5-inch SATA unit. In many laptops, moving from an HDD to a SATA SSD is a simple and worthwhile upgrade. If the machine already has 8 GiB and the crashes continue after the SSD upgrade, then investigate the RAM, overheating, and the Ubuntu installation next.
The disk utility's “OK” status mainly means it hasn't detected an obvious SMART failure. It doesn't mean the drive is fast or guaranteed to remain reliable, so back up important files before replacing or testing it.