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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12 views

PERC controller and all 12 hdds in RAID6

i have a question about my DELL ds12-nv7, the controller RAID is perc 6i, i have 12 hdd. The card controller has 2 controllers. I can see that i have 8 hdd on controller 0 et 4 hdd on controller 1. ...
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34 views

Having trouble mounting an mdadm array. Corrupted Filesytem?

I have a server that crashed and won't power on. I don't care about the server, but I'd like to recover the data attached to 2 external usb drives that were mirrored (raid 1) using mdadm. This system ...
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29 views

Server Frozen - RAID Card throws PD errors and BBU missing

Our server runs Win Server 2008 R2 and has an Intel Raid Card. We have been seeing PD errors from it. The PD errors have appeared on 2 drives out of the 8 in the system. We also saw errors like these ...
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7 views

LSI- Consistency check keeps restarting after completion

I have an Intel/LSI controller that keeps looping a consistency check after the creation of a RAID10 or a RAID6. All of the disks are fine from what I can tell (SMART is good, and they all pass ...
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23 views

Cannot restore RAID 5 configuration

We have recently come across a problem and we would like your input on what is the best way to solve this. We have a QNAP TVS-871 and it was configured as a RAID 5 Storage Device. Today the system ...
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224 views

Using Dell PERC H330 RAID controller with not-dell-certified SSDs

we think about replacing our Dell PowerEdge T100 (2009) with a Dell PowerEdge T330 for our small business. Up to 15 clients are using the MSSql Server, some fileshares and printers. The database size ...
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22 views

How to match a drive seen by esxcli to the virtual drive seen by RAID storcli

I have a small project to collect the RAID-level information on VMware ESXi. I have a ESXi host with LSI RAID controller setup. I'm able to run storcli on the host to get the RAID controller ...
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61 views

Btrfs multiple devices with dm-cache

Unlike md-raid, when you create a btrfs file system with multiple devices, there is no special block device exposed (ex. /dev/md0). With the lack of built in cache support (ex. L2ARC), can one set up ...
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18 views

How to backup mdadm RAID superblock info?

I'm Looking for a simple command that will backup the mdadm superblocks on a RAID volume. A quick way to scan you system would be: mdadm --examine /dev/sd[a-z]* > raid-volumes.txt Now after ...
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104 views

Got kernel panic with 3w-sas driver after kernel update

I use CentOS 6.7 and I've got kernel panic related to LSI 3ware 9750-4i Controller after kernel update from 2.6.32-431.17.1.el6.x86_64 to 2.6.32-573.12.1.el6.x86_64. It is minor update, so I think it ...
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47 views

How add drive to array using LSI Megaraid Storage Manager

I have an LSI 1068E raid card, with 4 disks, configured as 2 RAID1 pairs. I'm not sure how, but I've ended up with a pair in a degraded state, and one of the disks from that pair shows as ...
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10 views

Raid Array disappeared and a reboot made it return.

We have an LSI raid card in a RAID 6 configuration. Yesterday our NMS system reported a problem with the machine and on investigation the drive was missing from Windows. Disk management didnt report ...
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121 views

XenServer 6.2 VM Performance (SSD, RAID-10, Quad-core)

Greetings everyone :) My configuration is the following: HP C3000 tower enclosure 1st HP Proliant BL460 G1 quad core xeon 2.66GHz 12MB L2 cache, 24GB RAM, BIOS I15 5/2/2011 partnered with HP ...
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16 views

Debian 7.9 with RAID 1 3w 9750 slow disk transfer

I have very strange problem with RAID 1 on Debian 7.9 every disk operation read or write is very slow. I have tried to copy one 240 MB folder it take more than 4 minutes. The RAID controller is LSI ...
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367 views

Replacing failed RAID 1 drive on Windows Server 2008 - new drive not bootable

I'm trying to replace a failed RAID 1 drive in Win Server 2008 R2 Foundation and am running into difficulty. See the image from Disk Management: Disk 0 is the good drive from the original RAID ...
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39 views

How to get information why I cannot set a HDD to unconfigured(good) with megacli

Having this HDD in state unconfigured(bad). Enclosure Device ID: 32 Slot Number: 2 Enclosure position: N/A Device Id: 2 WWN: 5001F830xxxxxxxx Sequence Number: 6 Media Error Count: 0 Other Error ...
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49 views

SSD Raid 10 Slow write speeds

We have three IBM servers running windows 2012, all identical, they have a Raid (10) of SSD's. However one of the boxes seems to only be able to write at a third of the speed of the others. The other ...
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78 views

RAID 10 Unexpected sense followed by Initialization corrected medium error

The MegaRAID controller on one of my servers just started spamming Information messages this afternoon. It will send six to ten Unexpected sense messages from PD: 7 followed by roughly the same amount ...
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86 views

“personality does not support diskops!” when trying to add a drive to a mdadm raid array

I have a linux (3.19) server which uses software raid (mdadm v3.2.5) and there is a raid0 device (/dev/md2) set up, which currently has only /dev/sdb3. I want to add the unused disk /dev/sda3 to this ...
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26 views

Hot Swap Disk With One Disk Failed and One Predictive Fail in Same Array

I have a RAID 10 Array sitting on a HP Smart Array P410i controller. One disk has an error status and one has a predictive failure status. Is it safe to replace the predictive failure disk and then ...
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14 views

Error while mounting /dev/md0 on aws instance

I created an instance with 16 EBS volume in AWS. Then I created RAID and mounted to one of the directory and loaded some data. I detached the volumes and terminated the instance. Again I created an ...
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28 views

What are these raid errors?

I installed a new server with two sets of mirrored RAID 1 drives. The system sees 2 1TB drives, each of which is a mirrored set. This is a software raid (no hardware controller) done at BIOS level. I ...
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24 views

Identify which windows drive is mapped to a raid array

My Windows 2012 server is hosting a LSI 9260 RAID card that is in turn hosting 2 logical drives of 1TB each. The drives are mapped to D: and E: respectively. To add more space to the server I need ...
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188 views

wrong # of devices in RAID set on Centos 6.7

I just set up one of our servers with Centos 6.7. It's a machine that hasn't been in use for at least a year. I had to set it up a couple of times but every time one of the problems was with the ...
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16 views

Dell Disk Group Configuration for Microsoft Business intelligence

I'm looking to configure a couple of 12-core 64GB Dell R430s for business intelligence using Microsoft Analysis Services (and SQL Server in the night time). One will be production, and the other will ...
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92 views

How to reset Areca RAID card built-in SAS expander password?

I just bought used ARC-1882IX-12 card but the seller forgot password to the SAS expander. The web management worked well with default "0000" password. How to reset it ?
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79 views

HP Proliant ML310e Gen8 with Windows 2012 lost RAID data?

I'm having some problems where a client had a fire in the power strip feeding the UPS to their server. When I got there the HP Proliant Gen8 server had been booted and was sitting at a setup dialog ...
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148 views

Dell Power Edge 2950 SAS RAID configuration

I have been given a Dell Power Edge 2950 by the company I do service work for to use as a backup server. When I first got it there was a message saying "PCIe Training Error Slot 1". I managed to get ...
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33 views

Need to make change to fstab when read-only

I am configuring RAID and filesystems. I had to create /dev/md1 with RAID devices /dev/sda5 and /dev/sda6 on them. Next I needed to edit /etc/fstab, so that /dev/md1 mounts on boot. I made the ...
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77 views

Ubuntu MaaS RAID preseeds

I have a maas server/controller and I need to create RAIDs when I commission the nodes via preseed_master config file. The disk configurations would be 3 disk, 2 disk, or more than 3 disk per node. ...
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109 views

Smartctl output varies; some RAID does not contain attributes

I have run smartctl -a on five different computers (mostly CentOS 7 Linux with smartctl 6.2), and I noticed two styles of smartctl output. Why would it change its output format? One style contains a ...
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104 views

Replace failed disk in RAID 1

two days ago one of my two drives in my software RAID 1 (that was setup using gnome-disks) configuration failed. I could not access the files in the meantime. After short research it seems that I have ...
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16 views

Unable to build RAID on BladeServer HS20 8843-2RG

i have a bit of a problem. We had this Blade Server come in a few days ago, with a seemingly failing disk (the OS cried out IO Error all over the place and only booted into emgergency mode). A quick ...
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96 views

The RAID array shows up as DEGRADED, but all drives are OK

The current RAID controller I am using is an AMCC 3ware 9690SA-8I SAS RAID Controller. I have just received this server unit used, and going into this blind; I have no idea how long it has been this ...
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92 views

Growing RAID0 to RAID5 sync delayed

I've recently switched my NAS with a single 4 TB disk to a RAID setup, with the goal of implementing a 3-disk RAID5. To do this without a 4th disk and without loosing my data, I first set up the 2 new ...
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360 views

With Adaptec's arcconf utility, why can't I make the 'identify' command work (Adaptec 6805 controller)

I've got a pair of Linux servers with Adaptec 6805 RAID controllers in them. One is running CentOS, one is running Debian. I have the Adaptec command line utility 'arcconf' installed on both ...
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169 views

RAID-6: Two drives failure with 3ware 9650SE

We have a 6-drive RAID-6 on one of our servers. Each drive is a 750GB Seagate, and they are connected with Hardware RAID card 3ware 9650SE. We do not have sparse drives. The system is old and probably ...
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197 views

How can I find out my centos RAID setup, with a LSI MegaRAID SAS 2108 controller?

I've bought an auction box from Hetzner which allegedly has 4 3TB drives in it. As a relative newb to this sort of thing I just want to see some reassurances on the command line that this is all ...
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42 views

Server reverted to may after reboot

I just had a problem on a client's server, it wasn't responding to anything so I forced a reboot. The client called shortly after to say the website reverted to a version from May. Checked the backups ...
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399 views

How to repair multiply-claimed blocks?

I get a lot of the following logs in dmesg: [26159.277230] EXT4-fs error (device sdb1): ext4_iget:3875: inode #394497188: comm mv: bad extended attribute block 22794025699896 [26219.914802] EXT4-fs ...
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68 views

ZFS - Reconnecting a disconnected but fully intact disk

If a disk gets disconnected from a ZFS array, but the drive itself if totally fine, what happens when you reconnect it? For example, if I have a mirror of 2 drives, if one is disconnected, then ...
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400 views

Mount a NTFS Raid0 disk under linux debian

In my new laptop I have a a RAID 0 configuration with a normal disk and a smaller SSD drive. I have removed the dvd bay and replaced the dvd player with a 256 GB SSD drive where I run linux debian. I ...
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23 views

Outdated files after Server 2008 RAID1 failure

I have a server running Windows SBS 2008 with 2 HDDs in soft RAID-1. Today some kind of RAID crash occured - the server could not boot saying there're no bootable device. I removed both drives from ...
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231 views

Popped in replacement harddrive in RAID 1 configuration; Seeing I/O but the drive is not recognized by OS or RAID controller

CentOS 5.11; Dell PowerEdge R410; Dell SAS 6/iR Integrated Blades RAID Controller. Have two drives, both in a RAID 1 array. First drive failed. Pulled it out and popped in a new drive (same brand ...
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94 views

MD RAID Array Often Starts Without All Drives

I find that, when I start/restart my system, my MD array often doesn't start with all of the drives even though the device-names haven't changed at all. I'll have to stop the array and reassemble it, ...
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213 views

LSI Raid controller: identifying failing hard disk (MegaCLI)

Info: I have a LSI 9265-8i controller. It's been running pretty well for two years. More recently it looks like a drive may be failing - no errors reported and no media issues reported when viewing ...
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94 views

How to change bootable logical drive via arcconf (Adaptec 6805 controller)

I've got an Adaptec 6805, with two RAID 6 arrays attached - 4 drives each. I'd like to change which of the two is the one that it boots from. Is there any way to do that with the Adaptec 'arcconf' ...
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190 views

Dell C2100 - Replacing Per 6/i with Perc H200

I have been googling a bunch this morning and am having a hard time verifying that my setup is going to work and was wondering if i could get some quick feedback/advice. I have a Dell C2100 which ...
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36 views

Proper Partition Alignment

I'm trying to follow the advice from this TechNet article about partition alignment. Our San is an EMC, the disks are in a 4 disk raid 10. This services an I/O intensive application, 60:40 write:read. ...
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56 views

How to diagnose RAID drive showing incorrect size

I have a software RAID1 array on Ubuntu 14.04. Each drive has 1TB, for a logical size of 500GB. Suddenly, one drive started reporting it only had 4.1GB and I can no longer run any SMART self tests on ...