Raid 0 vs raid 1 mac
Keep working after a disk fails. Even if one of your disks fails, you can keep right on working and make your deadline.
Understanding RAID for Data Storage and Backups
None of your files will be lost. How great is that? RAID applies the "double-tired truck" principle to your data by spreading your files across 2 or more disk drives. Not only does this speed up data access, but if one disk fails, your data is safe on the remaining disk s —as long as you are using RAID 1 or higher. We started on Mac OS 7.
Considering a hardware RAID? Here’s what you need to know
A stripe volume cannot work unless all of its disks are present and working correctly. Stripe Unit Size. In a stripe volume, data is spread across the volume's disks in blocks. The first block of the volume is on the first disk, the second is on the second disk, etc. When you create a SoftRAID stripe volume, you will be asked to select the stripe unit size for your new volume. SoftRAID will help you choose the the correct value depending on the type of files you plan to store on your stripe volume.
We recommend stripe volumes ONLY for temporary storage - ie for any application where speed is most important and you have a recent backup. A great use for a stripe volume is as a scratch disk when using Photoshop, Lightroom or editing uncompressed video; it will give you the fastest possible scratch disk for these purposes.
RAID 0 is not a good solution for permanent storage. For this, and all other uses, particularly where the safety of your data is an issue, we recommend you use a RAID level which protects your volume from disk failure. SoftRAID mirror volumes give you the greatest level of reliability. Each disk in a mirror volume contains an entire copy of the volume. A mirror volume uses two or more disks to create a volume which is protected from disk failure.
Create a disk set using Disk Utility on Mac
Unlike stripe volumes, each disk contains a copy of the entire volume. As long as at least one of the mirror volume's disks is still working and attached to your Mac, the volume is safe and will function normally. SoftRAID automatically keeps track of which disks are attached to your Mac at any time and will correctly rebuild missing disks when they are re-attached to your Mac.
You can create fast mirror volumes, for starting up your Mac or for storing files you frequently use, by combining an SSD with a normal hard disk. The SSD gives you incredibly fast read speeds and the normal hard disk gives you the redundant storage which protects your files from disk failure. With most RAID systems, rebuilding a volume takes a long time.
Creating a software RAID-0 stripe
Rebuilding a multi-terabyte mirror volume can often take a day or longer. Whenever a disk is missing from a mirror, SoftRAID remembers which blocks of data are written to the volume while the disk is missing.
When the disk is reattached, SoftRAID only rebuilds those blocks, rather than rebuilding the entire volume. We recommend mirror volumes for all important files. If your business depends on the files stored on your Mac, you should be using a mirror volume. With a mirror volume, if a disk fails, you can keep working as the remaining disks will take over.
For the greatest reliability, we recommend a 3 disk mirror. The exception to this rule is when both products are based on the same RAID controller and the same firmware version. However, even then, it's important to make sure that the settings are identical and it's best to create a backup of all the data in a different location first, before moving the drives. For software RAID, the data can be accessed on other computers that are running the same operating system e.
RAID Arrays for Photography and Pro Video | B&H Explora
Windows and Mac OS. For network drives like the MyCloud series, the disks should be installed inside a product that is based on the same firmware and the drives will have to be mounted manually. Whenever you change something on an existing RAID, be that installing larger drives or adding additional drives, it's necessary to create a new RAID system.
Depending on the RAID controller and the amount of drives, you can select between different RAID modes to setup the disks according to your own requirements. The exact definition of these terms depends on each model but following is a general description. Not all versions of Windows support this function. Following instructions show how to create a RAID set with 2 disks. Scroll further down to see how to create a RAID 10 with 4 disks. If you use Mac OS X RAID 10 is useful for a storage enclosure with four drives, providing redundancy in case of a single disk failure yet still delivering fast transfer rates.
The only option is to use the Terminal and the diskutil command or purchase and install a 3rd party software like SoftRAID. RAID sets that were created on other systems can still be accessed. To learn more about the diskutil command, open the Terminal and enter man diskutil to call up the manual.
To prevent selecting the wrong disks and make it easier to identify the drives, we recommend to temporarily disconnect all other external drives and only connect the one which you would like to use for the RAID set.
With macOS As an alternative, you could also use paid software like SoftRAID, which uses a graphical user interface, provides faster transfer rates, comes with more features and includes technical support. When creating a RAID 5 system as described in this article, hot plug is not supported! When disconnecting the drive, it is important to first unmount and then export the RAID system by using the commands seen in step Otherwise, the system might crash and corrupt your data.
If you simply turn off the computer, this step is not required. When you reconnect the device or restart your system, the drive will automatically mount again.