RAID 1 As Backup?
http://www.storagereview.com/western_digital_velociraptors_raid_ssd_alternative share|improve this answer answered Jul 1 '15 at 21:48 Datarecovery.com MK 44418 add a comment| up vote 0 down vote What's up with all these long-winded answers? Raid 10 is probably the best for speed with Raid 6 being better for getting more space per drive when you go past 4 drives. This means if you are working on a file and one of the internal drives in a RAID fails, the storage device can continue to work normally. (Some RAID setups can A 500 GB drive has 0.04E14 bits, so in the worst case rebuilding that drive in a five-drive RAID-5 group means transferring 0.20E14 bits. have a peek here
Backups protect against data loss from a broad range of events but restoring generally involves downtime. Backups are copies and archives are originals. This post needs to be updated since I have since replaced the tower with an iMac 5k Retina machine. It would take about an hour to upload 5GB of data. check that
Why Raid 0 Is Not An Option For Data Protection And High Availability
If you have no backup and your hard drive fails, there's a good chance you can recover some or all of the data on that drive, expensive as such an exercise My workstation has a single RAID 5 array consisting of three 2TB SAS drives plus one hot spare. Then I realized who was telling me this." If ignorance were painful, half the posters here would be on morphine drips. Otherwise, I've never had to use it.
Never had to go to the cloud. backup share|improve this question asked Feb 20 '16 at 11:59 Michal Kaut 1083 4 RAID isn't a backup. And lastly the RAID rebuild time can be a very long process that could take days depending on the amount of existing data stored on the storage device. Research Raid 6 And Its Second Parity Computation. It reduces data access time by saving half of the data to each disk, and reassembling it in memory.
Again: Redundancy is not a form of backup, but just a fail-safe measure in case of failure of the storage device's internal drive or drives. I'm planning to use RAID 1 for my home NAS as well partly for this reason - plus terabytes are pretty cheap now. Rarely am I asked more questions after the first 6 months unless its things outside the scope of the shop they are running. http://www.petemarovichimages.com/2013/11/24/never-use-a-raid-as-your-backup-system/ If you delete a file, it is deleted on the mirrored copy as well.
I have learnt a lot about the pros and cons of RAID and proprietary systems to then find your article, the best on the net for my purpose. Raid Backup System I was able to recover it using Data Rescue. It was supposed to be a free program for VAT taxes, but it turned out that it was a virus that deleted all the data. Sounds to me like much of that could be archived, i.e.
- Other deals offer 1 TB at $50 a year unlimited machines and there are offers with Synology now for some cloud backup that is very reasonable such as $10 TB per
- Browse other questions tagged backup or ask your own question.
- RAID10 is going to require drives in multiples of 4 (I think; it might be exponential.
- share|improve this answer answered Feb 20 '16 at 14:19 Journeyman Geek♦ 97.8k31181307 For the last point: I will have to do it that way, since the only way way
- The years just pass like trains.
Explain The Process Of Data Recovery In Case Of A Drive Failure In Raid 5.
I use NAS for backups and all of my NAS are raid 1 or raid 10. click here now This makes RAID very good for video editing systems. Why Raid 0 Is Not An Option For Data Protection And High Availability Note: In addition to standard RAID (such as RAID 1 or RAID 5), there are also proprietary RAID setups that, apart from offering redundancy, also permit scaling up data. Best Raid 1 External Hard Drive There is also another copy of each of those drives in a safe deposit box.
Additionally, multiple computers can back up to one device at a time and there's generally no limit in terms of storage space. http://hcsprogramming.com/raid-1/raid-1-hdd.php Backup done.Want an easier or additional level of backup? How important is that data? However, each "backup" you describe is actually a backup, just because the person using that method isn't properly aware of the shortcomings of that system (and/or not being sensible about how Best Raid For Backup
However, each "backup" you describe is actually a backup, just because the person using that method isn't properly aware of the shortcomings of that system (and/or not being sensible about how the enclosures I bought also have a USB interface. With no hotswap, its a matter of shutting down and swapping in the new drive. Check This Out Or is there a much smarter way, ie RAID 5 on both?
http://www.enterprisestorageforum.com/storage-management/making-raid-work-into-the-future-1.html A UER on SATA of 1 in 10^14 bits read means a read failure every 12.5 terabytes. Raid 1 External Hard Drive Reviews Job done Reply Paul says: July 25, 2015 at 11:06 pm Very helpful info - thanks. The years just pass like trains.
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The disk that you removed is your back up. In fact, RAID controllers can -- and often do -- fall by the wayside in spectacular ways that take down all the drives in an array at the same time! Retrospect was problematic too. Drobo System Shouldn't it be RAIDed to replace the disk to preserve the data?
Redundancy also doesn't offer versioning, in which data is saved in different versions (see discussion of backup below). I'm assuming the first scratch disk is listed on the diagram as "Last Two Years Work" that also contains the raw files from the last two years. Sure, go with RAID1. http://hcsprogramming.com/raid-1/two-raid-0-and-one-non-raid-drive.php The problem, of course, is that eventually having all these images online at once will be unmanageable.
So even if both drives in the array fail, the image will be safe, glory be! Top Glorious Gold subscriber Gerbil Khan Posts: 9281 Joined: Tue Aug 27, 2002 6:35 pm Re: People who say "RAID1 is not a backup" Quote #10 Thu Apr 14, 2011 Of course if the building they are in blows up then its all gone so offsite is smart. If a new nation was founded in a federation like the European Union, what kinds of names might it be given?
more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed You'll never hear someone say "restore a file from yesterday's RAID for me". The work disk contains ALL RAW files from the current year. I wave, but they don't slow down.-- Steven Wilson Top Glorious Gold subscriber Gerbil Khan Posts: 9281 Joined: Tue Aug 27, 2002 6:35 pm Re: People who say "RAID1 is
Thanks! It does that very well. I don't use cloud for backup yet because the storage space for the money isn't quite there for me. Deleting something on my drain drive doesn't cause the file to be deleted from my backup raid1 array.
RAID 5 (which requires at least three drives) uses at most a third more drive(s) than necessary.