Data Recovery Glossary

Tailpacking to TrueCrypt

Data Recovery Glossary home

List of pages

A - Access Rights to ASCII

B - Backup to BTRFS

C - CANON_DC to Cross-linked Files

D - DAS to Dynamic Disk

E - ECC to External Hard Drive

F - Failed Disk to fsck

G - Gigabyte to GUID

H - Hard Drive to Hybrid Disk

I - IDE to Internal Drive

J - JBOD to Jumper

L - LBA to LVM

M - Megabyte to Motherboard

N - NAS to Nuke & Pave

O - Operator Error to Overwritten Data

P - Parallel ATA to PSU

Q - QNAP to Quota

R - RAID to Resident File

S - SAS to Synology Hybrid RAID

T - Tailpacking to TrueCrypt

U - UDMA to USB Thumbdrive

W - WD to Write-Through Cache




Tailpacking - the technology used in some filesystems (e.g. in ReiserFS). It allows to decrease a disk space loss due to slack space by storing parts of several different files in one cluster.


TB (terabyte) - 1,024 GB (gigabytes), 1,048,576 MB (megabytes), 1,099,511,627,776 bytes.

Thin provisioning

Thin provisioning - a feature introduced in Storage Spaces, in Windows 8 and Windows Server 2012, which allows to create a virtual storage larger than a real physical disk size.


Thumbdrive - a device to store data. Generally it doesn't differ from a memory card except that it is connected to a computer via an USB port.


TLER (Time Limited Error Recovery) - the technology of error correction invented by Western Digital. TLER-enabled hard drive has a fairly small limit on how long the error recovery takes. After that time, the error reported back to the controller and the error recovery stops. TLER is used in hard drives of RAID Edition series.


TRIM - a command which erases unused flash memory blocks on SSD in advance to speed up subsequent writing.


TrueCrypt - the program to encrypt data on-the-fly for Windows, Linux, and Mac OS.


TrueNAS CORE is a project to which FreeNAS was turned into. The unification is completed in October 2021.

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