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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2answers
59 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 ...
-5
votes
0answers
40 views

Why is my '/' root disk usage is 100% [duplicate]

Below is my disk usage for some mounted filesystems Filesystem Size Used Avail Use% Mounted on /dev/cciss/c0d0p6 20G 19G 0 100% / /dev/cciss/c0d0p7 9.7G 151M 9.1G ...
0
votes
2answers
25 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
0answers
40 views

PowerEdge 2900 RAID arrays with 4TB drives [on hold]

I have a client with a Poweredge 2900. Since it has 8 x 3.5" SAS/SATA bays, we would like to repurpose the system for use as a storage server. The client needs RAID, but it appears that the PERC 6/i ...
-2
votes
1answer
23 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
24 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
vote
1answer
21 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 ...
1
vote
1answer
46 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
0answers
19 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 ...
-3
votes
1answer
61 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
38 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 ...
1
vote
0answers
20 views

Ubuntu 12.04 MD array not assembling after motherboard change [closed]

I recently upgraded my server by installing a new Xeon e3-1270v3 and Supermicro X10SAT board. Installation was simple and I reconnected my controller card, a LSI 9211-8i. When I booted the array would ...
3
votes
1answer
53 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
26 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
38 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
84 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
65 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
49 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
50 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
6 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 ...
-1
votes
0answers
17 views

RAID 1 without cache protection - ZCMP/backup battery

I'm running RAID 1 on an Adaptec 6405. I'm trying to decide if I need to install the ZCMP on the card to provide Cache protection. Adaptec's ZCMP is the equivalent of a BBU - battery backup for the ...
2
votes
1answer
44 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
121 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
44 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 ...
1
vote
0answers
24 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
32 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
55 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 ...
-1
votes
0answers
15 views

RAID moved to new server, Clients sporadically get error message

I have a really strange problem and I can't figure out what it is. Our company server runs on OS X 10.8 and has a RAID connected to it. The RAID was moved from an old server, all permissions were ...
0
votes
1answer
32 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
votes
0answers
20 views

How to tell if my server got hardware RAID, and whether it's worth using? [duplicate]

My hosting company gave me a Dell PowerEdge R210 II server with two hard drives. I want to use the drives in LVM mode over RAID 1, on CentOS. By default, the preinstalled OS comes with neither LVM nor ...
0
votes
2answers
120 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 ...
-3
votes
1answer
23 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
36 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
47 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
24 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
27 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
176 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
29 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
49 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
104 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 ...
1
vote
1answer
123 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
34 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
58 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
70 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 ...
2
votes
1answer
229 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
55 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
120 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 ...
13
votes
8answers
1k 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
60 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
49 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 ...