Questions tagged [raid]

Redundant array of independent/inexpensive disks; a technology which utilizes multiple disks to provide increased reliability, performance, and/or redundancy. Can be implemented either in software or with a hardware controller.

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Changed from AHCI to RAID and now Windows won't boot

I've got 2 SSDs, one for Windows and one for Linux Mint. I have another 4 HDDs I turned into a RAID 0 array via my BIOS. Mobo is ASUS TUF X570. I had the 4 HDDs in a Microsoft storage pool but started ...
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Recover Synaptics Raid 6 after Mainboard Fail

I have a Synology DS415+ NAS with four drives setup as RAID 6. The device is rather old and the soldered-on CPU has had some problems before (specifics don't matter to this question), so I don't know ...
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Choosing RAID mode rather than AHCI/SATA mode?

Currently studying how computers work, I came across the last paragraph of the answer of this link: Many SATA controllers can enable AHCI separately or in conjunction with RAID support. Intel ...
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RAIDXpert2 LECACY array gone! What i should do?

So big story short, i built a PC a few years ago and got a 14tb HDD to go with it. Since then i wanted to buy another one after i had the funds to make a RAID 1 array for redundancy. I got the 2nd ...
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mdadm raid gone after reboot due to super blocks disappearing on all but one drive

I have a raid 6 on /dev/md0 using /dev/sda /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf. I moved this raid to a different motherboard but kept the same non-raid card, and all drives including the OS ...
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SAS/SATA 6G Raid Controller (Mini SAS 8087) and a 12G (Mini SAS HD 8643) SAS/SATA Backplane

I want to know if I can use a SAS/SATA 6G (Mini SAS 8087) Controller with a 12G Backplane (Mini SAS HD 8643) using a SFF-8643 TO SFF-8087 Mini SAS Server Data Transmission Cable 1M. Below is pictures ...
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Raid array degraded after reboot

I do not know if cross-posting is allowed, but i waited 2 weeks and sadly got now answer or could solve my problem by myself. In Short: Everytime I have to re-boot our PC the RAID-6 array consisting ...
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Retrieve TBW / Total LBA Written using RAID 0

I have two SSDs ( WDS500G1B0A-00H9H0 ) in RAID 0 and I want to know how many terabytes have been written on them so far. However, the Total_LBAs_Written attribute gives me an incorrect value ( < 50'...
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mix SAS and SATA HDDs in RAID 0

Spec for LSI 9261-8i says that it's possible to mix SAS and SATA disks in the same RAID array but such practice is discouraged (but without explanations why). What will be consequences or drawbacks?
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Can I partition a RAID 1 drive to replicate data that is now on multiple drives?

I am getting this Western Digital RAID 1 array (https://smile.amazon.com/gp/product/B074R59TLB/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1). Currently I have data spread across three internal ...
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I can't get a new WD SSD to work with WD HDDs in RAID configuration

Currently I have 1 HDD WD Black 1TB for the OS on SATA1, and 2 HDD WD Green 2TB in RAID 0 on SATA3 and SATA4. Everything works fine. SATA1 to SATA4 are in RAID mode. SATA5 and SATA6 also in RAID mode. ...
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Raid missing after restart with error message cant start dirty degraded array

I have a 10 HDD raid 5 and an SSD install drive. I restarted my NAS running OMV and now my Raid has disappeared. I got the above error message so I went through all my connections. Restarted again and ...
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Issues while installing Windows 10 Pro on asus x99-e ws with raid 1 setup

I have this PC im trying to install Windows pro 64bit on this setup but im totally stuck cause of many problems. Here's some specifications: Supply - Corsair HX750i MB - Asus X99-E WS CPU - Intel ...
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mounting a RAID in /etc/fstab

Hi I have a raid mounting in /etc/fstab /dev/md/debian\:0 /home ext4 defaults 0 0 but if I do mount -a It gives me error mount: /home: special device /dev/md/...
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mdadm: RAID gone after reboot, partitions gone, service masked

Some weeks ago I set up a software RAID 1 with mdadm, consisting of two 2TB WD Red HDDs, as a backup medium (Debian Stable). Everything works, I hooked up everything for it to come up after a reboot, ...
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Software SSD Raid Migration

Recently my laptop crashed and I am trying to get some data from it, the problem at hand is that the main hard drive were 3 Lite-On LMT-128M6M 128GB Mini PCIe mSATA SSD 30x50mm binded together in a ...
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ZFS convert from RAID10 to RAID1 (mirror)

I have a ZFS array with 4x4TB, configured in a RAID10 so that it's two mirrors striped together. I want to convert this to 2x10TB, so I want only one mirror that consists of the two disks. Is there a ...
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Rebuild RAID with Old HDD in Synology NAS

From a Synology NAS with two bays, one of the HDDs has been removed. The remaining HDD is working fine as remaining part of the degraded RAID 1. Is it possible to re-add the once removed HDD in the ...
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HDD replacement from a RAID system

Recently I had a problem with some HDD installed on a old Linux machine (2009 or so). The disks were installed on this machine with a RAID system (I was told that it was a RAID 1, the RAID controller ...
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MDADM array rebuilding after every reboot

I have just grown my RAID-1 mirror in to a RAID-5. After adding a 3rd disk, the array rebuilt successfully, but after restarting the array was showing as inactive, and the new disk (sde) had lost all ...
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LINUX mdmadm arrays - what are counted as “Events”?

I'm really unable to understand what the "Events" counter displayed in mdadm "detail" view is about. It seems that it's related to events happening at the superblock level, that ...
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How to calculate the number of disk in RAID 1,5,10

What is the formula for working out the total number of disks in RAID 1,5,10 array knowing the final RAID size/capacity? I would really appreciate your response Thanks
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How does RAID 2 bits look like on different amounts of drives?

So I wanted to learn about how RAID 2 works and as it says, "RAID 2 stripes the data by bits across the drives along with Hamming Code/ECC," and to the left of the paragraph it showed 7 ...
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CentOS 8 - RocketRAID 2720 non raid bios, driver installation issue

Im trying to install the highpoint driver for the RocketRAID 2720 HBA.I want to use the attached drives as individual block devices in linux. For that i have flashed via freedos the "non-raid&...
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After RAID sync can I be sure disks are exact copy?

I have a 2-bay Synology NAS with SHR (synology hybrid RAID) configuration. I replaced old disks with 2 larger new by making 2 RAID re-sync as described in this article by synology: turned off the nas ...
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How exactly do btrfs/ZFS (and related filesystems) prevent bit rot?

It seems that, since btrfs development began, various communities have touted both it and ZFS as inherently more advanced filesystems for preventing corruption, bit rot, etc. What features of btrfs or ...
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Can't clone my old Windows 10 system to RAID 0 in new build

Going crazy trying to get my new build to boot. I need to restore my old system from an external usb drive to a RAID 0 created in the new motherboard bios. I’ve updated the raid drivers in Windows ...
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¿Does a RAID array persist through multiple OS installations?

As title said; i'd like to know if a Windows-made software RAID array will persist a new installation, if I could read that RAID with another Windows partition or installation and if other OS could ...
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2Tb seagate harddisk is not showing all portions and incorrect size

I have hpz800 bios version v3.16 i have connected sata 2Tb hard drive Its showing only in Raid mode as 2Tb But in IDE mode its showing 14.6gb only wby is that? Happening If i choose raid mode then i ...
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can't mount raid5 array after powercut

Had a powercut recently and that crashed my raid5 array. I followed the advice here https://raid.wiki.kernel.org/index.php/RAID_Recovery and tried to -force assemble (as the events were within 50 of ...
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Checking/fixing RAID 5 Directories

I'm running a RAID 5 array with 10 disks on ubuntu 18.04 LTS.I recently had a drive fail due to a faulty cable. After fixing that I ran into another issue where another drive showed as faulty, but it ...
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Is it possible to configure a SATA RAID 1 hardware array on X570 without losing data?

So i basically got a 2nd identical SATA HDD to the one i use to store my bulk data (note OS/system drive is on a different nvme m.2 sdd). Is it possible to configure a RAID 1 array with the new HDD on ...
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Filesystem/LVM config that will prioritize “wearing out” smaller drives first

I've built a janky NAS box for myself that has a wide range of storage device sizes (20GB to 4TB) and all mashed together with BTRFS on Debian Linux. I've noticed that BTRFS will prioritize writing to ...
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What happens in raid 1 when a disk becomes full?

To start I'm pretty new to this stuff so I might be asking a question with an obvious answer here. But let's say I had two hard drives in raid 1: a 4tb drive and a 8tb drive. If the 4tb becomes full ...
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Unplugging the drives in RAID 1 and boot from USB Linux without using drives

I have three drives in my PC - one SSD with system and two HDDs in RAID 1 for data. For some time I started mining cryptocurrencies a little bit on my PC. Now, I would like to boot my PC just from USB ...
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MDADM raid6 huge mismatch_cnt

I have a problem with mismatch_cnt being huge (over 100000000 and more) on a raid6. /dev/md0: Version : 1.2 Creation Time : Sat Jul 27 22:30:18 2019 Raid Level : raid6 ...
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How to Partition a Single HDD With Hardware RAID 0

I have one SSD and one 10TB HDD. All the OS stuffs (e.g. /, /root, /var, /usr, etc) are on the SSD. And for a very dumb reason, I have to attach the 10TB to a RAID card (LSI MegaRAID SAS 9260-8i). ...
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Modify a Ubuntu dkms file to Debian

Hi I was trying to install this kernel patch HP p410i. https://medium.com/@terryjx/enable-it-mode-on-hp-smart-array-p410i-raid-card-on-hp-dl380-gen7-servers-4e827eeb78ca On following this guide I was ...
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Enable IT mode on HP Smart Array P410i RAID card on HP DL380 Gen7 servers

I am trying to run hpsahba on a Debian VM before I try to use the tool on my Debian server. Please tell me how to permanently patch the kernel linux 5.10 I am very new to linux please help me with ...
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Hello ! I've got a Raid system drive fail ! I want to rescue the data

The Laptop doesn't boot any more .. I bootet with a usb stick .. diskpart finds the whole harddrives as one .. but empty .. notepad doesn't find any harddrive .. except the 35 mb ram .. I tried to ...
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Is bad memory an issue for Windows Server Software Raid 5 resync?

So, I have a setup at home where I run a Windows server 2019 running a Software Raid 5 setup running over 5 disks created through disk manager. Since this is a home system, I haven't really found ...
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Why does my PERC H310 raid card not report any progress upon rebuilds?

I have an old Dell Poweredge R320 with a PERC H310 Controller, the Poweredge has the basic licensing so I currently can only access it from the controller BIOS. I've created a basic RAID5 array from 4 ...
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Need a Encryption on RAID Array and Maintain Performance

On my Win 10 20H2 workstation I'd like to encrypt drive D: - a big 4 TB RAID data volume. The volume is made from 4 x 1 TB Samsung NVMe drives mounted on a Dell Ultraspeed PCIe card. Unencrypted file ...
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Windows 10 - Inaccessible Boot Device & RAID

My PC has 5 hard drives. 3 are set up in a hardware RAID in the BIOS (I will never do this again, believe me, but I have it for now). My PC lost power the other day, and when it came back on it booted ...
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How to stress test a Synology NAS HDD?

I'll soon be getting my DS920+ Synology NAS setup with two Synology HAT5300 HDDs. I would like to put these two HDDs into a stress test before running my NAS setup. This is my first time to setup up a ...
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Can you return old RAID 1 disks(and keep all the files on them) to Windows Server machine if migrating to new disks fails?

I'm looking for some help regarding RAID 1 and migration to bigger disks. Here is the thing. I have to migrate Dell PowerEdge T30 disks that are in RAID 1 to new and bigger disks. From what I ...
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How to fresh install Debian to RAID0

I want to install a Debian variant to my notebook and I'm using the GUI installer. The computer "only" has 31.2GB of internal storage but it also has a built-in micro SD card reader (that ...
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How to combine a bunch of different sized SSDs into one volume in Windows?

I have six old SATA ssd of different sizes and brands (100 to 512 GB) collecting dust in a drawer. I would like to put them into my PC as one large JBOD volume, and use this for installing Steam games....
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How to rescan a SATA hard disk devices in a RAID array remotely from the main server it is connected to?

I have the RAID 5 system in 4bay-hdd-case with a SATA cable connected to main server. Cach drive is registered like these /dev/sdj3 /dev/sdk3 /dev/sdl3 /dev/sdm However suddenly, /dev/sdj3 seems to ...
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How are writes allocated to disks in raid 0 when the disks are on interfaces of different speeds?

Take a server with three USB ports - one USB 2.0, and two USB 3.0. There are three identical USB disks configured in RAID-0 with mdraid, each plugged into one of the three USB ports. When data is ...

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