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Arena
SA-8850S
The Arena JanusRAID2 SA-8850S features an AMCC
PPC440SP CPU, dual U320 SCSI channels, twenty four SATA-II drive bays, and
fully modularized componentsand hot swappable power supplies and fans to
reduce the amount of operating downtime for maintenance. The JanusRAID2 series
supports RAID 6 to further increase data integrity and reliability.
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Host Interface:
U320 SCSI
Data Transfer Rate:
Up to 320MBps
ID Assignment:
0-127
Number of Host Channels:
2
External Connector Type: VHDCI
External Connector Type:
SCSI Daisy Chain
Controller CPU:
AMCC PPC440SP CPU
Cache Memory:
1G - Upgradeable to 4GB DDR II SDRAM
Disk Interface:
SATA-II (3 Gb/sec)
Number of Disk Channels:
24
Hot Swap Disk Tray:
3.5" hot-swappable tray
Hot Swap Fan:
4 x Turbo Fan
Hot Swap Power supplies:
350W, Redundant 2+1
AC Input Voltage:
100 to 240V (+/- 10%), 46 to 63 Hz
RAID Levels:
JBOD, 0, 1, 3, 5, 6, 10, 30, 50, 60, NRAID
Disk Groups: Max. 8
Logical Disk: 256
Data Rebuild:
Automatic Data Regeneration
RAID Features:
Global and local hotspare, Multiple Host ID, and Background
Initialization
Advanced Data Reliability
Assurance: SMARTCor. Functions (DST, DS, DC)
Online Expansion:
Yes
Front Panel LCD and Buttons:
Easy access for configuration and status
report.
RS-232 Terminal:
User Friendly interface for configuration and status
report
Web browser GUI:
Embedded CGI-based GUI management interface
Event Notification:
Built-in buzzer, e-mail, and SNMP
Management AP:
PathGuard, RAIDGuard Central, Windows MPIO, Windows VDS 1.1
Humidity:
20% to 80% non-condensing
Operating Temp:
5 °C to 40 °C
Non-Operating Temp:
-25 °C to 60 °C
Safety Regulatory:
UL, CUL, CB
EMC Standard:
FCC, CE, C-Tick, BSMI
Physical Dimensions:
485 (W) x 565 (D) x 174 (H) mm
Physical Weight:
34 Kgs (without drives)
Packed Dimensions:
635 (W) x 805 (D) x 565 (H) mm
Packed Weight:
44 Kgs (without drives)
Innovate New Array Structure
The JanusRAID2 series features a new innovate
array structure that hierarchically organizes storage objects. With this
structure, physical drives are combined into Disk Groups (DG). Disk Groups
are subdivided into Logical Disks (LD) where arrays are created. Lastly,
Logical Disk can be combined or stripped together to form Volumes. Either
volumes or LD can be pointed to a LUN which are then presented to the host
computer.
Online Expansion and Defragmentation of Disk
Groups
New physical disks can be added by expansion of
a Disk Group (DG) while the unit remains online. During the process of
expanding Disk Groups, defragmentation can be selected to move unused
capacity to the ending LBA of a Disk Group. Defragmentation can also be
selected at anytime there is unused storage space residing between Logical
Disks.
Online Expansion and Shrinking of Logical Disks
Logical Disk (LD) Online Expansion can increase
the capacity of an online LUN, instead of having to create a separate
partition for unused capacity or capacity gained from Disk Group Expansion;
now your storage can dynamically grow as your demands grow. In the event of
overestimating requirements for Logical Disk capacity, shrinking can be used
reduce the allocated storage of a Logical Disk.
The JanusRAID2 series now provides an Array
Recovery Utility (ARU) that can aid a user in the event of multiple drive
failures corrupting the RAID array of a Logical Disk and/or volumes. The ARU
enables users to recover lost disk members of a Disk Group, and will
automatically recover Logical Disks and Volumes.
Global or local spare disk
With the new JanusRAID2 storage structure, local
and global spares can be configured. Local spares will belong to specific
Disk Groups and will only replace faulty drives in a specific Disk Group.
Meanwhile, Global Spares will replace faulty disk in any available Disk
Group.
A simplified feature of Disk Scrubbing (DS),
Regenerate Parity will regenerate the parity of a Logical Disk(s) in a Disk
Group without a parity check.
Dual Flash ROM per controller gives higher RAID
system availability and reliability during firmware upgrading or in the
event of a single ROM failure.
Embedded CGI-based GUI (graphic user interface)
management interface can be accessed through a web browser. The GUI allows
users to easily setup RAID arrays, lun mapping, etc. and also provides
remote monitoring of drive health, fan, and power supplies.
RAID 6 improves over the industry standard RAID
5 by adding another parity disk which gives greater reliability and data
protection.
Before the release of this function, users of
RAID systems were forced to test suspected bad hard drives in a host
computer individually using a drive manufacturer’s utility. This function
tests the health of hard drives with them installed in the RAID unit. DST
performs write tests, servo analysis, and read scan tests; the test results
are then displayed on the LCD and hyper terminal output. This can aid the
user in deciding whether or not to replace a suspected failing hard drive.
We highly recommend running this test before initializing a RAID set to
ensure a healthy RAID solution.
With today’s RAID subsystems being capable of
storing multiple terabytes, it is becoming increasingly difficult to manage
and maintain that large amount of data. To aid a user in maintaining their
data’s health, Arena-MaxTronic has released their newest firmware function
Disk Scrubbing. The data and/or parity stored on hard drives can sometimes
become corrupted; this data can also reside in areas that are not accessed
for long periods of time. DS will use idle time to test the disks, and if a
sector is found to be corrupted, the data will be regenerated from other
RAID member disks and will be written to an uncorrupted sector. The purpose
of DS is to prevent the possibility of having multiple corrupted sectors in
a single stripe, which is one of the main causes of data loss.
Hard drives are the most likely component to
fail in a RAID array, and almost impossible to predict when the failure will
occur. When a failure does occur the RAID unit will have to regenerate data
from the non-failed hard drives to rebuild a new drive, and the RAID array
will be in degraded mode. Having a unit in degraded mode is a very cautious
time because if a second hard drive was to fail the RAID is destroyed and
data is lost. This is where Disk Cloning can aide a user. With the help of
the hard drives built in S.M.A.R.T. function, DC can determine when to begin
cloning a bad drive to a hot spare. Upon completion of cloning, the new
cloned disk can take the position of the failing disk or can stand-by until
the original disk fails, then take the failed disks position. Disk cloning
is to prevent a rebuild from ever occurring and having the unit in degraded
mode.
Support for greater than 2TB LUN
Two firmware options are available to surpass
the 2 terabyte limitation; 16byte CDB and variable sector size. With either
of these functions enabled, users are able to create slices and map LUNs
greater than 2TB to their respective host channels. See support
documentation for compatibility or contact technical support for more
information.
Background Initialization
Initialization occurs during creation of a RAID
array by zeroing out / formatting drives. By default the initialization
process occurs with the unit offline, and inaccessible. With background
initialization, the RAID array can be accessed during the initialization
process so that the unit can be setup without having to wait several hours
to complete initialization.
An optional BBU can be included in the RAID
system to ensure data integrity in the event of a power outage. The BBU, or
battery backup unit, will provide power to the on-board cache of the RAID
controller in the event of a power outage. This will allow any data that is
still stored on the cache to be saved until power is restored. Once power is
restored, the RAID controller will flush the cache to drives.
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