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Redundancy is not backup. Retrieved 2014-07-27. ^ "Triple Parity RAIDZ (raidz3) (Solaris ZFS Administration Guide)". Reply Mike says: November 12, 2015 at 3:08 pm Wow, amazing wealth of info here. the Caviar Black line), making such drives unsuitable for use in RAID configurations.[69] However, Western Digital enterprise class drives are shipped from the factory with TLER enabled. have a peek here

Retrieved 2014-06-11. ^ a b "Which RAID Level is Right for Me?: RAID 1 (Mirroring)". This would avoid the nightmare of plugging drives in and out and trying to figure out which things have been backed up. You can recover data from Raid drives but it will be expensive. Post update is forthcoming. http://stackoverflow.com/questions/19037143/why-is-raid-1-considered-bad-for-backup

Raid Movie

Since each drive is an exact duplicate of the other, you can continue working if one fails. that's what the industry in fact currently recommends as it reduces both RPO and RTO and help you have your data available almost every time. I found out, that during the partitioning I got other blocksizes for the new drive: # blockdev --report RO RA SSZ BSZ StartSec Size Device rw 256 512 4096 0 2000398934016

  1. Packt Publishing Ltd.
  2. I hope my question is clear .
  3. But there are a lot of good programs out there.
  4. Chapter 19 GEOM: Modular Disk Transformation Framework.
  5. If the RAID software reads garbage from the first drive, it WILL write it to the second drive.
  6. For example, block A is on drive 1, block B is on drive 2), and this permits increased write and read speeds.

JungleDisk is a perfect cloud backup system. Considering implementing a mirrored array (RAID Level 1) for your important data. Most PC users today have two immediate options for building a mirrored array of hard disks: their motherboard's chipset and I was only suggesting that Raid 1 is a perfectly suitable medium for backup data. Raid Computer Hadoopblog.blogspot.com. 2009-08-28.

Well written! Raid 10 We'll send you an email containing your password. Reply cosus says: April 24, 2015 at 2:24 am When I was looking to backup my RAW photos and files in general, first of course I do ue time machine. https://en.wikipedia.org/wiki/Standard_RAID_levels Reply Tom sheaiker says: July 10, 2016 at 11:00 am I also agree: "RAID is not backup" But if you have a backup, I suggest to use RAID in the backup

At this point, I do not care if I rebuild or fix the Raid-1 but at least I would like to recover my data that is stored on md3. Best Raid 1 External Hard Drive RAID 5: Benefits and issues in virtual environments A comparison of RAID 1 and RAID 5 technology RAID 1 security Mirroring drives: Approaches using RAID 1 and RAID 10 Related Terms Great writeup but I believe the most important thing is off site backup as well as on site. Retrieved 2015-08-17. ^ "Linux RAID Setup – XFS".

Raid 10

They might not care about your data, but you will still lose the data if they take the drive. Mathematically, the generator is an element of the field such that g i {\displaystyle g^{i}} is different for each nonnegative i {\displaystyle i} satisfying i < m − 1 {\displaystyle i

Transfer all of your important files to your new "drive" and have a little peace of mind. http://hcsprogramming.com/raid-1/raid-vs-mirror.php worked exactly as described :-)

From: Lars Reply One of the best step-by-step tutorials to replace a failed hard drive, thanks! This software does not mirror the primary drives but backs up files and changed files. Phoronix. Raid 5 Calculator

Second question: Is there any point in using SuperDuper if I'm already using Time Machine? However, some synthetic benchmarks also show a drop in performance for the same comparison.[11][12] RAID 1[edit] See also: RAID 1E Diagram of a RAID1 setup RAID1 consists of an exact copy Get a replacement hard drive so you can rebuild the mirror. http://hcsprogramming.com/raid-1/two-raid-0-and-one-non-raid-drive.php However, some RAID implementations allow the remaining 200GB to be used for other purposes.

The difference is simply that backup solutions are setup to facilitate you restoring data from years, months, or weeks ago while RAID 1 solutions take care of data backup that is Raid 50 Windows Server operating systems from 2000 on have JBOD, 0, 1, plus support for RAID 5 distributed parity. You are limited to using Western Digital's GreenPower hard drives for disk replacement and upgrades.

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Disk /dev/sda: 2000 GB, 2000396321280 bytes 255 heads, 63 sectors/track, 243201 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 1 Reply Alec Dann says: February 25, 2016 at 12:04 pm I get what you say about RAID as a back-up system but I would argue there's nothing wrong with it as This works by either striping data across a pair of drives then mirroring (0+1) them with another pair, or striping data across two mirrored pairs (1+0, aka 10). Raid 1 Vs Raid 5 You're talking about RAID like it in itself is a backup method.

Docs.Oracle.com. Thanks to Falko and the other helpful posters.

From: Stephen Jones Reply Class tutorial - just repaired a failed drive remotely (with a colleagues assistance at the location) flawlessly RAID is not a backup. http://hcsprogramming.com/raid-1/raid-0-to-raid-0-1.php RAID and RAID levels RAID, or redundant array of independent disks, is a method of grouping individual physical drives together to form one bigger drive called a RAID set.

RAID at DMOZ "Empirical Measurements of Disk Failure Rates and Error Rates", by Jim Gray and Catharine van Ingen, December 2005 The Mathematics of RAID-6, by H. Retrieved 2014-01-02. ^ a b c Vadala, Derek (2003). I don't look forward to backing up our mission critical data! Of course!

Reply Greg Taddeo says: December 15, 2016 at 12:05 am Nicely spoken! AnandTech. It was very useful to me.Just one thing I would add, when you explain how to copy the partition table, I would make a BIG note stating that one should have I've heard that I don't need to be able to read fast, I just go to be able to read!

An advantage of this model over the pure software RAID is that—if using a redundancy mode—the boot drive is protected from failure (due to the firmware) during the boot process even Thankfully, this incredibly annoying limitation of Windows XP doesn't apply in Windows Vista and Windows 7 which can read drivers from hard drives, flash drives, or optical media.Tools: You'll need a Sorry There was an error emailing this page. However on several occasions it has happened that all of a sudden, time machine completely erases itself and starts over from scratch.

If your disk is corrupted by a software bug or virus, the corruption will be done to both mirrored copies simultaneously.