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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Boot from RAID with PERC H310 on Dell PowerEdge R520

I'm trying to install an OS on an R520 with the PERC H310 RAID controller and set up two physical drives as a virtual drive with RAID-1. However I can't select that virtual drive in the boot sequence ...
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2answers
31 views

Is it a good idea to use two different SSDs in RAID1? (to avoid both drives failing at the same time because of some manufacturing bug)

I'm building a new server here at university and I suggested that we use two different SSDs in RAID 1 (mirror) to avoid both drives failing at the same time because of some inherent manufacturing ...
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45 views

Does the SAS Expander / Backplane matter?

If I am buying some used servers with 24-25x SAS that I hope to someday upgrade from 6Gb/s to 12Gb/s RAID, do I need to be concerned at all with the backplane that the drives are plugging into not ...
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8 views

How to Mounting RAID0 EBS Volumes after reboot on EC2?

I've already attached two volumes to my EC2 instance and configured RAID0 for them. After a reboot, the volumes didn't re-attach. I thought I had configured them to attach on reboot in fstab but they ...
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1answer
27 views

Linux: Rebuilding software Raid 1 fails when adding partition

I had an issue yesterday with a software Raid, where one disk had to be replaced. I removed the partitions from the array using mdadm /dev/mdx -r /dev/sdbx After the failed drive has been replaced ...
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21 views

RAID 5 Online Capacity Expansion sector size changed

I just started RAID 5 Online Capacity Expansion, and noticed sector size went form 4K to 512B. Could this be a problem?`I did not a have a sector size option when adding the disk.. Running on ...
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1answer
33 views

Optimal configuration with Synology as HA iSCSI backend for vSphere

I'm looking into purchasing a new storage backend for our VMware vSphere Essentials package. We have 3 ESXi hosts, currently mainly using DAS. The goal is to upgrade to Essentials Plus this year, to ...
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1answer
17 views

Raid-5 Linux Software array, 3 drives “removed”

I have a raid array with several drives marked as removed. I want to add them back in, but am not sure how to do so. [root@tera2 ~]# mdadm --detail /dev/md3 /dev/md3: Version : 1.2 ...
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1answer
55 views

CentOS 6.6 on HP Proliant 360 [duplicate]

I have 3 of the aforementioned servers, and when I netinstall centos on them, the installer recognizes the raid configuration and the logical disks and installs fine. Upon reboot after installation, ...
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17 views

RAID 0 handling with external controller [closed]

Does DELL SAS 6/IR work with 3TB drives? If not which external controller which support 3TB drives do you recommend? I've got Dell Precision T7400 WorkStation and two 3TB SATA Segate drives WD30EZRX ...
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24 views

Possible drive failure? BSOD on Windows Loading screen -> Server 2008 R2

I've got a rig running Windows Server 2008 R2 with 2 1TB drives in it. I believe they were in a RAID 1 Software array. Recently I went to restart the computer, and on startup it BSOD when the ...
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3 views

Converting Boot drive from RAID0 to RAID1 [migrated]

I bought a HTPC I plan on using as a NAS/HTPC combo, which has been working well for me for a while now. When I bought the machine from Dell, it came with 2 500GB HDDs in a RAID0 configuration as ...
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21 views

IBM x3950M2 server, no drives detected during windows install

I have an IBM x3950M2 (72236MU) server that was running Server 2012. I decided to swap some drives around and reinstall from scratch with Server 2012r2. However I am unable to get the windows ...
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2answers
35 views

ESXi sees RAID1 as two hard drives

The server is Proliant ML330 G6. I've activated the embeded SATA RAID in BIOS. Created 1 logical drive in "Option Rom Configuration for Arrays" in RAID 0+1 that consists of two 1TB drives. So in other ...
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1answer
34 views

Which RAID to use for 8 hard drives? [closed]

I have 8 idendical hard drives and I want to know which RAID levels or level combinations I should use to achieve maximum performancefor random reverse reading.
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2answers
23 views

SW ZFS vs. HW RAID controller

I run a FreeBSD 10.1-RELEASE webserver, and I have 2 sata HDD on a HW RAID1 controller, but when I installed the OS, it won't do it on a ZFS filesystem (for mirroring as I intended to) but I was ...
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1answer
45 views

Does hardware RAID1 offer significant advantages to S/W RAID in a computer cluster that's highly redundant?

I'm about to set up a Linux cluster of 5 physical server nodes (more nodes to be added later, probably). the cluster will be managed by Proxmox (and yes, it works in software RAID) shared storage ...
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32 views

Replacing a failed harddrive in a RAID set with arcconf (Adaptec RAID Controller)

I just wanted to confirm some things before committing to production equipment, so I thought I'd run it by serverfault. I had a dead drive. It was not showing up in arcconf getconfig 1 PD and was ...
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1answer
28 views

LVM2: pvscan with offset?

After I played with mdadm a bit too hard, I'm now tryng to recover my lvm2 volumes that were sitting in the original RAID1 array. pvscan finds nothing, but that's not a surprise: since mdadm is not ...
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1answer
24 views

Rebuild the Software RAID Array after a Drive Replacement

I had a disk failure on my dedicated server with 1and1. They have sent me this guide. ...
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2answers
55 views

How does LSI MegaRAID actually lay out RAID10 sets?

I'm trying to set up a RAID10 set on an LSI MegaRAID controller. It is unclear to me how the RAID controller will actually lay out the RAID set on the physical drives. Part of the problem is that ...
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1answer
48 views

RAID 1 failed disk replacement - backup recommendations [closed]

Having recently lost one drive in a RAID1 (mirrored) setup with a "hot spare" on a HP ProLiant ML350 G6 server, we're about to have it replaced with a new one. The disks are hot swappable so for that ...
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2answers
90 views

Problems with DL380 Gen9 Smart Array

I recently bought a ProLiant DL380 Gen9, i've had some trouble getting it up and running...I ran the ProLiant SPP ISO to uprade firmwares but felt the system became less stable as a result, at one ...
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4answers
215 views

Ubuntu installation can't detect hard drives

I'm installing Ubuntu onto a HP Proliant DL360 G7 server, which has a hardware Smart Array RAID controller that is not compatible with Ubuntu. HP say the RAID controller needs to be disabled in the ...
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1answer
22 views

Centralized LSI RAID controller management

In an organization where the hardware maintenance team is separated from the OS platform and operations team, 3Ware's RAID controllers have been in use together with the 3DM2 web service opened up to ...
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1answer
32 views

“No inittab file found” after reset

An old dedicated server (Debian w. Raid1) wasn't responding today and now can't boot after manual reset. Last message is "No inittab file found". I still have access to filesystem via rescue system. ...
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2answers
112 views

4TB HGST Ultrastar 7K4000 shows as 2 TB with Dell PERC 6/i RAID controller

I just got 2 x HGST Ultrastar 7K4000 4 TB drives, for creating a RAID 1 array in a Dell Poweredge 2950 server with a PERC 6/i RAID controller. According to a Compatibility Summary from HGST, the ...
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0answers
83 views

ZFS - zpool replace never finishes

I have a 5 x 3TB raidz1 array on a ubuntu 14.04.1 server. Last month, one of the drives died (audible clicking). I was able to replace the drive with zpool replace RAID <dead drive> <new ...
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42 views

mdadm raid 5 failed drive recovery

My ubuntu mdadm setup is as follows /dev/sdb/ /dev/sdc/ /dev/sdd/ /dev/sdf/ I have the following 4 1.5TB drives in a mdadm raid 5 array. One of the disks (sdb) died on me leading the array to start ...
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1answer
30 views

How to identify failed drive/port on 3ware card

I have a 3ware 9650-SE controller with 2 drives in RAID-1 configuration. The drive on "port 1" has an error but the drive cages aren't labeled. I tried using the cli to "identify" the drive but tw_cli ...
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2answers
67 views

3disk in raid 1 using half/half

Im using a mdadm software raid system on my new server which runs 3x120GB ssd drives. Currently, this is the preinstalled configuration that came with the server cat /proc/mdstat Personalities : ...
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8 views

Take RAID 1 too much CPU performance (Intel Pentium G3220)? [migrated]

I'm currently building an home server. I'm using an Intel Pentium G3220 CPU. I want to configure RAID 1 for the two 3TB Western Digital WD30EFRX Red HDD in the server. My question is if software RAID ...
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2answers
50 views

Server raid doesn't boot in the morning

We have a HP Proliant ML350 G6 with integrated sas raid controller. Since 3 days the server starts up in the morning without this raid. All othe HDDs / SDDs are ok. We did install the ServicePack ...
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7 views

HP Microserver Gen8 (Intel Celeron G1610T) with Ubuntu Server 14.04? [migrated]

I'm looking for a small home server working with Ubuntu Server 14.04. I want to install SAMBA and a UPNP streaming server on it. I found this small HP Proliant Microserver with an Intel Celeron G1610T ...
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1answer
60 views

Can I recover my raid after blown backplane / mobo?

We had a catastrophic server failure the other day. The server was the head to our NAS. Multiple disk shelves were attached via SAS (SFF-8088 to a HP Smart Array RAID Card). Also connected to the RAID ...
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1answer
34 views

connecting HP gen 5 SAS raid cage to a third party (3ware, LSI) controller?

I have a ML350 G5 that I'm thinking of repurposing to save money. I'm looking to install FreeNAS but it (ZFS) doesn't play nice with the HP e200i card that's part of the motherboard from what I've ...
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1answer
27 views

How do I connect 16 SATA-drives to one Adaptec ASR-6805 KIT? (2 SFF-8087 Internal Ports) [duplicate]

Kit includes only 2 cords SFF-8087 to 4xSATA... Sum is 8. I need 16. What should I do? No way to change the controller. But can buy additional cards or wires if needed. Please advise.
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1answer
44 views

Cannot see all disks on Solaris 10 using on a Dell Perc5i Dual Channel Raid Controller

I have a Dell PowerEdge 2950 running Solaris 10 with 8 drives. I want to swap some of the drives out for new ones. My issue as of right now is that I only see half of them and there does not appear ...
2
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1answer
88 views

Data Transfer Speed Hardware Config

First off, I am sorry if this gets a little scattered, it encompasses a large problem for me I have been dealing with for some time. Here is a little background: I operate an educational website ...
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2answers
24 views

Move PERC5I and RAID Array from Gen 2 to Gen 3 2950

I have two 2950 servers, one Gen 2 and one Gen 3. The Gen 2 server has a failed motherboard DT021, and a lot of important data. The Gen 3 box is currently unused. It has a DP246 motherboard. My ...
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1answer
60 views

Mounting device from degraded RAID 1

I am trying to mount device form raid 1 (created on other device), because I need to copy data from this disk. When I am trying to assemble new array i get a message: foo@bar# mdadm -A -R -v ...
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1answer
238 views

RAID rebuilding seems to have stopped

My server was running a RAID 1 array with two disks. One of those disk failed today and was replaced. I've copied the GPT partition to the new hard disk (sda) with: sgdisk -R /dev/sda /dev/sdb ...
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I can't seem to get a drive to boot off my RAID controller after cloning it

I don't know if this is normal but here's what I'm doing. I have a LSI 9650SE-ML12 RAID card, and I was running 2 drives on it in raid 1. I used Paragon HDD Manager to create a VD back up of the ...
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1answer
29 views

Abstract physical drives to create a resizable raid array: is it possible?

I want to set up two hard drives with a portion of them set in raid1. I want that portion to be scalable too, as logical LVM volumes are. Is it possible to abstract physical volumes or to create an ...
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74 views

How can I force soft raid to read only from one disk?

I have quite a large IO wait showing in top. I suspect this is fault of SDA drive (on of 2 disks in RAID array), which was replaced about week ago. There are no errors visible, smart showing nothing, ...
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78 views

RAID 10: Does it impact performance if I have 24 small drives in Raid10 vs. 4 larger drives?

Does it impact performance if I have 24 small drives in Raid10 vs. 4 larger drives? The root of the question is does it have any performance or redundancy benefit if I fill out all 24 of my bays with ...
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53 views

added new drives to raid 5 with wrong format then removed them and broke raid 5

thanks in advance for any help. In summary: I added 3 new disks to raid 5 array. Then, thinking they were not added, I removed them. Now the array doesnt work. What can I do to get back the ...
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2answers
138 views

Windows Tool to read S.M.A.R.T. attributes on SATA drive in HP D2700 Enclosure using P812 Controller

I've got two HP DL380 G7 servers + P812 controller + D2700 enclosure. They're database servers with 144 Gb RAM. P812 firmware is 6.40, D2700 is at 0147 They both worked great with 18 OWC Mercury ...
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2answers
139 views

Would software RAID0'ing SSDs help or hinder maximization of useful CPU work throughput?

My question is in the title... here is some background: [OS is Linux.] [UPDATE: The contents of this RAID0 is redundant (sync'd from SCM). I am not worried about the increased risk of data loss.] ...
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71 views

LSI Megaraid alarm - clearing hotspare

I have several Supermicro servers with LSI Megaraid controllers, 9266-8i. One recently lost a drive; I replaced it as usual, but it is still beeping on reboot. It is set up as RAID 10 + hotspare. ...