8.5 Flashcards
View the currently mounted volumes on the system.
mount
View which file systems are mounted to specific mount points.
df
is the process of making a storage device accessible to users through the directory tree. The file system directory that is used to access the files on the device is called the mount point
mounting
Partitions and LVM logical volumes are represented by device files located in the _______ directory. However, these storage devices must be mounted before the data on them can be accessed.
/dev
A storage device can be mounted in a directory in the __________
file system
You should mount storage devices in_____ directories.
empty
View the currently mounted volumes on the system
mount
View which file systems are mounted to specific mount points
df
Unmount a volume or device from the system. If a “disk is busy” error message is displayed when unmounting a device:
umount [device]
umount [mountpoint]
Disk volumes, especially RAID sets may show a status of degraded. This means that I/O errors have been detected on a region of the disk. This can occurs when one disk in a RAID set is offline or is unable to provide the proper RAID redundancy.
Degraded storage
A storage device with hardware problems may not show in the /dev directory. Or, the partitions on a storage device might be missing.
Missing devices
or missing volumes
Missing mount points indicate that a partition is not mounted. Often, this happens after a reboot.
Missing mount point
A slow disk can dramatically affect the total performance of a Linux system, especially if the system partition is on the slow disk.
disk performance
A full volume, especially if it is the system volume can cause Linux to freeze or crash.
resource exhasution
Physical storage devices are attached to storage adapters. Example are SCSI, RAID, SATA host bus adapters (HBAs). Other HBAs, like a Fiber Channel adapter can connect to storage area networks.
Adapters
