Data Recovery Glossary

WD to Write-Through Cache

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

X - X-RAID2

WD (Western Digital)

WD (Western Digital) - a hard drive manufacturer known by the Caviar family of the hard drives and a TLER feature of its RAID-certified hard drives.

Wipe

Wipe - see Secure Erase.

Write-Back Cache

Write-Back Cache - an implementation of a write cache which doesn't update underlying storage immediately. Sometimes updates are only committed when certain conditions are satisfied. For example, the RAID W/B cache may have a policy to write full stripes whenever possible. With a write-back cache there is a risk of losing buffered writes if a power failure occurs and the cache does not have a battery backup.

Write-Through Cache

Write-Through Cache - a cache which updates the underlying data immediately. Compared to write-back cache, write-through cache provides lower performance, but does not risk losing buffered writes in a power failure.

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