RAID, an acronym for Redundant Array of Independent Disks (sometimes incorrectly referred to as Redundant Array of Inexpensive Disks), is a technology that provides increased storage functions and reliability through redundancy. -Wikipedia

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67 views

Solaris 9: Degraded mirror unmanageable with raidctl after drive replacement

We have a pair of Sunfire v20z's (WITH LSI MPT raid) that have each had one drive in their mirrors die. bash-2.05# cat /etc/release Solaris 9 4/04 s9x_u6wos_08a x86 ...
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59 views

RAID1 disks “forked”, now duplicate

I have got a server hosted by OVH, which is configured to have a soft RAID1 array, /dev/md0, that holds a LVM PV. There is another /dev/md1 array, which was supposed to be the /boot, but which is ...
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121 views

mdadm raid10 or nfs performance issues?

I have a fresh mdadm RAID10 device which is healthy, built from 4 x 7200rpm SATA 3 drives: # cat /proc/mdstat Personalities : [raid10] [raid1] md2 : active raid10 sdc3[5] sda3[4] sdb3[1] sdd3[3] ...
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159 views

mdadm error: found two disks with the number 0

Im running a server deep in the forest , and after a hard disco failure i got this error. error: found two disks with the number 0. It a server with 2, 1 TB disc in raid 1 with mdadm 0.9 SDA failed ...
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172 views

Windows Deployment Server Answer Files for PC's with RAID Controllers

I currently have a Windows Deployment Server running on Windows Server 2008 R2 Standard, and so far it has worked without any issues. I am able to capture and deploy images to the majority of the ...
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155 views

Convert single O/S disk to RAID 1 - Ubuntu 12.04 LTS

I have a server running Ubuntu 12.04 LTS with only a single drive. There are 2 more empty hot swap bays in the chassis. I want to add a little redundancy by adding a RAID 1 to the system. The ...
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76 views

zfs with unsymmetric vdevs

let's assume that i have a raidz created from three disks (or vdevs). $ fallocate -l 64m /tmp/one $ fallocate -l 64m /tmp/two $ fallocate -l 64m /tmp/three $ sudo zpool create test raidz /tmp/one ...
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189 views

Ubuntu Preseed Raid 1 with multiple partitions

I intend to create the following RAID 1: Partition Size Filesystem / 20GB ext4 /boot 500MB ext4 swap 2GB swap /backup 10GB ...
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102 views

HP DL380 G7 RAID controller detecting bays incorrectly - port or mobo?

I've been passed a DL380 G7 which appears to work fine (all usual checks come back OK, Linux boots OK, LV creation is OK and disk access is OK) -- except the left hand four bays connected to port 1 of ...
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164 views

raid 5 mdadm drive dropped whilst growing

I have a 4x 2tb raid 5 mdadm array which I had begun to grow onto a 5th disk. ~# mdadm --add /dev/md1 /dev/sdb ~# mdadm --grow /dev/md1 --raid-devices=5 midway through the grow I recieved this in ...
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107 views

FreeBSD raid issue

One of my machines (FreeBSD) has lost its raid (0/ stripe). If I go [root@torry /usr/home/bclark]# gstripe list Geom name: st0 State: UP Status: Total=3, Online=3 Type: AUTOMATIC Stripesize: 65536 ...
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259 views

pvcreate not working: can't open exclusively

After having added 2 disks of 1Tb to a Dell PowerEdge, I went through their initialization with the goal to add them to an existing LVM VG. When the MegaCli background initialization went complete, I ...
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115 views

Debian squeeze server hangs when accessing md raid 5 over network

My debian squeeze server ha begin to hang/freeze when I try to access my md raid 5 over network (via samba or afp/netatalk). This behavior started when I installed netatalk, libgcrypt11 from wheezy. ...
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954 views

Calculating correct stripe size for Linux mdadm RAID10 arrays in “far” layout

I'm creating RAID10 array from 6 drives. When created in near layout, e.g. mdadm --create /dev/md2 --chunk=64 --level=10 --raid-devices=6 --layout=n2 /dev/sda1 ... Checking stripe size as ...
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173 views

Is there an alternative for the Intel WebConsole for managing the RS2WG160 RAID controler on Ubuntu?

I have a server with 16 HDs connected on an Intel RS2WG160 Raid controller and I would very much like to know the state of the disks using the Web Console that Intel provides. The problem is that ...
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426 views

How do I create a RAID10 array using EBS on Amazon?

Basing this question on information I got in Why does df shows only half the size of a RAID10 array?, how should I create a RAID10 array using EBS volumes on Amazon, in a way that will not be ...
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142 views

mdadm LBA mapping

I am trying to write a script similar to mdtrim (https://github.com/Cyberax/mdtrim) for a raid 0 software raid through mdadm. The mdtrim is for raid 1 only at the moment, and it works by writing a ...
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26 views

Raid 10, Logical device are missing

I have a problem with a RAID 10, I have 4 disks on raid. A disc has just been changed (0,3). But I can not rebuild the array. Logical device are setted as "Missing". All commands return to me the ...
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38 views

Ubuntu 14.04 mdadm issues on boot

I have a 14.04 Ubuntu machine which has: 2 x SSD in RAID 1 (md0) 3 x Sata HDD in RAID 5 (md1) The machine is set to boot from the md0 device. This machine has been running fine for a month or so, ...
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32 views

Software-RAID with ext4 but without 64bit support

last year I set up a Software-RAID5 with 5x3TB yielding 12TB of usable capacity. Just today, needing more storage, I have finished growing the RAID to two more 3TB disks: Personalities : [linear] ...
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76 views

SuperMicro 119-7 - Install Problems 'no device driver found'

I have a set of servers that had Debian installed, and need to have Windows Server 2012 R2. Supermicro 119-7 / 10274-WRFT+ MegaRAID SAS 9266-8i Mount R2 in a flash drive, boot from it in UEFI mode ...
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87 views

Dell PERC 6 - virtual drive goes offline because a drive went into the “ready” state

I have a Dell PowerEdge 2950 with four drives, and this raid controller (Dell Perc 6/i): lspci -nn RAID bus controller [0104]: LSI Logic / Symbios Logic MegaRAID SAS 1078 [1000:0060] (rev 04) ...
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45 views

Upgrade Raid 1 to Raid 0+1 and bootloader issue

I am trying to convert my current RAID 1 to RAID0+1 and facing issue in installing bootloader - please have a look what i am doing. My current configuration is RAID1(2*10GB): [root@localhost ~]# ...
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312 views

HP Dl360e Gen8 Not Detecting Hard Drives

I have a new HP Proliant DL360e G8 and it is not detecting the hard drives. We are using both non-hp, and official hp hard drives from an older server (DL120). Hard drives are 3.5" and they are not ...
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42 views

Unable to access disks in rhel 6.5

I work for a biology lab. We recently bought a new microscope that produces an enormous amount of data - it is simply not feasible to store it on a desktop. So, we bought a storage server - the idea ...
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134 views

running commands on physical drives on different backplane with megacli

So when I run "MegaCli64 -PDlist -aALL -NoLog | egrep 'Slot|state|Inquiry|Enclosure'" to grab a list of disks and their status. I can see a total of 36 disks. The issue is that they have the same slot ...
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65 views

Why was the replacement drive for failed drive in RAID 1 (linux software raid) was added as a spare?

I have a two drive linux software raid 1 for a server. There are two raid devices. (Boot (md0) & OS (md1)) Last week one of the drives failed so i ordered a new one. Today i shutdown the server, ...
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42 views

I forget to record the physical disk sequence for MegaRAID before transfer. Is there any way to recover.

I was so careless when I send my server for repairing. I removed disks from chassis to protect the data, but I did not record the position sequence for each disk and my raid card failed to build RAID5 ...
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110 views

Need help recovering RAID 6 array

My CentOS 6.5 server had its primary drive fail the other day. Our hosting company replaced the primary drive and reinstalled the OS. The system is up and running, but the 15TB of RAID6 storage isn't ...
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704 views

How to recover an mdadm array on Synology NAS with drive in “E” state?

Synology has a customized version the md driver and mdadm toolsets that adds a 'DriveError' flag to the rdev->flags structure in the kernel. Net effect - if you are unfortunate enough to get a array ...
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39 views

DIR $file “File Not Found” vs DIR $filedir shows it…not permissions, not USB

I was having this problem before on a USB drive, but now it's happening on my main RAID5-backed hard disk: 2013-10-17 9:37 C:\>dir "C:\Shares\Shared\Reference\Safety Management System\Vid eo ...
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441 views

HP P410 “Parity Initialization Status: Initialization Failed” How to fix?

I'm using HP P410 raid card with BBU with 12 x 3TB drives on RAID50 After a power outage at the datacenter, the hpacucli shows this: Parity Initialization Status: Initialization Failed However, all ...
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189 views

Expand Raid 10 set on MegaRAID LSI 9261-8i

I have an existing Raid 10 drive with 8 drives. 4 in each span. I can't figure out how to expand the set by adding two more drives, one to each span. I'm using the MegaCLI command line tool. I ...
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124 views

Resize a RAID 5 Partition

I'm moving my VG to a RAID, i have 3 disk 600GB, the VG is in the partition /dev/sdc2 /dev/sdc1 1G type linux <-- Boot partition /dev/sdc2 599G type Linux LVM One disk have the VG and with the ...
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490 views

mdadm: Growing a RAID0 Array Weirdness

I have created 3 RAID0 arrays using mdadm on 3 Rackspace CloudServers using Rackspace's CloudBlockStorage as their devices. Each array has their own set of CBS volumes. RS-CBS has an upper limit of ...
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240 views

GRUB is not loading - error: two disks with number 3

After rebooting my Debian 6.0 server I am getting these errors on load (captured it through kvm console): error: found two disks with number 3 error: superfluous RAID member (2 found) error: file not ...
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128 views

Resize virtual disk raid 0 MD1000 Perc 5/e

I've created virtual disk raid 0 of total size 2TB (one physical hdd), what if I will want to add next 2TB hdd into my storage dell powervault MD1000? Can I resize my existing virtual disk without ...
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93 views

Are there any Triple Parity RAID cards commercially avaliable?

I am looking to setup a triple parity raid system. I was searching for a hardware triple parity RAID card to use with a SAS expander from the usual suspects, but could not find any. Are there any ...
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78 views

Expanding raid5 software raid

I have recently bought 4 2TB drives to expand my existing 4*2TB raid5 setup, using mdadm software raid in debian. As a initial step, I have created a raid5 on the four new drives and created an ...
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160 views

Dell PowerEdge R510 SATA drives appearing as SAS

I have a Dell PowerEdge R510 with the following: PERC H700 2 x 500GB cabled SATA drives (RAID 1) 6 x 3 TB SAS hot swap drives (5 in RAID 6) I was testing an online expansion of the RAID array ...
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130 views

SAS RAID Card not accepting disks

I have just purchased a Dell 6/IR SAS RAID card for a Dell SC1435 Poweredge Server that I bought a few months ago on eBay. When I got it, the SAS RAID card fitted (a 5/IR) was faulty and it was ...
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263 views

Linux CLI program to verify/control nVidia hardware RAID?

I have a server with a Supermicro motherboard that has an nVidia RAID controller on board. When I boot up, I can hit F10 and see/modify the RAID settings. However, I don't want to reboot this server ...
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95 views

Is it possible to upgrade physical disks in raid using hpacucli?

Is it possible to upgrade a RAID volume using hpacucli? For instance, i have a 4 disk Raid-10 array. If i replace each disk (of course allowing the raid to rebuild in each case), after all 4 disks ...
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126 views

Corrupt XFS header

On my file server I ended up growing the RAID (5) and then I went ahead and deleted and remade the partition holding the XFS filesystem. I used Parted to do this. After parted ran I tried to mount ...
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131 views

mdadm drive UUIDs chanaged, can they be changed back?

So I ran into this trouble and I believe I lost all my data..However I found an old mdadm --examine --scan file I made a month ago and an old mdadm.conf....Is it possible to use these two items to fix ...
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85 views

Multiple groups of RAID devices in btrfs

In btrfs, is it possible to have multiple groups of devices, and each group is in different btrfs RAID? For example, 2 devices in raid0 and 4 in raid1?
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178 views

Possible bad raid card / hard disks (LSI 9261-8i)

I am in a bit of bad spot at the moment, i have a dedicated server hosted by someone else, it has a LSI 9261-8i raid card installed, attached is: 3x300GB SAS 15K rpm disks (in RAID5) 5x2TB SATA ...
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234 views

Restoring a GPT XFS partition?

I recently added some storage to a RAID array with a single large XFS volume. To expand the volume I normally use parted to remove the partition and then recreate it so that it spans the entire ...
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106 views

What should I know before I set up RAID 6 on Linux?

I just ordered five 1TB drives to install as a RAID 6 array in a Linux server (keeping the existing 1TB drive as a boot disk). I want to use Linux MD for RAID rather than a RAID card, to avoid ...
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200 views

RAID disk not booting

my hosting facility replaced disk /dev/sda for me and I've added it to the RAID via sgdisk -R /dev/sda /dev/sdb mdadm /dev/md0 -a /dev/sda1 mdadm /dev/md1 -a /dev/sda2 mdadm /dev/md2 -a /dev/sda3 ...