Questions tagged [software-raid]
RAID solution handled by the operating system.
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RAID Configuration on Model Proliant DL380p Gen8
how do I see the RAID configuration on HP Proliant DL380p Gen8 without the need to restart the server?
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Is putting Server 2019 (full os with hyper-v) and 2 2019 Guests on a single two-disk Raid 1 array reliable enough?
We're currently experiencing some significant cpu/ram performance issues with 2 VM's on our current HPE 2015 tower server (2x Xeon 8c/8t 1.7ghz) running server 2012 for HV and guests (10 guests total),...
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mdadm RAID5 array recovery stops without SCSI errors
I have an md-based RAID5 array which has been working without issue for about 2 years. Yesterday I've had spontaneous disk and/or PHY resets on one disk (but not actual read errors). md marked the ...
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Increase space by growing mdadm RAID10 from 4 to 6 (and more)
I'm running Centos 7.8 with mdadm v4.1
I have 4 NVMe (3.2TB each) configured in a RAID 10, so 50% usable space (6.4TB):
Personalities : [raid10]
md0 : active raid10 nvme5n1p16 nvme4n1p15 nvme0n1p1[4] ...
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mdadm RAID 10 filesystem corruption -- recoverable?
PROBLEM: I had a degraded disk in my RAID 10 array which I created using mdadm. I first removed the disk, replaced it with a new one, but when I rebuilt, I got an error saying it couldn't detect the ...
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Recommended approach for booting from Linux software RAID for redundancy
I am looking for the recommended approach to setting up software RAID (using mdadm) on Centos 8 to provide redundancy.
In my setup I have 4 identical disks, but I assume the answer should also be ...
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Linux software raid slow until reboot
I am running an debian 10 machine with 3 4tb hdd drives.
Each drive has a 1GB partition for a raid1 for the boot and the rest of the disk is configured as a raid 5 for lvm.
After a while of running I ...
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Can we move RAID configured disks across different Servers
I have 2 SSD disks configured as RAID 1 using RAID feature in BIOS. By chance if my motherboard and processor is damaged, can I connect these 2 SSD disks to another Server. Will these SSD disks boot ...
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Rebooted Ubuntu, Raid6 degraded, Raid5 ok [closed]
Boot Drive is a WD 1TB SSD running Ubuntu 18.04 LTS...
I have 2 arrays running off 1 LSI Card...
16 x 8tb IronWolf inside a RaidMachine (Raid 6) [my main data]
11 x 10tb Exos inside a SuperMicro (Raid ...
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Windows software raid drives deactivated
Not sure what to make of this behaviour, but here goes.
I have 3 Seagate 4 T drives in a windows 2012 r2 server in a software raid 5. Recently, I logged onto the server to see that 2 disks (...
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SMART failure of a 4 disk software RAID10, mdadm, 2 drives show REMOVED state
Running Fedora 32 connected to a 4-port e-sata. One of the drives is clearly failing, with this message in the logs:
smartd[1169]: Device: /dev/sdd [SAT], FAILED SMART self-check. BACK UP DATA NOW!
...
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How to interpret conflicting status data between `smartctl` and `mdadm`?
I have a HDD which is a member of a RAID10 array.
smartctl and mdadm give me conflicting indications of its status.
smartctl claims that the disk is FAILED:
$ sudo smartctl -H /dev/sdf
smartctl 7.0 ...
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How beneficial are self-healing filesystems for general usage?
I have recently looked into advanced filesystems (Btrfs, ZFS) for data redundancy and availability and got interested in the additional functionality they provide, especially their "self-healing" ...
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Recovering mdadm 4-disk RAID5 array with 2 out of date disks
Edit:
The scenario in this wiki, where 1 drive has a slightly lower and another a significantly lower event count than the rest of the array, suggests assembling with --force while leaving out the ...
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Have I lost data? Can I copy a MD superblock from one drive to another?
My friend's RAID5 has lost two disks -- one failed months ago, apparently, but the other dropped out and the data is believed to be okay.
I can run mdadm --examine on (clones of) the two surviving ...
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Can I configure RAID 1 with production server running?
I am facing issue configuring RAID 1 with currently running production server (Ubuntu 18.04 LTS).
Currently my configuration is
sda 8:0 0 1.8T 0 disk
├─sda1 8:1 0 1M 0 part
└─...
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mdadm raid5 starts recovery right after creation
just for getting some experience with mdadm I've put some HDD together and try a bit. I have 2 250 GB and one 500 GB HDD. I know thats not optimal for RAID5 and I'll only get 500 GB capacity in total. ...
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Fixing a readonly-filesystem on Raid-1?
I have an Ubuntu 18 server using a software RAID-1 array, and smartctl is indicating that my /dev/sda is failing. Both Throughput_Performance and Reallocated_Sector_Ct are listed as "FAILING_NOW".
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What is the difference between RAID defined by host controller versus Linux RAID defined by software?
I have a Proliant DL380 G6 Server with 4 146GB 2.5" SAS drives.
In Ubuntu, (I'm using Webmin to manage), I see a single physical volume, as though there actually is only one disk.
If I run the ...
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Boot failing due to SMART error status?
I have an Asus server that was refusing to boot, reporting:
SATA Port 1 : Hitachi HDS721010DLE630
S.M.A.R.T status bad, backup and replace
So I went into the bios, disabled "SMART status check", ...
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ZFS 3-drive setup on Debian
I have a machine with 3 2TB SSD drives, I want to configure openzfs at least on two of them. The root partition has ext4 and if possible I would like to avoid reinstalling everything, so I am ...
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Promoting a secondary plex to primary
I have a Windows Server 2008 R2 install that uses Windows software RAID to mirror the drive. The primary drive is failing. I installed a new drive to the set and syncing is almost complete. Once the ...
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Single software RAID partition missing after replacing failing HDD
I have a raid-1 with 5 partitions (md0 - md4).
Last night one of the HDDs failed (the faulty RAID partition was md4), I removed it, replaced it with a new one and now in the rescue system suddenly ...
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Software linux raid using physical passthrough disks
I'm using Vmware ESXI and I followed this guide to pass through 2 physical disks for a raid 1 array. If I set up an mdadm software raid using these two physical passthrough disks will something go ...
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How to configure RAID-5 for OS root (Ubuntu Server 18.04)
I have a fresh dedicated server I have provisioned running Ubuntu Server 18.04 and with 3x480GB SSDs (no hardware RAID controller though). The UI of the hosting provider will not allow the “/boot” or “...
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Can I make a mdadm raid on a file, not a block device?
I would like to play with mdadm, the Linux RAID system. I want to see what happens when you fail a drive, when you grow the raid etc etc. My initial thought was to create 4 equally sized files (...
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RAID 1 Reliability: 4 drives vs 2 Drives + 2 Spare Drives
Which is likely to be more reliable (safer data + lower downtime):
having 4 drives in RAID 1
OR
having 2 drives in RAID 1 plus 2 spare(s)?
In other words, is there an advantage in having spares when ...
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Will I be able to expand Synology later without losing data with regular RAID
I just got Synology 918+ and bought 2x10 TB Hard drives. Before I set up, I just want to avoid getting into trouble in the future.
I don't want to use SHR (Synology hybrid raid) because of several ...
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usb jbod enclosure, software raid1; after reboot, mdraid using wrong devices
I mirrored two disks in a USB enclosure on my Arch box, created a filesystem, mounted it, copied a bunch of data over. Everything was great. Then I waited until the md sync was done and rebooted...
#...
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Ubuntu: /dev/sdb1 is apparently in use by the system; will not make a filesystem here
I get this error when I try to format dev/sdb1:
$ mkfs.ext4 -L data /dev/sdb1
mke2fs 1.42.13 (17-May-2015)
/dev/sdb1 is apparently in use by the system; will not make a filesystem here!
where /...
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Degraded Array. RAID 6 with three disk failure
I have an array of disk with RAID 6 and 16 Drives. Days ago three disk failed and the Array was marked as Degraded. I cannot access the data and I cannot boot into the Operative System. I need access ...
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How to add hot spare to software RAID1?
I have a CentOS 7 server. It is running a software RAID 1 mirroring three disks. I want to add a 4th disk to act as a hot spare. My intention is that in the event of a failure of one of the three ...
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Creating a script for Kickstarting servers; issue with created softraid 1 server based on CentOS 7
First off; I am sorry if my title is incorrect, but I didn't want to "clutter" it too much.
I am creating a bash script which is used to install various servers based on CentOS 6 and CentOS 7 with ...
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can I upgrade soft raid0 to raid10 or raid01? and how?
currently status:
4 disk part 200G each, total 800G using raid0
raid0, md0: sda1+sdb1+sdc1+sdd1
and I want to add another disk part sdf1(>800G)
combine with md0 to make a raid10, like
raid1, md1: ...
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mdadm raid5 was added as a spare to itself
I have a raid 5 device created with mdadm. I was working on it and long story short, I wanted to type mdadm --manage /dev/md127 -a /dev/sdd, but I accidentally typed mdadm --manage /dev/md127 -a /dev/...
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Single drive performance in RAID1
I see many tools to measure the performance of RAID1.
But how to measure the performance for each SSD in RAID1?
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Access clean RAID5 on new machine using 2 of 3 disks
A server of mine is dead. On the server I had 3x disk with a software raid on the second partition of every HD.
Now I have inserted two out of three HDs in a PC (no place for the third!). Here what I'...
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How can I generate/or edit a grub.cfg on each EFI partition that refers to the ubuntu installation on the same physical disk?
I have an install of Ubuntu 16.04 server set up on two disks with software raid across two large partitions. The start of each disk contains an EFI partition. I would like to be able to boot from ...
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Recover unknown raid setup
I have 2 disks, they are the same make, model + size.
Both of them have Linux RAID partitions on them.
I think they used to be in a software raid1 array together, but I am hesitant to just jump in and ...
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Windows Server 2016 - SSD + HDD in SW RAID1. Drawbacks?
This is a weird question I realize that, but hey.
So, I have an SSD in my server. It's a datacenter SSD, I guess (and hope) it will not have any issue for the next few years - as I barely put any ...
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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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Drive reports as failed when attempting to assemble a RAID array created on another machine
I'm working on a script to automate the process of creating a RAID array and am currently trying to figure out how to get multiple machines to recognize the array so the data can be transferred after ...
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Problems with auto-mounting MDADM-created RAID array and creating RAID device
I'm working on a script that automatically detects new drives that have been added so they can be formatted and turned into a RAID-5 array. I've been able to detect the drives and format them with ...
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How to recover from drive failure on lvm software raid 10 in Linux?
Below is how I created lvm software raid10.
Create Physical Volumes
pvcreate /dev/nvme0n1 /dev/nvme1n1 /dev/nvme2n1 /dev/nvme3n1
Create Volume Group
vgcreate my_vol_grp /dev/nvme0n1 /dev/nvme1n1 /...
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PERC H330 or Windows Storage Space on Raid 5
I'm trying to build a raid 5 array for our file server using the following:
1. Dell Poweredege R530 - server
2. Windows Server 2016 - OS
3. 3x 4TB SAS - Hard Drives
4. PERC H330 mini - embedded ...
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mdadm: Resume initial sync
I have a new md RAID10 that I created (on a Synology DS416slim, which is besides the point), which was in the process of initial sync:
root@ds416slim:~# cat /proc/mdstat
Personalities : [linear] [...
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Why has open-iscsi two times slower writes than Samba via 10G Ethernet?
On my local file server I have raid-6 on 7x HDD drives.
dd if=/dev/zero of=tempfile bs=1M count=2048 conv=fdatasync
Local speed test gives me 349 MB/s write speed.
Remote writes to Samba from SSD (...
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Questions about RAID Creation
I'm currently working on a project that requires me to write a script to identify a set of drives added for the purpose of storage and install them as a RAID array. I'm having trouble finding ...
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Does KVM/QEMU support mdadm RAID5 properly?
I'm not able to get anything close to usable performance using a guest file located on a mdadm RAID5 array.
I've believed I optimized all the parameters of the array and filesystem for best R5 ...
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Internal HDD keep being dropped
I own a server on which I run flexraid and since a couple of weeks, I get the issue that whenever the server is doing some heavy operations on the RAID, one or more harddrives get dropped.
In order ...
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