December 2002
Intermediate to advanced
260 pages
9h 18m
English
Content preview from Managing RAID on LinuxBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Deprecated Kernel Options
The following options are no longer shown in the configuration
options for current kernel revisions. These features were originally
experimental, but are now a standard part of the RAID subsystem. If
you are using a kernel newer than 2.2.X, the options are enabled
transparently as part of multiple devices support
(CONFIG_BLK_DEV_MD). When using older kernels, you
must explicitly enable these features if you require them.
- Autodetect support
(
CONFIG_AUTODETECT_RAID) CONFIG_AUTODETECT_RAIDenables support for RAID autodetection during boot time. Traditionally, users have to execute commands from their init scripts in order to manually activate RAID devices. Autodetection allows the kernel to scan block devices for information about the arrays they belong to, and consequently to activate the devices while the system boots. This saves administrators from having to run the raidstart command in the system’s startup files or at the command line. For RAID devices to be successfully autodetected, you must use fdisk or an equivalent partitioning program to set them to partition type Linux Raid Auto (0xFD). Some programs might simply list Linux RAID as the partition type. Please refer to the Partitioning with fdisk section of Chapter 3 for more information on this.- Boot support
(
CONFIG_MD_BOOT) CONFIG_MD_BOOTis available with the RAID patches for older kernels and is standard in 2.4 and higher. Boot support allows arrays to be used at boot time, meaning that Linux can ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.