The Vault – Archive

Data Clinic information archive

The Archive contains lots of information about hard drives and data recovery that we’ve been compiling since 2002. Whilst you’ll find up to date information about current issues and problems throughout the rest of the site, the archive contains pages that we feel are still relevant but don’t really have a place anywhere else.

Help and Advice (Older Pages)

For the most recent hard drive and data recovery help and advice pages to here: https://www.dataclinic.co.uk/known-issues-case-studies/


The Causes of Hard Drive Failure

The causes of hard drive failure – Part 1
The causes of hard drive failure – Part 2
The causes of hard drive failure – Part 3

General ADR

Hard Drive Head Misalignment
Water / Flood Damaged Hard Drives

Why, What and How ?

What are the advantages and disadvantages of external hard drives? https://www.dataclinic.co.uk/advantages-disadvantages-external-hard-disk-drives-usb-firewire
Why do hard drives tick ? https://www.dataclinic.co.uk/data-recovery-ticking-hard-disk-head-problem/
What is a head crash ? https://www.dataclinic.co.uk/what-is-a-head-crash-hard-disk-drive-information/
How to disable Scandisk and Chkdsk https://www.dataclinic.co.uk/disable-scandisk-chkdsk/
Why use of Scandisk and Chkdsk should be avoided https://www.dataclinic.co.uk/scandisk-chkdsk-disk-checking-repair-software/
What are hard drive CRC errors ? https://www.dataclinic.co.uk/hard-disk-crc/
How bad sector repair programs work (flow chart) https://www.dataclinic.co.uk/hard-disk-regenerator-repair-flow-chart/

Even Older Stuff

Maxtor hard drive recovery https://www.dataclinic.co.uk/maxtor-hard-disk-recovery/
Retrieving data from Maxtor DiamondMax 22 hard drives https://www.dataclinic.co.uk/data-recovery-maxtor-diamondmax-22/
Quantum hard drives https://www.dataclinic.co.uk/quantum-hard-disk-data-recovery/
Recovering data from an ATA password protected Fujitsu drive https://www.dataclinic.co.uk/data-recovery-case-study-fujitsu-mhu2100at/
Same thing on an ATA password protected Seagate Momentus https://www.dataclinic.co.uk/data-recovery-case-study-seagate-momentus-5400/
The old IBM Deskstar https://www.dataclinic.co.uk/data-recovery-ibm-deskstar-hard-disk-drive/
Data recovery on Apple X-Serve
Police ACPO Guidelines
26P05AVG Chip Corruption
ATA password protected Fujitsu MHU2100AT Hard Drive
ATA password protected Seagate Momentus
Maxtor Hard Drive Firmware Faults
Data Recovery Maxtor N40P
IBM and Hitachi Deskstar Data Recovery
Data Recovery Maxtor DiamondMax 22
Data Recovery Seagate 7200.11
Seagate Momentus hard drive data recovery
Hard Drive Head Faults
Western Digital Caviar Hard Drive Recovery
Western Digital Caviar Noisy Hard Drives
Data Recovery Western Digital Protege
Data Recovery from Western Digital WD10TMVV
Windows Hard Drive Error Messages
Data Recovery XFS Filesystem
How to enable and disable Scandisk and Chkdsk
Data Recovery Fujitsu MPF and MPG Hard Drives
Invalid CRC – Hard Drive CRC (Cyclic Redundancy Check) 
How Do Data Recovery Programs Work ?
The Differences between helium and air filled HDDs
Linux Filesystems and Disk i/o
Data Recovery ATA Password Protected Hard Drive
RAID Disk Status Codes on Dell Servers
RAID Parity Calculation Using The XOR Operation
Fitbit Data Recovery
NetGear ReadyNAS data recovery
Lacie NAS Data Recovery
Recovering data from hard drives with bad sectors
Recovering data from Format and Fdisk
Don’t Run Scandisk, Chkdsk or Fsck
Soldered MacBook SSD’s and the T2 Security Chip
Why Swapping Controller Boards On Hard Drives Doesn’t Work


Windows / BIOS errors you may see when you have a HDD problem https://www.dataclinic.co.uk/data-recovery-windows-disk-error-messages/
Corrupt 25P05AVG HDD chips https://www.dataclinic.co.uk/corrupt-25p05avg-flash-chip-hard-disk-drive/
Seized spindles and data recovery https://www.dataclinic.co.uk/data-recovery-hard-disk-drive-seized-spindle/
Jaz and Zip disk recovery https://www.dataclinic.co.uk/data-recovery-jaz-zip-disk/
Recovering the data from XFS hard drives https://www.dataclinic.co.uk/data-recovery-xfs-hard-drive/
Recovery and repair of deleted, corrupted SQL databases https://www.dataclinic.co.uk/recover-deleted-data-from-SQL-database/
The use of the XOR operating in calculating RAID parity https://www.dataclinic.co.uk/raid-parity-xor/
A discussion of native and journal file systems on Linux and disk I/O operations https://www.dataclinic.co.uk/linux-file-systems-and-disk-io/
Reading the signals from faulty HDD heads on an oscilloscope https://www.dataclinic.co.uk/hard-disk-head-signals-1/
Hard drive defects table – P & G Lists
Restoring data after an HDD Format or Fdisk
SCSI HDDs – A common error message
Recovering files from flash cards and memory sticks