Raid Software For Mac Os X

17.01.2019
Raid Software For Mac Os X 6,6/10 8333 votes
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Raid Software For Mac Os X

I have two hard drives that were set up as a RAID 1 set on a Mac. My Mac died, and I replaced it with a PC running Windows 7. I can't seem to figure out a way to read the data from my disks. I tried, which worked great for non-RAID disks, but it doesn't see either of these disks at all. These disks are in a Rosewill 8-bay external box, which comes with a utility called SATARAID5. The problem is, that software doesn't run under Windows 7. Does anyone have any ideas on how to get to this data?

RAID Options for Mac OS X March 19, 2007 by Ben If you’re anything like me, you often daydream of the wonderful computer setup you’d like to have someday if you can ever afford it. In the family of powerful and cost-effective data recovery software from R-TT, R-Studio for Mac is specially designed for the Mac OS environment.

Free antivirus program for mac I don't care if I end up with a RAID set or not. Parallels for mac desktop 3 max os high sierra. I just need the files. RAID storage formats (beyond simple mirroring) are typically proprietary -- I'd recommend borrowing a Mac temporarily to read the data off the array. Oops, just noticed you did mean RAID 1 mirroring! The software RAID must have written weird metadata to the drives, which is not typical for mirrors. Perhaps: One, many RAID cards store meta data at the front of the drive, usually the first 128 sectors of the drive are reserved for the RAID card to use. Information like drive state, time of last boot, size and other information that is important to the RAID card is stored there If, however, the RAID card is not the primary hardware interface but instead a standard IDE port then the BIOS has no way of interpreting vendor specific data.

In other words the BIOS looks at sector zero in the boot sequence, tries to find a Master Boot Record, then execute any boot it may find. The problem with this drive is that the MBR is 128 sectors down the drive since the meta data is stored in that area. Knowing this, we can trick the BIOS into skipping the meta data and pointing right to the OS boot record.

Wouldn't it be possible to do a dump of the data on one of the mirrored drives in Linux (backing it up on another drive as a file). Then you can use dd again to write everything back to the same drive except you start at 128 in the dump and 0 on the hard drive. Then use a hex editor and Apple's HFS+ tech docs to offset the pointers by 128 sectors. You might have to shift data at the end of the drive also since that is also reserved. The extra space you will have between the end of the data and the reserved data at the end of the drive you can just fit with random data or zeroes. That way you pretty much rebuild it back to how it would be if the RAID software never added those 128 sectors. I'm not sure how much work this would be and what the technological abilities of the original poster are.

Being a Software Engineer I would def give it a go if I needed to get the data back. Especially since you don't lose anything by trying since you can always dump everything back to the drive from the original dd dump.

RAID — — is a technology that allows users to combine multiple physical disks into a single virtual volume in one of several ways that can increase capacity, increase speed, increase redundancy, or some combination of the three. A deeper look at RAID is beyond the scope of this tip (for a quick overview, from Techquickie‘s Linus Sebastian), but the key point is that the ability to create and manage software RAID volumes — something that was possible in previous versions of Disk Utility — is no longer available in OS X El Capitan.

Previous versions of Disk Utility included the ability to create and manage RAID volumes. While El Capitan’s version of Disk Utility may be missing this important feature, the good news is that users can still perform many RAID functions via Terminal. The process isn’t as simple as the old Disk Utility GUI, but for users running Apple’s latest desktop operating system, it’s the next best thing to investing in third party software.

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To illustrate how users can manage RAID volumes in OS X El Capitan, we’ll use an example in which we want to create a 2TB RAID 0 volume from two 1TB SSDs, labeled TB1 and TB2. The first step is to determine the disk number of each drive you wish to include in your RAID, as we’ll need this information for the Terminal command that will eventually create the RAID volume. We can obtain this information in one of two ways: via Disk Utility or via the diskutil command line function. Looking at GUI method first, launch Disk Utility and select the first disk that is destined for your RAID volume. In our example, we’re using two Samsung 840 EVO SSDs, so we’ll select one of the disks, not volumes, from the Disk Utility sidebar on the left. With the disk selected, find the Device box on the right side of the screen and note the disk number. Format a new external hard drive for mac 2017. In our case, our SSDs are disk2 and disk3. If you prefer to stick with Terminal, you can run the diskutil command to identify your Mac’s disk numbers.

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