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.
3,689
questions
18
votes
4
answers
40k
views
How to resize RAID1 array with mdadm?
I've running Ubuntu 11.04 (kernel 2.6.38-11). I replaced 2x160GB with 2x500GB drives. They are configured as RAID1.
The partition tables show the right sizes. Here's sfdisk:
# sfdisk -d /dev/sdb
# ...
- 271
2
votes
3
answers
2k
views
Debian software RAID1 is not working when I remove hard drive
I have been trying all weekend to get RAID working on an old server computer with the Intel ICH7 / ICH7-R SATA-II controller running dual hard-drive with RAID 1.
After giving up in hardware raid, I ...
0
votes
0
answers
51
views
MegaRAID LSI SAS-9266-8i no RAID6 available after flashing firmware
Dear Good People of serverfault.com,
I flash my MegaRAID LSI SAS-9266-8i RAID controller with latest Mega Firmware found here broadcom.com using storcli64. Everything went fine However, it seems there ...
- 185
0
votes
1
answer
84
views
Upgrade HDD to SSD - RAID 1
I will upgrade a RAID 1 with 2 HDDs to a RAID 1 with 2 SSDs on a Dell T420 server (PERC H310).
But first I'd like to make some tests with a new OS installation on this new RAID 1 with SSDs.
Can I take ...
- 13
10
votes
3
answers
42k
views
RAID 5/6 rebuild time calculation
I plan to build some storage schema but I have to anticipate downtime, maintenance and rebuild Time.
Some guys said to me that a 10 disk RAID6 of 10To (SATA) rebuild will last for about a week ! ...
- 1
5
votes
2
answers
6k
views
ZFS protection against bit rot and silent corruption without RAIDZ
I have never encountered a disk failure in my whole life but I had a dozen of bit rot and silent corruptions. 'Normal' file systems and hardware RAID does absolutely nothing about it. I have been ...
- 161
0
votes
1
answer
551
views
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 ...
- 1
4
votes
2
answers
76
views
Hardware RAID controller replacement/drawbacks
Apart from the price, is there any drawback to use hardware RAID controller to create a RAID 1 (mirror) array?
I mean, for example, is it possible to create the RAID 1 array with the baseboard RAID ...
- 396
32
votes
11
answers
21k
views
To improve SQL performance, why not just put lots of RAM rather than having faster hard disks?
People keep telling me that in order to improve an SQL server's performance, buy the fastest hard disks possible with RAID 5, etc.
So I was thinking, instead of spending all the money for RAID&...
- 50.7k
3
votes
2
answers
111
views
What is the risk of putting a RAID superblock at the end of a device?
I want to set up a RAID 1 array using mdadm to store backups (I'll be using rsnapshot to do the actual backups). I've read that using metadata 0.9 or 1.0 format with RAID 1 is advantageous because ...
- 41
1
vote
2
answers
814
views
Raid-10 mdadm - How to Manually Configure Mirrored Drive Order?
How do I configure a new mdadm software RAID-10 to use a specific order for its drive mirroring?
Say I have 4 hard drives: A, B, C, and D.
For my own reliability and performance reasons, I want drive ...
- 111
0
votes
0
answers
27
views
Raid10 Shows 5 Active Drives!
I built two raid 10 arrays during an Ubuntu 22.04 Server install, and the system works fine, but one of the two RAID 10 arrays shows all five drives (1 that should be a spare) in "Working" ...
- 1
1
vote
3
answers
10k
views
SBS 2003 boot stalls at acpitabl.dat
I have a SBS 2003 server running for 3 year without any problems, and few days ago it freezes during the boot.
System is using two 500 Gb drives in RAID1 (Intel Matrix 7.5)
After trying to load in ...
CommunityBot
- 1
2
votes
2
answers
6k
views
Dell PERC H750 compatibility with Debian
I've been using Debian on Dell servers for many years.
For a long time I've been using the PERC H730P RAID controller, which is well supported by utilities like MegaCLI.
Recently I've bought a R440 ...
0
votes
0
answers
41
views
Proper usage of linux mdraid spare-group
I'm going to create two raid1 arrays, lets say:
2x1tb - /dev/md1: /dev/sdb, /dev/sdc
2x2tb - /dev/md2: /dev/sdd, /dev/sde
My idea is to use one additional 2tb hdd /dev/sdf as hot spare which will be ...
1
vote
0
answers
36
views
IMSM (Intel Matrix Storage Manager) device is not detected by Linux kernels 6.6.x/6.7.x but works in 5.19.17
In kernels 6.x.x /dev/md/imsm0 does not appear at boot.
The only difference I see in dmesg which seems to be relevant:
block device autoloading is deprecated and will be removed.
Printed in 5.x.x, ...
- 173
20
votes
4
answers
51k
views
How do I list which drives are part of each RAID array?
I have a linux software RAID using md. I want to list all of my RAID arrays and each hard drive attached to them. Is there an easy way to do that?
- 294
0
votes
0
answers
70
views
storcli64 not importing a foreign dg with disks previously offline
I experienced a weird cascade of disk "failures" w/in a few minutes on a AVAGO MegaRAID SAS 9361-8i on Linux. During this time, a hot spare drive was never spun up. Ignoring a few ...
0
votes
1
answer
43
views
Esxi lists two disks instead of one RAID1 [closed]
I'm trying to install Esxi on a Dell PowerEdge R210 II.
I enabled RAID in bios and then created RAID1 (CTRL+R at boot). This part is OK.
But the Esxi wizard lists two disks when I need to select ...
- 36.8k
2
votes
2
answers
2k
views
MegaRaid Storage Manager - lack of option "Create Virtual Drive"
I'm using MegaRaid Storage Manager v 14.11.01.00
I want to create second Virtual Drive.
I see
Scan Foreing Configuration
Save Configuration
Clear Configuration
Preserved Cache (greyed)
Update ...
- 1
8
votes
6
answers
17k
views
LSI Megaraid alarm - clearing hotspare
I have several Supermicro servers with LSI Megaraid controllers, 9266-8i. One recently lost a drive; I replaced it as usual, but it is still beeping on reboot. It is set up as RAID 10 + hotspare.
...
- 438
1
vote
0
answers
40
views
LVM Expand RAID1 with Asymmetric Segments Across 3 Heterogeneous Disks
I have 3 disks: one 1TB drive (A1), one 2TB drive (A2), and one 3TB drive (B). Currently, A2 has data on it in one LV that is 1.6TB in size. A1, A2, and B are PVs, in a volume group MyVG. I desire a ...
- 111
1
vote
2
answers
1k
views
MDADM RAID-1 "not large enough to join array" on identical partition tables
I have two disks with identical partition tables (sudo sfdisk -d /dev/sda | sudo sfdisk /dev/sdb) that mdadm refuses to merge as a RAID-1 array.
$ sudo mdadm --manage /dev/md0 --add /dev/sdb1
mdadm: /...
- 1
0
votes
1
answer
39
views
Brand New RAID Array Shows 99% Full (Adaptec ASR-8805)
All -
Just brought a new array online on Windows 11 build.
I created the array in the Adaptec BIOS and did Build/Verify until it was 100% complete.
I saw the drive when I booted into Windows (separate ...
- 51.9k
0
votes
0
answers
60
views
FreeBSD ZFS raidz1 Started a (da59) drive replacement. During resilver, second drive (da60) failed
Our system started slowing down... Found a couple of drives in the same raid that looked scary.
Replaced the drive that S.M.A.R.T. marked as failure eminent. (da59)
Then da60 started to error.
Finally ...
0
votes
0
answers
46
views
Unable to format external SSD drive which was member of a raid
I try to reuse this drive as a single storage but if I zero it's super blocks then it restarts the md127 component.
Tried everything like format from windows 7 with no avail...
4
votes
2
answers
968
views
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 ...
- 1
0
votes
1
answer
72
views
Is it possible to post-install disks in raid?
I have just received my new Ubuntu 22.04 workstation from Lenovo (Thinkstation P620)
It has 2 1TB disks, that I want to use in RAID 1 for /, and 4 2TB disks that I want to use in RAID 5 for /home.
...
- 288
0
votes
0
answers
78
views
Is an in-place upgrade of HPE storage controllers non-destructive?
I've taken over a relatively small shop and would like to upgrade a host that's in production. Looking to get a more definitive answer to the title and would appreciate some firsthand experience.
The ...
- 1
-1
votes
1
answer
67
views
SR650 - Raid 5 - HDD
Last week one HDD went to critical status in RAID 5.
I was able to replace it and the rebuild started.
Everything went smoothly until today.
I wanted to replace that HDD because the size was not as ...
- 11.7k
1
vote
1
answer
241
views
Reassembling MDADM on Live Ubuntu
Background:
I have a 6x 4tb MDADM array on Box 1. Box 1 developed MB/CPU issues that cause a power-down halt about 15-25 minutes into operation, but during the uptime the array is accessible just fine....
- 50.7k
0
votes
1
answer
57
views
trying to rebuild RAID 5 array with failed drive, `/dev/sdc1 has no superblock - assembly aborted`
I have ~20TB MD array spanned across 5 6TB hard drives. yesterday one of the drives failed and the system stopped booting. I'm not very good at Linux, so whenever this happened in the past, I'd simply ...
- 1,893
2
votes
1
answer
409
views
dRAID, Parity 1 + 1 Distributed Spare Better than basic RAIDz2 for 5x12TB HDDs?
Stumbled on dRAID recently and was grokking the docs for OpenZFS on linux and I came away with a conclusion from the chart that I wanted to double check.
This is a brand new system that I'm currently ...
- 151
4
votes
0
answers
158
views
Write speed to NVME disk degrade after some time of active work
I have a fairly general question, but maybe someone already had similar behavior.
I have few servers with 20 nvme micron 7450 pro 15 TB disks on each. On all servers I created raid 0 using mdadm ...
- 41
-1
votes
1
answer
102
views
Is it possible to backup across multiple hard drives?
I'm going to be setting up an 8x20TB ZFS RaidZ2 with no spare. This will give me roughly 100TB of storage for large 3D model files.
I want to purchase some extra HDDs so I can periodically backup and ...
- 2,594
3
votes
6
answers
9k
views
iSCSI Distributed RAID?
Thinking about setting-up as distributed RAID array over iSCSI. Has anyone else tried this, if so what was your experience.
To be more specific I am thinking of a couple of CentOS servers each with ...
- 1
0
votes
0
answers
259
views
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 ...
- 161
2
votes
1
answer
90
views
Is there a way to manually replace one disk in Microsoft Storage Spaces?
I got a microsoft storage spaces which using 4 disks and acting as RAID0, recently I found one of them failed.
I knew I should add a new disk into this space and kick the failed one out, but instead, ...
- 14.1k
2
votes
0
answers
100
views
Disk I/O over 100% (~400%)
I'm working with an Ubuntu OS cluster which is using a Job scheduler. Tens of jobs are running in parallel and all jobs read/write in the same disk Array, 3 SSD disks with software RAID 0. I do not ...
- 121
0
votes
1
answer
4k
views
RAID 5 Physical Disk shows Foreign status on Dell OpenManage
I have a DELL PowerEdge 2950 Server which has 6 Physical Hard Disks.
First 4 HDD are configured as RAID-5, and the rest two are configured as RAID-1.
From last week, third hard disk of RAID-5 shows ...
CommunityBot
- 1
0
votes
1
answer
74
views
Setup raid for a volume group consisting out of 2 nvme drives
I bought 4 x 4tb nvme volumes.
I already tested them and they are doing fine.
Operating system is Ubuntu-server 23.04.
What i want to achieve is the following:
2 drives act as one. (I think that is a ...
- 1,893
0
votes
1
answer
4k
views
Dell PERC RAID array how to ignore error
We have a Dell PowerEdge R720 with a PERC H710 Raid Array. It is configured into two disk groups, disk Group 0 which has the OS and the data, and Disk Group 1 which for reasons unknown to me is ...
- 26
5
votes
2
answers
5k
views
Is it possible to convert RAID1 to RAID0 without system reinstalation?
I bought the E3-SSD-3-32 server from the SoYouStart offer. There is a 3x120 GB SSD drive. Unfortunately, after some time, there was a lack of disk space. Is there any way to convert RAID1 to RAID0? ...
- 85
0
votes
0
answers
92
views
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 ...
- 115
0
votes
0
answers
46
views
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
...
2
votes
2
answers
108
views
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 ...
- 4,514
6
votes
3
answers
2k
views
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 ...
- 4,656
0
votes
0
answers
78
views
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 ...
0
votes
0
answers
173
views
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 ...
- 151
0
votes
1
answer
353
views
Optimal RAID + LVM configuration
I'm new to LVM and RAID management.
I've got a Linux machine (Ubuntu 18.04) with two 4Tb HDDs that are joined into an LVM group. That PC has also two 1.8 Tb SSDs. OS is installed on a separate NVME ...
