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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103 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 = ...
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2answers
179 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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1answer
31 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. ...
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1answer
63 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 ...
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1answer
192 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 ...
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1answer
72 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 ...
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1answer
38 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 ...
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1answer
381 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 ...
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1answer
80 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 ...
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1answer
56 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
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1answer
290 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 ...
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1answer
230 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 ...
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65 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
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1answer
96 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 ...
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1answer
113 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
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1answer
1k 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 ...
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1answer
57 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 ...
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1answer
320 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 ...
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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 ...
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2answers
103 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: ...
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1answer
219 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 ...
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0answers
43 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 ...
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1answer
63 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 ...
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39 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 ...
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1answer
173 views

Correct VHDX sector size in Hyper-V enviroment for a RAID array

What is the correct sector size (which available in Powershell as options, when creating a new vhdx) for RAID10 array with default stripe size? I am using LSI 9271-4i controller and 4x Seagate ...
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2answers
129 views

Switch disks between array controllers

I have an HP ProLiant ML 350 G5, which has an HP Smart Array E200i/128 BBWC Controller embedded. This controller manages two arrays (each with three 72 GB disks in RAID 5) This controller has ...
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1answer
248 views

How to access SMART attributes when using RAID with a Dell Perc 4e (LSI)

I can't easily shut down this windows server, so I'd like 'online' solutions. I tried the following unsuccessfully: Seatools Enterprise: caused a BSOD smartmontools: scan only showed virtaul RAID ...
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2answers
149 views

Display HP RAID logical and physical drives sizes in megabytes

It does not seem possible to show more precises logical and physical drives sizes using hpacucli. For example, below I can only see sizes in TB and I cannot figure out how to display them in MB. ...
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3answers
143 views

Diagnosing disk health with smartctl

How do you determine if a disk has problems using smartctl? I have an Ubuntu 12.04 server using software RAID1, which became completely unresponsive. I rebooted, and it hung at boot with the message ...
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0answers
40 views

dmraid lists disk as “spare”, even though it was part of the array

It was setup as a RAID5, 4 disk array of /dev/sdc -> /dev/sdf. sdf failed, leaving the array in a degraded but operational state. A misguided attempt to restore the array led to one of the working ...
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2answers
61 views

RAID Level - minimum number of drives for RAID 10 [closed]

I tried a sizing tool for my database and i got the following recommendations: [2x RAID 1/0 drives for Installation (I)] [2x RAID 1/0 drives for Transaction Log (L)] [2x RAID 1/0 drives for TempDB ...
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2answers
77 views

Drive fault was asserted DELL [closed]

i have a DELL PowerEdge 2950 Server whit raid for 3 HDD. A friend whit a HP Proliant server which has broken, come to my help, to save information from the hard drive only had. When i put on my server ...
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0answers
129 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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2answers
41 views

Can I add a disk outside raid?

CentOS 6.5, Software RAID1 with 2 x 160GB As I'm running out of disk space, I want to add a third disk (1TB) that will be used for non-critical data. How can I add a extra sata disk to the OS ...
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0answers
64 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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1answer
44 views

Xen doesn't boot after install [closed]

I tried to setup Xen by the instruction released on the site of my hoster. I installed Xen, completed RAID setup as it is told in the instruction. Rebooted and succesfully connected to Xen from ...
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1answer
97 views

PowerEdge 2850 boot issue due to lost raid config

I have an older dell PowerEdge 2850 that has a boot issue when the server boots it comes up with the error pxe- e53 no boot filename received. I believe the raid card and memory where pulled and as ...
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1answer
137 views

Areca ARC 1261ML only sees 2TB on 4TB Disks

I recently acquired a Supermicro Box with a Areca ARC 1261 ML. I have installed 16 X Seagate ST4000VN000-1H4168 (4TB Drives). The ARC 1261ML controller only sees 2TB of usable space on the 4TB drive. ...
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0answers
58 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 ...
0
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1answer
79 views

Are there performance or reliability concerns when spanning an LVM partition across multiple 2TB RAID virtual disks?

I'm preparing a Dell R520 PowerEdge server with 8x 1TB disks as a data archive/warehouse (file, RDBMS, NoSQL) server. Out of the box, the PERC H710P RAID controller was configured with 3x 2TB RAID6 ...
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0answers
43 views

Raid partitions not listed in /dev

I've assembled software raid1 /dev/md1, and made two partitions /dev/md1p1 and /dev/md1p2. Now even after reboot I can't see these two in /dev. Why? (udev service is running) #fdisk /dev/md1 ...
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1answer
51 views

Issue rebuilding raid5 with 3ware controller

I have a degraded array with 8 disks. Unit UnitType Status %RCmpl %V/I/M Stripe Size(GB) Cache AVrfy ------------------------------------------------------------------------------ u0 ...
3
votes
1answer
469 views

What does “single-bit ECC errors were detected on the RAID controller” mean?

I have a Dell T7600 with a Perc H710P RAID controller and 4 attached 3TB drives. Over the past few months the RAID controller has been intermittently reporting errors on boot: "no boot device found", ...
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3answers
78 views

Partitioning & RAID recommendation for a server with 3 disks

I'm installing a server machine (intended to run Debian GNU/Linux) which, among other things, is to be used for backups of our code. Now, I don't need all of the contents of the HDD to be ...
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0answers
34 views

Which RAID C600 Upgrade Keys for S2600CP4 Intel server board to enable SAS features

I need RAID C600 Upgrade Keys for S2600CP4 Intel Server Board to enable SAS features. I am not sure which one shall I use: RKSAS8 or RKSATA4R5?
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1answer
128 views

How to replace NVRAM battery in BlueArc storage?

The RAID/NVRAM battery on a BlueArc Mercury storage host is located in the front of the storage head, and can be replaced without down time. From what I can gather, after battery change, I have to ...
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1answer
56 views

Error at partitioning disk

I am struggling to install debian squeeze (64 bit) OS in the system which is having RAID 1. While partitioning the drive, It says an error Operation not permitted during write on /dev/md126 . I am ...
3
votes
1answer
106 views

Multiple Servers, Multiple Drive Failure within 12 hours?

In the IT world I just won the Lottery Twice.... Today we had a hard drive fail in a raid array. A few hours later we had another drive fail on a different server.... We started checking all the ...
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45 views

ML310 Gen8 SATA Controller losing settings

We have purchased a couple of ML310 Gen8 with Sata Drives. They have both lost their raid controller setting. We just have to go back in and set the drive back to the array and all is fine. Anyone ...
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1answer
88 views

Hard disk is detecting as read only

I am installing Debian Squeeze 2.6.32 64 bit OS in IBM System x3250 M4. This system is already having built in RAID. After enable the RAID, I have started to install the Debian Squeeze 2.6.32 64 bit ...