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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12 views

Preseeded RAID partitioning seems wrong

I'm trying to preseed an installation of Debian on a system with 12 HDD. Each drive have : a 1M GPT partition a 300MB RAID 1 /boot a 20GB RAID 6 / remaining space on a RAID 6 /data partition It ...
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2answers
79 views

RAID consideration for 24 Disk Array

I have here a 24 Disk Array with 3.7 TB disks in it. What would be, performance wise a good configuration when using a RAID 6: RAID 6 over all 24 disks or should I use 2x12 disk RAID 6 and than a RAID ...
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1answer
18 views

Multi-Volume data storage without striping

I have a network storage server running Debian, containing multiple hard drives. These drives are all mounted into subdirectories of a samba-shared folder. All members of the network have full read ...
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1answer
23 views

When exactly does a RAID5 reconstruction happen?

Let's assume the following scenario: A RAID5 array consisting of 3 disks is happy and running One of the disks crashes We replace the broken disk with a spare one The system is up and running again ...
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2answers
52 views

Unreasonable performance expectations for RAID 0 performance?

This is my first time building a machine with a hardware RAID card. We bought a Dell T620 with the H710P RAID controller (1GB NV Cache), a 160GB Solid State Drive (SATA Read Intensive MLC 3Gbps), and ...
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0answers
185 views

Ubuntu Preseed Raid 1 with multiple partitions

I intend to create the following RAID 1: Partition Size Filesystem / 20GB ext4 /boot 500MB ext4 swap 2GB swap /backup 10GB ...
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0answers
45 views

RAID rebuilds and unrecoverable read errors [closed]

My employer recently bought an expensive storage system without having anybody who has enough experience with this kind of machine. Both producer and distributor of the system are somewhat unhelpful ...
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1answer
57 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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0answers
15 views

proxmox install on z87 using hardware raid

To whom it may respond to, We are trying to install Proxmox 3.2 on z87x-d3h gigabyte motherboard installed server. Centos 6 can detect my hardware raid ( intel rapidstorage ) but bootdisk created ...
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4answers
16k views

How do I create a RAID 1 on HP Proliant DL360 with P410i controller?

It seems there is only an option for: Raid 1+0 Raid 0 I got two Disk, and wish to do a mirror. What are the options for me? Thanks.
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0answers
30 views

Ubuntu 14.04 mdadm issues on boot

I have a 14.04 Ubuntu machine which has: 2 x SSD in RAID 1 (md0) 3 x Sata HDD in RAID 5 (md1) The machine is set to boot from the md0 device. This machine has been running fine for a month or so, ...
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3answers
854 views

Should I avoid putting two SSDs in a RAID1 configuration due to performance degradation?

I have a workstation system that will have two 64GB industrial SSDs, and the plan is to have both disks in a RAID1 configuration for redundancy which is set up in the kickstart. The system will be ...
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2answers
5k views

mdadm rebooted, array missing? can't assemble?

Not sure what is going on with my Array. I rebooted ubuntu 12.04.1 and got a error on startup that fstab couldn't mount the filesystem UUID I have for my mdadm array. After running a few commands a I ...
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0answers
21 views

Dell PowerEdge T110 II no boot device avaliabe

I have a Dell PowerEdge T110 II with two TB SAS disk in RAID1 (Hardware Raid - Perc 200) and there is an Ubuntu server on it. Today we work like everyday, but from one second to another, the database ...
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1answer
743 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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1answer
68 views

HP Smart Array P410 Stuck in Ready for Recovery 00.0%

We are using smart array disk controller P410 by HP on our supermicro server. Sadly of the HDDs in a RAID10 Array was damaged and we were forced to change that specific hard disk. After 3 days and ...
0
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1answer
22 views

Converting Non-Raid to Raid

I have a server that currently has one 1TB drive in it. I just bought a 1TB drive to put in Raid-1 with it. The server already has data on it, so my question is what do I have to do to make it a raid ...
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1answer
34 views

Server Raid Failure and Boot into Grub

My server failed and and was booting into grub rescue. Now it is saying it cant even find the OS. I went into bios and checked the drives, and none of them seem to have failed. In the system events ...
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1answer
4k views

mdadm and 4k sectors (advanced format)

There are numerous questions on Serverfault about aligning 4k sectors disks, but one thing is not really clear to me yet. I successfully aligned my RAID1+LVM. One of the things I did was use mdadm ...
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4answers
534 views

How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?

For a Dell R920 with 24 x 1.2TB disks (and 1TB RAM), I'm looking to set up a RAID 5 configuration for fast IO. The server will be used to host KVM VMs that will be reading/writing files of all sizes, ...
2
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2answers
566 views

A few questions about RAID-Z

I just got 3 one terabyte HDDs to put into my small NAS box. I plan on raiding these together with RAID-Z (ZFS, if I'm not mistaken). I've done a lot of research, but there doesn't seem to be very ...
2
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1answer
19 views

EPC mode on Seagate Constellation using Linux

I need to set EPC mode on Seagate Constellation disks connected to LSI 9690SA-4l controller. This is because the controller is not compatible with the disks unless the EPC mode is set – according to ...
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2answers
2k 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 ...
9
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3answers
10k views

How do I rename an mdadm raid array?

I have assembled a new raid array to replace an old one. However, this new array got assigned an automatic name of /dev/md127 and I want to rename it to /dev/md3, so that I don't have to change ...
10
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2answers
739 views

Why is my RAID1 read access slower than write access?

I have done some simple performance tests and it seems that reading from my RAID1 is slower than writing: root@dss0:~# for i in 1 2 3; do dd if=/dev/zero of=/dev/sda bs=1048576 count=131072; done ...
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1answer
16 views

mdadm array is active but is not listed

I am running Ubuntu Server 12.04. I did apt-get upgrade and received a warning from mdadm. update-initramfs: Generating /boot/initrd.img-3.11.0-24-generic W: mdadm: the array /dev/md3 with UUID ...
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1answer
670 views

How to get notified of mdadm RAID problems?

I am running Ubuntu 12.04 LTS. Yesterday I found a message in my mailbox saying that my server was shut down. I proceeded to reboot the system, but it didn't come up after many minutes, and I didn't ...
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1answer
1k views

How to create Raid 10 with megacli

I have OpenFiler storage server. Without installing Windows and MSM, I want to create raid10 array from disks 2 to 21. I have already successfully installed MegaCli to OpenFiler but I'm stuck in ...
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1answer
42 views

Data recovery from deleted raid array

Hello I deleted a raid 1 array on a hp b110i and I wanted to know if it is possible to recover the data. Also if Windows server was on the array that was deleted can it be recovered. Thanks
24
votes
5answers
2k views

Do I need to RAID Fusion-io cards?

Can I run reliably with a single Fusion-io card installed in a server, or do I need to deploy two cards in a software RAID setup? Fusion-io isn't very clear (almost misleading) on the topic when ...
1
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1answer
43 views

HP ML350 Gen8: error erasing disk cciss/c0d0 on PXE

I Have a ML350 Gen8, that on first PXE Boot, will ask me whether I am sure I want to erase raid controller cciss/c0d0 giving me an option of Yes | No. This only happens when the disks are brand new ...
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2answers
27 views

LSI MegaRaid live conversion from RAID 6 to RAID 0+1

I've currently got a lovely working server that has an LSI 9265-8i RAID card in it with 4x1TB RE4 drives, also running CacheCade Pro 2.0 with 2x180GB SSDs in RAID1. I currently have the main array ...
4
votes
2answers
285 views

What steps should I take to best attempt to recover a failed software raid5 setup?

My raid has failed, and I'm not sure what the best steps to take are in order to best attempt to recover it. I've got 4 drives in a raid5 configuration. It seems as if one has failed (sde1), but md ...
3
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1answer
52 views

Steady red light on 2 HP SAS drives in RAID 1

I have a HP ProLiant web server with two HP 300GB SAS SFF 2.5 inch drives (Model: HP 507127-B21). Both drives have a solid red light, however there is no indication within the management software that ...
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1answer
50 views

Fixing partition table after writing 0s to beginning

I have a sw raid10 setup like: /dev/sdX > partition /dev/sdX1 > raid md0 > lvm > fs. I'm an idiot, and wrote 4gb of 0s to /dev/md0 with dd dd if=/dev/zero of=/dev/md0 bs=4k count=1000000 ...
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vote
2answers
82 views

Will expanding my Synology Hybrid RAID delete the data on the initial disk?

As the title states, I currently have my Synology NAS with a single 4TB drive in it. I now wish to expand this with another 4TB drive. If I expand the volume (it's currently setup as SHR) will the ...
1
vote
1answer
14k views

Dell PowerEdge - Add new disk to an existing RAID 5 array

I have a Dell PowerEdge with a RAID 5 array of 3 disks, and I want to add a fourth disk to it to expand the capacity of the volume. I don't want to reinitialize the whole RAID 5, because I want to ...
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0answers
20 views

Why MegaCli always returns blank?

Similar to this question (MegaCLI always returns blank output) with some differences. I am using perc h710p raid controller on Dell Ubuntu box. I download 1.01.39_Linux_Cli.zip (according to ...
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votes
0answers
44 views

CentOS 6.5 hard disk not detected on ibm x 3650 7945 server

I tried to upgrade firmware and used BoMC to upgrade firmware, but the hard disk is not getting detected while installing CentOS 6.5. How should I get it detected, does it related to RAID ...
3
votes
1answer
1k views

How should I calculate IOPS for RAID50 & RAID60?

I'm investigating some 4TB database systems and I'm comparing differences between RAID-10 & RAID-50. I know how to calculate the IOPS for common RAID levels like RAID-1, RAID-5 & RAID-10. ...
2
votes
1answer
1k views

HP Dynamic Smart Array B120i ESXi performance issue

One of our small offices was in need of a small server to perform certain tasks. Because the noise and size an of a regular server i went with the HP ProLiant Microserver Gen8 G1610T. Witch i expected ...
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0answers
13 views

openSUSE encrypted root over RAID, given Yast doesn't support encrypted root?

This is for a fresh install of 13.1 I'll be making. Four drives in RAID10 need to be on the bottom. I'd rather the RAID be software, MD, rather than hardware, though I'd use hardware RAID if all else ...
0
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1answer
31 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
32 views

Read RAID disks on another RAID adapter

I have a server with a failed motherbord. The motherboard has an embeeded Adaptec RAID controler. The server has 3 SCSI disks in a software RAID5 array (so the RAID controller is used only as a SCSI ...
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4answers
13k views

How can I un-mark a partition as active?

Overview: I use a backup storage enclosure with 6 backup drives incrementally backup up and taken off-site. One day I noticed that the backup process was failing. I logged onto the server that is ...
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0answers
14 views

IBM x 3650 M4 - enable disk slots 4-7

I have a x3650 with a ServeRaid 5110 controller. I have six disks installed - first 3 as one RAID5 array, and I want to set the second 3 up as another RAID5 array. However, only slots 0-3 seem to be ...
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1answer
1k views

prevent filesystem from entering read-only mode

I have found that my server's filesystem is continuously entering read-only mode. There have been some issues with the raid1 array, but I have removed the bad disk from the array. However, it is ...
0
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1answer
148 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 ...
4
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1answer
5k views

1TB Seagate Barracuda ST31000528AS - Unexpected “Offline uncorrectable sectors”

I bought a 1TB Seagate Barracuda 7200.12 - ST31000528AS drive about 18 months ago because it had a 5-year warranty, and used it alongside a Samsung Spinpoint under Ubuntu Server as one half of a ...
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1answer
35 views

Adaptec configuration has changed - Why can't it show me what it sees before blindly “accept” or “reject”ing?

I work with Adaptec cards on a regular basis; 2405, 5405, 6405e, 6805, and a few others. I am dismayed by the BIOS' terseness and lack of any utility at all. I can set card setting toggles; but the ...