LBA
LBA (Logical Block Addressing) -
the method of addressing a sector on a hard drive.
The original implementation of LBA used 28 bits for the address, allowing a maximum hard drive size of 128GB with 512-byte sectors.
LBA48
LBA48 -
the variation of LBA which uses 48 bits for a sector address.
It allows using disks larger than 128GB (137 decimal gigabytes) without increasing the sector size.
LDM
LDM (Local Disk Manager) -
Windows component which works with dynamic disks and software RAIDs.
Log file
Log file - see Journaling filesystem.
Logical damage
Logical damage - failures not related to mechanical damage of the system components.
It can be either a filesystem failure or a failure of RAID controlling software.
Logical drive
A part of the Extended Partition in MBR (basic) disks.
Lost clusters
Lost clusters - a filesystem error when a cluster is marked as occupied but it doesn't belong to any file.
Low level format
Low level format, also known as "complete format" -
a type of the format process when data is deleted irreversibly
(it is impossible to recover overwritten data).
LUN
LUN (Logical Unit Number) -
a part of device address in the SCSI standard.
LVM
LVM (Logical Volume Manager) -
a partitioning technology used in Linux.
LVM allows one to change partition sizes easily.
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