Questions tagged [raid5]
RAID (redundant array of independent disks, originally redundant array of inexpensive disks[1][2]) is a storage technology that combines multiple disk drive components into a logical unit. Data is distributed across the drives in one of several ways called "RAID levels", depending on what level of redundancy and performance (via parallel communication) is required. RAID 5 is a specific implementation.
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Restore 4-Drive RAID5 array after accidentally reinitializing last 2-Drive as RAID0
I have an Asustor NAS with RAID 5 4-Drive running, after system update it reboot into the initialize page in web console, I think it's part of the upgrade process so I started the initialize progress, ...
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Problems converting a raid1 to raid5
I had a clean raid1 which I tried to convert to a raid5 following this procedure:
https://dev.to/csgeek/converting-raid-1-to-raid-5-on-linux-file-systems-k73
After the step:
mdadm --create /dev/md0 --...
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Can I restore my HP array after 2 disks replacement?
I have HP array with 12 disk each on 2 TB. I configured them with RAID5
Suddenly two disk has ben failed and after two days another disk have been failed.
And the array failed to start.
I replaced the ...
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qemu virtual machines slow during RAID5 check
Operating system: CentOS 7.9 (on both host and guests)
Host specs:
CPU - AMD EPYC 7502P 32-Core Processor
RAM - 250 GB (only 22G used by all VMs)
Disk - Four Samsung SSD 870 QVO 4TB, grouped in a ...
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RAID Disk shows foreign status after being removed and inserted into the wrong slot
First of all forgive me that my understanding of Dell RAID system is limited. I have a dell PowerEdge server with PREC H330 Mini controller with 6 of the 8 slot having a physical drive (each 2.182TB) ...
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LSI MegaRaid not rebulding RAID5
I have a LSI megaraid Controller witha RAID5 array of 4 disks.
This has been running for several years.
Yesterday The controller degraded the array and I cannot access the data on it because it thinks ...
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recovering raid5 from 3 working drives, one has a read error
i had 4 drives, lost one drive before, and now another drive was reported by the qnap web gui as having a read error (i did a bad block scan).
now i want to insert a new drive, in the lost drive's ...
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mdadm RAID5 mismatch, which file(s) on ext4 filesystem are affected?
After a scrub of my 4-disk RAID5 mdadm array I got these log entries:
Dec 03 07:20:53 srv10 kernel: md1: mismatch sector in range 204340608-204340616
Dec 03 07:20:53 srv10 kernel: md1: mismatch sector ...
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Raid 5 array won't assemble after 1 drive's partition table was wiped
This is my first post/question here, so please bear with me.
I have an issue with my system where my existing raid5 array won't assemble. This occurred after I inadvertently wiped the partition table ...
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Disk throughput: Understanding DM writespeed vs SDA
I am trying to troubleshoot some performance issues.
When i look at my nodeexporter graph, I see numbers i dont understand:
Disk throughput
As I understand, DM-1 is my logical volume, sda is my disk(...
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mdadm array state not fully active - faulty device
I use 4 drives as a raid 5 on my Raspberry Pi. I shutdown my Pi every night and start the next morning. Sometimes the array appears to be faulty. Maybe the Pi doesn't properly mounts the drives ...
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Unable to Install Linux Mint on RAID
Second week now than I'm trying to setup Linux Mint on software RAID5 without success.
I'm able to setup the software RAID5 on the live CD with three 240GB SSD, then the installation setup fails to ...
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Mixing Seagate Ironwolf 4TB ST4000VN008 and ST4000VN006 in RAID5 [closed]
I have purchased 4 drives from Seagate to build a home cloud based on RAID5. However, I occasionally ordered different models: two ST4000VN008 and two ST4000VN006.
Now I am wondering, shall I send 8's ...
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HP ProLiant DL380e Gen8 - Cant Access Raid Controller
i have a HP ProLiant DL380e Gen8 Server with ah P420 Raid Controller. I have configured Raid 5 with 3 Disks. I want to expand the Raid with 2 more Disks. But i cannot access the Raid Controller -> ...
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How to recover file system (ext4) on raid5?
I have an ext4 file system on a raid5 array, /dev/md0 built from mdadm.
I found it wasn't mounted after I reboot once. And I ran a fcsk on it but get a superblock error.
So I was going to run mke2fs -...
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Recover inactive raid5 array (disk not included in array?)
I have a 4-disk raid5 setup, and after a power outage one of the disks suddenly thinks it doesn't belong to the array.
Each of the disks are /dev/sdb-e, with the raid at /dev/md0.
mdadm --examine /dev/...
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RAID 5 with Windows Server 2016 R2 - 45 drives - 10 hot spare
I have a 45 drives server that will be running Windows Server 2016 R2. It will be fully populated and utilizing RAID 5 and I want 10 of the drives to act as hot spares. We have been searching all over ...
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Synology SHR Volume - Migrate from 3 disks (RAID5-ish) volume into 2 new disks (RAID1-ish)
What I have:
3 x 6TB SHR Volume with 12 TB redundant storage (1 disk recently broken)
What I want:
2 x 18TB SHR volume with 18 TB redundant storage (I'll expand the volume after the migration)
Of ...
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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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RAID Recommendation Request: 2x RAID5 arrays, 1 Large RAID5, RAID10?
I just ordered a new PowerEdge R650 which will be the primary server for our company. It will run HyperV with 10 - 12 virtuals on it, mostly Windows but some Ubuntu. All the standards: domain ...
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Raid Array with only a Partition of some Disks
I was wondering if one could set up a RAID-5 array such that only some space of the third disk is used in the raid array and the left over space can be used as a non-raid volume.
I have three HDDs ...
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How to partition disks in Debian 10 installer for RAID5 on UEFI machine?
Installing Debian 10. I have 3 disks I want to use as RAID5 on a UEFI machine.
I have tried several configurations that either led to failure to install grub or failure to boot (stuck in grub-rescue ...
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Can RAID 5 be made, when one or more of the disk is actually RAID 0?
I have this question since (I think) 3 years ago, but since I was never actually planning to build server, I just shrug it off. But tonight, I literally can't sleep because of this burning question.
...
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Rebuild RAID5 with uncorrectable sectors on multiple disks
My software RAID5 (mdadm) system consists of five disks. Recently, I get I/O errors when reading certain files. Most of the other files are still readable.
At first, I was planning to find out which ...
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Windows RAID drive performance suddenly dropped
I have a Windows system that has as a data drive, one RR640L controller. Attached to this controller are four 2TB drives in a RAID5 configuration (2 Seagate ST2000VN000 and 2 Samsung HD203WI).
...
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P420i controller / 2 disks failed in RAID5 / RAW FS after parity initilization
We woke up this morning with 2 failed disks on RAID5 with a single hot-spare configuration.
Hot-spare disk didn't replace any damaged disk maybe because there are 2 disks failed at the same time.
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Add disk to QNap Raid 5
I have a QNap TS-569 Pro configured with Raid 5 of 4 hard drives of 1 Terabyte each.
It has 5 disk slots and I want to increase the size of the Raid of another Terabyte.
Reading the manual seem pretty ...
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RAID5 array is rebuilding after a fresh install of Ubuntu 20.04 Server
I installed Ubuntu 20.04 Server on a system with three Seagate 6TB drives. I have partitioned both sda and sdb in two partitions. The first partition on each disk is of 5G. I combined those two 5G ...
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e2fsck cleans a filesystem and then a few minutes later (after a lot of reads) there are errors
The filesystem is on an LVM RAID5. It appears to be working correctly:
$ sudo pvs
[sudo] password for jrwren:
PV VG Fmt Attr PSize PFree
/dev/sda2 datavg lvm2 a-- <7.28t ...
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mdadm : assemble raid5 created with missing disk
2 years ago i've created a raid5 array with 2 disks like this :
mdadm --create /dev/md0 --level=5 --raid-devices=3 /dev/sdb1 /dev/sdc1 missing
Now i've rebuilt my system with latest ubuntu server LTS,...
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Do I need a spare slot to replace a drive in an LVM raid array?
I am planning to set up an LVM raid 5 array and looked at how to replace a faulty drive.
I found the replace command
lvconvert --replace dev_to_remove vg/lv [possible_replacements]
For this to work, ...
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Mounting 32Tb RAID Volume Causes Server To Crash
I have a 32Tb NTFS RAID 5 volume. 5x8tb SATA, LSI 9361i+Supercap.
Was working fine until it started behaving strange on day - drive name vanished and data seemed to vanish. Then rebooted, Windows 10, ...
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Recover mdadm array
I had a raid5 array built with mdadm and btrfs filesystem on top of it.
My sata card failed and all my drives dropped at the same time. What should I do if I wanted to rebuild the array or restore ...
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How to create a more than 64TB software RAID 5 Volume on Windows? [closed]
A customer is looking to create a RAID 5 array on Windows 10 Pro, but Windows RAID 5 only allows him to only create 63 TB volume instead of his 112 TB (he has 8x16 TB HD).
Is there any way to create a ...
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What Happens When You Write Data To Raid While It Is Scrubbing?
I have a RAID 5 setup with almost 15TB of data capacity.
In the past I have let it go unchecked for too long, and found that multiple drives had SMART errors and I want to prevent bad blocks. I am ...
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I cannot expand RAID5 capacity on an Adaptec RAID 71605, an "expand" in ribbon is greyed out
I have 4 disks RAID5 array and want to add additional identical disks in order to expand the capacity.
I do everything as instructed, but "expand/migrate" buttons are greyed out, so i cannot ...
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Getting high read await in Zabbix monitoring, is this a common behavior for RAID5 disk array?
We are running a Oracle 11.2 DB on Redhat 6.8, and disk array is configured as RAID5, which is using a Lenovo 730i RAID adapter.
I checked RAID policy and found that "Read Ahead Always" and &...
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How is RAID3/4 is implemented for more than 4 drives?
I understand that, RAID 3/4 for 4 drives is: Parity Drive = D1 XOR D2 XOR D3. But what is there 5 drives or more? For example 5 or 6. How many parity drives is needed, and how XOR algorithm is working ...
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Ways to make a backup on RAID5 filesystem (mdadm) with many files
I have a NAS containing RAID5 array (5.4TB in total, 2.9TB in use) using mdadm.
Now I plan to modify some hardware of it (especially SATA controller), so I'd like to have a whole backup of this RAID5 ...
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Creating a raid5 array with 4 disks in Ubuntu is only giving me 3 active devices
When installing Ubuntu 18.04 LTS in a new machine, I'd like to create a RAID5 array.
I have 4 1TB disks available.
However, since Ubuntu can't boot into the RAID5 array, I'm having to use one of the ...
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RAID 5 - Data corrupted after drive failure?
I have a workstation that uses an adaptec RAID 71605 controller with 4x8TB WD drives in a RAID5 config. One of these drives failed, and after replacing it and rebuilding the RAID, a lot of the data ...
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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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mdcheck hangs when attempting to stop check
I have a raid5 array that has a check run on it once a month. It is configured so that the check runs for 6 hours from 01:00 and then stops. The following nights it will resume the check for another 6 ...
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Can iostat output show mismatched read data for mdadm raid5 array?
I'm trying to understand this iostat output:
tps kB_read/s kB_wrtn/s kB_dscd/s kB_read kB_wrtn kB_dscd Device
500.30 58.9M 19.4k 0.0k 329.1G ...
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highpoint rr62x RAID 5 status disable, recover saying parameter error
I have been using a Highpoint rr62x controller(BIOS version 1.3) for about a decade now. The RAID-5 volume is containing 4 disks-each 3TB.
For the last five years my RAID has been disabled. I have ...
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Raid 5 is brocken after replace a disk
My server mailed me that one of my disks failed to read a block. So I decide to replace it before it failed completely. I added a new disk and replace the failing one.
sudo mdadm --manage /dev/md0 --...
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md raid5 extremely slow on discard
Hi all md raid experts
Running Centos 8 (with all latest updates, kernel 4.18.0-240.1.1.el8_3.x86_64) where I have 3x2T Samsung SSD 860 QVO 2TB in raid5 (to be used as base for some KVM VMs) and when ...
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What is the overhead of ZFS RAIDz1/2 in HPC SSD Environment?
Example hardware / host:
Modern 64 Core CPU, 128GB Memory
8 x Micron Pro 15.36TB u.2 SSDs
SSDs connected by dedicated Oculink per device (no backplane or PCIe sharing)
Ubuntu 20.04
Use case:
A ...
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Advantages of partitioning RAID HDs?
I have a bunch of identical, brand new HDs (4*3T, if it matters) I need to use for a single RAID5 array (Linux mdmadm).
It is still undecided if I'll use the entire combined content for a single ...
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Dell Power Edge R940 RAID Failure: the foreign configuration cannot be imported since the configuration is not complete
Dell Power Edge R940
RAID 5 Array
BIOS version 2.3.10
PERC H740P Adapter
Some of our guys pulled of all of our disks, one by one from the server while it`s worked, to rewrite theirs serial numbers.
...
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