From 325e7229b079ce8367df7a7571aad8bfc8e1e5a9 Mon Sep 17 00:00:00 2001 From: Frans Pop Date: Sat, 22 Aug 2009 15:52:14 +0000 Subject: Remove all untranslated documents for Danish --- da/using-d-i/modules/mdcfg.xml | 180 ----------------------------------------- 1 file changed, 180 deletions(-) delete mode 100644 da/using-d-i/modules/mdcfg.xml (limited to 'da/using-d-i/modules/mdcfg.xml') diff --git a/da/using-d-i/modules/mdcfg.xml b/da/using-d-i/modules/mdcfg.xml deleted file mode 100644 index bff80ee04..000000000 --- a/da/using-d-i/modules/mdcfg.xml +++ /dev/null @@ -1,180 +0,0 @@ - - - - - Configuring Multidisk Device (Software RAID) - - -If you have more than one harddrive - -To be honest, you can construct MD device even from partitions -residing on single physical drive, but that won't bring you anything -useful. - - in your computer, you can use -mdcfg to set up your drives for increased -performance and/or better reliability of your data. The result is -called Multidisk Device (or after its most -famous variant software RAID). - - - -MD is basically a bunch of partitions located on different disks and -combined together to form a logical device. This -device can then be used like an ordinary partition (i.e. in -partman you can format it, assign a mountpoint, -etc.). - - - -The benefit you gain depends on a type of a MD device you are -creating. Currently supported are: - - - - -RAID0 - -Is mainly aimed at performance. RAID0 splits all incomming data into -stripes and distributes them equally over each -disk in the array. This can increase the speed of read/write -operations, but when one of the disks fails, you will loose -everything (part of the information is still on -the healthy disk(s), the other part was on the -failed disk). - - - -The typical use for RAID0 is a partition for video editing. - - - - - -RAID1 - -Is suitable for setups where reliability is the first concern. It -consists of several (usualy two) equaly sized partitions where every -partition contains exactly the same data. This essentialy means three -things. First, if one of your disks fails, you still have the data -mirrored on the remaining disks. Second, you can use only a fraction -of the available capacity (more precisely, it is the size of the -smallest partition in the RAID). Third, file reads are load balanced among -the disks, which can improve performance on a server, such as a file -server, that tends to be loaded with more disk reads than writes. - - - -Optionally you can have a spare disk in the array which will take the -place of the failed disk in the case of failure. - - - - - -To sum it up: - - - - - - Type - Minimum Devices - Spare Device - Survives disk failure? - Available Space - - - - - - RAID0 - 2 - no - no - Size of the smallest partition multiplied by number of devices in RAID - - - - RAID1 - 2 - optional - yes - Size of the smallest partition in RAID - - - - - - -If you want to know the whole truth about Software RAID, have a look -at Software RAID HOWTO. - - - -To create an MD device, you need to have the desired partitions it -should consist of marked for use in a RAID. (This is done in -partman in the Partition -settings menu where you should select -Use as: Use the partition as a RAID -device .) - - - -Support for MD is a relatively new addition to the installer. -You may experience problems for some RAID levels and in combination -with some bootloaders if you try to use MD for the root -(/) filesystem. For experienced users, it may be -possible to work around some of these problems by executing some -configuration or installation steps manually from a shell. - - - -Next, you should choose Configure software -RAID from the main partman menu. -On the first screen of mdcfg simply select -Create MD device. You will be presented with -a list of supported types of MD devices, from which you should choose -one (e.g. RAID1). What follows depends on the type of MD you selected. - - - - - -RAID0 is simple — you will be issued with the list of available -RAID partitions and your only task is to select the partitions which -will form the MD. - - - - -RAID1 is a bit more tricky. First, you will be asked to enter the -number of active devices and the number of spare devices which will -form the MD. Next, you need to select from the list of available RAID -partitions those that will be active and then those that will be -spare. The count of selected partitions must be equal to the number -provided few seconds ago. Don't worry. If you make a mistake and -select a different number of partitions, the &d-i; won't let you -continue until you correct the issue. - - - - - - -It is perfectly possible to have several types of MD at once. For -example if you have three 200 GB hard drives dedicated to MD, each -containing two 100 GB partitions, you can combine first partitions on -all three disk into the RAID0 (fast 300 GB video editing partition) -and use the other three partitions (2 active and 1 spare) for RAID1 -(quite reliable 100 GB partition for /home). - - - -After you set up MD devices to your liking, you can -Finish mdcfg to return -back to the partman to create filesystems on your -new MD devices and assign them the usual attributes like mountpoints. - - - -- cgit v1.2.3