User's Manual

physical disk is rebuilding in one RAID 6 set do not lead to data loss. RAID 60 has improved fault

tolerance because more than two physical disks on either span must fail for data loss to occur.

Minimum Disk Requirement for Different RAID Levels

Table 4. : RAID Level and Number of Disks

RAID Level Minimum Number of Disks

0 1*

1 2

5 3

6 4

10 4

50 6

60 8

* For S110 RAID controller, a minimum of two hard disk drives are required.

Selecting Physical Disks

Use the Select Physical Disks screen to select the physical disks to be used for the virtual drive and select

the physical disk drive-related properties.

The number of physical disks required for the virtual disk varies depending on the RAID level. The

minimum and maximum numbers of physical disks required for the RAID level are displayed on the

screen.

• Protocol — Select the protocol for the disk pool: Serial Attached SCSI (SAS) or Serial ATA (SATA). SAS

drives are used for high performance, while SATA drives provide a more cost-effective solution. A disk

pool is a logical grouping of physical disk drives on which one or more virtual drives can be created.

The protocol is the type of technology used to implement RAID.

• Media Type — Select the media type for the disk pool: Hard Disk Drives (HDD) or Solid State Disks

(SSD). HDDs use traditional rotational magnetic media for data storage and SSDs implement flash

memory for data storage.

• Encryption Capability — Select Yes to enable encryption capability

• Select Span Length — Select the span length. The span length value refers to the number of physical

disk drives included in each span. Span length applies only to RAID 10, RAID 50, and RAID 60. The

Select Span Length drop‑down list is active only if the user has selected RAID-10, RAID-50, or RAID

60.

• Drives remaining for current span — Displays the number of physical disk drives available based on

the span length value.

• Select the physical disk drives using the check boxes at the bottom of the screen. The physical disk

drive selection must meet the requirements of the RAID level and span length. To select all the

physical disk drives, click Select All. After you select the option, the option changes to Deselect.

Setting Virtual Disk Attributes

Use this page to specify the values for the following virtual drive attributes:

• Size — Specify the size of the virtual drive.

• Stripe Element Size — Select the stripe element size. The stripe element size is the amount of drive

space a stripe consumes on each physical disk drive in the stripe. The Stripe Element Size list may