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

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Is it possible to restore a backup from a single disk on RAID1?

I want to setup a Mac Mini Server with the following configuration. The Mac Mini server has 2*1TB HDDs. I want to do the following: Setup the server Create a backup of the system on an external ...
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1answer
10 views

Will the Mac Mini late-2012 try to reformat dual PC raid discs when I plug them in?

I have a new Mac Mini late 2012 model replacing a PC with dual 2 TB hard drives set up in Raid format mirrored and auto save. I want to put them into a caddy, a Startech 4-bay SATA version with a ...
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2answers
48 views

How can I mirror two macbooks [duplicate]

I have two macbooks. I want them to be exact copies. They have different CPUs, RAM, but they have the exact same drives. I work on both of them. I never work on them simultaneously. Can I setup ...
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8 views

Manually force sync on AppleRAID 1

I'd like to force a sync or repair on my AppleRAID set as part of a regular maintence. Under Linux (md) I can do this by writing to control devices. Diskutil does not seem to offer me such an option.
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62 views

2 Mac Mini Server in a restored RAID 1 config and question mark folder at boot

We have two identical Mac Mini servers (let's call them A and B) running OS X Lion with two 500 Gb HD. Using a Thunderbolt cable, a RAID 1 matrix was creating using three HDs (2 from A, 1 from B) with ...
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36 views

Promise pegasus 4x2TB Disk upgrade [closed]

I have a promise Pegasus with 4x2TB Hitachi disks, would it work with any (or some specific 4x4TB disks?
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61 views

Partitioning RAID 1 on Mac Mini

I have 2x 750GB drives in the Mac Mini. I want to partition it to have 250GB for OS and 500GB for Service Data. I thought I could create the RAID first, then partition it but it does not give me an ...
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28 views

Raid 0 - Why am I constantly losing data?

I have a Mediasonic 4 bay drive enclosure like this with four 3TB Toshiba HDD's attached to my hackintosh machine. The drives are in a RAID 0 configuration setup with Disk Utility. I've had this ...
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60 views

RAID 0 On 21.5" iMac Late-2012

I am about to get my fusion drive upgraded to a 256gb SSD on my Late-2012 21.5" iMac that I got from work (don't worry I have a company upgrading it, and yes they know its a Late-2012 iMac). When ...
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61 views

Raid two external hard-drives with read/write support on Windows & OS X

I have a USB 3 HDD enclosure that currently has two 1TB drives in it. I am looking at buying another external USB 3 HDD drive (not an enclosure). I am currently running the external enclosure with the ...
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50 views

How does Time Machine make room for new users?

This is more of a hypothetical question, but we've been using a Time Capsule to back up our Macs, and it has steadily been filling up since the year or so that we've had it. We've since brought a few ...
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25 views

XServe 10.6.8 with Fusion R800 Raid. Raid shows as fully functional, but Xserve doesn't see partition

I have a Sonnet Fusion R800 RAID array with 8x3TB drives in it. The unit recently had a strange issue with the power supply that has since been addressed. Once the unit was able to power back on, the ...
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41 views

Can one slice of a “Disk Utility” RAID mirror be moved to a new computer?

With a 2-disk RAID mirror created in Disk Utility, after one disk fails, can the remaining good disk be moved to a different Mac and used successfully?
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74 views

RAID 0 and 1 combo?

If I understand correctly, RAID 1 is two drive that mirror each other, and if one fails, it can be replaced and some hours later, it's a mirror of the good drive. Raid 0 combines 2 drives in a way ...
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56 views

Something like MHDDFS for OS X?

I'm trying to have my Mac Mini take over all my server's functions (I'm recycling the server hardware into a Linux workstation). Its pretty much all done, except for the file-serving portions. ...
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83 views

Repurpose 2006 Mac Mini for Time Machine with external HDD

I have a Apple Mac mini "Core Duo" 1.66 from 2006 sitting around. I also have on order a CiT 3.5 inch USB 2.0 Dual SATA HDD Enclosure and was thinking of getting a WD Green 4TB Desktop Internal SATA ...
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42 views

How to use iostat with AppleRAID volume?

When I try iostat disk5, I get the error: iostat: could not record 'disk5' for monitoring Iostat works with my other drives, and with the individual disks which make up the RAID volume. How can ...
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30 views

Can I enlarge a RAID10 with Disk Utility?

I have a 4TB RAID10 (4x2TB disks) created with Disk Utility. I also have 4x4TB spare disks. Can I enlarge the RAID10 to 8TB (4x4TB)? This post suggests that I can break each mirrored set, and ...
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132 views

Can I run two non-thunderbolt displays from a thunderbolt RAID device?

It seems like this question has been asked a million times, but after a few hours of reading similar questions, I have not been able to find a clear answer. I have a mid-2012 Macbook Air running OS X ...
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1answer
62 views

Setting Up Raid iMac

I have one lacie 2big thunderbolt 4th unit setup as raid 1. I want to add a lacie 2big thunderbolt 4th unit. How do I get it set up so the entire unit 1 is mirrored onto unit 2(Raid1)?
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252 views

Recoverability with HFS Plus following removal of a disk from RAID 0 hardware or software

A theoretical question (I do not have spare hardware to test for this). Scenarios If RAID 0 is used (no redundancy of data) with HFS Plus, and if a disk within the array is disconnected for a while ...
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149 views

Should I use raid 0 with my optibay drive?

I installed a 120gb SSD today. My optibay currently holds my MBP stock drive (5400 RPM HD 320GB). Since they have different memory sizes, should I put them in raid 0? The only reason why I want raid 0 ...
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124 views

Could two WD Passport Ultra 1TB drives be used in the OWC Mercury Elite Pro Dual mini enclosure as RAID 1?

I'm thinking of buying one more WD Passport Ultra 1TB (I have one already) so that in the near future I could disassemble the two Passports and install the 1TB drives into the OWC Mercury Elite Pro ...
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2answers
351 views

Make SCSI Appear as Internal Hard Drive

I have the HighPoint RocketRAID 2720SGL Raid card running on my Mac and it shows as an external drive. I would like to make it appear as an internal drive. Is this possible? From: To: Here ...
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155 views

OS X software RAID 0 with 6x SATA SSD?

I will be able to use a former video editing "Mac Pro" :) for a bit, free to configure anything I want in software. I would like to experiment with setting up OS X software RAID 0 with 6x SATA SSD. ...
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332 views

RAID 1 with a Mac - how to avoid formatting one of the drives

I have an iMac with an external 2TB HDD. I recently bought a second 2TB HDD in order to build a RAID 1 (mirrored) with the two drives. The problem is that Disk Utility forces me to create a new RAID ...
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32 views

HP Media Vault HDD connected to macbook Pro and accessing it

Our family HP Media vault MV0000 motherboard has failed and we need to recover family pictures of our late mother. The HDD is supposedly Raid format and while we connect it to either a PC or Mac ...
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296 views

Safely destroying Apple Software RAID 1

If an Apple Software RAID (RAID 1, mirrored) exists and one of its members is failed. It is possible to destroy the RAID and keep the data on the functional disk intact? If so, how is this ...
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69 views

How do I match a disk UUID with a software RAID member?

I have one member of a stripe which is starting to fail, but hasn't yet thrown any errors that SMART can pick up on. Currently I'm getting errors like this: Aug 8 11:34:22 myhost kernel[0]: ...
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280 views

Merge two disks to RAID 0 and keep my installation

I've got two 128Gb SSDs installed in my MacBook Pro. Originally I had one for the system (named Calcium), and one for the /Users folder, symlinked into the first (named Users). As I ran out of space ...
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343 views

Use two external hard drive docks to retrieve data from RAID 0 disks

Some while ago, I fried the power supply inside of my WD MyBook Pro Edition II, leaving the disks intact but rendering the enclosure itself totally useless. So now I have two 500GB 3.5" SATA drives, ...
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95 views

Lacie Big 5 10tb to be used as external hard drive but want security so: ZFS Raidz?

I've just bought the Lacie Big 5 10th and I want to use it as an external hard drive for my files. I was thinking of making it raid1 but then I heard about ZFS and Raidz. so that I can easily ...
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391 views

RAID 1 array degraded, now not being recognized by OSX

I've got a pair of Seagate 3TB HDDs in a mirrored RAID 1 array using a Vantec NexStar MX two-drive enclosure. The setup has generally worked fine for the last four months, but lately I've noticed that ...
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92 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 ...
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655 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 ...
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175 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 ...
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527 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 ...
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65 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 ...
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1answer
298 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 ...
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2answers
2k 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 ...
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1answer
438 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 ...
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1answer
42 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 ...
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1answer
6k 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 ...
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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 ...
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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 ...
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214 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 ...
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141 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. ...
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174 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 ...
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141 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 ...
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165 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 ...