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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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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227 views

CentOS 6: SATA link down when scanning for unused drives

I recently inherited a CentOS 6 server with 8 installed hard drives. 6 of these drives were going to be configured as an LVM, but never got that far. The drives are installed and, from what I can tell,...
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1answer
31 views

RAID 10 (2+2) and (4+4) - terminology or physical setup?

I understand what RAID10 (2+2) is (stripped mirror) whereby there are data are striped across 2 groups and each group have a pair of mirror devices (2 disks). This is how i have understand "2+2" For ...
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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 ...
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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 ...
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2answers
66 views

mdadm not assemble after restart

I have 2 disk with the next structure: lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 3,7T 0 disk ├─sda1 8:1 0 2,7T 0 part └─sda2 8:2 0 931,5G ...
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3answers
122 views

How do you securely shred a file from a RAID 6?

I'm looking for a way to delete a file from a RAID 6 implementation in a secure fashion (shredding). Do I need to delete the file from the RAID, disassemble the RAID, wipe the free space of each drive,...
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1answer
27 views

why all hard drives in a HPC cluster must be of the same size and part number? [closed]

One of the hard drives of my HPCC is broken and I have to buy another one. I've heard it must be of the exactly same size and part number. Could anyone explain me why? Thanks
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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 ...
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1answer
53 views

Raid 5+1 considerations

I am charged with upgrading a persons private business network and was thinking of putting a bit of backup and centralisation. So for that i though of getting a small NAS with 4 drives and having 3 ...
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1answer
20 views

Can a RAID 10 array be transferred from a Windows box to a Synology (or other) enclosure? [duplicate]

Currently I'm debating about whether I want to use a spare workstation running Windows 10 and turn that into the enclosure for a 4x6TB RAID 10 array since it has decent hardware specs or wait until ...
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1answer
48 views

RAID mirror, combine 2,5 and 3,5 inch HDD, different capacity

I have two HDD, both are WD Black series, one is 2,5" and the other one is 3,5". Both have 64 MB of cache and 7200 rpm. The former one is 750 GB, the latter is 1 TB. I would like to create RAID ...
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0answers
464 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 ...
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3answers
63 views

Datacenter steal data from raid 1 server

I have a server (HP DL380pG8) in one of data centers in my country. As I was thinking about securing my data, I was thinking about what if, someone in data center, extracts one of disks which are ...
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1answer
40 views

Upgrade RAID 10 with 7200RPM SATA

We have a Dell T320 with a S110 software RAID with 7200RPM SATA drives. The RAID level is 10 with four drives. I underestimated the demand on the disk, and it is now a major bottleneck of the system. ...
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2answers
64 views

How does does a Dell MD12XX DAS appliance show up on a server

I have a Dell PowerEdge Server with a HW RAID controller and a 12Gbs HBA SAS Storage adapter. I'm are looking to add more storage for backup/archiving purposes. I'm looking at using the MD1200 or ...
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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 ...
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2answers
40 views

HP Proliant RAID setup; does the order matter?

This should be a simple answer but I need to know before proceeding with my configuration. I have an HP Proliant DL380 G6 6-port server. I need to create a Raid array using 4 drives but port 1 and 3 ...
2
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1answer
202 views

Mix HDD and SSD in same RAID 1 array

I have a Dell Poweredge R410 with Perc H200 controller. I would like to upgrade my 15k RPM arrays with SSD. Both disks are SAS 6Gbps. Will it work if I remove 1 of the 2 disks, replace by the SSD, ...
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0answers
108 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 ...
2
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1answer
33 views

Should I expect both disks in my RAID1 array to fail at about the same time?

I have an Ubuntu server with two HDD drives in a software RAID1 array. These are identical drives, and I'm assuming they're seeing the same level of read/write activity over their lifetimes (correct ...
2
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1answer
61 views

One disk accessed more than others during md RAID6 rebuild

I am rebuilding one drive of an 8-drive RAID6 (using 'md' Linux software RAID), and have noticed that it doesn't seem to be going as fast as it could, presumably because one of the drives is being ...
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2answers
39 views

One disk member of two Disk arrays

I will start with my question and then make a short example: Is it a good idea to split a disk into multiple partitions and create different disk Arrays (raid1/raid5) with those paritions? Are there ...
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1answer
57 views

How can I check if my server have RAID-1?

With lsblk command I get: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 232.9G 0 disk ├─sda1 8:1 0 32G 0 part │ └─md0 9:0 0 32G 0 raid1 [SWAP] ├─sda2 8:2 ...
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1answer
149 views

How do I reconfigure my disk array on a Dell machine under Linux?

I have a Dell R620 with a PERC RAID controller (lspci shows "RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator] (rev 05)"). I had placed a single disk in it, made it a "...
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1answer
219 views

HP Array P410, HDD changed, but still predict to fail soon

On HP Proliant DL G6, one disk in RAID 1 on P410 array broken. It was HP EG0300FBDBR. I changed it on compatible HP model - HP EG0300FAWHV. (both 300 Gb, 10K) But HP Array Configuration Utility still ...
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0answers
54 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 ...
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2answers
78 views

Is it possible to ask ReFS to use hardware RAID6 for parity calculations?

Does ReFS use FPGA-based XOR engines for RAID parity calculations? If not, is it possible to get it to use such tech?
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3answers
112 views

LVM and RAID setup

I am relatively new to LVM and RAID. I have a Server (HP ProLiant) with a Hardware Raid (RocketRaid 2710). Given two HHDs (500 GB) I wanted to setup RAID 1 (Mirroring). When installing Ubuntu I made ...
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0answers
90 views

Can't stop and reformat /dev/md0

I want to reformat /dev/md0, which is a RAID0 array consisting of 4 disks (sd[bcde]). However, when I tried to run the command mke2fs, I received the following error message: /dev/md0 is apparently ...
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0answers
160 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 ...
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1answer
142 views

What speed should I expect from an MSA60 attached to an HP p212

I have an HP DL380 G5 with a P212 controller and a 256MB cache card/battery. The P212 is hooked up to an MSA60 enclosure, which for testing, I have populated with 8x 500GB 7.2k SATA disks. I know ...
7
votes
3answers
877 views

RAID with three disks (RAID 5 vs RAID 1E)

I am upgrading a server which has four drive bays. I'll be putting a new Adaptec RAID card into the server so it will support large drive sizes. I need to squeeze as much capacity as possible out of ...
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2answers
37 views

Where is the right place to install the ESX vSphere?

I have one server with 6 hotplug 300G SAS HDD. Where is the right place to install the ESX vSphere? 6 HDD RAID10 for datastore and ESX vSphere together -------- OR -------- 2 HDD RAID1 for ESX ...
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0answers
105 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 ...
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53 views

HighPoint RocketRAID 2740 passthrough

I'm currently extending my server and about to buy a HBA. I stumbled across the HighPoint RocketRAID 2740 which is quite cheap at the moment. I am going to extend an existing MDRaid + LVM ...
0
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1answer
31 views

Raid Controller: Activating Write Back [closed]

We need to activate "write back"-mode on a raid controller in a storage server. Do i need to reinstall the operating system or rebuild the raid setup after activating write back? We can´t test it, ...
1
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1answer
64 views

How to find out raid in linux: cat /sys/block/sda/device/raid_level vs dmraid -s in Redhat?

I am trying to find what raid level and what storage controllers are there in my remote HP server. I can find out the following details which storage controller, size of the disk, model etc. But ...
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1answer
238 views

HP P410 Windows Server 2008 R2 will not boot

I have a HP ProLiant DL160 G6 with a P410 1GB FBWC controller. I have 4 x 4TB SATA drives. When an array has been created, I can start the Windows Server 2008 R2 installation, and it goes fine until ...
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1answer
38 views

#raidctl - Operation not support with volume of this level [duplicate]

I am having problem to create a RAID volume on the internal disks of a Sun Server (Sunf Fire V440) When I type the below command raidctl -f -c -r 5 c1t0d0 c1t1d0 c1t2d0 c1t3d0 it displaysOperation ...
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1answer
60 views

Setup SunFire 440 Raid Configuration

How can I setup Internal Hard disk RAID5 configuration? I have SunFire 440 machine with 4 internal hard disk. I have never worked on Sun systems except for now and I am exploring google for the above ...
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13 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 ...
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0answers
178 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 ...
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3answers
2k views

Can “enterprise” drives be safely replaced by near/midline in some situations?

When specifying servers, like (I would assume) many engineers who aren't experts in storage, I'll generally play it safe (and perhaps be a slave to marketing) by standardising on a minimum of 10k SAS ...
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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 ...
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1answer
67 views

Cannot mount partitions from LSI Software MegaRAID

I have a ThinkServer RD440 running RHEL 7.2 with a LSI MegaRAID which is configured as a RAID 10 over 4 disks. It is configured on a partition level, not the raw disks. The root partition is not part ...
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0answers
549 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 ...
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1answer
22 views

recover original file system from raid6 iso's

I started with 5 drives. 1 has failed (i.e. fails to communicate anything) and 2 more are returning read errors. My plan is to use ddrescue to store the 4 working drives to iso files. After this I ...
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1answer
29 views

Integrated raid exception detected. Volume (00: 009) is currently in state degraged

I have IBM x3200 M2 Server. Currently there are 2*500 GB hard drive installed in it. Raid 1 is configured in this server. I have hosted an windows application in this server. Currently this server is ...
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1answer
106 views

Adding disks to add more space to RAID 1+0 array

I have a HP ProLiant DL380p Gen8 server running Ubuntu 14.04.1 LTS. During the installation I had setup RAID 1+0(which I believe is same as RAID 10?): hpssacli ctrl all show config Smart Array P420i ...