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29

The previous answer I gave here was wrong (as is bmike's answer). The previous answer I gave was that if you have this as a problem, a workaround is to create an encrypted disk image that covers the entire AppleRaid set. This works, in theory, but is so horribly slow (like more than 10x as slow as the raw disk access) that it is basically unusable, which ...


10

I was unable to find how to rebuild the RAID from disk utility after a couple of hours of research. However, I managed to do it from the command line. sudo diskutil list // to get a list of disks. Note the disk number of your new disk (e.g. disk4) sudo diskutil appleraid list // note the uuid of the raid in question sudo diskutil appleraid add member disk4 ...


9

You can't fix this. The size of a RAID is always a multiple of the smallest volume used in the setup. The chunk sizes (stripe sizes, interlace sizes) as well as the number of chunks have to be equal on all used volumes. Usually the chunk size is 64 kb. These requirements are determined by the size of the smallest disk and limit the size of the resulting ...


9

Given you’ve already done the work once, you will be the best to know. SSD - always a great investment, plus they are almost always fungible - you can put them in newer gear with little to no degradation on speed if they still have life. RAM - low risk upgrade as well. Especially if you don’t need to max it. Add it only when your benchmarks prove you need ...


7

I wouldn’t put that kind of money into this. Why? At the end of the day, you still have a decade old computer that cannot run the most current operating systems Maxing our the RAM only has benefit if you are making use of the memory. If 24GB was more than enough then 32GB won’t do a thing. It’s like having 3 cars driving on a 6 lane highway. Making it 8 ...


7

Apple is dumping Intel processors and going ARM. (An Apple Store employee prognosticated this to me in late 2018). Last two times they did this, they badly burned people who had just bought 68k or PPC Macs. They're handling it better this time by letting it be an open secret, but I would not buy a new Mac for now. I'm writing this on a mid-2007 iMac right ...


4

In the end I went with the most expensive but also the fastest option: #1 which was the Mercury Accelsior PCIe based SSD hardware RAID array (RAID 0 by default which I will keep) in a Mercury Helios Thunderbolt PCIe chassis. The main reason was because it was the only one that mentioned it was bootable (and made a big deal out of that fact). I paid $799 ...


4

Do you have the following files? /System/Libraries/Extensions/HighPointIOP.kext /System/Libraries/Extensions/HighPointRR.kext If so, copy both of them to your desktop, then: Open those kexts and edit the Info.plist. Change all the 'External' references to 'Internal' Copy the modified kexts back to '/System/Libraries/Extensions/' from your desktop. ...


4

The time Capsule would need to be jailbroken and modified to get RAID drivers into that software stack. It would probably be easier to physically remove the drives and build a new enclosure that can support RAID with the drives and then either connect that to the network or somehow connect the controller to the hopefully still functioning Time Capsule via ...


4

I think what is going on here is both expected behavior and an exercise in learning a little terminology. It is normal for a Mac to see a third party created RAID array as a single disk (which I am assuming it does) In both the Finder and Disk Utility? Why? Because the LaCie utility is designed to create RAID arrays that are completely transparent (or if ...


4

Most points have been covered by other answers: but one point I would make is that whatever you do to this 2011 iMac, you're still limited to High Sierra or earlier. So if you want to run older software, e.g. Office 2011, Creative Suite 6, etc, with as good performance as possible, then that's a reason to proceed. But of course, with each year, the apps ...


3

In a RAID 0 set established by Disk Utility you, of course, have zero redundancy. The moment one of the drives is lost from the set the entire set becomes useless and you have a volume failure. If (and only if) no attempt was made by anything to write to the volume while the physical drive wasn't there you might be lucky and it will be OK but otherwise you ...


3

As of El Capitan, the Disk Utility application no longer provides RAID functionality, but it remains in the diskutil command-line program. For brief instructions, type diskutil appleRAID or diskutil appleRAID create in the terminal. For more detailed information, type man diskutil. List of available RAID commands: askewchan ~> diskutil appleRAID Usage: ...


3

This can be done from the Disk Utility app or from the diskutil command line. Be warned that you should definitely make a backup before doing anything. I had an issue where the diskutil appleraid enable mirror disk1s2 command I ran wrapped the volume in a RAID set but the partition is now called Apple_RAID_Offline and no longer accessible. Ironically ...


3

You're thinking of RAID-1 in the wrong way. RAID-1 is not an architecture intended to happily use a single surviving drive within a raid-1 group, and work out mirroring content later. Ultimately it will do that, but that is considered a recovery operation from a failed state, and it will destructively overwrite the mirror drive after replacement. In RAID-1, ...


3

You do know that RAID 0 is only striping and not only provides no redundancy, but increases the risk of data loss as the failure of any single drive can mean the loss of the entire storage pool? RAID 0 is only for increasing read and write speeds, for example for video editing. You need at least RAID 1 or 5 for redundancy. That being said, if you're losing ...


3

First thing I would like to comment on is "just reliable back-up of specific files." and you asking about Drobo RAID. RAID is not a BACKUP, RAID protects you against a physical drive failure, it doesn't protect against deletion, corruption, overwrites, etc. Just copying your files to a system with RAID (i.e. Drobo) isn't backing them up, it is just making a ...


3

First of all, empty your trash, reboot & try out disk utility again if you haven't already. If that doesn't do it though you'll have to dig a bit more. Here's the terminal command for finding hidden files & folders: defaults write com.apple.finder AppleShowAllFiles YES. Put sudo in front of that if it doesn't work - you'll have to enter your user ...


3

Time Machine can't partially backup to one drive, then when space runs out, continue to the next drive. But you can concatenate several drives to look as one and then use Time Machine. As you have said, you can create a RAID drive. This should work with Time Machine. Recovery would look normal. (See here). You can restore from Recovery, Migration ...


2

First let's clarify one thing: RAID is not the same as backup. Building a RAID array out of several (presumably USB) external drives would have many drawbacks. See this question I asked a while back for the explanation. I suspect what you really want is passive and seamless disk/data backup in which case OS X's built-in Time Machine works great. And if you ...


2

For redundancy and performance Apple steers you towards RAID 10. I built a 4 disk array by doing a mirrored pair of striped disks which I then converted to a core storage volume to facilitate easier expansion later and FileVault. I can watch data be written to both stripes with iostat but when I read, presumably this is abstracted by cs, as I see zero bytes ...


2

These are what we call implementation details. You can implement RAID 1 in a variety of ways, Apple choose to implement it in a way without any speed gains.


2

Firstly, RAID shouldn't include your backups. Something catastrophic hitting one, will hit the other. Eg. fire, burglary, etc. Ideally, you want to keep one set off site. Using the 2 disks you can keep one at a friends, and sync the up periodically. There are tools that allow you to do this. Alternatively, something like BackBlaze, Amazon Glacier, will give ...


2

Yes - Apple's software RAID works so that once all the drives are present (or in the case of RAID mirroring - enough drives to ensure one copy of the data is present), you can then mount the RAID volume. Unless you used a third party RAID driver in software or hardware, just getting the drives mounted should work.


2

That's basically the only way unless you have one of the older mac pro's with the raid card. if I was you over usb id leave them as stand alone drives.


2

Yes, it's call RAID 10. With 4 drives you can also do a RAID 5 which is more distributed than a RAID 10.


2

You could setup a Mac OS X Server and boot from the network, however you will need to have a third Mac, which might be costly unless you have an old one. You can purchase the Server from the AppStore for $20. However, booting your Mac from your server requires a moderate internet connection as well as a quick bandwidth (at the place where the server is and ...


2

You're using Apple's RAID which means you need a device which just hosts the discs and then your new laptop will see them and use the existing RAID structure. This rules out NAS. AS these are existing RAID arrays you can't simple merge them together to create a single new RAID. At least, you can't while keeping the data on them. Essentially, in one device ...


2

I have a similar environment here. I would split the task into 2 distinct parts. For changing content, excluding all sample libraries etc. set up a Time Machine; internal, networked, AirPort Time Capsule or NAS-type. To keep any depth of history you will need a lot more space on the Time Machine than you have on the used drives. Copy the static content ...


2

I am a programmer. I create websites and perform analysis on large sets of data. I have also advised clients on setting up their own servers and designed backup systems for them. I assume that these computers and data represent you business and/or your passionate hobby. In either case, I assume that loss of data would be devastating. Based on you brief ...


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