MSA 2060 Storage Array

QuickSpecs
HPE MSA 2060 Storage Array
Standard Features
Page
7
RAID 0, 1, 5, 6, 10, MSA-DP+
The MSA 2060 features several important additional RAID levels. MSA-DP+ offers improved performance, availability, and very
fast rebuild times compared to traditional parity RAID by utilizing erasure coding technology. MSA-
DP+ includes distributed spare
capacity (default is equal to 2x the largest drive), and does not use traditional spare drives. RAID 6 allocates two sets of parity
data across drives and allows simultaneous write operations. It can withstand two simultaneous drive failures without downtime or
data loss. RAID 10 is mirroring and striping without parity and allows large Disk Groups to be created with high performance and
mirroring for fault tolerance. RAID 5 combines the block striping and parity. Because data and parity are striped across all of the
disks, no single disk is a bottleneck. Striping also allows users to reconstruct data in case of a disk failure. RAID 0 (Striping) is
supported for Read Cache only.
MSA-DP+
MSA-DP+ is a new RAID-based data protection level introduced with the 6
th
Generation MSA Storage Systems that:
• Maximizes flexibility
• Provides built-in spare capacity
• Optimizes performance due to the elimination of idle spares
• Allows for very fast rebuilds, large storage pools, and simplified expansion
If a disk fails in an MSA-DP+ disk group, and the failed disk is replaced with a new disk in the same slot, the replacement disk will
be added to the disk group automatically. All disks in an MSA-DP+ disk group must be the same type (enterprise SAS, for
example), but can have different capacities, provided the range of difference does not exceed a factor of two. For example, mixing
a 600GB disk and a 1.2TB disk is acceptable; but mixing a 6TB disk and a 16TB disk is not recommended. It is conceivable that a
sizeable difference between mixed disk capacities (ratio greater than two) could prevent consuming space on disks due to
insufficient distributed space required to support striping.
All disks in an MSA-DP+ disk group are used to hold user data, but not all disks will be used by each page of data. To increase
fault tolerance, any available capacity on disks can be allocated as spare for reconstruction purposes. When new data is added,
new disks are added, or the system recognizes that data is not distributed across disks in a balanced way, the system moves the
data to maintain balance across the disk group. Spare drives are not used by MSA-DP+ disk groups since the RAID design
provides built-in spare capacity that is spread across all disks in the disk group. In the case of a disk failure, data will be
redistributed to many disks in the disk group, allowing for quick rebuilds and minimal disruption to I/O. The system will
automatically default to a target spare capacity that is the sum of the largest two disks in the MSA-DP+ disk group, which is large
enough to fully recover fault tolerance after loss of any two disks in the disk group. The actual spare capacity value can change
depending on the current available spare capacity in the disk group. Spare capacity is determined by the system as disks are
added to a disk group, or when disk groups are created, expanded or rebalanced.
Notes:
- HPE recommends not mixing disks if the ratio of the largest disk to the smallest disk is greater than two.
-
For more information on MSA-DP+, refer to the HPE MSA 1060/2060/2062 Storage Management Guide.
Configuration and Management Tools
• Management access, out-of-band, Storage Management Utility (SMU) V4, CLI.
• Interface Types: USB 100/1000 Ethernet.
• Protocols Supported SNMP, SMI-S, SSH, SMTP, FTP, SFTP, HTTP, HTTPS, Telnet