Hard disk drive

A hard disk drive (HDD), hard disk, hard drive, or fixed disk[b] is an electro-mechanical data storage device that uses magnetic storage to store and retrieve digital information using one or more rigid rapidly rotating disks (platters) coated with magnetic material.

Activities

1. Learn about SDD storage technology and compare it with HDD technology
2. Use lsblk and blkid commands in Linux to identify your HDD devices
3. Use iotop, iostat and sar -d in Linux to assess you disk usage

See also

• Block devices: blkid (UUID), lshw -class disk, hwinfo --disk, udevadm, rescan-scsi-bus.sh, LUN, hdparm, findfs, Add a new disk
• lsblk, pvscan lspci, lsscsi, smartctl, fdisk, parted, Kpartx, pvdiplay, pvs, udisksctl, /dev/sd, nvme list
• IO performance: iotop, iostat, sar -d, fio, nmon, vmstat -d, dd, nmon, stress
• CPU, memory
• cp, rsync and dd linux commands
• Block devices: HDD, SSD, Intel Optane, block size
• Storage: Fibre Channel, Disk arrays, Disk array shelves, Disk array controller, CD-ROM, DVD, Tape library, LTO, HDD, SSD, SCSI, iSCSI, SAS, SATA, SEDs, OPAL, Magnetic storage, WORM