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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Why does SSHFS I/O latency test much faster than local RAID & NFS?

SSHFS tests for server I/O latency using dd returns very surprising results, so much so that I'm worried this might be some problem either with the test method or configuration. Test 1 on local RAID ...
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2answers
1k views

How do you repair a Ubuntu 14.04 RAID-LVM-DM-CRYPT-LUKS Physical to Virtual system that won't boot?

I can't get a Ubuntu 14.04 Virtual server to boot correctly. It's recently been cloned "dd if=/dev/sda of=vmimage" The Physical has a RAID1-LVM-DMCRYPT-LUKS configuration, The boot sequence aborts and ...
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14 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 ...
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HP ProLiant ML350 G6: Does the RAID rebuild automatically?

A SAS HDD in our ML350 is faulty. We're buying a new one and I wanted to ask if I can just take out the faulty one and insert the new one with the server on to let it rebuild the raid or any manual ...
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8 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 ...
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1answer
25 views

Installing CentOS on HP Server, SSDs connected to a RAID controller

I am trying to install centOS 6.0 in this HP Server, I contacted with the support and they said me that it supports that OS. I have no problem installing it on a SSD that is connected directly to ...
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1answer
66 views

SSD DD write speed lower than HDD [on hold]

I've come across a strange phenomena with a new dedicated server that's been provisioned. The server has 2x1TB HDDs in software RAID 1 and a separate 120GB SSD that is intended to be used as a ...
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51 views

Install CentOS 6 on HP ML 150 gen9 server with b140i raid controller

I have HP ML 150 with Smart Array b140i controller. I want to install CentOS 6.6, but the driver isn't built-in the ISO. I have download the Driver and install in the USB(dd). I need the command for ...
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3answers
5k views

Dell Open Manage physical disk failure predicted

I've installed the Open Manage Server Administrator on my Dell T100 to monitor RAID Controller and disks. From the Physical Controller report web page I see a table listing the two disks I have but ...
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8 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 ...
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24 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 ...
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26 views

Does this RAIDz setup suit my situation? [closed]

I am looking into buying a few drives to set up a FreeNas box for home storage. I will be storing movies, pictures, music and very private information (that I really, really dont want to lose) on the ...
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1answer
20 views

Firmware RAID5 and SED on Linux

I have three HDD's (Seagate ST4000NM0053) in a RAID5 set-up using firmware RAID (RSTe 4.0, Intel® C612 chipset) on Debian 8.4. They are SED, so I would like to set the ATA password. Unfortunately, my ...
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1answer
2k views

Cannot install grub, segmentation fault, unable to identify filesystem, superfluous RAID member, found two disks with same index — Debian 7

A server was recently transported from location A to B, a long journey that took six months. Things have gone wrong due to nothing being labeled prior to shipment. Yes, I know --- it was done by ...
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1answer
24 views

Converting to Hardware Raid from default Software Raid, backplane 1 connector A0 is not connected Issue.

I have a newer Dell R330 server that came with three 128GB SSD's as well as a software raid S130. After setting up a Raid 1 with single hot spare, I realized that ESXI is not fully compatible with ...
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1answer
23 views

Convert single disk raid0 to raid1 on an LSI megaraid controller

I have a server with an LSI Megaraid raid controller which has a single disk for the OS configured in raid0 What i want to do, is add a second brand new disk for redundancy and convert the raid0 to ...
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16 views

Logical Drive 1 Fatal Error System Logs

When a Client Backup starts on my 2012 Server Essentials, it fails and I receive the following error in my System log: Logical drive 1 of array controller B120i [Embedded] returned a fatal error ...
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2answers
5k views

Install CentOS 7 on HP dl120 gen9 server with b140i raid controller

I'm trying to install CentOS 7 on a HP DL120 gen 9 server with a b140i controller. I have 4 1TB HDD setup in a raid 1+0 and the CentOS installer doesn't seem to recognize the logical drive created ...
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1answer
39 views

Why shouldn't I use striping raid on the partition I boot from?

The Gentoo Handbook says: You should not use any form of striping such as RAID-0 or RAID-5 on the partition you boot from. Why is this? I've never seen a similar warning before. Grub supports ...
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2answers
50 views

128k stripe > 64kb AUS > 4kb AUS

I have a RAID5 of 3 x 2TB set to 128k stripe. The volume is formatted in Windows with 64kb Allocation Unit Size (AUS), and within that volume I have multiple virtual hard disks where guest operating ...
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3answers
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What is the memory module on a RAID card needed for?

As above, what is the reason for needing a memory module on a RAID card? The card I am looking at (HP P410) comes with either 256MB or 512MB but unsure which to get and why.
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3answers
1k views

Getting debug output from a debian initramfs

I'm attempting to configure a server for a debian lenny on software raid0 and a LVM root filesystem via the serial console and the hosting company's recovery console (basically an ubuntu liveCD). ...
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17 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 ...
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1answer
34 views

Replace failed RAID 1 Drive on Intel Platform

Good afternoon, I have a Intel Server running Windows 2008 R2 Standard. It has a RMS25PB080 Raid controller card in with. It has two logical drives, a RAID 1 and a RAID 5. The one harddrive on the ...
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HP P410 “Parity Initialization Status: Initialization Failed” How to fix?

I'm using HP P410 raid card with BBU with 12 x 3TB drives on RAID50 After a power outage at the datacenter, the hpacucli shows this: Parity Initialization Status: Initialization Failed However, all ...
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28 views

Raid device on rename appended with _0

I am creating various raid configurations. When I create a raid device say 5 with 3 disks mdadm --create /dev/md/md5 --level=5 --raid-devices=3 /dev/sda /dev/sdb /dev/sdc It does create a device ...
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1answer
22 views

Dell PowerEdge Maximum Disk Size

I have a Dell PowerEdge 2900 server which I am trying to setup as a NAS. I have not done any firmware upgrades to the RAID controller or anything like that. What I need to know is what the maximum ...
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18 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 ...
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87 views

How to correctly create a filesystem on disks that are connected to a RAID disk?

I want to create a ext4 filesystem on sda, sdb, and sdc and mount them to use them but I don't know how to handle all the raid stuff. lsblk output: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda ...
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Is there such thing as hardware encrypted raid disk?

I have a server for which I want to protect the content. The server is located on a clients premises. Is there a way to encrypt the content of a RAID DISK (at hardware level) ? What I need is that ...
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121 views

Ubuntu 14.04 Software RAID 1 - md0 inactive

I have my root filesystem on /dev/sdc, and a software RAID 1 spanning /dev/sda and /dev/sdb (I think). I physically moved my computer and ran software updates today (either of these could be the ...
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14 views

MegaRAID Rebuild required after PdOffline + PdOnline?

In a RAID6 array with 12 disks I have taken a disk offline to flash new firmware, then brought it online again: MegaCli64 -PdOffline -PhysDrv[8:0] -a0 MegaCli64 -PdFwDownload -PhysDrv[8:0] -f ...
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64 views

Smart array P410i Maximum hard drive capacity?

I've looked for quite a while and for some reason can not find this info anywhere, the HP quickspec document search (Which they recommend) doesn't bring up anything. I have a proliant DL380 g6, and ...
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1answer
12 views

How to keep md-raid from blocking IO?

I run a server with md-raid (software) level 1 (2 HDDs mirroring) and several different applications run on it. The problem arises when file-intensive jobs (e.g. extracting large archives) run while ...
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2k views

mdadm: hot remove failed for…

My RAID1 is degraded and I need to replace /dev/sdb. However, I could mark /dev/sdb5 (in /dev/md1) as failed and removed it, but I can't do the same with /dev/sdb1 (/dev/md0 which is mounted on /): ...
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1k views

IBM System x3650 M3 - how to expand RAID 10 array

I have RAID 10 array on my IBM System x3650 M3 server - four drives IBM 146GB 10K 6Gbps SAS 2.5". I bought four new drives (also 146GB 10K 6Gbps) because soon I may have problem with free space. Can ...
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21 views

RAID5 now showing as two virtual disks instead of one

We have an old PE2950 that was just about to be decommissioned and were told that nothing of importance was on it. After a power failure the other day it came up saying that the RAID array was a ...
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1answer
1k views

Repair or recreate virtual drive on raid array

I have raid array intel srcsas18e. Today I saw that OS was shutdown and status two hdds is "foreign unconf bad". Both hdds were in one virtual drive. But I do not find this virtual drive in a config. ...
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1answer
2k views

Recover mdadm RAID 10 array: listing all as spares

I'm a bad person and haven't backed up my RAID elsewhere. I now have a RAID10 array that won't assemble, and I'm hopeful I can save it. Here's the details: I have five hard drives set up as RAID10 ...
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23 views

hp proliant DL 180 G6 P410 cant enter raid bios

Given this HP Server with P410i raid controller. It doesn't see any attached disks most likely because they are not defined in the RAID bios and I don't see a way to enter there. I have tried ...
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30 views

Advice needed about RAID and partitioning new server

first of all i want to appolagize if i doublepost. Plese merge this with similar post. Thank you. Now about the situation and the system we are trying to build and want an advice from experienced ...
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40 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 ...
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46 views

Will a H310 Mini or a H200 support Samsung SSDs (840/850 Pros)?

I've been searching around and struggling to find out of a H310 Mini or a H200 will run Samsung 840/850 Pros. I know Dell have their officially branded SSDs, but unfortunately cost is a major issue ...
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Is a PERC310 Mini compatible with an R610?

I'm going to purchase an R610 soon which is sans RAID card. The spec sheet lists 2x PCIe x8 + 1 "storage x4" slot. However none of the X10 series cards are listed on the spec sheet. I presume that's ...
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1answer
1k views

Kernel panic after boot Centos 6.5 HP DL320 B120i HPVSA

Im working with a new HPDL320 micro server (gen8-2) with a HP Dynamic array B120i My problem is after the setup. I provided the DiskDrive to the installer and everything is fine. at first i used kick ...
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2answers
4k views

SBS 2003 boot stalls at acpitabl.dat

I have a SBS 2003 server running for 3 year without any problems, and few days ago it freezes during the boot. System is using two 500 Gb drives in RAID1 (Intel Matrix 7.5) After trying to load in ...
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3answers
845 views

Is using nested RAID 6+1+0 a good idea?

Currently I have 24 disks of 500 GB, and I would like to create a bigger nested RAUD using a Dell Power Edge R730 server, having 4 times RAID 6 with six times 500GB each, over them I want to add RAID ...
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2answers
47 views

Can I setup Raid 1 after the system is already running

I just finished installing owncloud server using centos 7. My data is located at /var/xxx and I dedicated the hard drive/dev/sdb just for this /var directory. After a while, I decided that I wanted to ...
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2k views

Monitoring PERC 6/i in vMware ESXi 5.5

I currently have a Dell Poweredge 2950 running ESXi 5.5. My datastore is four drives in RAID 5 configured in the PERC 6/i config utility on bootup. My question is, what do I do if/when one of these ...
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36 views

Which raid array will be best practices with seven 1.2 tb hdd system

I have a server which have seven 1.2 tb hard disks. I have to create raid array but i don't decide which raid i use? First of all, first and most important matter is security. At any cost i must not ...