Dell DR2000v DR Series System Administrator Guide - Page 25

DR Series Expansion Shelf, Dell DR Series System Interoperability, Guide

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external expansion shelf enclosures (see the DR Series Expansion Shelf section in this topic). The hot-swappable data drives that are attached to the RAID controller are configured as: • 11 drives that operate as RAID 6, which act as virtual-disks for data storage (drives 1-11). • The remaining drive (drive 0) acts as the global hot-spare drive for RAID 6 for the system for the DR4000, DR4100 and DR6000 and a dedicated hot spare for the DR4300e, DR4300, and DR6300. The DR Series system supports RAID 6, which allows the appliance to continue read and write requests to the RAID array virtual disks even in the event of up to two concurrent disk failures, providing protection to your mission-critical data. In this way, the system design supports double-data drive failure survivability. If the system detects that one of the 11 virtual drives has failed, then the dedicated hot spare (drive slot 0) becomes an active member of the RAID group. Data is then automatically copied to the hot spare as it acts as the replacement for the failed drive. The dedicated hot spare remains inactive until it is called upon to replace a failed drive. This scenario is usually encountered when a faulty data drive is replaced. The hot spare can act as replacement for both internal mirrored drives and the RAID 6 drive arrays. Figure 1. DR Series System Drive Slot Locations Drive 0 (top) Drive 1 (middle) Drive 2 (bottom) Drive 3 (top) Drive 4 (middle) Drive 5 (bottom) Drive 6 (top) Drive 7 (middle) Drive 8 (bottom) Drive 9 (top) Drive 10 (middle) Drive 11 (bottom) DR Series Expansion Shelf The DR Series hardware system appliance supports the installation and connection of Dell PowerVault MD1200 (for DR4000, DR4100, and DR6000) and Dell PowerVault MD1400 (for DR4300e, DR4300, and DR6300 systems) data storage expansion shelf enclosures. Each expansion shelf contains 12 physical disks in an enclosure, which provides additional data storage capacity for the basic DR Series system. The supported data storage expansion shelves can be added in a variety of capacities based on your DR Series system version; for details, see the Dell DR Series System Interoperability Guide. The physical disks in each expansion shelf are required to be Dell-certified Serial Attached SCSI (SAS) drives, and the physical drives in the expansion shelf uses slots 1-11 configured as RAID 6, with slot 0 being a global hot spare (GHS). When being configured, the first expansion shelf is identified as Enclosure 1 (in the case where two enclosures are added, these would be Enclosure 1 and Enclosure 2). Adding an expansion shelf to support the DR Series system requires a license. For more information, see the topic, "Expansion Shelf Licenses." NOTE: The 300 Gigabyte (GB) drive capacity (2.7 TB) version of the DR Series system does not support the addition of expansion shelf enclosures. 25

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external expansion shelf enclosures (see the
DR Series Expansion Shelf
section in this topic). The hot-swappable data
drives that are attached to the RAID controller are configured as:
•
11 drives that operate as RAID 6, which act as virtual-disks for data storage (drives 1–11).
•
The remaining drive (drive 0) acts as the global hot-spare drive for RAID 6 for the system for the DR4000, DR4100 and
DR6000 and a dedicated hot spare for the DR4300e, DR4300, and DR6300.
The DR Series system supports RAID 6, which allows the appliance to continue read and write requests to the RAID
array virtual disks even in the event of up to two concurrent disk failures, providing protection to your mission-critical
data. In this way, the system design supports double-data drive failure survivability.
If the system detects that one of the 11 virtual drives has failed, then the dedicated hot spare (drive slot 0) becomes an
active member of the RAID group. Data is then automatically copied to the hot spare as it acts as the replacement for
the failed drive. The dedicated hot spare remains inactive until it is called upon to replace a failed drive. This scenario is
usually encountered when a faulty data drive is replaced. The hot spare can act as replacement for both internal
mirrored drives and the RAID 6 drive arrays.
Figure 1. DR Series System Drive Slot Locations
Drive 0 (top)
Drive 3 (top)
Drive 6 (top)
Drive 9 (top)
Drive 1 (middle)
Drive 4 (middle)
Drive 7 (middle)
Drive 10 (middle)
Drive 2 (bottom)
Drive 5 (bottom)
Drive 8 (bottom)
Drive 11 (bottom)
DR Series Expansion Shelf
The DR Series hardware system appliance supports the installation and connection of Dell PowerVault MD1200 (for
DR4000, DR4100, and DR6000) and Dell PowerVault MD1400 (for DR4300e, DR4300, and DR6300 systems) data storage
expansion shelf enclosures. Each expansion shelf contains 12 physical disks in an enclosure, which provides additional
data storage capacity for the basic DR Series system. The supported data storage expansion shelves can be added in a
variety of capacities based on your DR Series system version; for details, see the
Dell DR Series System Interoperability
Guide
.
The physical disks in each expansion shelf are required to be Dell-certified Serial Attached SCSI (SAS) drives, and the
physical drives in the expansion shelf uses slots 1–11 configured as RAID 6, with slot 0 being a global hot spare (GHS).
When being configured, the first expansion shelf is identified as Enclosure 1 (in the case where two enclosures are
added, these would be Enclosure 1 and Enclosure 2). Adding an expansion shelf to support the DR Series system
requires a license. For more information, see the topic, “Expansion Shelf Licenses.”
NOTE:
The 300 Gigabyte (GB) drive capacity (2.7 TB) version of the DR Series system does not support the addition
of expansion shelf enclosures.
25