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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mdadm: Win7-install created a boot partition on one of my RAID6 drives. How to rebuild?
My problem happened when I attempted to install Windows 7 on it's own SSD. The Linux OS I used which has knowledge of the software RAID system is on a SSD that I disconnected prior to the install. ...
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Drive missing from Optimize Drives since upgrade to Windows 10 1803
Since upgrading Windows 10 (Pro) to version 1803, one of my drives is missing from the Optimize Drives list. The drive in question is, my D:-drive, a software-defined RAID-0 (striped) over two disks.
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Parity errors after verify with Intel RST
I have Intel RST RAID 1 running on a Windows 7 machine. I have it set to do a verify and repair every week. I frequently notice parity errors, some weeks over 100 for a 1 TB RAID 1 array. I've ...
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btrfs does not show drive as missing
I am trying out btrfs and I noticed some funny behaviour:
I have two drives in a raid 1 configuration.
sudo btrfs fi show
Label: none uuid: 52b9c6f6-ce5c-4727-861e-e2fd012e475f
Total devices 2 ...
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Average/General RAID 0 "Chunk Size"?
EDIT: this got closed as being "opinion based". i disagree! the facts are, i have to choose one of five Chunk Size options when creating a RAID on Mac. i don't know which size to choose for ...
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Backing up data onto many small disks
Goal
I want to create backups of a large file pool using disks that are too small to store everything.
Description of situation
I have a NAS / home server (running Ubuntu 18.04) with a RAID. The ...
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How to prevent an mdadm array check from consuming excessive system resources?
Once a month I've been doing
echo check > /sys/block/md2/md/sync_action
in order to force a software raid consistency check. The problem is this is a 7.2T RAID 5. The consistency check takes ...
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Size on disk way bigger than expected
I have read Why is there such a big difference between "Size" and "Size on disk"? but why is mine so different?
My RAID5 is set at 128kb stripe, the volume is formatted at 64kb NTFS. I would expect ...
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Rebuilding FakeRAID RAID 5 with new disk, no partitions show up, invalid PMBR
I have a RAID 5 array with 4 2TB disks on a HP Z800. One disk failed and was swapped out for a new one.
I went into BIOS Intel Storage Matrix Utility and set the Array to rebuild with the new disk. ...
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Linux access to Windows 7 dynamic volumes (striped or mirrored)
I'm considering setting up a dual-boot system for the first time for many years. My plan for the system is to set it up as follows:
SSD for both system partitions
2 identical hard disks, split into ...
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How does performance scale in a single column 2-way mirrored storage space as more disks are added?
In Windows 8.1 Storage Spaces, there seems to be pretty solid evidence that 2-way mirrored storage spaces have performance that improves significantly as more disks are added to the pool as long as ...
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Unable to format drives previously used in RAID array - weird 15bit mode
I am clearing out a load of old hard disks, and reformatting them to ensure they are blank. I previously had an x86 PC with BIOS RAID running Fedora and several sets of 4 drives which IIRC were RAID 0+...
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MD RAID 6 with XFS Periodic Kernel Panic -- Possible Kernel Bug?
This now appears to be a bug with the combination of MD and XFS after finding similar kernel panic reports elsewhere. A bug report with Ubuntu has been filed here ( https://bugs.launchpad.net/ubuntu/+...
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mdadm UUID lost after reboot
Here is the problem. I part all disks into 4 partitions.
Use all disk partition one to create raid1(md0). However, after reboot some of the raid members lost, the raid is degraded. Use blkid to check ...
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Synology DiskStation: How to stop/interrupt a running reshape (RAID5 -> RAID6)
The short of it: I have a running reshape from RAID5 with 5 disks to RAID6 with 6 disks which needs to be stopped, so I can power off the system. I do not care if the reshape needs to start fresh once ...
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Can I install Linux on a SATA drive when UEFI is on SSD in RAID mode?
I recently got a new PC with an SSD (NVMe) boot drive and a secondary SATA data drive. After verifying the operation of Windows on the system, I then wanted to try installing Linux on the system.
...
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Linux Software RAID - Migrate from disk device to a partition
I have two 8TB disks configured as RAID1 using mdadm on Ubuntu 18.04 server. They way I created software RAID was on the whole device - /dev/sdb and /dev/sdc - instead of the partition such as /dev/...
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Metadata of the assambled raid inconsistent with the metadata of the individual drives?
We have a raid 10 with two failed drives, with one drive from each set still functional.
When booting into rescue system the metadata seems to be fine and consistent with the expected state.
The ...
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WD Red Pro vs Black vs Gold
I need to replace a failing hard drive in a server which uses software RAID1, and am looking to understand the differences between drive "colors" for possible drives. I'm intending on purchasing a 6 ...
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How do I configure Hardware RAID when installing Ubuntu?
I have a DELL precision workstation which is supposed to have a Hardware RAID controller. However, I have no knowledge/experience with setting up that kind of system. It is currently running Ubuntu 14....
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Unable to reassemble RAID10
I'm not sure if this is the community to ask but I thought I would give it a shot:
Our server that runs a 14 drive RAID10 through a rocketraid 2470 controller refused to assemble. Our goal is not ...
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SSD failed, mdadm thinks the RAID0 array is fine
I have a RAID0 array created using mdadm in Debian. sdf is the drive that died.
$ cat /proc/mdstat
md4 : active raid0 sdf1[1] sde1[0]
468859904 blocks super 1.2 512k chunks
$ mdadm --misc --...
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Independence of SATA channels and ports
I'm working on setting up a simple RAID and am wondering about how independent my SATA ports really are. There are 4 ports on the motherboard, but lspci shows only two controllers
00:0e.0 IDE ...
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1
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iostat numbers wrong when used with mdadm?
See the nubmers below for /dev/sdb1, /dev/sdc1, /dev/sdd1, /dev/sde1:
$ iostat -dxm && cat /proc/mdstat
Linux 3.5.0-17-generic (avarice) 12-12-29 _x86_64_ (2 CPU)
Device: ...
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Use Intel Rapid Storage Technology with a secondary PCIe RAID card
I have Intel's RST on motherboard using RAID1 (2x2TB) and a boot drive. Trying to add another RAID1 (2x3TB) has failed since RST is limited to 2.2TB for RAID1. Now I've bought another RAID card in ...
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Cloning Ubuntu mdadm RAID1
I would like to clone a pair of RAID1 drives created with mdadm. I've tried Clonezilla, but there's no native support for mdadm, so it resorts to using dd which is incredibly slow. I've looked for ...
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How can I find out what RAID block size suits my needs?
I'm building a RAID 6, 8 × 3 TB HDD, ext4 file system, mostly large files – 10GB or more (80%), 10-20MB (10%), 10% smaller files. The RAID contrloller is an Adaptec 6805.
How can I find out ...
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RAID 5 array won't assemble, lsblk shows drive size as 115.5P for all drives in array
I have a raid-5 array comprised of 4 2TB drives that has been operational since 2018. One day I noticed that access was very slow, and the next day it was completely inaccessible. I have an old (2011) ...
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New NAS: Enhancing MDADM against long-term bitrot and random errors
For the last 15 years I was running MDADM(Raid6)+EXT4 under Ubuntu Server on smaller arrays <25Tb. Typically, all my arrays grow over the years, so I was starting with 4-5 drives and ending around ...
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Mounting External Intel Raid Device on Linux Failing, No Suitable Superblock and Read Past End
I have a hard-disk from a dead machine that I'm trying to mount on my Linux machine. For reference, I'm using Fedora 39 and mdadm v4.2. First, I tried just mounting it, correctly showing it's a RAID ...
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Mayhem with partitions and GPT: mdadm RAID overwritten by Windows partition - possible to fix partition table?
dear Community,
I’m writing as I may have wrecked my system up.
I launched disk manager in Windows; as one of my disks was not recognized, and as Windows kindly suggested me to initialize the-said ...
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SATA Card Blocks On-Board RAID Controller
I have a PCI-Express two-port SATA card (from SSU).
It is model SU-SATA3-T2.
I'm installing it in a Dell Optiplex 990. The Dell motherboard part number is 06D7TR.
The card seems to work, but with one ...
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What's most important in a power supply for a video workstation build? Input voltage, amperage, efficiency, or # of SATA connectors?
This is a practice question for the CompTIA A+ exam. I understand from reading other posts that some have strong opinions on this cert, but I'd just like to know why one answer is correct. I've ...
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Raid6 mdadm reshape operation interrupted - now cannot mount or examine
Edit: Once the reshape finished the drive became fully accessible again.
I had a power failure while a raid6 array was being reshaped, and now certain operations cannot be run against it, including ...
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0
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System failure shortly after md raid growth and no md superblocks on added disks
tl;dr; I tried to grow my raid array by adding 2 10 tb disks to an exsistant 4x4TB raid 5 array, had a failure with the system disk (not part of the raid) shortly after the growth finished and after ...
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How to move a Storage Space to a new computer?
Previously, I had installed Windows 11 Pro on a 240GB boot SSD. In addition to the boot SSD, I also had 4x1TB disks connected, configured in Windows as a Storage Spaces RAID5 pool. My boot drive ...
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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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Methods to make a backup of the sytem boot disk, UBUNTU 20.04
I have a system disk that is on my system on a 2TB drive that is a VD as part of a RAID. The other 5 drives are setup as a RAID5. See the screenshot below. The system is probably never going to get ...
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btrfs ls gets invalid root flags
3 months ago, after a powercut, our Synology NAS DS415+ started to reboot to hell, staying 5 minutes up and then rebooting.
We recently tried to recover the data from it,2*3TB SHR-RAID 1.
After a long ...
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Sata 2 vs Cacheless SAS6G JBOD Performance
I have some "old" servers here, using Asus P9D-MH/SAS/10G-DUAL
https://www.asus.com/Commercial-Servers-Workstations/P9DMHSAS10GDUAL/
This board comes with a SAS 6Gbps controller, an LSI SAS2308 ...
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Is there a way to automatically detect new drive blocks and add them to a RAID?
I'm working on a small project that needs to be able to detect any number of newly added drives that have not been mounted, format them, and add an fstab entry to automatically mount them on startup, ...
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mdadm shows inactive raid0 array instead of degraded raid6 after disk failure
I've been running an Ubuntu 18.04 system with an 8-disk raid 6 array, that crashed while having a faulty disk (I only noticed that there was a faulty disk after the crash). The raid array has survived ...
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RAID migration w/ MegaRAID SAS Raid controller
I have a workstation with 8 drive bays and a MegaRAID SAS-3 3108 raid controller. 5 of the 8 bays are populated, and it is configured as a RAID5.
I need to expand my disk-space, and putting in 3 more ...
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Recovering a Synology Raid 0 from Ubuntu (Healthy drives)
I am trying to remount a Synology raid 0 with 3x2GB drives. As far as I know, the drives are in healthy condition.
I simply don't have enough space to do a full image of these before I proceed, so I ...
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1
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Hard Disk Not Recognised by BIOS RAID
Had Windows 7 Ultimate x64 installed on SATA Seagate Barracuda HDD connected to Intel Z68 motherboard processed by Intel Core i5-2500K processor and powered by Corsair VS 550 in a desktop.
12 volts ...
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LVM2 Raid 1 "needs refresh", but does not refresh or scrub
I'm running a LVM RAID 1 on two disks. Here is what lvs tells my about my VG:
root@picard:~# lvs -a -o +devices,lv_health_status,raid_sync_action,raid_mismatch_count
/run/lvm/lvmetad.socket: ...
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How to mount this dd disk image?
I have a ubuntu server where we had a raid1 array of 2 physical hard-drives. Recently the raid array has ceased to mount, I was doing the backup of the data on it with rsync and it begun to give me ...
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RAID5 fails while recovering (mdadm): Any chance to resync?
My RAID5 is going to die because, while restoring a failed HDD, on another HDD read errors occurred and a restore is impossible. I just want to know whether it's possible to restore only a part of ...
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Hardware RAID not recognized by OS
I have a new configuration with the following hardware:
Motherboard: MSI Z270 Gaming Pro Carbon. Firmware is in the latest available version (E7A63IMS.180, 01/26/2018)
RAID controller: LSI MegaRaid ...
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May have just screwed the pooch attempting to follow instructions in another thread to shrink my RAID
I used @Paul (https://superuser.com/users/89018/paul) instructions in his answer to Shrink RAID by removing a disk? but I think I may have made a terrible mistake. Here's the lowdown...
I've been ...
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