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Visual LVM, from 0 to ∞ (13) - Create LV : stripe/RAID 0
Section 4 : The Logical Volume operations
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Section 4.1.2 Create Logical Volume - Stripe/RAID 0
Stripe/RAID 0 is one of the standard types of RAID. It consists of two or more storage sections of the same size present in the host device (that is, the Physical Volume). Each section is divided into a plurality of strips of the same size. The data of the Stripe volume is sequentially stored in each stripe. Because the Stripe type can access multiple devices at the same time, the theoretical maximum performance is the device performance * number of devices. And there is no verification mechanism for Stripe type, so its security is no higher than a single device volume.
The sequence of data is A1 A2 A3 A4 A5 A6...
To create stripe volume, you need to select at least two Physical Volumes which belongs to the same Volume Group, the selected Physical Volume will be remove when you select a Physical Volume in other Volume Group. The stripe format bar will be enabled after 2+ Physical Volume selected.
select at least 2 Physical Volumes for create stripe volume
We have already mentioned the rules of parameters in the previous section, so we will not elaborate on them here, except volume size.
As we said earlier, a Stripe volume is made up of the same size of storage sections divided among multiple host devices, so the same size must be set for each section when creating a Stripe volume.
When the user sets the volume size by mouse dragging, the available space on other selected physical volumes will automatically change following the user's motion. When the all available space of a physical volume has been used up, and the other physical volume is dragged at this time, the size of the volume will not continue to increase. Again, these restrictions apply when entering the volume size.
The restriction of volume size setting
And you can press Advance... button to change default settings of Logical Volume.
Usually user need not to change the default advance settings of Logical Volume.
The advanced setting of the stripe type adds the Stripe Size setting to the simple type:
Stripe size : To determine the size of stripe, the storage section will be divided by the value.
Advanced settings of Logical Volume
When all settings finished, press Done button on creating Logical Volume wizard to perform operation.
After operation finished, Visual LVM shows follow dialog to inform user that Logical Volume has been created.
Logical Volume created
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