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

learn more… | top users | synonyms

0
votes
0answers
30 views

small client-server app & db install location

We're running Server 2008 R2 on dual 2.8 GHz processors with 32 GB memory and a partitioned 1 TB, 3-disc RAID. Seems plenty robust for our purposes. Our primary application, however, has been lagging ...
0
votes
0answers
29 views

Best Reliability for Linux OS: FakeRAID, SoftRAID, or No RAID

I'm tasked with building a highly-reliable, unmanned industrial PC that will withstand unplanned power outages. A UPS will be used where possible, but realistically we know that many of these units ...
0
votes
0answers
23 views

Reset to device, \Device\RaidPort2, was issued

I get this warning log when the windows server 2012 starts backup service that include OS drives. Log Name: System Source: iaStorA Date: .... Event Id: 129 Task Category: none Level: Warning Keywords:...
0
votes
0answers
29 views

3Ware tw_cli utility shows missing port

I'm using the 3ware tw_cli utility to manage a RAID 6 array. Generally, when a drive goes bad, the tw_cli utility will show me the port with the DEGRADED drive. I can then easily identify it ...
0
votes
0answers
32 views

RAID 1 disk sequential read/write speed inconsistent

I have an issue with 2 of my servers, and I'm not sure what's going on. The setup is the same for all my servers: C: 2 SSD 512GB in RAID-1 D: 2 SSD 512GB in RAID-1 The servers are DELL's, the ...
0
votes
0answers
15 views

Add more Drives to a RAID controller using a seperate\another SAS expander or Controller?

I have a custom build server. It currently has an LSI MegaRAID LSI00295 (9266-8i SGL) PCI-Express 2.0 x8 Low Profile SATA / SAS RAID Controller configured with 8 3TB drive in RAID 6. Can I add more ...
0
votes
0answers
28 views

About Raid5/6 merge small files in single stripe element

I have look a lot of articles, but I can 't understand how the raid save some of small files in single stripe element. Here is the raid 5 example: 4 disk * 16K stripe element size = 64K stripe ...
0
votes
0answers
22 views

Dell SAS 6ir suddenly can't find boot devices

I have a Dell Poweredge R300 with a Dell SAS 6ir RAID Controller that's worked perfectly for years. It has two 500gb drives configured in RAID 1. We had a long power outage the other day that ...
0
votes
0answers
30 views

Confusion on how to hotswap dm-x device in software raid

Below is the dump when I do lsblk cat /proc/mdstat lmsetup -ls. So sde is dying and I would like to replace it. What i'm confused is, in lsblk it shows sde is part of md3 (software raid). but when I ...
0
votes
0answers
35 views

Recovering Megaraid Storage Array After Power Outage

I suspect I know the answer to this (namely, that there is no hope whatsoever), but thought I'd take the liberty of asking the question in the unlikely event there may be some hope, however remote it ...
0
votes
0answers
27 views

LSI RAID-100 FILE COPY BETWEEN RAID AND JBOD

Setting up new Lenovo TS-440 server which includes the built-in LSI RAID-100, currently configured with two 1TB drives mirrored and (1) 1TB drive as a JBOD. Can copy large amounts of data between ...
0
votes
0answers
48 views

RAID10 array lost after reboot | Amazon Linux

I carefully followed this procedure to setup RAID10 on Amazon Linux: https://mongodb-documentation.readthedocs.org/en/latest/ecosystem/tutorial/install-mongodb-on-amazon-ec2.html I also upgraded ...
0
votes
0answers
26 views

Linux softraid showing failed drive, but smartctl shows no errors

I have a RAID6 array that is offline (shows 3 bad drives): cat /proc/mdstat Personalities : [raid1] [raid6] [raid5] [raid4] md2 : active raid6 sdh1[11] sdg1[10] sda1[0](F) sdm1[9] sdl1[8](F) sdf1[7]...
0
votes
0answers
36 views

Recovering grub2 after raid1 disk change: stage1 not read correctly

After recovering from a raid1 disk change I cannot install grub2 any more. I think that I recovered from the disk change correctly (the raid array assembles, I can mount and access the data, etc.) but ...
0
votes
0answers
17 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. ...
0
votes
0answers
44 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 ...
0
votes
0answers
48 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 ...
0
votes
0answers
11 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 ...
0
votes
0answers
29 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 ...
0
votes
0answers
443 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 ...
0
votes
0answers
41 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 ...
0
votes
0answers
107 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 ...
0
votes
0answers
48 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 ...
0
votes
0answers
159 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 ...
0
votes
0answers
99 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 ...
0
votes
0answers
12 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 ...
0
votes
0answers
176 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 ...
0
votes
0answers
17 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 ...
0
votes
0answers
534 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 ...
0
votes
0answers
62 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 Count:...
0
votes
0answers
55 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 ...
0
votes
0answers
108 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 ...
0
votes
0answers
114 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 ...
0
votes
0answers
27 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 ...
0
votes
0answers
15 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 ...
0
votes
0answers
32 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 ...
0
votes
0answers
26 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 ...
0
votes
0answers
231 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 ...
0
votes
0answers
17 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 ...
0
votes
0answers
130 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 ?
0
votes
0answers
104 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 ...
0
votes
0answers
41 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 ...
0
votes
0answers
91 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. ...
0
votes
0answers
134 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 ...
0
votes
0answers
127 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 ...
0
votes
0answers
17 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 ...
0
votes
0answers
124 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 ...
0
votes
0answers
105 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 ...
0
votes
0answers
453 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 servers,...
0
votes
0answers
206 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 ...