Currentely, Buffalo CS provide crash recovery HDD Image sloution .
CS can provide HDD disk image and HDD image tools for recovery. Please contact buffalo Customer Support for details.
APPENDIX A1 : CS Global Team WEB PAGE.
Page 33
RAID-0 uses all drives as a single array of storage. All drives are seen as one-massive drive. The capacity of the drive is the combined capacity of all drives in the array.
RAID 0 uses a method of writing to the disks called striping which distributes the data across all drives.
The disadvantage to RAID-0 is that it offers no fault-tolerance. If one hard drive in the array fails, then the data in the entire RAID array is compromised. The fact that there are multiple drives in a RAID-0 array increases the opportunity for a hard drive failure. Since a single hard drive failure makes all of the data in the array unusable, RAID-0 is significantly more prone to data loss than a single drive configuration.
RAID-0 should be used in cases where maximum capacity is required but data redundancy is not a requirement.
RAID-1: Mirroring (with Redundancy)
RAID-1 provides fault tolerance but also decreases overall capacity. RAID-1 is often referred to as disk mirroring. In a RAID-1 array, the system will save the data to all hard drives in the array simultaneously. In the case of a drive failure, the healthy drive will assume the role of the main drive and the data is accessible without interruption. Once the faulty drive is replaced, the RAID array will be restored to its original condition. RAID-1 is ideal in two-drive configurations seeking redundancy in lieu of capacity.
RAID-1 is the Buffalo recommended configuration for all devices with 2 hard drives.
Page 34
Area filled in with red represents parity/redundant information.
RAID-5:(with Redundancy)
RAID-5 requires at least 3 physical drives. Data is split into blocks and stored over all of the drives. Parity data is distributed amongst all of the drives and is used to regenerate lost data during a drive failure. In case of a drive failure, RAID-5 will be able to regenerate the missing data from the parity data remaining on the healthy drives. This regeneration occurs automatically and on-the-fly, meaning a user still has immediate access to their data after a single drive failure.
RAID-5 is ideal in configurations with three or more drives seeking a combination of increased capacity and redundancy.
RAID-5 is the Buffalo recommended configuration for all devices with 3 or more drives.
Area filled in with red represents parity/redundant information.
RAID6
Page 35
RAID 6 based on same technology as raid RAID 5, except it allows for 2/X frailer as opposed 1/X . When 2 hard disks in the RAID array break down, it is possible to salvage the data with changing the hard disk.
RAID 60 consists of multiple RAID 6 arrays that are striped (as with RAID 0).
Capacity [ (The number of hard disks ÷2)-2×2].
RAID61 consists of RAID 6 paired arrays that are mirrored (as with RAID 1).
Capacity [ The number of hard disk ÷2－2].
RAID 50 consists of multiple RAID 5 arrays that are striped (as with RAID 0).
Capacity [(The number of hard disk÷2－1)×2].
RAID51 consists of multiple RAID 5 paired arrays that are mirrored (as with RAID 1).
The capacity available is [The number of hard disk÷2－1].
RAID 10 consists to multiple RAID 1 arrays that are striped (as with RAID 0).
RAID 01 consists of RAID 0 paired arrays that are mirrored (as with RAID 1)
Page 36
TeraStation RAID Configuration
1. Log onto the Terastation.
the login prompt will appear, enter admin for the user name.
Until you change it, the password for the admin account will be password. Press the OK button when finished.
User name: admin Password: password
2. Click on Disk Management then RAID Configuration, configure the desired RAID setup. This page shows your current RAID arrays.
You may delete old arrays or create new ones by clicking on the underlined RAID Array # under RAID Array Configuration. You may also disable RAID Array Error Detection Response from this page.
Normally, this is set to automatically shut down the RAID array when an error is detected. Though it is not recommended, you may disable that behavior by clicking Disable and then Apply under RAID Array Error Detection Response.
Note that your TeraStation has four internal hard drives. Before creating a new RAID array, you may have to delete one or more pre-existing RAID Arrays to clear up the hard drives for your new one. This will destroy all data currently on the disks, so back up any important data before deleting RAID arrays. Whether you want to clear out an old array or create a new one, begin by clicking on the array underlined RAID Array #, under Name.
TeraStation uses RAID (Redundant Array of Independent Disks) technology to control the fourhard drives in your TeraStation.
RAID may be configured several ways:
RAID Spanning - All four drives are striped into one large drive, giving the maximum capacity for your TeraStation.
RAID 1 (mirroring) - Hard drives (or spanned pairs of hard drives) are arranged in mirrored pairs. Each half of the pair reads and writes exactly the same data.
RAID 5 (parity) - All drives in a RAID 5 array reserve part of their data space for parity information, allowing all data to be recovered if a single drive fails.
Buffalo Technology recommends RAID 5 for its excellent balance of efficiency and security.
3. A configured RAID array may be deleted by pushing the Delete RAID Array button. This will free up all hard drives listed under Disk Structure.
4. To configure an unconfigured array, put checks next to the hard disks you want included in the array (under Disk Structure) and choose your RAID mode. Click Setup RAID Array when ready. It may take several minutes to complete setting up the RAID array. When it is finished, a Disk Check will run.
5. When RAID Configuration is done, you'll see this screen.
To configure a new array, click on RAID Array # and go back to step 2.
Page 37
APPENDIX A2 :
The
✓symbol indicates supported RAID mode. The symbol
✓*indicates default
RAID mode for that model
.Page 38
APPENDIX B:
Starting with TeraStation TS5000 series, there is a built-in support feature to create emergency configuration and boot up image backup on a USB memory device. This would allow a simple recovery mechanism in event of system crash.
To Backup system configuration and create boot up USB image (or restore a configuration):
1- Launch browser to TeraStation WEB UI and log-in.
2- click [Management]
3- Click next to [Restore/Erase].
4- Disconnect any attached USB device and insert the backup USB flash memory device in USB 2.0 Port (pay attention there are 2 different USB ports 2.0 and 3.0).
5- From [Target USB drive], select the USB memory device that is connected to the USB 2.0 port of the TeraStation.
Page 39
Recommended, select [Create special USB drive for password recovery] and then click [Execute].
[Save setting to USB drive] to save current configuration and write boot up image to the USB drive.
[Transfer settings from USB drive] to restore configuration from the USB drive.
[Create USB drive to initialize settings] to save default factory configuration and write boot up image to the USB drive.
[Create special USB drive for password recovery] to save current configuration with exception to administrator password and write boot up image to the USB drive. Administrator account is reset to factory default (i.e. Admin/password).
To restore a previously saved configuration, select [Transfer settings from USB drive]
and then click [Execute].