Various RAID Level
Support
RAID levels 1, 3, 5, and 6 to provide redundancy in the event of a
failed drive, and sustained read performance even in degraded mode. On
some of the products there even have feature which allows 3 disks
failure.
On-line Array Roaming
Array
member disks have recorded specific identifications, so when a RAID
system or controller becomes faulty, this function provides an easy way
to get the data back online by just moving the member disks to a same
model working RAID system.
SMARTCor. Functions
SMARTCor. is embedded F/W feature which include 3 functions mainly for disks bad sectors monitoring and correction.
- DST (Disk Self Test) DST is used to test the
health situation of disks which installed in the RAID system. Prior to
DST a user would have to remove disks individually and run a vendor
proprietary disk utility in a separate host computer. DST predicts the
likelihood of near-term HDD degradation of fault condition in advance.
DST performs write test, servo analysis and read scan test on the disks.
- DS (Disk Scrubbing) DS can scan for bad sectors
and/or parity errors in a RAID array. Allows the RAID controller to
reconstruct bad sectors from other sectors and re-assign it to an
undamaged area. At the same time it also detects parity inconsistency;
users can decide whether or not to overwrite inconsistent parity. DS is a
proactive approach to address data integrity; to maintain the RAID
system in a good condition.
- DC (Disk Clone) This function automatically copy
data to spare disk before the faltering disk identified as failed by
RAID system. It could be configured to trigger by the following
conditions:
Over bad block threshold of disk.
Detect SMART
warning from disk. DC helps to prevent a rebuild from ever occurring
while disk failures which cause the unit in degraded mode.
LUN Masking
LUN
(Logical Unit Number) Masking is an authorization process that makes a
LUN available to some hosts and unavailable to other hosts. LUN Masking
is implemented primarily at the HBA level. LUN Masking implemented at
this level is vulnerable to any attack that compromises the HBA. LUN
Masking support by storage is important because Windows based servers
attempt to write volume labels to all available LUN's. This can render
the LUN's unusable by other operation systems and can result in data
loss.
Snapshot
The
snapshot is done by embedded F/W, without the needs to install any
application on the server. The array based, block level snapshot
function would leverage the computing power of the RAID system; it is
host-independent, and application-independent. The shot data could be
restored by using snapshot restore function. With the snapshot a data
image can be rolled back to a previous snapshot immediately, help user
to resume applications without waiting for data restore from backup
media.
Remote Replication
Remote
Replication deploys snapshot technology with full data copies through
volume mirror/copy. The target volume created through volume mirror can
be constantly synced with source volume. When a data volume fatally
fails, the copy constantly synced can be rolled back for quick recovery.
These functions are ideal for applications needed immediately data
availability.
MaxSure
Embedded F/W feature to support SED Self-Encrypting Drive,
the drives are embedded with encryption ASIC and encryption key, to
encrypt/decrypt data write/read to the drives automatically. The MaxSure
include 2 functions:
Instant Secure Erase
Authentication Key Management
The MaxSure integrated with SED would prevent unauthorized access while drives are retired, stolen, return for warranty or repurposed.
Symmetric Active-Active Redundancy
The
Nova series implement Symmetric active-active controller redundancy
mechanism ease management of the IT environment and improve efficiency.
Help to simplify configuration on VMware clustered environments by
eliminating the need to select a preferred path. There is no additional
path management utility needed to manage multiple paths and load balance
for operating systems already embedded MPIO.
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