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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57 views

Why is my HDD partition a character special device?

I have a bunch of old 1T disks with an mdadm array on them. They had been out of commission for awhile, but yesterday I slotted them into a server running an up to date Debian Jessie. Eventually I ...
2
votes
2answers
24 views

ext. 2-bay USB-Drive with RAID: btrfs RAID vs built-in RAID

For backups I want to use an external USB3 Drive: two HDD with RAID 1 (mirror) in one 2-bay enclosure. As filesystem I'll use btrfs because of subvolumes and checksums. Performance isn't important, ...
0
votes
1answer
915 views

Adaptec 5405 fails to rebuild array

Yesterday one of the disks in RAID 1 mirror attached to Adaptec 5405 died and was replaced by new one but after about 2 hours of rebuilding array went offline. Hoster staff updated firmware on ...
3
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1answer
1k 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 ...
0
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1answer
2k views

How to install Windows 2012 on Dell server with S110 RAID?

I have a Dell server that has a S110 software RAID 1 mirror for the boot disks. When I run the Windows 2012 installer, no drives are found. I searched Dell for drivers but the only one I found for ...
0
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0answers
14 views

How can I find out my centos RAID setup, with a LSI MegaRAID SAS 2108 controller?

I've bought an auction box from Hetzner which allegedly has 4 3TB drives in it. As a relative newb to this sort of thing I just want to see some reassurances on the command line that this is all ...
2
votes
1answer
2k views

Setting up a bootable multi-device (RAID 1) using Linux Software RAID

I'm trying to setup a bootable software RAID that will contain the root filesystem and boot up Linux Mint Qiana. It will be used to run a few graphical monitoring applications in a small datacenter, ...
0
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0answers
38 views

Server reverted to may after reboot

I just had a problem on a client's server, it wasn't responding to anything so I forced a reboot. The client called shortly after to say the website reverted to a version from May. Checked the backups ...
0
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2answers
32 views

Detection of consumer SSDs by enterprise disk controller in non-RAID configuration [closed]

We (a client) are considering [insisting on] using consumer grade SSDs (to keep the cost down) in some Dell R710 and HP Proliant D380 G5 servers. I've looked about and people report the P400 cards ...
0
votes
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 ...
0
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0answers
22 views

How to repair multiply-claimed blocks?

I get a lot of the following logs in dmesg: [26159.277230] EXT4-fs error (device sdb1): ext4_iget:3875: inode #394497188: comm mv: bad extended attribute block 22794025699896 [26219.914802] EXT4-fs ...
0
votes
1answer
1k views

synology “disk groups” vs “volumes” clarification

Synology has introduced some interesting terminology with their products that is confusing (to someone used to traditional storage terminology). It appears that "volumes" on Synology is equivalent ...
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vote
3answers
433 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 ...
0
votes
0answers
23 views

ZFS - Reconnecting a disconnected but fully intact disk

If a disk gets disconnected from a ZFS array, but the drive itself if totally fine, what happens when you reconnect it? For example, if I have a mirror of 2 drives, if one is disconnected, then ...
2
votes
1answer
1k 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 ...
23
votes
5answers
17k views

How do I differentiate “fake RAID” from real RAID?

The Ubuntu wiki page on FakeRaid says the following: [A] number of hardware products ... claim to be IDE or SATA RAID controllers... Virtually none of these are true hardware RAID ...
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0answers
26 views

which RAID system is best for my specific office use? [duplicate]

So currently we are using a program called AgVance which is similar to Quickbooks, that is currently being hosted by another company, which is costing us quite a bit. We wanted to see if we can host ...
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votes
2answers
5k views

Dell Power Edge R515 - Replacing a Bad Hard Drive in a RAID

I've ordered a new hard drive to replace a bad one in a Dell Power Edge R515. The manual covers obvious topics regarding physical replacing of hard drives, but I've never done this before on a ...
1
vote
1answer
26 views

Super Micro Model 827-16 -> CentOS 6 RAID Controller driver

I have a Super Micro model 827-16 (part no: 6027TR-HTRF+) and need to get CentOS 6 installed. The problem is that I haven't been able to confirm if there are CentOS specific/supported RAID drivers ...
0
votes
1answer
63 views

Windows Server 2008 RAID setup

I have a relatively old Windows Server 2008 machine that I am upgrading the disk space on. The disk hardware I am upgrading to is: 2TB WD - WD20EARX 2TB Seagate - ST2000DM001 1TB Seagate - ...
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votes
1answer
31 views

Recovery from multiple disk failure using RAID level-6 [closed]

How to find a RAID level 6 scheme with ten disks such that it is possible to recover from the failure of any three disks simultaneously? Actually the question is from the book: Database System ...
0
votes
2answers
2k 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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votes
2answers
2k 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 ...
2
votes
2answers
6k 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 ...
0
votes
1answer
1k views

LSI MegaRAID - Recreate missing RAID 1 array

I have an LSI MegaRAID SAS 9260-4i Controller with two drives attached to it with a simple RAID1 array (virtual drive). One of the disks failed (complete disappeared from the system) so I asked the ...
0
votes
0answers
27 views

How much usable space will a 2TB+2TB+3TB+3TB btrfs filesystem have with data in RAID-1 mode?

I have a pair of 3TB drives in a btrfs filesystem, and I wish to expand this filesystem by adding two more 2TB drives, using the btrfs device add command. Data in the current filesystem is mirrored in ...
0
votes
1answer
430 views

RAID Card Event Notifications Email to Gmail

I need to get email for event notifications from our RocketRaid 2782. The problem is I don't see a way to get it to send mail to our google apps gmail account. I don't think the card offers ...
0
votes
1answer
60 views

RAID1: approx performance difference of 3 active vs. 2 + spare?

My question concerns only Linux software RAID ("md"). I'm going to set up a RAID1 array with three devices. I need to choose between using the third disk as a spare or as an active member of the ...
3
votes
1answer
1k views

flashcache with mdadm and LVM

I am having trouble setting up flashcache on a system with LVM and mdadm, I suspect I am either just missing an obvious step or getting some mapping wrong and hoped someone could point me in the right ...
2
votes
0answers
17 views

load balancing in multiple hardware raid arrays - soft raid 0 acceptable?

We have a central storage server (PowerEdge R720) serving shared files to an HPC cluster, and it has two hardware RAID controllers attached (PERC H810, each driving 2 MD1200 enclosures filled with ...
2
votes
5answers
4k views

What is a single drive RAID 0 array?

My understanding of RAID 0 is that the data is split and striped across all of the drives in the array. If there is only one drive in the array, then what is the point of a single drive RAID 0 array ...
4
votes
1answer
1k views

Resize openSUSE 12.3 GPT ext4 partitions in a RAID1 disk array

I have a software raid configured (/dev/md2) which has assigned the partitions sda3 and sdb3 from two 3TB disks (sda and sdb). The partition types are GPT not LVM and file system is ext4. Now, the ...
0
votes
1answer
82 views

OpenZFS on OSX filesystem dataset performance issue

tl;dr - My ZFS RAIDZ2 array reads at 7.5+ GB/s and writes at 2.0+ GB/s when I specify a bs=128K or greater with dd. OS X is assuming 1K (as per stat -f %k .) and all my is ~300MB/s; dd gives the same ...
2
votes
1answer
2k views

IBM ServerRaid lost Raid-5 configuration

I have an IBM server x3400 with 8 drives divided into two arrays. After reboot, ServerRaid lost the configuration of the Raid-5 array. The 6 drives that used to be part of this array are there, but it ...
0
votes
1answer
53 views

SATA Hard disk on RAID controller does not show on windows, and healthy on BIOS

We have a WIN2012 R2 server (3 x SSD 1T each, 1 x SATA 2TB), each drive is being put on it's own RAID (reads 4 "Adaptec Array SCSI Disk Device) on device manager in windows "disk drives" section ...
0
votes
2answers
3k 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 ...
24
votes
3answers
11k views

Should I defrag my RAID volumes?

It seems to me that since RAID volumes are logical (as opposed to physical), the layout that the OS believes they have might not correspond to the actual phsyical layout. So does defrag make sense ...
0
votes
0answers
26 views

Write cache settings not working

I am using Debian 8.0 x64 with 72 GB of RAM with 4 drives configured as software RAID 0. Linux s1 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1 (2015-05-24) x86_64 GNU/Linux I tried setting dirty ...
-1
votes
1answer
980 views

RAID1 on existing CentOS6 Install

I have two 500GB hard drives in my server. Currently, there is no RAID configured, but CentOS6 is installed (as a bare install for now). Is it possible to set up a software RAID-1 so that both drives ...
4
votes
1answer
2k views

How to get email alert if one of raid 1 disks fails?

I need to know how can I get email alert if one of raid 1 disks fail to work/crashes. I have CentOS 6.4 64bits, software raid. I did some mistake folowing this tutorial, because it was a bottom note ...
5
votes
2answers
802 views

Sata Card for OpenSolaris, no raid needed

can anyone recommend a Sata pci or pci-e card that is compatible with OpenSolaris? Raid isn't necessary as aim is to use ZFS. I ended up getting: - Intel sasuc8i (based on LSI 1068) - Dell 5/i SAS ...
3
votes
1answer
193 views

Mixing SATA speed on hardware RAID

I have a 16 drive hardware RAID array which has 15/16 3 Gb/S SATA drives. On replacing a failing drive I realized the replacement was a 6 GB/S drive (same brand/cache,size though). Is this likely to ...
1
vote
1answer
42 views

How can I get my Dell R300's PERC 5e RAID Controller Back Online?

Intro/Problem Hi everyone, I am in over my head here. I have a Dell R300 server running Windows Server 2003. It went down late last night and upon trying to restart it, I got the following Errors ...
3
votes
1answer
78 views

HP B120i RAID0 very slow to read data from disks

I have a HP DL320e g8 v2 server running CentOS 7.1 (kernel 3.10.0-229.4.2.el7.x86_64). This server comes with a B120i onboard SmartArray controller, and it was configured with two identical 3TB ...
2
votes
1answer
58 views

Mounting degraded RAID

I've finally managed to assemble my RAID10 array again. I'm hoping there might now be a way through this. (There is history, if anyone is interested). I'm now getting: # cat /proc/mdstat ...
1
vote
1answer
30 views

SSDs with the Intel RMS25CB080

I've bought a new server which only allows disks to be connected to a built-in Intel RMS25CB080 RAID controller card. The server has 8 2.5" slots. I'm considering using SSDs with this server, however ...
0
votes
1answer
77 views

CentOS 6.5 Installation in HP Proliant DL80 Gen 9

I have created 2 Logical Disks, 1 with RAID 0(1.8 TB) another with RAID 1+0(5.4 TB). I have to install CentOS 6.5 in the server, but while installing the OS, I cannot detect any logical disks to ...
0
votes
2answers
101 views

mdadm, RAID5 all disks marked as spare, won't start

RAID5 config with mdadm and 4 disks After some incidents, eg one of the drives was lost, had to reboot the server and rebuild the array, my raid is in a funny situation cat /proc/mdstat ...
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0answers
21 views

Mirror Raid to Single Harddisk ACPI BIOS in the system is not fully compliant with the ACPI [migrated]

My server used to be setup as a Mirror which means the 2nd harddisk would take the image of 1st harddisk. In anycase 1st harddisk is dead, 2nd harddisk would take over. It wasn't setup by me & ...
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3answers
123 views

Hard disk / SSDs - detection and handling of errors - is silent data corruption reliably prevented?

When an error occurs on a drive, is it correct to assume that it will always be detected and reported to the OS (if software RAID such as mdadm) or RAID controller (if hardware RAID) as a failed read ...