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Questions tagged [raid5]

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2answers
192 views

Help recovering a raid5 array

A little bit of background first. I store a bunch of data on a Thecus N4200Pro NAS array. I had gotten a report that one of the 4 drives in the array was showing smart errors so I swapped out the ...
3
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1answer
95 views

How to restore RAID5 Array

I have a RAID5 array consisting of 3 identical 2TB drives. Suddenly GRUB wouldn't boot anymore and gave the error out of disk. Eventually booted a livecd and ran some mdadm commands: mdadm --examine ...
3
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1answer
395 views

Raid 5 rebuild with wrong stripe size & no failed disks - is data lost?

I'm curious if there are hidden complexities to RAID5 and RAID5 rebuilds. My understanding is that (in a 3 disk array) a rebuild would just directly compute the parity of disks 1 & 2 and write ...
1
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1answer
45 views

rebuilding mdadm raid5

I've dusted of a machine of which I want to repair an mdadm raid5 that I messed up. First the raid5 was 3 disks. A spare was added, just before one of the three started to fail. Spare one got used and ...
1
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1answer
118 views

How do I work out what's trashing my RAID?

I have an x86_64 Ubuntu 17.10 install (stock 4.13 kernel) with an SSD and three 1TB WD HDDs which each have a 750GB partition that's used in a 1.45TB RAID5 array. The SSD has my / on it, and the RAID ...
1
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1answer
290 views

Recover RAID5 array after partitions deleted

I have (had) a large RAID5 array (3x8TB) up and running on Ubuntu 16.04 using the guide on the following page: https://www.digitalocean.com/community/tutorials/how-to-create-raid-arrays-with-mdadm-on-...
1
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1answer
55 views

RAID-5 array degraded, seems like >1 failure; can I recover without data loss?

I just installed Fedora 22 fresh, onto system with existing RAID-5 array. Five drives. Kernel reported device errors overnight, the 3 TB XFS filesystem was unmounted, and now after a reboot the ...
0
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1answer
538 views

Add hot spare drive to Intel RST (onboard RAID)

I'm using 3 disks (RAID5) and want to add a spare disk (dev/sdd). The system is using Intel RST (onboard RAID), and can be recognised by CentOS7 and mdadm command. But I tried many methods, and cannot ...
0
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1answer
285 views

Replaced drive not syncing in RAID5 configuration (shows as spare)

I've a RAID5 configuration (4 drives). One drive failed, showed up as a failed device in mdadm. After rebooting, the failed device didn't even appear in mdadm. The RAID5 config only had 3 working ...
0
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1answer
44 views

RAID5-4 devices with 2 failed devices: hope to retrieve data?

I built a RAID5 array with 4 2Tb devices a few month ago. - I used LVM2 to build partitions. - I also used GRUB2. - Finally I installed Debian. For an unknown reason the RAID failed. The BIOS "see" ...
0
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1answer
129 views

Cannot mount RAID 5 disks

I am trying to mount 3 x 2TB RAID discs from an ubuntu server, but I cannot. I know that these disks were used in a server using RAID5. I tried to mount them using mount -t but I was unable to specify ...
0
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1answer
72 views

Redhat 5.11 Just showing 1.5TB Storage

We purchased new supermicro server with 3*3TB HDDs. Now from Hardware Raid controller i created Raid 5 .So the total use able storage is 5TB something. But during installation Redhat is just showing ...
2
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0answers
192 views

How to recover data from synology Raid 5?

My old synology server (cs407s), died. So I'm trying to retrieve the data from the disk. I have tree disks from RAID 5. I tried to mount the disk on computer running grml. # lsblk sda 8:0 0 ...
2
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0answers
1k views

Arch Linux Server: How to spin down HDDs in a BTRFS Raid5 configuration?

This is my first question here; after extensive research I had to reach out for help. I’ve build a home server based on Arch Linux. It basically has two main purposes: running a Plex Media Server and ...
2
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0answers
387 views

RAID5 Arrary disappeard with no HW or SW changes made

I have a R-Pi running XBMC (Linux CaribNAS 3.10.24 #2 PREEMPT Mon Dec 23 05:18:12 UTC 2013 armv6l GNU/Linux) with a 3 disk raid 5 array that has been working up till yesterday when is stopped running ...
2
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0answers
158 views

Rebuilding a raid5 array from images

I have an 8 disk possibly raid5 array that was part of a fried NAS, the whole thing uses pdc20265 promise chips and some kind of embedded system on a small ide board. No clue if the board is anything ...
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0answers
286 views

Unable to mount raid 5 (Intel fakeRaid)

I recently corrupted my linux distro. I then reinstalled Ubuntu 16.04.3 and after setting it up, I have been unable to mount my Raid 5 setup after extensive troubleshooting. Note even after the ...
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0answers
238 views

need to rebuild mdadm raid5

I've got an mITX nas running Arch with a Raid5 mdadm softraid. Lasttime it booted correctly Aug 19 11:30:21 nas kernel: md/raid:md127: device sdc1 operational as raid disk 1 Aug 19 11:30:21 nas ...
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0answers
32 views

Can 99-raid-check weekly cronjob be scheduled to run in increments?

I have a raid5 on UNIX. Can I somehow automatically schedule the weekly 99-raid-check to run in increments? During the day it affects the performance, so I don't want it to be doing its check during ...
1
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0answers
196 views

RAID5 needs drive to be added every reboot

I have a 3 disk RAID5 mdadm array total 4TB on an Ubuntu Server 14.04.3 LTS. Since a kernel panic caused by an already replaced device unrelated to the array, after every reboot the array starts [UU_]...
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0answers
189 views

mount LVM RAID 5 with missing disk

I have a software RAID 5 (LVM, XFS) with three 2 TB drives. Is it possible to mount the RAID with one missing drive (instead of having to rebuild it)? How would this be done? [Edit] My /etc/fstab ...
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0answers
559 views

Recover data from a BTRFS RAID5

I have a BTRFS RAID5 setup (no mdadm) with four disks (the fifth failed). Now I am trying to recover the files but as soon as I try to rsync the files over to another disk, the system hangs after ...
1
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0answers
1k views

Help with lost software RAID5 on CentOS 6.5

I've been searching for hours and giving up / too scared to delete all my data. I have a file server running CentOS 6.5 which has 4 WD RED 2TB drives (all > 1 year old) in software raid 5 with mdadm, ...
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0answers
619 views

How to put in new disk in a MegaRAID SAS 2108 HW RAID card?

It's in RAID5, we already have 4 disk in it. 1 is a spare. 01:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator] (rev 05) with 4 disks. Question: How can we put in ...
0
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0answers
985 views

mdadm raid 5 missing partitions after reboot

I had a working raid 5 array that had a whole debian install on it (I set it up during a debian install). I'd been using it a couple of days, all was fine, but since I created it during debian install,...