A type of RAID redundancy that includes parity data spread across a number of member disks

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Raid 5 rebuild bigger hd

we have a Avago (3ware) 9550sx raid controller we upgrade 5 HD from 500gb to 2tb ,raid 5 , rebuild the raid 1 by 1 all is working but we can not use or see the extra space . its on DPM server ...
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12 views

RAID 5/10 setup

I am trying to setup a personal media server. I am thinking of working with RAID 5 or 10 ( I haven't decided yet). So my questions are What would be a recommended RAID setup? I don't need anything ...
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63 views

Cannot Use Unallocated Space

I have a Dell T7600 workstation with four 1.82 TB drives in a RAID 5 configuration. Here is a diagram from MegaRAID storage manager: Given space for parity, this leaves me with approximately 5.5 TB ...
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37 views

How is Data Recovered when a RAID array fails

I am thinking of using hardware RAID (levels 5 and 10) on my computers. What I don't get is how is data recovered when something goes bad and the RAID array fails (RAID Card problem or anything else). ...
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213 views

How to setup RAID 5 in Windows 7

How do I setup RAID 5 for Windows 7? I tried it before without success. Is there third -party software or something that's required? When I try to click on RAID 5:
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3answers
58 views

Can I remove a drive from a rebuilding RAID 5 system?

I want to know if I have a RAID 5 system that had a failed drive, I replaced it with the wrong drive and it started to rebuild. I need to know if I can pull that drive while it is rebuilding and ...
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2answers
21 views

Replacing each drive in a RAID 5 array

I have a RAID 5 setup and I want to replace the drives with bigger drives. I do not have an external drive big to make a backup, which rules out the traditional 1) Backup. 2) All new drives. 3) ...
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26 views

RAID 5 showing two disks in same slot

We recently had a power failure for a few hours and when the power came back both my RAID arrays failed. The one I am trying to fix is a RAID5 with 5 disks (I also have a RAID1 with 2 disks, but I ...
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59 views

Recover mdadm raid5 with XFS

I am trying to recover data from an old Buffalo Terastation that failed. A previous attempt to recover the data by someone else was unsuccesful and I have been left with the following situation. NB: ...
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1answer
50 views

Transfer RAID drives from one NAS to another?

My Patriot Javelin S4 NAS is pretty slow. I’m thinking about getting a new one, but I have about 7TB of data spread out across four 3TB drives in RAID 5 format. I don’t want to have to buy more hard ...
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1answer
167 views

How to find and delete corrupted files to avoid backing them up

The Problem I have a broken Windows Server software RAID-5 array that I would like to backup, but I want to avoid backing up all the broken files. I'd really love for there to be some kind of script ...
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57 views

RAID 5 Home use?

I am looking at building a home computer in the near future. This PC will be used for video capture/editing, gaming, and will be running a fairly advanced set of hardware. My question is: Should I run ...
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1answer
139 views

Can Intel RST in RAID5 configuration be used for Windows boot drive?

I'm planning to build a new computer, motherboard will be based on X99 chipset. I'd like to set up 4 SSDs in RAID5 configuration, and use that volume for Windows boot. Is it possible now? Can I ...
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2answers
152 views

Raid mode 5+ has collapsed on my Mediasonic HFR2-ASU3S2, how to get data back?

I have this: Mediasonic HFR2-ASU3S2 I set it up with 4x 4tb drives that were meant for NAS, all WD drives. Now when I plug in the Mediasonic HFR2-ASU3S2 I get a warning pop up asking me if I want to ...
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1answer
197 views

Repair btrfs RAID? Error: Inappropriate ioctl for device

I have a RAID5 btrfs with 8 disks and a hard disk died and just disappeared from the list. Now I tried removing it but got an error: ERROR: error removing the device '/dev/sdb' - Inappropriate ioctl ...
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1answer
85 views

No extents were found for the plex, when setting up Soft RAID 1 with RAID 5 on Windows Server 2012

I did find a similar question on this, but it did not really answer my question or fix the problem, so i'm starting up a new questions on it. This is my setup now: You can see if i have RAID 5 ...
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1answer
930 views

QNAP TS 410, is it rebuilding RAID?

The QNAP TS-410 had a failed disk the other day and went into degrade mode. So I bought a new disk. Former disks were Seagate, but I bought a Western Digital now which it approved by QNAP in its ...
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173 views

How to make a cheap and speedy RAID 5 drive without case

I'd like to turn my several (four or five) old 80GB SATA hard drives into a RAID 5 drive. 4 to 5 bay NAS cases can be about $300. But I should not need one. What would it take to essentially build ...
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85 views

I can't access my LVM partition after RAID recovery

I need help after an accident with my RAID 5. I recreated it with: mdadm --verbose --create /dev/md2 --level=5 --chunk=64 --raid-devices=4 /dev/sdb4 /dev/sda4 /dev/sdd4 missing My array seems to ...
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1answer
62 views

Recovering data on 20TB RAID 5 NAS, overwritten by 500gb RAID 1

I have a Linux gateway with 2 500gb drives in software RAID 1 for system. /dev/sda = RAID 1 /dev/sdb = RAID 1 /dev/sdc = RAID 5 (NAS 12 drives iSCSI, /home directories) While replacing sdb, weird ...
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50 views

Degraded RAID 5 array, can't add replacement drive

So I've had two drives that have been marked as faulty spares in my RAID, I've removed them then I tried to --force assemble the RAID but this came up - mdadm: /dev/md0 assembled from 2 drives and 1 ...
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251 views

ZFS (RAID-Z1) or “hardware” (RAID 5) on Linux system?

I have never put together a RAID array before, but i think i understand the concepts behind most raid types from my reading. Ordering three 3TB drives (WD red) to use in a xeon e3-1231 v3, 16GB ...
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1answer
20 views

re-assemble out-of-date raid5?

I need help with my raid5 after it crashed through bad sectors. Previously I could re-assemble it with # mdadm --assemble --force -v /dev/md0 /dev/sde1 /dev/sdf1 /dev/sdg1 /dev/sdh1 /dev/sdi1 but ...
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116 views

RAID to handle 800 random blocks per second

This is a homework. We are supposed to pick HDD, imagine we are buidling RAID to handle 800 random blocks per second (550 reads/250 writes). I have picked RAID5 made out of 3 HDDs. But it is too ...
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1answer
36 views

How to configure RAID 5 with different size drives?

If I have 3 different drives, for example 10GB, 20GB and 30GB. I would like to configure RAID 5. What would be the size of data disk and parity disk in the array?
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54 views

RAID5 active device failed during reconstruction

I have this Linux RAID5 array with 4 2TB harddisks, with 3 active device and one spare, giving me a total disk size of around 6TB. Recently one drive (sdd) is starting to give me some SMART errors, ...
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20 views

Trucrypt volume on Raid5

I have a NAS with the system disk on SSD and 8 HDD's in a RAID5 configuration (using an IBM5015 card). The RAID5 volume is encrypted using truecrypt. What happens if the computer dies ? My raid card ...
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66 views

Windows not loading after 1 RAID-5 disk failed

I left my PC turned off for just over a week while I was away. When I turned it back on it said my RAID-5 status was degraded and Windows did not want to load. I replaced the faulty disk and set it ...
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1answer
433 views

Setting up a home shared RAID storage on a desktop Win7 computer

I have a desktop computer running Windows 7 Ultimate. We are several at home to use that computer, mainly to watch movies, listen music, store (hundreds of thousands) pictures of family events through ...
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49 views

hard drives - what is stripe group size given stripe unit size?

If I know a hard drive's stripe unit size is 16 KB, am I able to calculate the stripe group size? For example, is it 4 times 16 as a rule, or does the group size simply need to be some multiple of 16 ...
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1answer
742 views

Is it safe to stop a RAID 5 expansion?

I'm having some issues expanding a RAID 5 array on a Synology DS413. The drive has gone from 3 x 3TB WD Green drives to 4 x 3TB. I started an expansion operation and it's been stuck at about 60% and ...
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500 views

MDADM says can't assemble RAID5 because missing disks but all disks are there

To start this, I installed a SATA expansion card so I could get more Drives into the computer. I moved the RAID to the expansion card, after attempts failed to get the OS SSD onto them. There was a ...
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87 views

How can I re-establish my RAID5 Array (Intel Rapid Storage)?

I had a RAID 5 array, but two of the drives dropped from the array. (While troubleshooting another issue ASUS suggested I update my MoBo BIOS, but neglected to tell me this would corrupt my RAID ...
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105 views

Migrate Windows Server 2003 to Windows Server 2012 with Raid 5

What should i consider when migrating from Windows Server 2003 to Windows Server 2012. I have a raid 5 configuration, so i don't want to lose any data (+/- 6 TB)
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254 views

How do I fix an ntfs filesystem on a RAID5 volume?

I have a RAID5 volume with an ntfs filesystem of which chkdsk keeps telling me there are 5 unindexed files. I can't take the volume offline during the workday, so I run chkdsk /f on it, and then say ...
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213 views

windows server 2012 span multiple raid 5 arrays

I have some old hard disks that I want to get as much out of them as possible for space. Currently, I have: 2 x 200 GB HDD 2 x 500 GB HDD 2 x 1.0 TB HDD 1 x 1.5 TB HDD If I combine them as ...
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57 views

OCZ Vertex 4 64 GB timeouts on Areca 1880IX-16-4G

I use 3x OCZ Vertex 4 64 GB in RAID5. If they work then it's all ok, but suddenly random drives are dropped from array with timeout errors. Sometimes even two of them which causes filesystem errors. ...
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343 views

Is it possible to convert a btrfs RAID5 to a RAID6 with the same disks without losing data?

How would I convert an existing RAID5 (single parity) btrfs setup to a dual parity RAID6 configuration given enough free available disk space, using the same disks, without swapping out data ? ...
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1answer
48 views

Format system and preserve RAID

I have a system on an SSD, and beside that, a set of 4 disks are connected over software RAID 5. I have a problem with that system now and I'd like to format that system and install a new one. If I ...
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12k views

Ubuntu Server 14.04 - RAID5 created with mdadm disappears after reboot

This is my first question on superuser, so if I forgot to mention something, please ask. I'm trying to set up a home server which will be used as file server and media server. I installed Ubuntu ...
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3k views

RAID5 vs RAID4 purpose of floating parity

I still did not get why is RAID5 better than RAID4. I understand both computes parity bits that are used for recovering if some failure occurs, the only difference is in storing those parity bits. I ...
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131 views

Is it safe to transfer files to a raid 5 array while it is re-synching?

I have a newly created raid 5 array in windows server 2008 (software in windows disk mamanger) and it is resynching... Is it safe for me to start transfering/copy files to the volume while it is ...
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1answer
164 views

Setting up a RAID 5 Array

I am currently trying to convert my drives from just a bunch of external disks, each one individually shared from my (CentOS) server into a RAID array (ideally, RAID 5). At current, my drives are: ...
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RAID 5 Goofy Partitions

My apologies if this is a stupid question. Hopefully the answer is stupid too. Brand new Windows Server 2012 with RAID 5. Everything is properly configured and installed, running great... I think. ...
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2k views

In a RAID 5 disk array, does recovering a drive increase chance of another drive failing?

If you have a basic RAID 5 array of 3 or more hard drives, and one fails, does this increase the chance of one of the other drives failing and making the full recovery impossible? If every one of the ...
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474 views

Is Btrfs vulnerable to RAID write hole effect?

If not, does it mean that Btrfs in RAID mode is fully resistant to power failure?
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725 views

Secure a server - Raid-5 encrypted with BitLocker? [closed]

I look after a small office, and when I say small I mean SMALL. The have a 2008R2 Windows Server running a domain and shares for about 10 people. They handle some pretty sensitive information so ...
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230 views

Raid5 reconstruction is extremely slow

Three days ago added another drive to my RAID5 array with 3 drives, each drive is 4TB. Since then than only 42% has been completed MegaCli64 -LDRecon ShowProg L0 -a0 ...
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170 views

Pegasus R6 - No Physical drive in the Enclosure

I have a Pegasus R6 (an external thunderbolt connected RAID array). I am trying reactivate 2 "dead" drives with the help of a shell and the command PromiseUtil. Phydrv -a list gives the message: No ...
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1k views

Assembling an mdadm array with “possibly out of date” disks

I've recently moved house and have had some power problems after switching on my file server that's using a mdadm RAID5 set up. The file system I'm using is ext4. It seems that at some point two (of ...