Questions tagged [raid6]
RAID6 is a method of configuring fault-tolerant hard drive storage. It is similar to RAID5, but differs in that it writes two sets of parity information, thus can survive the simultaneous failure of two hard drives.
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Upgrade from SATA to SAS: Expected speedup?
My current setup is this:
Megaraid 9361-16i
12 x 12 TB SATA disks WD DC HC520
Connected to the controller via 3 of the 4 SAS ports
Configured either Raid-10 or Raid-6 without spares. Raid-6 in write-...
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RAID6 REBUILD - Virtual Drive not importable
Good morning,
Last week, the heatsink of our LSI9271-8i Raid card dropped off from the card and the card is dead. It is an 8 disk x 10TB (Slot7 is hot spare) RAID6.
Well, we have another LSI9271-8i, ...
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md Raid6 array disapeered on reboot
my raid6 array disappeared on reboot after I grew it. I believe the issue was growing 2x with the full disk not partition. It has been suggested a possible other reason the drives were not correctly ...
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Why does ZFS RAIDZ2 only use 2GB of data when I create a 1GB File
I have created a ZFS RAIDZ2 / Raid 6 file system, which from what I believe will store parity on 2 disks.
root@zfs-demo:/data# zpool status
pool: data
state: ONLINE
config:
NAME ...
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RAID 6 array, one disk rebuilding?
I have got a 10 disk (16 TB) RAID-6 array (AVAGO MegaRAID SAS 9380-8e) in a Supermicro JBOD enclosure. The controller started beeping today and one disk is blinking red/blue. I entered the AVAGO ...
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What's the difference between a "degraded" RAID 6 array and a "clean" RAID 5 array?
Suppose you have two RAID arrays, one with N disks and one with N+1 disks. The array with N disks was formatted as a RAID 5 and left alone, while the other array was formatted as a RAID 6 before one ...
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Need to recover RAID 6 array
By definition
RAID 6 is an array of independent hard drives equipped with two
independent and distributed checksum schemes
Does that mean I can recover each of the hard drives one by one using ...
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I accidently deleted the partition tables of my RAID6 drives
I accidentally deleted the partition table of 2 drives in my 4 drive RAID6 by reversing the order of sudo sgdisk -R=/dev/sdb /dev/sdz
parted /dev/sdb print currently reports:
Model: ATA ST2000DM008-...
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How do I expand my VD on LSI 9361-16i?
I've got a 9361-16I installed in a supermicro sc847. I have the 2 expanders running in a cascaded configuration with both of them chaining off port 0-4 of the card. They are being exposed as enclosure ...
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Need confirmation on how iSCSI RAID storage works
I have a Dell PowerEdge server with Windows Server 2019 that has an iSCSI target set up with 30 iSCSI LUNs. The HDDs are set up in a RAID-6. I have some IP cameras that have the ability to record ...
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16 drive RAID recommendation on H730P
I have a machine with 16 x 12 TB drives on an H730P controller. What would be the recommended RAID-6 configuration? The drives are of the model Toshiba MG07SCA12TEY
I am considering 2x 8 drive arrays, ...
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Is RAID 6 a good choice regarding performance on server used for computation?
We are operating a server for doing computations with large data sets (100GB - 5TB) for a small group of researchers (10-20 people). At the moment we are running 4x8TB spinning drives in a RAID 6 ...
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Issue expanding raid6 array using storcli
I've got a RAID 930-16i 4GB RAID card.
I started originally with a single vd comprising of 4 x SSDs in RAID6
-------------------------------------------------------------
DG/VD TYPE State Access ...
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Windows Storage Spaces - a useful replacement for RAID6?
// short update at the bottom
// another update is near the bottom to reply to a suggested edit
So, at first I had this idea: Find a virtual driver to set up and use software raid on windows. Result: ...
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Adding an Uncofigured Good drive to an existing drivegroup/RAID setup
I have a machine with a few drives in it. Running storcli /c0 show produces this relevant info, et.al.:
TOPOLOGY :
========
----------------------------------------------------------------------------
...
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How is the HPE SSA "remove drives" command supposed to work to shrink an array?
I have an HPE ProLiant DL380 Gen9 Server with 15 internal 8TB SAS LFF drives, in a RAID6 configuration through an HP Smart Array P840ar controller. It contains a single 94.6 TB Logical Drive [Size: ...
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What would you call this "RAID" ? RAID 1+6? [closed]
I have Snapraid running as snapshot RAID6 (2-parity disks) for my 9 disk array which calculates new parity once a day. Then I have Drivepool duplicating certain very important folders on the array to ...
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How to Add Another Physical Drive to Adaptec maxView RAID6 Logical Drive
I have an ASR71605. I've added another drive to the controller which shows up in max view as ready. The logical drive is RAID 6 with 5 drives in it now. I'm adding this additional drive which is ...
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HP Smart Array P812 - Why is my Raid 60 gone?
I've got an HP ProLiant DL380 Gen7 with a Smart Array P812 which is connected to an MSA20 that houses 19 600GB drives.
After my VMs didn't boot up, I checked my array config and 2 drives failed:
=&...
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RAID-6 write I/O degrades over time
I've setup a Linux system with RAID-6. Sequential write I/O performance is initially around 600 MiB/s after a reboot, but degrades to between 0.5 MiB/s and 2 MiB/s after the system has been used for a ...
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Upgrading RAID6 drives with larger capacity (Best practices)
I have been tasked with upgrading an existing RAID6 array with new disks. Currently we have a 6 disk setup with 1 hot-swap. This is inside a Dell R340 with a PERC H730 Mini controller. I have not been ...
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How can I find a broken disc?
I have a problem. I got 1 broken disc in RAID6. How can I find which one broke down?
I've tried
# cat /proc/mdstat <--- to check condition of raid.
I want to know if this command
mdadm –...
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How to recover mdadm raid6 array? mount: can't read superblock. 8/13 drives show all drives present, 5/13 drives show only 5 drives present
I rebooted my server today to find it hanging. I commented out the entry in fstab that loads /dev/md0 and the machine proceeded to boot. The raid was accessible and working prior to the reboot, I only ...
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Ceph - Erasure Coded Pools - Always get inactive pgs
I'm trying to achieve similar thing to raid6 on ceph.
But When I'm creating erasure coded pools (k=3 + m=2(or k=4) ) I always get inactive pgs.
ceph health details are:
HEALTH_WARN Reduced data ...
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Extend root partition for XenServer 7
The situation: We have a 6 disk RAID6 array in our server. We forgot to keep a bigger space for the root partition and used up all remaining space. Now, if we extent the array with +1 disk and ...
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Expanding Perc 6/E Raid 6 while in use - Can this cause data loss?
There seems to be a lot of information on the 6/i controller but not 6/E. The Dell manual has bit of information on converting from one raid level to another but it does not specifically answer my ...
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(Why) Does lvmraid6 need 5 drives?
I'm investigating using LVMRAID instead of MD+LVM. In my case, I'm looking at a RAID6.
As expected, the docs say you need N+1 devices for RAID5, and a minimum of 3 drives.
The docs say for RAID 6 ...
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Windows Server 2012/2016 simulated RAID6 in software with 4 disks
Does anyone know how to emulate RAID6 in software on Windows server using 4 disks? The solution must provide for the failure of any two disks (like RAID-6 in Linux).
Thank you,
Joe
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Can I make an Active Spare disk permanent?
We have a ProLiant ML350P Gen8 server with a P420 controller running ESXi 5.5.
It has a RAID 6 array using 7 disks. One of the disks got marked as Predictive Failure, and in response to this we ...
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RAID6 failed instantly and switched to RAID0 - any chance to rescue?
I´m running a server ob Ubuntu 16.04. Data storage on this system uses a lvm on top of a software raid 6 whereas the os is installed on a separate raid 1 with lvm.
The raid 6 is built up of 7 ...
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XFS very slow on LVMed Raid 6
i have a new storage server with 6 x 8TB WD Red HDDs. They build a RAID 6 with mdadm and a chunk size of 256k. On top of that mdraid i have LVM which then holds the different filesystems.
Initially i ...
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QNap Nas-Finding drive order for Raid 6
I have a Qnap 10 bay Nas that had two separate raid setups in it. I know that the Raid6 ran from left to right 1~5 slots, and then the Raid5 ran from slots 6~8. They both had hot spare drives in slot ...
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Optimal RAID 6+0 Setup for 40+ 4TB Disks
I am setting up a JBOD containing 44 4TB 7200 RPM SAS HDs. I chose RAID 60 as I prefer drive failure protection over the performance improvements offered by RAID 10. My issue is how to choose the ...
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What could go wrong with ext4 on LVM on a hardware RAID6?
Intro
Recently one of my systems using ext4 on LVM on hardware RAID6 experienced a disastrous failure. To name some of the disasters: several filesystems failed beyond repair, at least one was ...
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RAID6 resync with fast writes but slow reads
I'm using Debian Jessie.
# uname -a
Linux host 4.9.0-0.bpo.3-amd64 #1 SMP Debian 4.9.30-2+deb9u5~bpo8+1 (2017-09-28) x86_64 GNU/Linux
And have setup a RAID6.
# cat /proc/mdstat
Personalities : [...
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RAID 6 array much faster than my RAID 10 array?
How come my RAID-6 outperforms my RAID-10?
Docker container on Synology with 8x4TB RAID-10:
[root@centos Files]# bonnie++ -d /Files/tmp -r 16G -s 32G -n 1 -f -b -u root
Using uid:0, gid:0.
Writing ...
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grwoing raid 6 using mdadm failed - how to undo?
so I have a raid 6 array in my server.
Until yesterday, it comprised 11 devices each the size of 1TB.
These devices have been running in a raid 6 array.
Yesterday i tried to extend the array:
Added ...
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RAID 6, 2 disk fail, while third was rebuilding
I have Infortrend DS S16E-G2152-6 NAS, 16 4TB drives (WD4000FYYZ) in RAID 6. Last week one drive failed, was replaced and was rebuilding. At around 80% of rebuild, another two drives failed ...
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mdadm reshape raid6 does not start
Trying to make myself familiar with some of the raid management options before using the actual devices. So I am working with a few small partitions on a USB-stick.
The goal is to extend an existing ...
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After creating RAID6 unit mkfs.xfs takes forever
We have a computing cluster with a relatively large storage system with RAID-6.
The are 22 disks in this unit and each disk is 3TB (almost 20*3=60 TB). Recently many of the drives failed and rebuild ...
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Poweredge R715 with H700 & SATA drives
I am taking a class that is all about configuring and deploying physical & virtual servers. So as to be able to do this more readily I bought a bare-bones Dell Poweredge R715, 2 Opteron 6276s, ...
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Setting up RAID monitoring on Hetzner server
We are using Hetzner server for our application which is build in Elixir Phoenix. when I do lspci | grep RAID then the results are
02:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID ...
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Linux mdraid RAID 6, disks drop out randomly every few days
I have some servers that run Debian 8 with 8x800GB SSD configured as RAID6. All disks are connected to a LSI-3008 flashed to IT mode. In each server I also have a 2-disk pair as RAID1 for the OS.
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How to create degraded raid6 array using megacli
There is a server with few disks. And - a new server with PERC controller.
I would like to migrate existing data into a new server to raid6 which uses 6 disks(4+2).
Unfortunly - i don't have enought ...
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Which raid array will be best practices with seven 1.2 tb hdd system
I have a server which have seven 1.2 tb hard disks. I have to create raid array but i don't decide which raid i use?
First of all, first and most important matter is security. At any cost i must not ...
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Does Windows Server Storage Server have problems with RAID6 iSCSI?
I adopted a virtual Windows Server 2012 Storage Server that has 4 QNAPs attached via iSCSI.
The storage environment is connected via iSCSI through a Cisco SG300 (Gigabit); jumbo frames is not ...
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Is it possible to ask ReFS to use hardware RAID6 for parity calculations?
Does ReFS use FPGA-based XOR engines for RAID parity calculations? If not, is it possible to get it to use such tech?
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recover original file system from raid6 iso's
I started with 5 drives. 1 has failed (i.e. fails to communicate anything) and 2 more are returning read errors.
My plan is to use ddrescue to store the 4 working drives to iso files.
After this I ...
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Recovering an RAID6 using ddrescue. mdadm: failed to add, invalid argument
I had 3 drives fail in a matter of a week on a RAID6. Luckily, one drive seemed to be mostly fine. I was able to run ddrescue and it copied all but one small area (couldn't read 14MB out of 3TB).
...
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Advice for creating CentOS mdadm software RAID6
EDIT: Solutions to my issue are below
I want to create a well optimized RAID6 array with mdadm with an XFS partition on a CentOS system. It'll involve ten ST3000DM001 Seagate 3TB drives and I'll be ...
