RAID0 - Revision history

Jimbo: Reverted edits by 173.88.199.104 (talk) to last revision by Jimbo

2012-08-25T21:55:03Z

Reverted edits by 173.88.199.104 (talk) to last revision by Jimbo

2012-08-13T14:32:36Z

2007-11-09T13:21:38Z

JBOD

2007-11-09T13:18:41Z

fast writes is really the only acceptable use for raid0

2007-11-09T13:15:45Z

2007-11-09T13:14:25Z

2007-11-09T13:12:59Z

JBOD

2007-11-09T13:07:53Z

Space

2007-11-09T09:20:57Z

Added link to RAID0 (Setup) guide

2007-09-04T20:12:35Z

Speed

← Older revision		Revision as of 21:55, 25 August 2012
Line 58:		Line 58:
	There is a working example of implementing RAID0 on FreeBSD documented in the article [[RAID0 (Setup)]].		There is a working example of implementing RAID0 on FreeBSD documented in the article [[RAID0 (Setup)]].

−	[[Category: ~~Configuring~~ FreeBSD]]	+	[[Category:FreeBSD Terminology]]
		+	[[Category:RAID]]

@@ Line 58: / Line 58: @@
 There is a working example of implementing RAID0 on FreeBSD documented in the article [[RAID0 (Setup)]].
-[[Category:FreeBSD Terminology]]
+[[Category: Configuring FreeBSD]]
-[[Category:RAID]]

@@ Line 36: / Line 36: @@
 === JBOD ===
-JBOD, which is simply "Just a Bunch Of Disks" is another method of mounting multiple physical drives as a single logical volume.  Unlike RAID0, it does not have the requirement of the disks having the same capacity, hence the name.  Also unlike RAID0, JBOD does not "stripe" each file across all of the disks in the volume, so it does not provide any speed advantage for accessing any given file.
+JBOD, which is simply "Just a Bunch Of Disks" is another method of mounting multiple physical drives as a single logical volume.  Unlike RAID0, it does not have the requirement of the disks having the same capacity, hence the name.  Also unlike RAID0, JBOD does not "stripe" each file across all of the disks in the volume, so it does not provide any speed advantage for accessing any given file.  Since there is no performance advantage, and any single disk can be mounted anywhere on the filesystem anyway (ie '''/usr/home''' can be a directory on a drive, or it can be an entire separate drive), there is no good reason to use disk concatenation on a unixlike operating system.
 === RAID 10 ===

← Older revision		Revision as of 13:18, 9 November 2007
Line 3:		Line 3:
	== Warning ==		== Warning ==

−	'''~~IT MUST BE STRESSED THAT RAID LEVEL 0~~ / ~~DISK STRIPING (AND THE~~ JBOD ~~VARIATION)~~ SHOULD NOT BE USED IN PRODUCTION ENVIRONMENTS ~~WHERE DATA INTEGRITY AND RELIABILITY MUST BE ASSURED.~~''' This RAID level should only be used where non-essential data needs reading or writing to disk quickly. Before implementing RAID0, you should first strongly consider using one of the fault tolerant RAID levels such as [[RAID1]], [[RAID3]], or [[RAID5]].	+	It must be stressed that '''RAID0/JBOD SHOULD NOT BE USED IN PRODUCTION ENVIRONMENTS''' where data integrity and reliability must be assured! This RAID level should only be used where non-essential data needs reading '''and''' writing to disk quickly. Before implementing RAID0, you should first strongly consider using one of the fault tolerant RAID levels such as [[RAID1]], [[RAID3]], or [[RAID5]].

← Older revision		Revision as of 13:15, 9 November 2007
Line 3:		Line 3:
	== Warning ==		== Warning ==

−	'''IT MUST BE STRESSED THAT RAID LEVEL 0 / DISK STRIPING (AND THE JBOD VARIATION) SHOULD NOT BE USED IN PRODUCTION ENVIRONMENTS WHERE DATA INTEGRITY AND RELIABILITY MUST BE ASSURED.''' This RAID level should only be used where non-essential data needs reading or writing to disk quickly. ~~Consider~~ using one of the fault tolerant RAID levels such as [[RAID1]], [[RAID3]], or [[RAID5]].	+	'''IT MUST BE STRESSED THAT RAID LEVEL 0 / DISK STRIPING (AND THE JBOD VARIATION) SHOULD NOT BE USED IN PRODUCTION ENVIRONMENTS WHERE DATA INTEGRITY AND RELIABILITY MUST BE ASSURED.''' This RAID level should only be used where non-essential data needs reading or writing to disk quickly. Before implementing RAID0, you should first strongly consider using one of the fault tolerant RAID levels such as [[RAID1]], [[RAID3]], or [[RAID5]].

@@ Line 1: / Line 1: @@
 RAID level 0, typically shortened to RAID0 and often referred to as disk striping, is a method by which two or more physical disks masquerade as one single larger disk.
 == Advantages ==
@@ Line 51: / Line 57: @@
 There is a working example of implementing RAID0 on FreeBSD documented in the article [[RAID0 (Setup)]].
 [[Category:FreeBSD Terminology]]
 [[Category:RAID]]

@@ Line 15: / Line 15: @@
 === Space ===
-Space is another advantage since all disks in the RAID can be utilized to store data.  For example three 500GiB drives in a RAID0 set will provide 1.5TB of storage.  This differs from other RAID levels that consume one disk in order to operate correctly.
+Space is another advantage since all disks in the RAID can be utilized to store data.  For example three 500GiB drives in a RAID0 set will provide 1.5TB of storage.  This differs from other RAID levels that consume one disk for parity in order to provide fault tolerance.
 === Cost ===

← Older revision		Revision as of 09:20, 9 November 2007
Line 47:		Line 47:

	The [http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/geom-striping.html FreeBSD Handbook] has details covering the GEOM RAID0 / Striping subsystem.		The [http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/geom-striping.html FreeBSD Handbook] has details covering the GEOM RAID0 / Striping subsystem.
		+
		+	== Guide ==
		+
		+	There is a working example of implementing RAID0 on FreeBSD documented in the article [[RAID0 (Setup)]].

	== Warning ==		== Warning ==

@@ Line 12: / Line 12: @@
 Theoretically the system can write files (in this example) four times faster using this method then it could to a single disk.
-'''''Note:''''' RAID level 0 is not restricted to four disks as in the above example, any number from two to the maximum the system will handle can produce a single RAID0 disk.
+'''''Note:''' RAID level 0 is not restricted to four disks as in the above example, any number from two to the maximum the system will handle can produce a single RAID0 disk.''
 === Space ===