Users Guide

NOTE: On software RAID S110 and S130 controllers, if a physical disk (SATA SSD or HDD) is removed from a virtual disk and the

same physical disk is reinserted (hot plug) into the virtual disk instantly, within a fraction of a second, then the virtual disk state

is displayed as Ready and the physical disk state is displayed as Online. However, if the same physical disk is reinserted after a

short delay, then the virtual disk state is displayed as Degraded and the physical disk state is displayed as Ready.

NOTE: On software RAID controllers, virtual disks can be created only with SATA drives.

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Number Of Physical Disks Per Virtual Disk

Virtual Disk Considerations On Systems Running Linux

On some versions of the Linux operating system, the virtual disk size is limited to 1TB. Before creating a virtual disk that is larger than 1TB,

you should make sure that your operating system supports this virtual disk size. The support provided by your operating system depends on

the version of the operating system and any updates or modications that you have implemented. In addition, you should investigate the

capacity of your peripheral devices to support a virtual disk that is larger than 1TB. For more information, see your operating system and

device documentation.

Number Of Physical Disks Per Virtual Disk

There are limitations on the number of physical disks that can be included in the virtual disk. These limitations depend on the controller.

When creating a virtual disk, the controllers support some stripes and spans (methods for combining the storage on physical disks). Since,

the number of total stripes and spans is limited, the number of physical disks that can be used is also limited. The limitations on stripes and

spans aect the possibilities for concatenation and RAID levels as follows:

• Maximum number of spans aects RAID 10, RAID 50, and RAID 60.

• Maximum number of stripes aects RAID 0, RAID 5, RAID 50, RAID 6, and RAID 60.

• Number of physical disks in a mirror is always 2. This property aects RAID 1 and RAID 10.

If RAID 50 and RAID 60, you can use a greater number of physical disks than is possible for other RAID levels. RAID 10 on a SAS controller

with rmware version 6.1 can use a maximum of 256 physical disks. However, the number of connectors on the controller imposes

limitations on how many physical disks can be included in a virtual disk when using RAID 10, RAID 50, or RAID 60. This is because only a

limited number of physical disks can be physically attached to the controller.

For information about the maximum number of physical disks supported by a virtual disk, see the virtual disk specications for the

controller in Supported Features.