|
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
Z - ZFS
|
|
JBOD
JBOD (Just a Bunch Of Disks) - see spanned volume.
JFS
JFS (Journaled File System) -
64-bit journaling filesystem designed by IBM.
Journal replay
Journal replay - the process of re-doing operations marked as unfinished in a filesystem log file to restore a filesystem consistency.
Journal replay is performed every time the filesystem is mounted in journaling filesystems, such as NTFS or ext.
Journaling filesystem
Journaling filesystem -
the filesystem which uses a journal (also called log file or intention log)
to track a list of scheduled and completed operations.
Journaling allows maintaining filesystem integrity without time-consuming integrity checks.
Jumper
Jumper - a small clip used to specify a mode of device operation by shorting or breaking some specific circuit.
Jumpers are often grouped into blocks to allow selecting one of the operating modes.
Jumpers are typically used to:
- reset the BIOS settings,
- force hard drives to report smaller than the actual capacity to the host system for compatibility reasons
(so called capacity clipping),
- switch hard drives using SATA II to SATA I to provide compatibility with SATA I controllers,
- select Master/Slave mode on the Parallel ATA (IDE) disks.
|