Questions tagged [raid-5]

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

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A weird issue relate to ext4/lvm/raid-5 after partition recovery

I have 3 hard disks, in the following paragraphs named /dev/sda, /dev/sdb and /dev/sdc, newest came first. Note: /dev/sdc has one primary partition /dev/sdc1, one extended partition /dev/sd2, and 3 ...
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Personal RAID5 long run maintenance

I'm considering to build a RAID5 storage from three 8TB hard drives inside my PC being run under Windows 10 Home (if it matters). In my motherboard's manual I can see instructions how to setup RAID5 ...
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904 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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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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770 views

Restart degraded RAID array after crash

I've had to (temporary) reduce my RAID5-Array, so that there are four out of five disks available. Things getting worse as my system crashed during write process. After reboot the system wants to ...
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314 views

RAID5 + Samba Woes

I'm in the process of setting up a brand-new CentOS 6.2 server. The boot, swap and root partitions live on a 320GB SSD, and my archive files are on a 9,000 GB RAID array. Problem is that if I setup ...
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794 views

how to find bad disk in raid array?

I have a RAID5 array and one of the disks clicks whenever I start up the array. During array operation, it seems to run fine though. This has me worried that I'm going to start running into problems ...
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165 views

Where do I start diagnosing a RAID drive that won't come up?

I've had this Cavalry 4TB RAID drive connected via eSATA to a Win2003 box for a year or two, and it's not coming up any more (can't see it in Explorer, or in disk management). I've also tried ...
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37 views

Can I use three SSDs in RAID 5 with an operating system install on one of them?

I have three identical 500GB M.2 SSD's installed on my motherboard, and want to run them all in a RAID 5 array, where I would have ~1TB usable storage. I currently have Windows 10 installed and ...
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100 views

RAID 5 Windows 10 Host OS Running CentOS-Linux in VirtualBox

This is my first time using a Virtual Machine so please forgive my ignorance. My computer is running Windows 10 and then in VirtualBox I'm running CentOS. I have 3 new 1TB HDDs. I want to run the 3 ...
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79 views

Is software RAID5 or zraid1 inherently hard on drive hardware under CentOS 7 Linux?

I have had persistent issues using externally mounted hard drive arrays under CentOS 7, whether attached through a USB3 connection or eSATA, where the data format used the single redundancy in a 5 ...
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484 views

QNAP TS-419U+ Raid5 not rebuilding

I replaced the hard disk number 1 on a QNAP TS-419U + with RAID5. It is a hot-swapping replacement without turning off the machine. It was smart of the new HD is good, but it was not added to Raid 5. ...
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398 views

broken LSI raid controller: how to make a safety copy of the disks before anything else

My friend has a SuperMicro server where the RAID controller all of a sudden seems to be broken (after a shutdown, drive swap, and startup). It shows "RAID Adapter Memory Error!!! Please check the ...
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65 views

RAID 5 - Server having 5 SATA HDD of 750 GB and 1 SATA HDD of 1TB size , will this combination support for RAID 5 and will RAID 5 work?

RAID 5 Configured on IBM Server, having 6 SATA HDD of 750 GB each/7.2K. Now we have one 750GB disk failure and we have replaced it by new SATA HDD but of 1TB size/7.2K. Wanted to know will this ...
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29 views

Linux software Raid5 DegradedArray with mdadm

So I changed my case and I don't know why but one my SATA port does not work anymore. So only 5 of my 6 RAID5 disks were recognized. The volume was automounted anyway and I already wrote new files on ...
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583 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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264 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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476 views

RAID 5 Windows 10

Rev 1. - Provided Screenshot for Further Clarification. When I convert my storage drive from a basic to a dynamic disk in Windows 10, using diskpart.exe, there is one partition but no volume to go ...
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583 views

RAID 5 array degraded - Intel Matrix Storage Manager suddenly says all 4 disks are “Non-raid disks”

Long story short, I have a linux (ubuntu 10.04 LTS) server with a 4 disks configured as a 2 TB RAID 5, set up with Intel Matrix Storage Manager v8.0.0.1038 in BIOS. My power went out, and the UPS ...
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492 views

Disk utilization 100%, no read or write

Our disks on one of our servers are showing 100% utilization but no read or write. here is the output of iostat -xc 1 and errors on syslog https://gist.github.com/4110533 status info from raid card ...
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1k views

Recover data from Dynamic Disk (MBR) bigger than 2TB

Here is the situation: Promise Array FastTrak TX4310 with 3 disks (750 GB each) in RAID5. This comes to around 1500 GB of data. Last week I had the idea of expanding the RAID with an additional 750 ...
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412 views

Reading or writing with a 4 WD5000AADS drive RAID 5 array drops to 0 speed

Edit, 10/31: Crash-- complete system lockup. Booted computer, had strange lag for visiting ANY webpage in Chrome.. Figured that either a network problem existed, or Chrome could not write to disk ...
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BTRFS RAID5 disk failed while balancing

If you clicked on the link to this topic: Thank you! I have the following setup: 6x 500GB HDD-Drives1x 32GB NVME-SSD (Intel Optane) I used bcache to setup up the SSD as caching device and all ...
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What actually happens during a RAID 5 expand?

I have just started the expansion of a RAID 5 from 3x3TB to 4x3TB in a Synology. This is all very easy, a few clicks and it’s doing its thing for next few days. But, what actually happens during a ...
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I Have A Raid 5 Trouble

Hi my Raid is going crazy. I Have a Raid 5 with 4x 3TB Drives and one drive dropped out. So I popped it back in and everything worked Fine But i Had run this and noticed that the Drive was not used. ...
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850 views

Win10 Storage Spaces - Missing capacity?

I'm confused. I have a "parity" Storage Space consisting of 4 x 3 TB drives in my Win10 file server (I think "parity" is roughly equivalent to RAID5). This should give me roughly 9 TB of usable ...
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1k views

How do I format a single raid 5 hard drive?

I'd like to know how to format a single former raid 5 hard drive If I boot up without the other raid 5 drives then Windows doesn't see it; it doesn't appear in Disk Management, or whilst booted into ...
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341 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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189 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 be ...
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112 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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154 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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165 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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134 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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460 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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2k views

mdadm raid5 read error not correctable

I have a software raid5 setup existing of 4 disks. sda, sdb, sdc, sdd Since everything was up and running I wanted to test the array. To do this I pulled the plug on one of the disks (sdd). Everything ...
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294 views

What caused my RAID 5 array to become corrupt?

My machine has an Intel ICH9R RAID controller built in to the motherboard and an additional SIL3124 controller. I had two 1Tb hard disks in a RAID0 array on the Intel controller and 3 1Tb disks in a ...
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143 views

RAID 5 configuration and future expansion

I am building a PC to act as a file server among other things, and I was wondering whether it is a good idea to create 2 partitions on the RAID 5 array, one for OS one for data, or to have a separate ...
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Recovering a Microsoft Storage Space Pool RAID 5

I have a storage space pool based on 3 disks of 8TB each in a RAID 5 setup. I have accidentally quick formatted the storage space volume. Is it possible to recover the volume? I have tried many ...
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Raid 5 on a GA-970A-DS3P motherboard. Simple remove and reinsert HD

Good Evening, I've setup a colleciton of four hard drives on a Raid 5 arrengment using a GA-970A-DS3P motherboard. Just getting to know the processes and im trying a simple remove and reinsert of one ...
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Dell PERC H810 - Import foreign config with 2 drivers with SMART errors and 1 total fail?

We have a 12 drive, 40 TB storage bay that all of a sudden encountered multiple drive failures On RAID 5. One drive we have replaced outright, while another two have SMART errors. When the drives ...
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48 views

How to diagnose/fix slow file management on Windows Server 2012?

The setup is: FUJITSU PRIMERGY TX300 S7 RAID Ctrl SAS 6g 5/6 512mb (d2616) Windows Server 2012 64 bit Volume C: RAID 1 (2 HDDs) Volume D: RAID 5 (8 HDDs) The problem is: When we do ...
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48 views

restore mdadm raid5 after 2 of 3 disks have been reformated with xfs

I have a 3 disk raid 5 where 2 disks have been accidentally formatted with the xfs file system. The disks are partitioned into 6 partitions - sd[a,b,c][1-6] The disks were present in a Buffalo ...
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49 views

I am obliged to format to build a Raid 5 array?

I have four identical Western Digital Elements 2TB which are all about 70 to 85% full. I would like to create a RAID 5 array by removing all the hard drives from the external boxes and by putting ...
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274 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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601 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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199 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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374 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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438 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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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. I'...
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1k views

Unreadable sectors reported by smartd, is it serious?

I have a RAID 5 array of 4 disks. In the last 2 days I began to see these messages in the log: Jun 13 23:01:05 localhost smartd[4537]: Device: /dev/sda [SAT], 1 Currently unreadable (pending) sectors ...