Questions tagged [raid]

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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23 views

Adding a new hard drive to RAID1 software RAID fails

I've got a Mac Pro 1.1 running macOS Server 10.6.8 that I want to use as a RAID-Server. I use Disk Utility to run a RAID1 set with two 500GB hard drives. Now adding a third 500GB hard drive to the ...
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Can a RAID be a Time Machine backup?

If I configure a large external drive as a RAID, can TimeMachine use it for backups? I see it can use a Drobo, but can it use even a "home-brewed" RAID?
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47 views

Computer Froze, Now Raid over iSCSI (APFS Format) is no longer mountable. GPT/MBR not present

I was exporting video in Premiere and the computer froze so I had to restart. Upon restarting, I noticed the raid drive I connect to over iSCSI was not showing up on my desktop. However, it appeared ...
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Check files on both HDDs on RAID 1 array

I just set up my LaCie 2big Thunderbolt as RAID 1 array. Is there a way I can look at both HDDs to confirm, that all my data is actually mirrored?
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Manually mount a RAID 1 set - 2 of 2 drives are Online but Disk Utility cannot mount, set name is not displayed

Overview: WD My Book Thunderbolt with 2x WD 4TB drives (factory-fitted), connected to 2014 iMac (macOS Sierra 10.12.6) via Thunderbolt 2 port. Drives are configured as RAID 1. Both drives are listed ...
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1answer
47 views

Move SoftRAID to a new home

We have 3x4TB 3.5" HD's in RAID 5 (SoftRAID) in a 2012 MacPro tower. Is it possible to physically remove them and insert them into a larger enclosure and it will continue operating?
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351 views

How to repair Raid 0 Via Terminal

I have 2 @ 4TB drives in an 8tb Raid 0 stripe enclosure that has become corrupted. I have tried to repair the volume via, disk utility, terminal and single user mode with no luck. All 3rd party ...
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98 views

Errors when reseting external drive permissions on High Sierra

I have an external RAID array with several disks. I am unable to reset permissions. For example: sudo resetUserPermissions /Volumes/Data/ `id -u` returns: Ready to reset user permissions on disk5 ...
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1answer
282 views

Recovering a RAID 0 volume

In the process of upgrading a 2 4tb disk RAID 0 array from an iffy LaCie drive to a faster/more reliable USB enclosure I have lost data. The backups take a long, long time to restore so I'm hoping to ...
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How to suppress warning about unreadable disks?

I have a dual boot machine, High Sierra and Windows 10. I have 4 disks in a software RAID created in Windows. Every time I boot macOS, it warns me that these disks are unreadable and must be ...
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3k views

Mojave and RAID

Does anyone know if Mojave will support booting from RAID drives? My MacPro 5,1 has RAID hard drives and two striped SSD's that boot into Sierra. I've been unable to update to High Sierra on this ...
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1answer
278 views

How can a Mac split a single backup to two independent, external drives

I have been asked to perform an emergency backup of a device showing signs of HDD failure. I'm being provided with two individual external hard drives to accomplish this. Each drive is independently ...
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180 views

Mac Pro 5.1 (mid 2012 ) Fusion Drive (2 SSDs and 1 HDD)

I have 2 SSDs 160GB each and a 4TB Disk (all SATA) I was thinking to put them in Fusion Drive setup, will it work? how it will work? which setup is recommended if possible? any speed benefits? ...
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1answer
3k views

Terminal command to force-install Mac OS High Sierra onto a specified drive?

I'm wondering if there is a way to install Mac OS High Sierra using terminal onto a specified drive? I'm working with a bit of a unique situation as I've been running Mac OS Sierra successfully in a ...
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66 views

Possible to mount a RAID1 pair over USB?

I have a pair of disks which I configured as RAID1 (mirrored) via Disk Utility on my Hackintosh. I am now traveling, and took the disks with me, and want to mount them with my MacBook Pro using a USB ...
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1answer
623 views

How to create exFAT or NTFS RAID 1

I am looking for a way to create a RAID 1 Volume from macOS Sierra with a format that will be readable from both Mac and Linux. Using DiskUtility I can not seem to find a way to format the RAID in ...
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1answer
215 views

RAID array creation in macOS

I have a LaCie 2big Thunderbolt 3 RAID drive. I'm currently using LaCie RAID Manager software to create RAID array. I noticed that MacOS is recognizing the RAID volume as an external drive instead ...
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1answer
404 views

Time Machine restore stuck on “Preparing <destination disk>” for more than 24 hours, how can I diagnose the nature of the problem?

Recently I got myself into quite a pickle that eventually required I format my Mac’s dual-SSD RAID-0 array and restore from a Time Machine backup. Unfortunately Time Machine has spent the past 24 ...
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3k views

APFS on RAID: recommended course of action?

I recently upgraded my Mac Mini Server's dual SSDs and found myself needing to re-create the RAID-0 array from scratch. (I am running the mainline High Sierra 10.13.1 on a 6,2 MacMiniServer from 2012.)...
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4answers
115 views

How would I architecture Network Attached Storage?

This is a sequel (1, 2) question. I'm interested in setting up a home networking solution. One or more individuals would be able to access their accounts from any one of multiple Macs around the ...
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93 views

Create a RAID 1 with only one disk?

I have a MacBook with an SSD, so space is limited. I've been using a single external drive to store my overflow, but would feel a lot more comfortable if it was on a RAID 1. So, I've bought an 2 bay ...
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2k views

Is it possible to run OpenZFS on MacOS Sierra on a Mac Pro

I have a Mac Pro with a PCIe flash startup drive running MacOS Sierra. I would like to fill the 4 empty SATA HDD bays with drives and use OpenZFS to create a pool/volume. Is this configuration ...
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129 views

I can not explain my disk usage

I have a RAID 5 solution with 4 disks of 2TB. That gives me 6TB disk space. Now Disk Utility tells me that my actual usage is 3,5TB and I have 2.5TB free space. But when I add up the disk usage of the ...
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1answer
372 views

Time Capsule & 3TB HDD Raid 1 setup

I have the Airport Time Capsule (3TB) connected to a 3TB HDD via the Airport Time Capsule's USB2 port. How can I set them up with RAID 1?
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1k views

How to Delete Drive That is Missing From a RAID

I had a RAID drive fail. I replaced the bad drive with a new one and, after some work, got it up and running. I want to delete the bad drive from the config. This is the latest listing: AppleRAID ...
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185 views

Moving or creating Recovery Disk with dual internal SSD with RAID

I have removed my optical drive and installed a second SSD in its place. To do this I partitioned the first SSD to hold macOS Sierra. The other partition was RAID0 with a second SSD. I seem to have ...
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1answer
334 views

How to get data on HW RAID 5 without initializing disk? RocketRAID eSATA connection died but USB3 works and shows RAID5 OK?

What the pluck moment with my hardware RAID: eSATA connection to my SansDigital external 5-bay tower stopped working, not sure why, card definitely warm. Shut everything down, disconnected the eSATA ...
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173 views

How can a raid set be renamed

I wasn't paying attention, and now I have a raid with a name similar to that of the boot partition. I'd like to name rename the raid set to a name that reflects the partition name. E.g. If the file ...
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125 views

For a Western Digital Duo, what's the difference between creating a RAID using WD Drive Utilities vs. OS X (diskutil)?

For a Western Digital Duo drive, is there a major difference between the two? OS X Disk Utility doesn't have the RAID feature now, but OS X can still create RAIDs via the command line and diskutil. WD ...
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2answers
564 views

Swapping HDD RAID 1 with SSD in Mac Mini

I have a Mid 2011 Mac mini with 2x 500G HDD configured as RAID 1. Recently one of the HDD died. I planned to replace the dead HDD with a 500G SSD, and let the RAID 1 rebuild Is this a viable ...
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63 views

Mac Pro going to sleep when rebuilding RAID array

I have a Mac Pro which is going to sleep during a RAID array rebuild. The disks are spinning down during the sleep, so I worry that the array will either not successfully build, or will require ...
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209 views

howto encrypt “WD My Passport Pro” online? support.wdc.com with dangerous solution (no security)

I wish to encrypt my WD My Passport Pro drive. I receive error With Google I found An error message occurs when attempting to create an encrypted backup on a My Book Thunderbolt Duo in the Mac OSX ...
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98 views

Are there tweaks in Time Machine or VirtualBox by Oracle to make Time Machine better handle small files within a .vdi?

Within a very important VirtualBox, which was at the time approximately 400 Gigabytes, Time Machine is not backing many files inside this machine, for even several months, despite them being changed ...
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533 views

Mac Pro APPLE RAID volume questions

My Mac Pro 4.1 (circa 2009) has a MacPro Raid Card and the software shows two storage volumes - one 1TB SAS disk and one 2 TB SAS RAID volume. The removal of the Parallels volume leaves me with the ...
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How do I remove everything Parallels?

Background: Mac Pro 4.1 circa 2009, specs: OS X El Capitan Version 10.11.3 (just updated last weekend) SN - H09440CK20H 2 - 2.93 GHz Quad-core Intel Xenon processors 32 GB RAM 2 - 1 TB HD 1 - ...
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2answers
840 views

RAID 0 setup does not contain full disk space from slices

I just setup a striped RAID 0 on my 2012 MacBook Pro with two SSDs. One drive is 256 GB and the other is 500 GB, but my RAID disk is only 510 GB. Disk2 is my RAID disk, with disk0 and disk1 being ...
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47 views

Running OS off RAIDed drive?

I recently asked about bottlenecks in the Mac architecture (The Mac Pro 12 core 2010 model) to try to create a set up that optimizes performance. It was my intention to take 2 SSDs and RAID them on ...
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432 views

Is RAID1 volume usable while rebuilding RAID after disk failure?

One disk of my 2-disk-RAID1-stack has failed and I'm about to replace it. Is the volume usable—i.e. can I read & write just as I normally could—while Disk Utility is rebuilding the RAID?
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734 views

Does OS X's Disk Utility create hardware RAID or software RAID?

I created a mirrored RAID (RAID 1) using 2 Western Digital 2TB external hard drives before, using Disk Utility on a Mac. For this, it should be software RAID. And then I got a WD Thunderbolt Duo 6TB,...
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551 views

Best way to expand JBOD with RAID?

I currently have a Hornettek Enterprise Quad bay USB3 JBOD hooked up to a Mac Pro running Mavericks. It has two 3TB disks which are mirrored (RAID 1 using Disk Utility) and contain a mixture of ...
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354 views

Expanding Flash Storage with SDXC

I see on a Macbook Pro, you can expand your current storage space with SDHC or SDXC. Being a Linux user I know you can use RAID to expand storage with 2 disk, so storage looks like 1 HD. However, most ...
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1k views

Simple Low-Cost Network Backup System - Drobo? Alternatives?

I'm hoping to graduate from manually copying important files to multiple external desk or portable drives; affordably. We have 3 Macs and an iPad or two. I have just now learned about Drobo, who as I ...
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67 views

Continuous volume shows too much available space

I have a continuous volume of two identical SSD drives. 2 terabytes, 1.92 terabytes in practice. I plugged it in via USB today and finder and disk utility show that all the space is available. 1.92TB....
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350 views

Backing up a RAID experiencing I/O issues

I recently began working for a company that has an OS X Server with a PROMISE Pegasus Thunderbolt RAID (RAID 5) attached as a file server. Within my first couple of days, it became apparent that users ...
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1k views

VMware ESXi compatible RAID card for the Mac Pro

I have a 2009 Mac Pro that I'd like to add a hardware RAID card to. I am running VMware ESXi with various OSes running as VMs. The Apple RAID card is not what I'm looking for. I would also like to ...
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1answer
5k views

How Do I Partition A Raid 0 Using Disk Utility?

I have just purchased a WD My Passport Pro. It comes in a striped RAID 0 configuration comprising of two 2TB drives. I want to partition the drive into 3: Photoshop Cache Lightroom Catalogue Video ...
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1answer
452 views

Are there any Hardware RAID Cards with Batteries that will work in a Mac Pro 3,1?

I'm looking to install Proxmox on my MacPro3,1 and it's suggested that if you plan to use the system for 5 years that you install a Hardware RAID card with a battery in it, so that if the power goes ...
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1answer
281 views

Restore a lost partition from degraded software mirror RAID

I used to store my valuable files on Apple software RAID (mirror). Recently one disk has failed and the mirror became degraded. I rebuilt the mirror using new drive, following this guide, but seems ...
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495 views

Apple Time Machine, Drobo and studio computer [closed]

I bought an Apple Time Machine. I have a home studio with several hard drives. I'm trying to find the best way to setup Time Machine to keep all my storage backed up all the time. Studio Computer (...
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1answer
379 views

Combining two RAIDs

I have an OSX machine which houses 2 RAIDs made of 6 disks. The 2 RAIDs contain 6TB of data; they were set up with Disk Utility: A 'safe' 4TB RAID-1 (mirror) made of 2 x 4TB disks, 3.68TB used A '...