"JBD" redirects here. For Jernbanedirektoratet, see Norwegian Railway Directorate.
JBD, or journaling block device, is a generic block device journaling layer in the Linux kernel written by Stephen Tweedie from Red Hat. JBD is filesystem-independent. ext3, ext4 and OCFS2 are known to use JBD.[1][2]
JBD exists in two versions, JBD and JBD2. JBD was created with ext3 in 1998.[3] JBD2 was forked from JBD in 2006 with ext4, with the goal of supporting a 64-bit (as opposed to 32-bit-only in JBD) block number. As a result, the maximum volume size in ext4 is increased to 1 EiB compared to 16 TiB in ext3 (assuming 4 KiB blocks).[4] JBD2 is backward-compatible. OCFS2 starting from Linux 2.6.28 uses JBD2.[5] The old JBD was removed with the dedicated ext3 driver in Linux 4.3 (2015).[6]
^"The Linux Journalling API". The Linux Kernel documentation.
^Kedar Sovani (June 20, 2006). "Linux: The Journaling Block Device". KernelTrap. Archived from the original on 2007-09-26.
^Stephen C. Tweedie (May 1998). "Journaling the Linux ext2fs Filesystem" (PDF). Proceedings of the 4th Annual LinuxExpo, Durham, NC. Retrieved 2007-06-23.
^Mingming Cao (9 August 2006). "Forking ext4 filesystem and JBD2" (Mailing list). Linux kernel mailing list.
^"Linux 2.6.28". kernelnewbies.org. 2008.
^Corbet, Jonathan. "rm -r fs/ext3". LWN.net.
and 20 Related for: Journaling block device information
JBD, or journalingblockdevice, is a generic blockdevicejournaling layer in the Linux kernel written by Stephen Tweedie from Red Hat. JBD is filesystem-independent...
A journaling file system is a file system that keeps track of changes not yet committed to the file system's main part by recording the goal of such changes...
On Linux, network blockdevice (NBD) is a network protocol that can be used to forward a blockdevice (typically a hard disk or partition) from one machine...
There are two general kinds of device files in Unix-like operating systems, known as character special files and block special files. The difference between...
Distributed Replicated BlockDevice (DRBD) is a distributed replicated storage system for the Linux platform. It is implemented as a kernel driver, several...
spanning multiple physical storage devices. XFS ensures the consistency of data by employing metadata journaling and supporting write barriers. Space...
Stephen Tweedie first revealed that he was working on extending ext2 in Journaling the Linux ext2fs Filesystem in a 1998 paper, and later in a February 1999...
size and thus prevents uninitialised blocks appearing in a file under node failure conditions. The default journaling mode is data=ordered, to match ext3's...
intrauterine device (IUD), also known as intrauterine contraceptive device (IUCD or ICD) or coil, is a small, often T-shaped birth control device that is inserted...
have case-sensitivity. Metadata-only journaling was introduced in the Mac OS X 10.2.2 HFS Plus driver; journaling is enabled by default on Mac OS X 10...
by ASCIIbetical order, are: badblocks search a device for bad blocks blkid locate/print blockdevice attributes chattr change file attributes on a Linux...
pacemaker, commonly referred to as simply a pacemaker, is an implanted medical device that generates electrical pulses delivered by electrodes to one or more...
environments. ReiserFS – File system that uses journaling Reiser4 – File system that uses journaling, newest version of ReiserFS Reliance – Datalight's...
restrictions in the block driver mean that ext2 filesystems have a maximum file size of 2 TiB. ext2 is still recommended over journaling file systems on bootable...
A device fingerprint or machine fingerprint is information collected about the software and hardware of a remote computing device for the purpose of identification...
and documented manner. LUKS is used to encrypt a blockdevice. The contents of the encrypted device are arbitrary, and therefore any filesystem can be...
including Veritas Software Corp. (journaling) VxFS, Sun Microsystems (clustering) QFS, Sun Microsystems (journaling) UFS, and Sun Microsystems (open source...
patient is blocking access to another victim. Brown, Nick (2015). "Should the Kendrick Extrication Device have a place in pre-hospital care?". Journal of Paramedic...
address blocking or IP banning is a configuration of a network service that blocks requests from hosts with certain IP addresses. IP address blocking is commonly...
Global Information