AccuDual ACS-75241 User manual

ACS-75241
User Guide v1.1

0
Contents:
Package Insides.......................................................................................................................................1
Specification............................................................................................................................................1
Over view ................................................................................................................................................2
Front view of ACS-75241 RAID box:....................................................................................................2
Rear view of RAID box:........................................................................................................................3
Front view of Power delay module:....................................................................................................3
RAID level 1 concept (Disk mirroring).....................................................................................................4
Installation of RAID box ..........................................................................................................................5
Configure the SCSI channel.................................................................................................................5
Mount or Remove hard drive .............................................................................................................6
Install ACS-75241 into system.................................................................................................................6
ACS-75241 power module connection ...................................................................................................7
Start using RAID box................................................................................................................................7
Application 1: Two new disk drives.....................................................................................................7
Application 2: Installing one hard drive with data and one new hard drive. .....................................7

1
Package Insides
ACS-75241 RAID Box x 1
Power-delay module x 1
Keys for disk carrier x 2
Power cord x 1
(for connecting RAID box and power-delay module)
Specification
AC power input 100V~240V
Net Weight: 0.5 Kg
Gross Weight: 1.0 Kg
Bare product Dimension:151 / 102 / 27 mm
Packing Dimension: 280 / 192 / 85 mm
Work temperature: Celsius 5 ~ 45 degrees

2
Over view
ACS-75241 is a reliable and affordable solution supporting traditional SCSI
interface for RAID 1 disk mirroring. The RAID box mirrors data to two hard
drives in RAID box simultaneously, and delivers optimized performance. And
featuring intelligent online recovery, the RAID box lets you hot swap a failed
hard drive and automatically rebuild the data to the new hard drive without
any system down time.
Front view of ACS-75241 RAID box:
The LED indicators that are built in right-side of drive tray for indicating hard
drive status. Please refer to below table for all status in details. When hearing
the beeper sounds “bi-bi-bi”, please check the indicator status and react to the
event immediately.
Status
indicator
(Green/Red)
Access
indicator
(Yellow)
RAID status
Green On
Off
Disk is installed properly
Green On
On/flashing
Disk is being accessing
Flash between
Red/Green
On/flashing
Disk is rebuilding
Red On
Off
Disk failure or no disk
installed

3
Rear view of ACS-75241 RAID box:

Connector for 50-pin
SCSI interface cable

DC Power input
connector

SCSI configuration DIP
switch group (bottom of
box)

3-pin RS232 connector
(Terminal port)
SCSI Interface:
Front view of Power delay module:
The Power-delay module is designed for eliminating damage from unstable
and critical power supply system, it can maintain the12V DC output up to 10
seconds even though unexpected input DC power dropped.

DC power Input connector

DC power output connector

4
RAID level 1 concept (Disk mirroring)
RAID is an acronym of Redundant Array of Independent/Inexpensive
Disks.RAID1 is one of several RAID levels. RAID 1 also known as “Disk
mirroring”. Data are written to both disks simultaneously. RAID1 provides both
high reliability and continued data availability in the event of failure of an array
member. When a RAID1 member disk fails, array management simply directs
all application requests to the remaining disk. RAID1 is suitable for data which
reliability requirements are extremely high, or for data to which high
performance access is required.

5
Installation of RAID box
Follow the instructions provided below to configure the system
interface setup depending on type of RAID box
Configure the SCSI channel
The Default SCSI configuration as shown on
the figure. The default SCSI ID is 6.
If you intend to configure the SCSI channel
to different ID number, please refer the
table. And leave others setting as default if
unnecessary.
*The ID 7 usually reserved for SCSI host
controller, please avoid using ID 7 for ACS-
75241 box for preventing the conflict.
ID
0
1
2
3
4
5
6
7
SW1
OFF
ON
OFF
ON
OFF
ON
OFF
ON
SW2
OFF
OFF
ON
ON
OFF
OFF
ON
ON
SW3
OFF
OFF
OFF
OFF
ON
ON
ON
ON

6
Mount or Remove hard drive
Install ACS-75241 into system
1. Follow the following instructions to establish the connection.
2. After fully configured RAID box.
3. Power down your host computer.
4. Mount the RAID box into the system.
5. Connecting the SCSI cable from system computer to RAID box.
6. Connecting DC power from system power output to the DC
7. power input connector of power-delay module.
8. Connecting power cable that attached with package from end of DC
9. power output of power-delay module to RAID box.
10.(Please refer to below figure for instruction 5 and 6.)
11.After completing the above steps. Refer to next section for Starting
12.using the RIAD box.
1. Slide hard drive into the disk tray firmly.
2. Mount the disk by screws from bottom of
tray.

7
ACS-75241 power module connection
Start using RAID box
Application 1: Two new disk drives.
Insert both hard drives into the RAID box.
Power on the host computer.
After system boot up, the RAID box will be recognized by host system.
And system treats it as a single disk.
Partition and format the array under OS before it can be used.
Application 2: Installing one hard drive with
data and one new hard drive.
The new hard drive must be the same capacity or larger capacity than the hard
drive with data.
Insert hard disk with data into the top slot and leave bottom Slot empty. This
identifies the disk with data as the source drive. (The host computer must be in
power-off status.)
Power on the host computer.

8
Insert the new hard drive into bottom slot. This identifies the newly inserted
hard drive as a target disk.
The RAID box will immediately begin mirroring the data from the source hard
drive to the new hard drive in bottom slot. Any old data on the newly inserted
hard drive will be lost, and is overwritten with the mirror image of the source
drive.
Note
If you have installed non-identical hard drives, your computer will
recognize RAID box as a single hard disk with a capacity equal to the
smaller hard disk drive installed in the RAID box.