Cyclone 3.5 USB 2.0 / eSATA Dual Bay RAID External Hard Drive Instructional Manual

Connection to the Computer
1. Plug the power supply into an AC outlet and connect the power cable to the drive
2. Decide which interface cable you will use:
A. eSATA Connection:
Connect the eSATA cable to your computer and to ACDUES350F.
B. USB 2.0 Connection:
Connect the USB 2.0 cable to your computer and to ACDUES350F..
NOTE:
If both a USB and an eSATA cable are connected, the USB connection will remain active and the eSATA connection will be disabled.
3. Turn on the drive by moving the power switch on the back to the ON position.
4.Push the reset button to reset the setting of HDDs.
5.The device will restart automatically and OS will recognize the HDDs
6.Refer to “Partitioning & Formatting” chapter to format the disks
The ACDUES350F is pre-congured in SPAN/BIG mode. If you would like to change the RAID mode, please see the RAID Setting & Configuration section (pg.13)

After resetting the jumper or installing the HDDs, please press this button to activate the new setting To configure the RAID setting via GUI, please download the SteelVine Manager from Silicon Image’s website and search for SiI5744 NOTE: Changing the RAID steup will require you to re-format the drives. Make sure you backup all data before doing so! The ACDUES350F storage processor has two hard disk LEDs (SATA Port to hard
disk). The table shows hard disk LEDs functions and operation in Normal mode. The ACDUES350F storage processor has two hard disk LEDs (SATA Port to device). The table shows hard disk LED function and operation in SPAN(BIG), RAID 0 (FAST), RAID 1 (SAFE), SAFE33, SAFE50 modes. These LEDs behave as follows: The BIG storage policy concatenates a series of physical hard drives as a single large volume;resulting in a seamless expansion of virtual volumes beyond the physical limitations of singularly connected hard drives. ACDUES350F BIG storage policy delivers maximum storage space without a single large capacity and costly hard drive. Hard drive A and B are concatenated into a single virtual volume in the Figure below with a storage capacity that is equal to the sum of each of the physical hard drives A and B.

It is also possible to create a BIG volume using only a single hard disk drive connected to Port 0, and then increase the storage capacity of the volume later by adding another hard disk drive to Port 1 and pressing the Mode Change push-button. The new disk blocks of Port 1 will be concatenated to the end of the disk blocks of Port 0, and any data that is stored on the existing BIG volume will be preserved. However, it is not possible to expand an existing BIG volume by adding another hard disk drive to Port 0 and still preserve any existing data on that volume. The Normal storage policy enables each hard drive to be seen separately as one drive. When using a SATA host controller, Normal should only be used if the SATA host controller provides Port Multiplier (PM) support. If a host is not PM-aware, only a single drive is presented (drive 0). No such limitation if using a USB host connection.

The FAST storage policy distributes access across all hard disks, also called striping (equivalent to RAID 0). FAST presents the best data speed but no data redundancy. FAST storage policy accelerates hard disk operating speed by using many disks in parallel. Hard drive data segments are written to dierent disks simultaneously which increases performance while sacrificing data redundancy. To implement the FAST storage policy, the ACDUES350F Storage Processor creates a single virtual volume that is striped across both hard drives, with a storage capacity that is equal to the sum of both hard disk drives. The SAFE storage policy stores all data in duplicate on separate drives to protect against data loss due to drive failure. One drive mirrors the other at all times, equivalent to RAID 1. Every write operation goes to both drives. SAFE provides the highest level of data protection for critical data that you cannot afford to lose if a hard drive fails, but halves the amount of storage capacity because all data must be stored twice. The resulting storage capacity of the virtual SAFE volume will be equivalent to the size of one hard drive (if both drives are the same) or the smaller of the two drives (if they are different). If one drive fails, the SAFE volume is still usable, but it is in a vulnerable state because its mirrored hard drive is inaccessible. When the other drive comes back online, the appliance begins a rebuild process immediately to restore data redundancy. Although the volume remains available during the rebuilding process, the volume is susceptible to data loss through damage to the remaining drive until redundancy is restored at the end of the rebuilding and verification process. Host access takes precedence over the rebuilding process. If you continue to use the SAFE volume during the rebuild, the rebuild process will take a longer time to complete, and the host data transfer performance will also be affected. It is also possible to create a SAFE volume using one hard disk drive connected
to Port 0 of the ACDUES350F Storage, although no mirroring will occur until a second hard disk drive is connected to Port 1. With only one hard disk drive connected, the SAFE volume will be available, although no data protection will be provided until a second hard disk drive is connected.

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June 30, 2010 | Posted in Portable Storage

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