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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3
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1answer
232 views

Filesystem performance degraded during RAID rebuilding

So quick question - our RAID6 array is currently rebuilding and there is a VERY noticeable filesystem performance hit (home directories are NFS mounted on the array). I'd sort of expect that, given ...
2
votes
2answers
1k views

Unable to create datastore extent on VMware ESXi 5.5 - HP Smart Array P800

I have a HP P800 array controller connected to a HP MSA60 with 12x 1TB SATA drives installed. I provisioned a single array with 1 spare in ACU. I have followed this KB and created 4x 1.9TB logical ...
1
vote
1answer
222 views

How does intel RAID Keys work on intel server motherboard and how do we set up hardware RAID?

We are looking to purchase an intel S2600GZ with two Xeons for a new server. We would like to run a setup of 12 disks, as the barebones we are looking at support up to 12. The idea is to run the ...
4
votes
3answers
162 views

How reliable are current 2 TByte consumer grade disk drives?

Most cheap SATA disk drives are rated with "1 non-recoverable read error per 10^14 bits read". What does this mean? 10^14 bits is just 12.5 TByte. If I have a full 2 TByte disk and I copy it to a ...
1
vote
2answers
120 views

Check badblocks on RAID-0

Without RAID-0, I usually check bad sectors using this command: fsck -yvckfC -E fragcheck /dev/sdX How to check bad sectors when the harddisk was using RAID-0? should I run it for each drive? ...
-2
votes
1answer
53 views

Amazon EBS Durability

According to this link: http://aws.amazon.com/ebs/details/#availabilityanddurability It said: Amazon EBS Snapshot can expect an annual failure rate (AFR) of between 0.1% – 0.5%, where failure ...
1
vote
1answer
166 views

MegaRaid SAS 8708EM2 Capacity Expansion

I have a ThinkServer RD230-4011 in hosting which initially had 4x 300Gb drives divided into 2 RAID 1 arrays using the built-in SAS 8708EM2 card, such as this: DISK 0 (300 Gb) | VD 0 (RAID 1, 300 Gb) ...
1
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1answer
129 views

Transfer raided drive between to identical HP Proliant DL360 G5

I have two identical HP Proliant DL360 G5 servers with HP Smart Array P400i controllers. I want to move the drives from one of the servers into the other server. Will the controller of the new ...
2
votes
2answers
7k views

How to monitor the hard disk status behind Dell PERC H710 Raid Controller with CentOS 6?

I have a Dell server running CentOS 6 using PERC H710 Raid Controller card with Raid 5 setup and I want to monitor the hard disk failure/working status behind the Raid Controller. Then I should be ...
0
votes
1answer
187 views

Is it possible to configure a supermicro X7DBU based system, with ESB2, to see HDDs greater than 750GB?

I'm currently running a Supermicro 1U server, with a X7DBU motherboard. When I boot up into RAID utility, I can either use ESB2, or Adaptec. Either way, The 3TB HDD (SATA) I put into it, is read as a ...
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votes
1answer
166 views

4TB drives using an ARC-1231 controller?

I would like to install 12 4TB hard drives in a RAID array using an old Areca ARC-1231 controller. Are 4TB disks supported by this controller? I could not find the specs for this controller at their ...
2
votes
0answers
53 views

How is that possible that file was changed without date modification? [closed]

I'm using Blade Server with CentOS 6.5 (ext4) installed, disks combined in raid6, connected in a storage area network. Somehow some of my files become corrupted from time to time without updating the ...
3
votes
1answer
233 views

How often should I scrub my RAID?

In general I would like to know how often a RAID array needs to be scrubbed. What contributes to the need to scrub more often (reading data?, writing data?, unexpected shutdowns?, drive age?, drive ...
0
votes
1answer
42 views

Will changing disks in raid1 damage existing data?

I created a testing Linux install on a hard drive. At the time I set my server without raid. I now have two brand new hard drives which I have put into my server and configured as raid 1. I then ...
1
vote
0answers
744 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 ...
1
vote
1answer
1k views

LSI MegaRAID SAS 9261-8i: Disk isn't recognized after replacement

I've got a Supermicro Server with an LSI MegaRAID SAS 9261-8i Raid Controller inside. There were 3 Disks attached to the controller which were configured as RAID5 array. One of the disks failed ...
0
votes
1answer
1k views

How to check HP Smart array status on ESXi 5

I've been reading How to run the HP Online ACU CLI for Linux in ESXi 4.x & trying to figure out a way to see the RAID status of the server without having to restart it. This is because, I've ...
1
vote
1answer
2k views

Replacing a failed and degraded virtual disk on Dell T110 II RAID 1 PERC S300

We have a Dell T110 II server, factory installed with Microsoft Windows Server 2012, Standard x64 Edition, running PERC S300 RAID Controller (1068E HBA). It came installed with RAID 1 on the 500GB ...
0
votes
2answers
630 views

Check RAID rebuild status of R710?

How can I check the rebuild status of a RAID volume without booting into the PERC utility in CentOS via the command-line?
0
votes
0answers
143 views

Intel RAID Web Console 2 Utility for Linux

I upgraded Intel RWC2 console (RAID_Web_Console_2-2.64-00.noarch -> RAID_Web_Console_2-13.08.04-01.noarch) however I've noticed that MR_MONITOR is no longer available in the latest version so I'm not ...
2
votes
1answer
261 views

Setting I/O scheduler for SSD based RAID array on EC2 instances

I created a RAID array using the 2 local SSD drives on a EC2 c3.4xlarge instance. # mdadm --create /dev/md127 --level=0 --raid-devices=2 /dev/xvdf /dev/xvdg # mkfs.ext4 /dev/md127 # mkdir /data # ...
6
votes
1answer
466 views

Is it possible to enable RAID 1 on an already in-use HP Proliant DL380 G5

I have a HP Proliant DL380 G5 with two HDDs in RAID 0 (Stripe)(72GB+72GB). It has been running Windows Server for quite a while now and has 30GB of occupied space on a stripted volume. I've now ...
0
votes
0answers
130 views

Software RAID: file system becomes read-only, mdadm fails with SEGFAULT

I have software RAID1 on Ubuntu 10.10 (Linux ubuntu 2.6.35-32-generic-pae). It is dedicated server I control via SSH. Yesterday datacenter people changed one HDD which was crushed. I did not run ...
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vote
0answers
71 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 ...
0
votes
0answers
538 views

How to install Windows 2012 on Dell server with S110 RAID?

I have a Dell server that has a S110 software RAID 1 mirror for the boot disks. When I run the Windows 2012 installer, no drives are found. I searched Dell for drivers but the only one I found for ...
2
votes
1answer
415 views

FREENAS: Why isn't mv command instant within a RAIDZ1 volume?

I'm currently 'reorganizing' file structure within a RAIDZ1 volume. Moving directories from one dataset to another, which are both contained on the same volume. SSH'ed into the machine and did a ...
0
votes
1answer
256 views

Change the Hard Drive in RAID using tw_cli while lustre file system is mounted

I've setup RAID-5 array disk, but recently one of the Hard drives is reallocating excessive sectors: (Reallocated Sectors = 323) # tw_cli /c0/p1 show all /c0/p1 Status = OK /c0/p1 Model = ...
1
vote
2answers
267 views

Ubuntu Server install claims 3 TB RAID1 volume is 801.5 GB

I have a brand new server containing two identical 3 TB SATA disks. These are in a hardware RAID1 configuration using the onboard Intel RAID controller. The BIOS sees the two disks as 3 TB and the ...
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votes
1answer
32 views

How to use remote laptop in RAID with ubuntu server? [closed]

I have a laptop A where I'm goint to install Ubuntu Server configuring it with 2 disks in RAID1. I have another laptop B in a different building ( with public and static IP ) with an external USB HDD. ...
1
vote
1answer
102 views

RAID controller write back performance

What kind of performance benefit write back on a RAID controller gives? To be more specific, the setup is 2 SSDs in RAID 1. The workload is mainly random write. Given the above, what kind of ...
0
votes
1answer
392 views

Upgrade to 3x Samsung SSD EVO in RAID-0 — what type of RAID controller to search for? [closed]

My current configuration is a RAID-0 with three conventional 2TB hard drives. I want to upgrade to three 1TB SSD EVO disks, also in a RAID-0 configuration. Using SiSoftware Sandra, I found out that ...
0
votes
1answer
110 views

mdadm RAID 1 config deleted

one of our huge production servers crashed this morning due to a HDD failure on port 0 (the bootable one). That server was running CentOS 6.5 in RAID 1 with mdadm. Although, a trainee changed the HDD ...
0
votes
1answer
43 views

Linux MD Raid same device detection

Linux md raid driver delays recovery/verification of multiple devices if they share the same parent device. We have setup where disks are pationed via device mapper, they use bcache, etc.. and ...
4
votes
1answer
501 views

CentOS 6.5 mdadm Raid 1 - Kernel Panic during raid data check

I have a brand new CentOS 6.5 install with two (mounted to /mnt/data) 1tb Western Digital Black drives in raid 1 with mdadm, configured via the installer. Unfortunately every now and again the entire ...
0
votes
1answer
172 views

Dell raid configuation issue omsa

I've been trying to create a raid using the dell srvadmin tools including raidcfg and omconfig. Controller info: [root@ksssd tmp]# /opt/dell/toolkit/bin/raidcfg controller controllerid=0 ...
1
vote
1answer
61 views

Raid 5 verifying

Good day every one, i all ready read this RAID 5 detects write errors? I have raid 5 on "3 ware" controller i want to ask: - do i need run from time to time verify schedule or i can use only ...
2
votes
1answer
675 views

HP ProLiant with SATA/SAS Drives

I Currently have a DL350 G5. I have 4 74GB SAS drives in RAID that work fine but I tried to add a 1TB WD RED SATA drive for some storage and the RAID controlling isn't giving me an option to create a ...
3
votes
1answer
313 views

Btrfs vs ext4 — Where's the safety break-even point?

Btrfs is still in heavy development and still considered "unstable" by Chris Mason, and many important features are still being added, but the dire warnings of data loss are calamity are long since ...
0
votes
0answers
135 views

installing ubuntu-based distro in a 2tb hard drive (hardware raid)

I'm setting up a server which has got the following configuration: 2tb hard drive (2 drives) raid-1 configured from bios (hardware raid) 40gb hard drive I would like to install the swap and the ...
2
votes
1answer
176 views

Redundancy level on a per file basis with BTRFS?

I would like to have one storage pool with multiple disks. Raid5 for metadata of course. But for user-data I would like to set the level of redundancy on a per file or per subvolume level. Can BTRFS ...
3
votes
1answer
186 views

how to merge 2 controller (6 Bays each) in HP DL370 G6

I am having a server DL370 G6 as seen in the image below, and I want to install Windows Server 2008 E. we are using it for camera recording. Each slot has 6 2 TB hard disks. I want to merge both as ...
3
votes
1answer
3k views

CentOS 6.5 with HP ProLiant DL360e Gen8

I have a chance to install a new HP ProLiant DL360e Gen8 server. There are three hard drives. How do I configure RAID 1 on this type of server. Will RAID already be configured so that it will look ...
0
votes
1answer
58 views

Is it possible to write into RAID chunk multiple times?

As far as I know, (most) file-systems do not support one to write into file-system cluster multiple times. In other words, cluster is the smallest unit in file-system and even if a single bit of ...
1
vote
1answer
592 views

Installing XenServer 6.2 on Proliant DL160G6 freezes during “Installing from base pack”

I'm trying a new install of XenServer 6.2 on an HP Proliant DL160G6 with a HP P410 raid card configured as RAID 5 over 4 drives, with a 256M BBWC. The install starts off properly, but when it gets to ...
15
votes
8answers
2k views

Do snapshots + RAID count as a good on-site backup solution?

The two main reasons I can think of for taking backups seems to be taken care of when I use both snapshots and RAID together with btrfs. (By RAID here, I mean RAID1 or 10) Accidental deletion of ...
0
votes
2answers
201 views

Is mdadm RAID Toast?

I took all my drives out and put them onto a new cpu/mobo. (upgrading) I boot up and mdadm claims it can't boot my degraded RAID. /dev/sdb sudo mdadm --examine /dev/sdb /dev/sdb: ...
0
votes
1answer
590 views

How to perform disk test attached to LSI RAID controller

I have four Seagate ST33000657 SAS drives attached to LSi 9260-4i controller. I want to test them for hw errors and bad sectors, before launching into production. I ve tried SeaTools, but it's not ...
0
votes
0answers
61 views

SATA III HDDs not working on SATA II RAID HBA

I would appreciate any help with this. We have Sunfire x4275 disk server with Sun StorageTek SAS RAID HBA and trying to get working these disks: WD RE 4TB Enterprise SATA III (WD4000FYYZ) Sun RAID ...
0
votes
1answer
89 views

JBOD or RAID on a streaming server setup

Currently my setup is 1 main server which holds all the mp4 videos and 3 other servers which holds portions of this video. The process is: when a user uploads a video, it is stored into the main ...
0
votes
0answers
60 views

mke2fs.ext3 stripe-width option missing

I'm trying to set up an ext3 filesystem on a RAID 6 array (with 6 disks) on XenServer 6.2 linux. All the help I can find tells me to use the -E stride=xx,stripe-width=xx options. However my version ...