RAID 0 means to stripe the data, one bit going to one drive, another bit going to another drive and so forth. So I have the external hard drive installed now as RAID 0 HFS+, and I use it for backups and storage and that's the best way to use it?ĭepends how much data you have to deal with. If you get a large disk, be sure you have an equally large disk to back it up to. As I filled it up with data past the 4TB point, TimeMachine would not backup saying that the backup set was not big enough to fit on my 4TB MyBook FireWire800 drive. I bought an 8TB WD ThunderBolt RAID, which by the way appears as two separate disks to Apple's Disk Manager. a failure will be almost impossible to debug and unsupported by either Apple of WD.Īnother thing to note is that TimeMachine may end up biting you on these kinds of large disks.
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I would also not get overly complex with these and try to mirror them and use them as RAID components in the Mac sense, that is configure them as separate RAID disk elements under Mac Control. Restoring or rebuilding a lot or data takes a long time there is no way around it.ĭO NOT rely on the mirroring redudancy for backup, there is a more than good chance you will regret it. That way if you do have a failure you can just remount or rename the backup box and you are up and running immediately without having to restore. if your data is valuable to you.Īnother scheme might be to get two of the same boxes, stripe them for storage and speed and use something to copy one to the other. but just to be safe it's good to have even another backup disk. If two boxes as striped the chances of both of them going bad at the same time are remote. I got two of these boxes and use one for the data and the other for the TimeMachine backup. I am OK with using the striping, IF and only IF the data is backed up somewhere else. which can take a day or more under certain circumstances. A WD RAID 0 failure rebuild is as simple as removing the old disk, dropping in a new one, and waiting for it to rebuild. Maybe they've fixed that, but I would not count on it.
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according to WD support and my own experience. you cannot get a new box and just drop your old good disks into it and expect it to work. One thing to note is that you lose your data on these if the box itself fails, as differentiated from either of the disks themselves.
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They have eventually replaced two broken items I have had, but not been much technical help and do not really know how to opertate their own products. These things are great, because they are very quiet compared to anything else I've seen on the market. RAID 1 - mirroring, duplicates data across drives with redundancy and much less expected failure rate. RAID 0 - striping, twice the storage but with no redundancy and twice the failure rate of a single disk, The WD MyBook is managed from within the WD drive manager program.
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How to properly defrag a Mac's hard drive However if your MBP is slow, there are some things you can do to speed it up, before or after installing a SSD. Some Photoshop freaks do this as it's faster than their boot drive, it's called time shifting and/or "scratch disk", as every night they still have to back the RAID 0 up, but that can be done automatically.
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You'll see it's really no difference in real day to day operations, but the tests will of course be awesome. You can buy a external RAID 0 setup, try to use it on a Thunderbolt or Firewire 800 interface, clone OS X to it and hold the option key down to boot it and try it. I've used a RAID 0 on my PowerMac G5 for many years, it's only fast as long as one is very highly productive, or doing a intense amount of video transfer work, even then it has to auto-cloned/updated nightly as it can fail one morning right out of the blue. RAID 0 two SSD's is just too much speed that will never be used. As both have to be equally fast, or speed defaults to the slowest drive.ĥ: SSD's offer top speed and not as hazardous as RAID 0 with fragile hard drives.
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You need a extra exact drive to replace one that fails.Ģ: You need to clone the present install to a external drive, boot from it, then create the RAID 0 and reverse clone.ģ: You have to always maintain the clone with updates, as the RAID 0 will fail 2x faster than single spindle drives.Ĥ: You'll see just about little improvement in 95% of your usage, except when copying very large data sets (50GB+) to another RAID 0 or external SSD on a Thunderbolt. RAID 0 is a waste of time even if you could do it.ġ: Both drives have to be of the same size, make and on similar connections like internal SATA.