![]() ![]() With spinning disks, there are 2 important lines which are ‘Reallocated_Sector_Ct’ and ‘Current_Pending_Sector’ count, the reallocated sector count means you have bad sectors but the disk has dealt with them fine, this is not terrible if the count is either low <1000 or static and not growing over time if however you have Current_Pending_Sectors for more than 24 hours that means the disk has issues and it cannot deal with them itself, this is critical. You can then check the disk health with: #smatctl -a /dev/sda With spinning disks let us again assume that the disk is /dev/sda you can run a short or a long test as follows: #smartctl -t short -a /dev/sda (This is a short self test) To see the overall health you can check the ‘Wear_leveling_count’ line, this starts at 100 and reduces down to 0, again this is simply a vendor estimate of the % of the remaining life of the disk if you are getting filesystem issues and slow performance then the disk may be at the end of its best days. This command lists all block devices, including disks, partitions, and other storage. You are then looking for any specific errors logged at the end which will be very obvious and titled as errors, if you find these please copy and paste them into a ticket for us to review. One method to check disk type in Linux is to use the lsblk command. #smartctl -t long -a /dev/sda (This is a long self test) With SSD’s you can use the regular smart tests, assuming that the disk is /dev/sda you can run a short or a long test as follows: #smartctl -t short -a /dev/sda (This is a short self test) It is however VERY important to keep in mind that you can be at 100% and still see no issues with the disk, this is simply a vendor estimate of the % of the remaining life of the disk if you are getting filesystem issues and slow performance then the disk may be at the end of its best days. The closer to 100% you get the more your disk is close to the end of its predicted life. NVMe support required Windows 10/Server 2016 or later. NET Framework 4.8 or later is required to use the latest email notification features. Standard Edition Shizuku Edition Kurei Kei Edition Download System Requirements. If your company uses the Ubuntu Linux operating system. CrystalDiskInfo About CrystalDiskInfo A HDD/SSD utility software which supports a part of USB, Intel RAID and NVMe. Includes information on storage used & drive health. Now we know the disk is nvme0 we can check its health: Chkdsk is the Windows command for checking hard drives for errors and repairing them, if possible. Download the latest version of Crucial Storage Executive to get the most from your SSD hard drive. Node SN Model Namespace Usage Format FW Rev You will see a list of NVMe disks: # nvme list If you do not have this installed use your package manager to install ‘nvme-cli’, you will also need ‘smartmontools’ It is a good idea to do regular checks of your server disks, however with a number of disk types now, Spinning HDD’s SSD’s and NVMe disks there are different ways to check them, this guide is intended to give you indications only it is not black and white between good and bad disks. ![]()
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