Question about GTech G-TECH 907205-01 G RAID 2 500GB FW400/800USB STORAGE Network Storage

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Switching from 'Mirrored' to 'Striping'?

Hi.. We have currently upgraded our back up to a G RAID 2. I understand i need to switch it over so it 'strips' instead of 'mirrors' the files.

Please can anyone help me as how to do this??!!!
Thanks!

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I don't understand your description. sorry. But if you are switching over from Mirror to stripping then you will surely loose your files. Switching raid configuration will also redo the hard drive relativity and will reformat the drives automatically. If your backup is a server then you need to go to system bios and configure the raid from there. I suggest backup the backups first before you do it. If your backup is an external hard drive then go to its http settings and configure it there. It will surely format your drive.

Posted on Dec 11, 2008

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Posted on Jan 02, 2017

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CISCO 6248 beep sound


Beep Codes Cause (Depending on RAID Level)

3 seconds on, 1 second off

  • RAID 0: One or more drives offline.
  • RAID 1: Two drives offline.
  • RAID 5: Two or more drives offline.
  • RAID 6: More than two drives offline


1 second on, 1 second off

  • RAID 1: A mirrored drive failed.
  • RAID 5: One drive failed.
  • RAID 6: One or two drives failed.

1 second on, 3 seconds off

A hot spare drive has completed the rebuild process and has been brought into the array.

Jul 24, 2014 | Cisco UCS 6248UP 48-Port Fabric...

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FAIL-SAFE FILE SERVER AND COMPUTER SYSTEMS If your data is very important, you...


FAIL-SAFE FILE SERVER AND COMPUTER SYSTEMS

If your data is very important, you should consider doing regular data backups because hard disk will fail at some at some stage in the future. This is especially true when you get an error message"hard drive is about to fail".

Depending upon how critical your computer or files server to you or your business, you should consider building a fail-safe computer or file server system using RAID technology. RAID means "A Redundant Array of Inexpensive Disks" and there are several levels of RAID.

For details of different RAID levels - click on this link -
http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci214332,00.html

The most common of the fault redundant RAID systems are -

RAID 0 + RAID 1 provides fastest data transfer Mirrored hard drives.

RAID 5 is one of the most popular system, it data striping across hard drives with error correction. It has excellent performance with fail-safe system and allows for hot swappable hard drives.

There should be redundant powers supply inside the computer or file server in the event of a power supply failing.
Another consideration is to install a UPS (uninterruptible power supply) to prevent a computer or server shut down from power outages, as this will corrupt your data.

These systems do not mean you should not back up your data on a regular basis.

on Oct 20, 2010 | Computers & Internet

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Implementing RAID 1 in Windows Server 2003 using VMware!


This is a simple tutorial about creating a RAID 1 in VMware for IT people. VMware, well I think you know already about Server Virtualization.Its a well known product.
Let's discuss about some of the techniques related to Load Balancing or Fault Tolerance.....The Disks here used are Dynamic Disks.
RAID - Reduddant Array of Independant (Not much Inexpensive these days. That term suites no more) Disks. There are two types of RAID:
  1. Software RAID - Implemented via the OS or with the help of a Software. Not much efficient however.
  2. Hardware RAID - Hardware level RAID. Much more efficient and Fault Tolerant.

The idea to use a set of disks or an array is to increase the performance (Load balancing) and provide Disaster Recovery (Folt Tollerant).
RAID 0 - StripingThe fastes of all the RAID configurations. This is known as Striping. Striping is the process of Writing data Sequentially to or Read from more than a single Hard Drive (or a Storage Device).First the data is broken up into chunks or blocks. Then the writing process will be accomplished. The process of writing will be done Simultaneosly onto Strips. The performance of reading and writing increases because all the Heads are working all the time
RAID 1 - Mirroring,DuplexingAs the name implies, it creates a Mirror of one Disk onto another. Data will be written to Both the Disks. So if one disk fails other one can be mounted or it can be used to Restore data.There can be a deadlock how ever. The Disk Controller. RAID 1 uses a Single Disk Controller thus a Single point of failure.We can avoid this easilly with the use of Disk Duplexing which means usage of 2 Disk Controllers.
RAID 2 - Striping with ParityThis is similar to RAID1 but with an added feature known as Parity. One disk - typically the last one - is used to store somethings called Parity bits. With the use of these Parity Bits, the lost data can be easilly generated. This uses Logical XOR Operation. When writing, it XORs every data written onto HDDs and stores in the Parity Disk. When one Disk fails, thet PD is XORed with other Data bits on the functioning Hard Drives. This is a very effective technology in terms of Fault Tolerance. But Performance is pretty low.
RAID 3Similar to RAID 2 but instead of using Strips which are in Bits this technique uses Strips in Bytes. That increases the performance over RAID2.
RAID 4Strips data (Blocks) and uses a Parity Disk. Requires at least 3 Drives. Not widely used.
RAID 5The most popular method. Requires at least 3 Disks. Disks are used to store Parity data as well for each perticular drive. Data Stiped in Bytes (uses block-level striping with parity). Supports Unlimited number of Drives. Failure rate Drops when the number of devices increas.High speed reads can be performed. But writing is pretty slow in this approach.
Note: The non-standard RAID levels 5E, 5EE and 6E extend RAID 5 and 6 with hot-spare drives. Other non-standard RAID levels include: RAID 1.5, RAID 7, RAID-DP, RAID S or parity RAID, Matrix RAID, RAID-K, RAID-Z, RAIDn, Linux MD RAID 10, IBM ServeRAID 1E, unRAID, and Drobo BeyondRAID.
So how are we going to implement such a structure in VMware?That is quite easy. This is an example of Disk Mirroring. Each disk has to have Similar Capacity.
  1. Click on "Edit Virtual Machine Settings".
  2. Click on Add ->Next-> Create new Hard Disk.
  3. Select SCSi.
  4. Give a Suitable Disk Capacity for new Disk.
  5. Give a "Name" and Browse the storage location.
  6. Click on Finish.
  7. You have to Repeat the steps to create the number of Disks that you require. You have to have 2 Disks. Do not use the Main Drive. Use Separate Disks.
  8. Click on OK.
  9. Click on "Power on this Virtual Machine".
  10. After booting up the machine, its the time to implement the Mirrors.
  11. Log in.
  12. Right click on My Computer and select "Manage".
  13. Click on "Disk Management".
  14. Get the "Convert Disk Wizard".
  15. Select the 2 disks (tick on the check boxes).
  16. Click "Next -> Finish
  • Implementing RAID1
  1. Right click on the Disk n which your first added drive (n = the number).
  2. Select "New Volume".
  3. Select the option "Mirrored".
  4. Click on "Next".
  5. Add the Disks from the left hand list box to the right hand list box (the two drives that you have created).
  6. Click on "Next".
  7. Assign a Drive Letter.
  8. Format using NTFS. Make sure you provide a "Volume Label".
  9. That's all what you need to do!
  10. Wait until the Volumes get formatted and Synchronize.
  11. Implementation of the other technologies are similar to the above procedure.
Hope you would enjoy this tutorial.Thanks!
-Lasitha

on Jun 30, 2010 | Computers & Internet

1 Answer

I have a server running sql application. I need to create a backup system that replicates the current server to another server so that if my current server crashes; I can start the other one to provide...


This is a complex and diverse question due to the numerous scenarios.

A common setup: Dual servers setup on a fail over cluster. You basically make two servers seem as one with a virtual IP and name. Hardware breakdown is 2 servers with 5 drives each minimum. The first 2 drives the OS at RAID 1 (mirrored). The other 3 drives are the database at RAID 5 (striped). You now have hardware redundancy all the way around. When 1 drives fails, you simply replace the drive. The database is replicated and is fail safe. When a complete server fails or needs maintenance you just roll over the server / database to the other node via cluster administration.

This is just an example, but a very common SQL server setup in busisness enterprise environment.

Feb 05, 2013 | Computers & Internet

1 Answer

Confuguring raid5


Hi

You would need 4 Hard disk drives in total. you would need to create 2 RAID 0 (striping) and then Mirror them (RAID 1). to elaborate, HDD A&B will be at RAID 0 as well as HDD C&D. after, you would have to Mirror your two RAID 0. (raid 0+1 is also known as raid 5)

Hope this helps.

Jul 09, 2010 | IBM x3400 Server

1 Answer

Backup slow


Hi,
You don't specify whether previously on your USB it was the same lacie external or whether it was a different external drive. It sounds like you were using a different external drive, most likely a single drive.
You've specified that you've got your lacie setup in raid 5. Raid 5 gives a very good read spead and a good redundancy for incase a drive fails, however it's write speed is very very slow.
It will be much slower than a single drive on USB for writing to it (i.e. backups), but you should see a huge performance boost in reading from the drive than your previous usb.
If you need it to be faster, you would be better suited looking at configuring it for one of the following raid setups:
Raid 0: striping (not recommended for backups) - data is split over all drives, however if 1 drive fails you lose all data.
Raid 10: striping + mirror . half the drives are striped (like above), but the other half mirror the striping half so if one drive fails there's a backup of it. You only get half the disk space though, so if you have 4 x 1Tb drives, then you'll only get 2Tb of space.

Apr 06, 2010 | LaCie 2500 GB Network Storage Server

1 Answer

How to add new HD in existing RAID 5


Here is a link to info from Dell about exactly how to do it.

http://en.community.dell.com/forums/t/18625422.aspx

A few things to keep in mind:

1. Your data should be safe but back it up first anyway.

2. Schedule this off hours if possible as you won't lose access to the data during the re-striping process but performance will be degraded and it will most likely take hours to complete.

Jul 15, 2009 | Dell PowerEdge 6600...

2 Answers

I have hp proliant with raid 1+0 .I have 2 hard and usr in option


Sometimes shortened to RAID 10, RAID 1+0 is a particular combination of two different RAID levels: mirroring (RAID 1) and striping (RAID 0). The appeal of RAID 1+0 is simple: mirroring gives you the highest level of availability RAID offers, with the fastest rebuild times when a disk fails; while striping - using the proper chunk size - is the basis for high-performance I/O.

Jun 09, 2009 | HP ProLiant DL380 G4 Server

2 Answers

Cant create additional raid


if there is a limit this would have been mentioned in the features of the product

please have a check

Aug 01, 2008 | IBM xSeries 226 Server

1 Answer

Motherboard


Most of the new systems and motherboards support SATA connectors onboard. In your case there is none as you have found. So the best option is always upgrading to a new motherboard in case you need to add more SATA drives. You can also try to find SATA add-on cards, may a little costly types. These cards use PCI interface and very easy to install but hard to find one. I hpoe you could find one from a hardware store near you. If your motherboard has ordinary PCI slots then the SATA adpter will be less costly, otherwise (if it features a PCI-X slot) it will be costly. Following is a simple description on what the market has to offer: SATA II - 150 4Ports PCI-X with NCQ, Raid 0+1, Raid 0 and Raid 1 ! You can upgrade your desktop computer to have four Channels Serial ATA Generation 1 and Generation 2 transfer rate of 1.5 Gbps. The board provides a 64bit, 133 MHz PCI interface on the host side and four, fully compliant Serial ATA ports on the device side to access Serial ATA storage devices such as hard disk drive, ZIP drive, CD-ROM, CD-RW, DVD-ROM. Note: Fault tolerance: RAID 0 (Striping), RAID 1 (Mirroring), RAID 0+1 (mirrored-stripping) and RAID 1+S (Mirrored-Sparing) improve the data performance and provide the data redundancy and rebuilding.

Oct 09, 2007 | HP Pavilion 513n (P9850A#ABA) PC Desktop

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