Questions tagged [raid]
RAID, an acronym originally for Redundant Array of Inexpensive Disks (today usually interpreted as referred to as Redundant Array of Independent Disks), is a technology that provides increased storage performance and reliability through redundancy by spreading data across multiple disks using various algorithms (RAID-levels). RAID can be implemented in hardware storage controllers, or in software, usually as operating system/kernel features.
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Can MegaRAID controllers use their writeback cache in JBOD mode?
Similar to this question, but for Broadcom/LSI controllers: Can MegaRAID controllers use the onboard disk cache for JBOD drives? (I would like to enable the controller's hardware cache and then use ...
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HP P440AR version 7.0 with Samsung 870 1TB drives - RAID6 esxi 8.02
I have a ProLiant ML350 Gen9 with P440Ar Raid controler, on which i added 6 Samsung 870PRO 1TB drives and put them into RAID 6 configuration with additional SSD drive with esxi 8.02
Everything went ...
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ZFS scrubbing keeps reparing disks
I've got two SSDs in a RAID 1 (mirroring) configuration on ZFS. They are quite old (~10 years I guess) but have never been used much in these years. That's my configuration
pool: tank
state: ONLINE
...
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HPE Dl380 Gen 10 + P822 + SAS Disks + Truenas +HBA Mode
Hi I have a DL380 Gen10 server and an P822 SAS expander laying around which I want to repurpose as a truenas box. I have a bunch of 2TB SAS drives which I want to use for this. I have managed to ...
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Can I make md (Linux software RAID) more fault tolerant?
I have a particular hard drive in a RAID 1 mirror that gets failed out under heavy load, typically, when I run a full backup.
There is nothing wrong with the drive. Ok, it is getting one error when ...
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RAID 6, SSD Cache, Journaling, mdadm, LVM, Filesystem Strategies for Data Resiliance
I'm replacing a NAS server thats been in loyal service for almost a decade now. It will be repurposed as my offsite backup, but now I'm setting up a new NAS from scratch for homelab and need some ...
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Raid 6 mdadm and 20 disk
Is it possible to add more than 2 disks for parity in mdadm raid 6?
I need to build a storage of 20 disks. How to build a raid that would be reliable?
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Storage configuration for GPU servers (ML training)
We have recently purchased a couple of high performance GPU servers to use in training AI/ML models and the job of set up and administration has fallen upon me.
I'll preface this by saying I am ...
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How to get Debian RAID 1 preseed to populate EFI partitions on both disks?
Most similar question I found: Ubuntu software raid on efi, how to boot off second drive?
My situation is, I have a working preseed file for Debian installation that will configure my NVMe drives to ...
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Smart array P212 error code 727
We recently purchased HP DL380P GEN8 server and D3700 enclosure with 20TB of disks.
I wanted to connect both servers with Smart Array P212 but I encountered and error once I tried to configure the ...
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Spin down hot spare when not in use
I have an avago raid controller managing an array of 4 disks + 1 hot spare.
----------------------------------------------------------------------------------
EID:Slt DID State DG Size Intf Med ...
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Which software is recommended for building RAID in Windows 10?
We are running Windows 10 LTSC Enterprise. The workstation has 2 HDDs. I have created RAID1 with Storage Spaces. It is working well. But if I disconnect one of the disks, the notification comes only ...
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Unable to get my rsync of my software RAID 6 past 40MB/s. Looking for suggestions
Wondering what I could adjust to get my RAID 6 Software Raid to resync quicker. Currently it's proceeding at max of 64MB/s and averages to something around 25MB/s. Hoping to get it to 200MB:
[...
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Use storcli to get / set spare drive
I have an LSI controller with a R10 array consisting of 4 drives + 1 spare. Storcli reports:
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EID:Slt DID State DG ...
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Is LSI rebuilding as background task
I'm investigating the state of an LSI raid array that might have recently suffered a drive failure. The array had a spare configured, so the array is not degraded. However, the storcli command ( /...
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How check if UBad disk on LSI RAID is really failed
I have taken over responsibility for a new server with an LSI RAID card, configured with 4 drives (in R10) plus one spare. I normally manage RAID arrays by taking down the server and configuring via ...
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install disks with raid on a controller of the same model? without losing data. hp dl160 g9 - b140i
I have an HP DL160 Gen 9 server with 4 disk drives, 2 HDD with RAID 1 and 2 SSD with RAID 1.
This server is restarting repeatedly when the esxi System boots.
If I install these 4 disks on an identical ...
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BIOS/Hardware Mirror Drive RAID 1 - Reliability, Consistency and Synchronization
Assuming I have enabled in BIOS a (presumably) hardware RAID in mirror aka RAID1 mode (as opposed to Software-one provided by the OS like Windows Storage Spaces), how is it actually ensuring data ...
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How can I fix my unbearably slow NFS linux server?
I'm currently struggling with an extremely slow server providing home directories through NFS, and I cannot figure out the origin of the problem. It's all running on Nixos, but I don't think that's ...
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Avago/LSI flash tool does not detect SAS card
I'm trying to reflash my LSI 9300-4i (M1210) RAID card but hitting a wall. First of all, my BIOS detects the card as shown here:
And then I've tried booting DOS, Windows 10, and EFI shell. When I ...
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pvs vgs do not show existing drive group from multipath
I connected a raid system via multipath. multipath -ll show correctly the subdrives and the mapper is present under /dev/mapper.
However I cannot see any physical or volume group using pvs, pvscan vgs ...
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Server 2022 Expand C:
I have a server running Server 2022. It has 2 Disks running in a raid configuration, copying everything from one disk to another (2TB per disk, 2TB total storage). I added 2 more disks(2TB ea), ...
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mdadm raid1 showing removed disk
I have a dedicated server which consists of two hard drives with 5 partitions each.
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 1.8T 0 disk
├─sda1 8:1 0 1M 0 part ...
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LSI IT vs IT_ACM firmware
I purchased an older LSI 9300-4i card and before I put it into production I want to flash the latest firmware. In addition to IT vs IR flavours of available firmware, there's also an IT vs IT_ACM ...
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Converting partition from basic to dynamic in Windows Server 2022 gives security error
The server has 2 1 TB SSD drives, meant to be in RAID1 on the OS level, using Windows Disk Management, or Diskpart.
We have over one hundred of servers with this configuration which were installed ...
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Hetzner server installimage - 4 disks, raid 1 with two of them
The following problem I have 4 disks on my Hetzner server (because cheaper dont ask)
I want Raid 1 with the most space possible. For easier setup I'm first trying 2x2TB ignoring the other 2 disks for ...
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ESXI RAID : add an extend to existing VMFS datastore
I noticed in ESXI (6.5) there is option to create something like software RAID, but it is called "Add an extent to existing VMFS datastore", does anybody have experience of what it does and ...
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Why is omreport storage vdisk controller=0 inconsistant output across servers
I wrote a script fetching the RAID configuration of the latest VirtualDisk.
On one server I get :
# omreport storage vdisk controller=0 -fmt ssv | awk '-F;' '/^ID/{print}/Virtual\s*Disk\s*[0-9]+;/{...
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Unexpected poor performance with NVMe drives on an X9DR3-F
I am experiencing what seems like uncharacteristically low performance from an NVMe SSD stripe in a server. The hardware is as follows:
Motherboard: X9DR3-F
CPU: Dual E5-2650v2
RAM: 128GB DDR3-1333 ...
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How does VMWare vSAN's RAID5/6 work
BLUF: How does VMWare's implementation of RAID5/6 work?
Below is VMWare's chart for RAID5/6 in vSAN:
It seems VMWare is altering RAID's terminology. When I hear RAID6 I think two parity of something; ...
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Find which physical disks are in virtual disk from CLI
I have the following virtual disk :
# omreport storage vdisk controller=0 vdisk=14
Virtual Disk 14 on Controller PERC H730 Mini (Embedded)
Controller PERC H730 Mini (Embedded)
ID ...
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Can one VG (Volume Group) contain different types of PVs (Physical Volumes)?
The background is we have our database data directory on an LV which is located on a VG. We want to use the LVM's snapshot function to backup our database data, but this VG has no free PEs left. We ...
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Mdadm Raid5 kicking non-fresh drive from array
I set up a mdadm raid5 with 3 drives initially: sdc1, sdd1, sde1. They array creation was successful without issues. Later I decided to extend the array using one more drive. After proper partitioning,...
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Issue with Volume Mounting after Server Restart
Originally on bkp-01 instance. The server and disk have manually been set to a different availability zone. The disk are running zfs for backups/snapshots. It's an old server with a manual Raid ...
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HPE Smart Array P410 - Replacing failed drive of a degraded mirror with a new one using ssacli with the failed drive kept connected?
A server is using attached drives without the HP hot-plug drive cage, with drives attached to P410 using two SFF8087 -> 4x SAS SFF8482 cables. I can add new drives while running, but cannot remove ...
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Increasing RAID1 (mirror) redundancy in HP Smart Array P410?
Please is it possible to add a third (or more) drives to a mirror (RAID1) in P410? IIUC it would mean creating "Mirror Group 3" (or more). I could not find any way to add a new mirror group ...
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Ubuntu 22.04: Rebuilding a failed RAID 1 OS Boot drive
I'm very new in the Linux world and I find it very appealing so I decided to buy a rackable server to use it to learn more (it's a very old Dell R710 which i found very cheap but I find it perfect for ...
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Replacing a single SSD in 4 disk mixed software RAID 1 & RAID10 system
I'm about to replace a single SSD in a 4 SSD RAID 1 & RAID10 system. My webhoster will only do the drive replacement, but not help with adding it back to the array after. I've not done this before,...
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Do I have any chance at a cowboy rebuild of my busted Raid5 Array?
Ok, I'll try to keep this quick. The data on these drives isn't mission-critical so there's no backup. Losing the data would be a bit annoying, so if I could get it back that would be neat, but if not ...
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How is Hardware RAID for NVME drives configured on SuperMicro?
I've purchased as x13sae motherboard from supermicro which is advertised as
M.2 Interface: 3 PCIe 4.0 x4 (RAID 0, 1, 5) M.2 Form Factor: 2280 M.2 Key: M-Key
I have two NVME dries in my m.2 ports. I ...
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drive went missing but came back on reboot, how to rebuild missing boot partition?
I checked my server and found one drive to be missing:
root@tiefenkaese ~ # lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme1n1 259:0 0 476.9G 0 disk
├─nvme1n1p1 259:2 0 32G ...
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Storing each file on separate physical drives for a single file volume
I am working with a bunch of really large files (>100 GB). As we often process multiple large files in parallel (e.g. 10-12), we think that it might be advantageous to have each file be stored on ...
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Ubuntu RAID 1 mdadm, failed boot, files are there but won't boot
Have a 3 disk RAID 1 array of my os drives, ubuntu 20.04, software RAID. I had to shut the server down temporarily to install a new PCI card, went to boot it back up and the OS said no boot device ...
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Best practice to install proxmox (7 or newer) on server
i did a lot of research and i am still wondering, where to install os (proxmox). We have ProLiant DL560 gen8 and gen9.
My options:
micro SD card 32/64GB, not good because of lots of writings from
...
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RAID10 on SSD drives
I can't find information about using SSDs in RAID10. If I want to build RAID10, should I create RAID partition in 80% of total drive size on each drive?
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Can I build a RAID 5+1 system?
I must say I already found a similar question on this platform, but the context was different, so I'm trying by myself.
My idea is as follows:
I have 4 disks, 3 of them are the same capacity, and the ...
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zfs performance: split controller across mirrors vs splitting a mirror across controllers?
Suppose I have
4 disks split into 2 zfs mirrored pairs
2 sata controllers, where each can take 2 disks
Obviously, better expected uptime will be achieved by splitting each controller across both ...
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can I change the Raid setting without reformatting the hard disk?
I have configured the Dell R740 to use Raid 5 (mixtured of HDD/SDD storage) to run citrix xen server for VMs.
In the past it was configured as Raid 1 mirroring and resulting insufficient storage.
...
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LVM mirror with failed disk can't be repaired
I'm trying to help someone resurrect a RAID1 mirrored LVM logical volume on an old server running Fedora 20 (lvm2-2.0.2.106, linux 3.19.8-100). One of the disks in the mirror is dead. The disk ...
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Rebuild a drive in a raid 1 array that got disconected
I am running on Ubuntu 20.04.4 LTS. I have 2 drives in a RAID 1 array. One of them got acidentely disconnected but is now connected again.
raid1 sdb1[1] sda1[0]
I have [U_]
How do I synchronize?
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