Redundant Array of Independent Disks, a scheme to utilize multiple hard drives to increase speed and reliability or to provide for data recovery in the event of hard drive failure

learn more… | top users | synonyms

0
votes
1answer
227 views

Apple Software RAID: Add disk to array online

I recently purchased a WD Thunderbolt Duo, which has two 4 TB drive, now running in RAID 0 with Apple Software RAID. My question is simple, if I am to get another Thunderbolt Duo next year, is it ...
0
votes
0answers
669 views

Reverting from Mavericks to Mountain Lion on dual SSD's in RAID 0

So I have my MBP Late 2011 setup with Dual SSD's in a RAID 0 Configuration. Since this is a software RAID, I don't have a functioning Recovery HD and I need to erase the Mac and get back to a stable ...
1
vote
1answer
401 views

When creating a RAID 1 mirror set, do you need to have both disks available or can one be added later?

I'm planning my transition to Mac OS and I have a pair of mirrored drives I would like to move to my future computer. Since they are currently formatted as NTFS they will need to be reformatted during ...
0
votes
1answer
878 views

Can a file be copied to one hard drive in a RAID 1 mirror set (software RAID), and later have the 2 drives sync up?

I think I read that we can set up a RAID 1 mirror set (software RAID) using OS X Mountain Lion using Disk Utilities, and later plug in one drive and copy a file to that drive, and later on, plug both ...
0
votes
1answer
83 views

OSX partitions wiped by NAS RAID

So I messed up when I thought it would be a good idea to stick some hard drives into my NAS. It's now changed the partition table to a RAID0 one and my data has vanished. What are my best chances of ...
1
vote
1answer
408 views

RAID 1 with Two LaCie 5Big Thunderbolt

I'm looking at getting a LaCie 5Big Thunderbolt unit for archiving purposes. I would like to get a second one and use Disk Utility to create a Mirrored RAID Set from both of them so that I have a ...
4
votes
2answers
6k views

Replace a failed disk in a Disk Utility RAID 1

I have LaCie 2big thunderbolt 2-disk device configured as a RAID1 from Disk Utility. One of the drives appears as "failed", so I unmounted the raid, replaced the drive and plugged it all back in. Now ...
5
votes
1answer
1k views

Can I Mount a Hard Drive in Mac Pro Tower as Read Only?

I'm trying to recover data from a failed external Fantom RAID Drive enclosure by plugging the drives into a Mac Pro tower, but I'm concerned that OS X might write to the disks and jeopardize the RAID ...
1
vote
1answer
46 views

RAID system with external hardrives

I have a few external ssd hardrives (My Passport, in my case). I would like to integrate them within a system that provides reliability in case of failure, by producing redundant information across ...
2
votes
1answer
7k views

Which SSD Thunderbolt Product For Main Boot Drive for my iMac?

So I have a 2012 iMac. I got the base model 21.5" which means I have a painfully slow 5400 RPM hard drive. The pure SSD option would have cost $1,300 ($1 more than the $1,299 base price) if I could ...
4
votes
2answers
4k views

Why doesn't FileVault work on a RAID volume?

At work, I said to my colleague that it was not possible to enable Filevault on a RAID volume. He was surprised and asked me the technical reason. So I would like to know. It's strange because ...
0
votes
0answers
2k views

The disk you inserted was not readable by this computer

I am getting a system message from Mac OS x 10.8.2 every time I power on my ICY DOCK RAID enclosure. I have followed the procedure in the manual to the letter. Installed two new 2TB HDDs > Changed ...
0
votes
1answer
219 views

RAID questions with ML

I'm looking to build a NAS box and putting ML on it. I currently have two drives that are configured as RAID one that I am pulling out of a NAS box. I have one drive that I'd like to add to the two ...
1
vote
1answer
268 views

How can I reconfigure the RAID settings on a Maxtor OneTouch III?

I have a 1TB Maxtor OneTouch III. This is the drive that comes with two 500GB disks and software to configure RAID 0 (mirroring) with 500GB of storage, or full use of both disks for 1TB of storage. ...
0
votes
1answer
313 views

Break RAID0 to have separate drives

I have an enclosure Hornettek Dual Bay SATA Case with removable disk trays, and RAID0, RAID1. USB3.0 and eSATA dual bay case with two 2T WD drives. My idea was to set them up as separate drives to ...
1
vote
1answer
198 views

Deleted over 4TB on Promise VTrak, still shows as full

This is not a duplicate of Why is my hard drive still full after deleting files? I have of course attempted all methods mentioned there. Via the terminal I can see nothing listed on the drive. I was ...
0
votes
0answers
239 views

Will RAID-0 speed up OS X that is installed on external SD card?

I'd like to have some portable OS X installation that I'll be able to use with different machines (MacBook at home, MacMini at work, etc.) I installed Mountain Lion on my 32GB class 10 SD card ...
2
votes
2answers
522 views

Bootcamp won't run on OSX in RAID0

I have my MacPro booting into Lion off a 3 disk (software) RAID 0 array. I want to dedicate a fourth drive to Windows 7 via Bootcamp. However it won't run at all on my system, exiting with a 'RAID is ...
3
votes
4answers
2k views

Why does RAID 1 “Mirroring not provide performance improvements”?

I have always used Software RAIDs, either Apple-provided, or via SoftRAID, etc. I am about to re-zhuzh my arrays and decided to do a little research beforehand… and On Apple's site, there is a ...
5
votes
1answer
424 views

Can I convert a RAID 0 set to a RAID 5 set?

Can I convert a RAID 0 set to a RAID 5 set in a Mac Pro? I currently have two 500GB drives in a RAID 0 set. I want to add a third drive and convert it to a RAID 5 set. Is it possible to do this ...
3
votes
2answers
387 views

Can I setup a single Sparsebundle in RAID 1?

My goal is the following: use my iMac as a TimeMachine Server (under OS X Lion Server) to backup my MBP via the network. What I did is to choose, in the TimeMachine Server configuration, the internal ...
2
votes
1answer
286 views

Can I install/upgrade from SL to Lion on RAID0?

I have a 2007 Mac Pro with a 3-disk RAID0 bootdrive. I want to do a clean Lion install on the RAID volume but I'm not sure if there are any known issues with doing this. I seem to remember that last ...
1
vote
1answer
427 views

On the Mac, what if Disk Utility is used to mirror two hard drives, one is 1.5TB, and the other is 2TB?

If I happen to have two external hard drives, one 1.5TB and then other 2TB, and use Disk Utility to mirror the two drives, will there be any problem? Can it be mirroring just for the 1.5TB portion, ...
0
votes
1answer
476 views

How does it affect the performance if an iMac 1TB internal hard drive is mirrored on an external drive?

I am getting an iMac 27 inch, and it will have a 1 TB internal hard drive, and I know we can set up the Mac so that this hard drive is mirrored on an external 1 TB hard drive using the built in tools ...
4
votes
2answers
814 views

With Mac Pro, is software RAID 0 worth it?

Does anyone have any reason to believe RAID 0 is any faster than independent drives on a Mac Pro? I have always run my Mac Pro with all five drives in RAID 0. I recently decided to try out Bootcamp ...
1
vote
2answers
796 views

Any Hard drive Mirroring or Software Raid or Sync tools on the Mac that are free?

I am trying to mirror a hard drive that is 3TB on the PC using SyncToy from Microsoft's PowerToys (as a backup method). But Mac is usually better for indexing and content searching, but is there ...
0
votes
1answer
197 views

Upgrading to Lion - Questions about disks, RAID and backups

I've gone Lion on my MBP and now, having backed up four year's worth of files am ready to upgrade... A bit of background: I have a 2007 MacPro and have filled all four drive bays with: 2 x Western ...
1
vote
2answers
972 views

How to convert an exiting partition to RAID on OS X?

I just replaced my optic drive from MacBook Pro with another 500gb HDD and I want to speedup one of the partitions. The first drive has two partitions, named 106 and 107 and I want to convert one of ...