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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Is it possible to configure a supermicro X7DBU based system, with ESB2, to see HDDs greater than 750GB?

I'm currently running a Supermicro 1U server, with a X7DBU motherboard. When I boot up into RAID utility, I can either use ESB2, or Adaptec. Either way, The 3TB HDD (SATA) I put into it, is read as a ...
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2answers
154 views

Why can't I recover a RAID1 disk which apparently has no errors?

For several years now we run a software RAID1 on a old Gentoo box with a custom Linux 2.6.31. The RAID consists of 2 harddisk with 4 partitions each. In the last years it happend about 3-4 times that ...
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1answer
26 views

Using Seagate 3TB drives with a Dell PERC 710 - do I have to worry about align and sector size?

I'm going to setup our new server with 8 3TB HDD from Seagate. They come, as far as I know, internally with 4K sectors. I've run this past weekend some burn-in tests on the disks, before setting them ...
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1answer
24 views

Is There Anyway to Undo a Quick Initialize from a Perc6/i VD?

I stupidly fast initialized an existing Raid 5 Array Virtual disk with 10 Virtual Machines after creating a new Raid 5 Array. The VDs switched order on the list of the Perc Controller. According to ...
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0answers
17 views

Removing Mdadm raid system and boot with a single disk

I have a linux system running a RAID 1 (MDADM) system. For virtualisation purpose, i need to remove this system of RAID and then boot again the machine with just the main hard disk. Now.. I am not ...
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0answers
30 views

smartctl error end_request: I/O error, dev sdb, sector

I have a Scientific Linux 6.5 server with a RAID with SSD disks. I see several error on dmesg file but there is no alert or errors provided by the utilities of the RAID controller (LSI controller). ...
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1answer
19 views

External bitmap concerns

I am considering adding an external bitmap to my mdadm RAID6. The benefits seem absolutely incredible in terms of rebuild time but I do have some concerns. I didn't plan for it so I don't have much ...
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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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2answers
23 views

Getting an LSI SAS1064e to recognise new drives

I have an IBM x3200 M3 server running SBS2011. This server has an LSI SAS1063e controller (the basic BR10il RAID controller that comes with that system). Already existing was a RAID1 array of two ...
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1answer
32 views

Partitioning SSD and HDD in Linux NAS

There is a computer with four 2.7 TB hard disks, under control of Intel Rapid Storage Technology. And one 120GB SSD. We need to use it to store some data that we are collecting and computing. I think ...
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0answers
14 views

MegaCli shows “Firmware state: Failed” on new HDD

Here is the part of -PDList -a0 result: Enclosure Device ID: 252 Slot Number: 4 Drive's position: DiskGroup: 0, Span: 0, Arm: 0 Enclosure position: N/A Device Id: 12 Sequence Number: 3 Media Error ...
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2answers
61 views

How to reliably and conveniently mirror 2 drives in hotswap hdd racks (likely without RAID1)?

I have the following situation: Need to store 1 original + 1 copy for data sets that are 1-2 TB in size Need to use consumer SATA drives, 1 for original, 1 for copy Need to store 50+ such data sets ...
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votes
1answer
132 views

mdadm raid10 or nfs performance issues?

I have a fresh mdadm RAID10 device which is healthy, built from 4 x 7200rpm SATA 3 drives: # cat /proc/mdstat Personalities : [raid10] [raid1] md2 : active raid10 sdc3[5] sda3[4] sdb3[1] sdd3[3] ...
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1answer
22 views

Mac Pro says RAID degraded but all drives showing green status

OSX 10.9 - RAID Utility says RAID array is degraded but all drives are showing green All started after error log Drive 3:5000c5004e189ddf missing - Previous drive status was inuse Now getting ...
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2answers
24 views

Unsupported Storage Connection Detected on HP DL380 Gen8

I'm hoping this is the right place to ask. I recently received a new HL DL380 Gen8 server, on which I want to install Server 2012 R2 via Intelligent Provisioning. According to the specifications, ...
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1answer
31 views

Intelligent Volume Management [on hold]

I'm looking for a software solution that could present a single disk volume to me that's backed by some sort of intelligent disk manager. In my ideal use case I'd be able to create the volume from ...
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1answer
112 views

Configuring RAID1 on HP Proliant Microserver N54L / Ubuntu 14.04.1 LTS [duplicate]

I've bought a N54L and fitted two 3GB drives. Keen to get set up with RAID1. BIOS: SATA controller mode set to "RAID" RAID Option ROM utility: both physical drives set up as one logical drive When ...
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0answers
19 views

Not able to configure my RAID Controller

I am not able to configure my RAID controller because there are no devices on "sas topology". 3x 500G SATA devices are connected by using a mini SAS --> SATA cable. What can I do? IT Firmware is ...
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1answer
38 views

Real Time Data Mirroring in Linux Servers

Which are the different techniques available for real time data mirroring / backup of full server to restore it from a entire system crash? Is it better to purchase a separate server for data ...
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1answer
43 views

Hdd for server, will it work? [closed]

i have a server : IBM System x3250 M3 its have 2 HDD slots, but currently only have 1 HDD, that is : HDD 500 TB Hotplug, sata, with part number 9CA154-176 i want to add one more HDD, but i only ...
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2answers
696 views

What does “single-bit ECC errors were detected on the RAID controller” mean?

I have a Dell T7600 with a Perc H710P RAID controller and 4 attached 3TB drives. Over the past few months the RAID controller has been intermittently reporting errors on boot: "no boot device found", ...
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1answer
187 views

mdadm Build legacy array with 512-byte chunk

I'm attempting to build an array using mdadm. The array has 512-byte (not kibibyte) sized stripes. Because mdadm accepts arguments to chunk in kibibytes, not in bytes, I have been unable to build ...
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4answers
282 views

Recover data from RAID0

Is it possible to recover data from a RAID0 hard drive when the other hard drive has failed?
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2answers
31 views

RAID card monitoring from Debian OS

We have a custom built Debain OS server with this raid card. Is there anything we can do from the OS side to monitor the raid virtual disks? A few weeks ago we had a raid degrade and did not know ...
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1answer
15 views

MDADM remove drive during recovery

I would like to know that can I remove a drive during a recovery process from a RAID1 array: What happend is that SDD had bad sectors, I removed it with mdadm --manage /dev/md0 --fail /dev/sdd1 ...
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1answer
45 views

First 500MB of RAID6 array is wiped, how to recover?

We have a RAID6 array with 12 disks on a 3ware 9650SE-12ML controller. An engineer of our server provider issued this command by mistake: sudo dd if=/dev/zero of=/dev/sde bs=1M count=500; sync; ...
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12answers
7k views

Which one is better for my CentOS? Hardware RAID using Dell PERC 6 or Software RAID? [closed]

I would like to setup RAID 0 for my Dell 2900 server. Which one is better, using hardware RAID (using installed Dell PERC 6 controller) or software RAID? The RAID 0 is for database.
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8answers
10k views

How to Monitor an Adaptec/Intel ICH10R RAID Controller (any SNMP notification options?)

SuperMicro's Super Doctor III is the software I was looking for. It is SuperMicro's equivalent of IBM's ServerGuide or Dell's OpenManage. Unfortunately, while it supports hardware monitoring and SNMP ...
0
votes
1answer
921 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
53 views

recovering a corrupt degraded btrfs RAID6, need to manually clear an inode

I have a btrfs RAID 6. I have lousy hard drives, one failed, and another failed during recovery. Now I am without parity and cannot rebuild--a third drive is throwing read errors on a few sectors. ...
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1answer
23 views

Checking disk status (Behind raid card) from bash

We have a SuperMicro server with LSI Raid Controller. Is there a way to get any kind of information related to disks on raid controller ?
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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
14 views

Adaptec 2820SA RAID 5 cannot rebuild

I have an 8 disk RAID-5 array in degraded state. One drive failed some time ago, I replaced it, and it rebuilt and all was fine (state of the logical drive became optimal). Now another disk has ...
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1answer
846 views

Replacing a failed and degraded virtual disk on Dell T110 II RAID 1 PERC S300

We have a Dell T110 II server, factory installed with Microsoft Windows Server 2012, Standard x64 Edition, running PERC S300 RAID Controller (1068E HBA). It came installed with RAID 1 on the 500GB ...
2
votes
1answer
47 views

Ubuntu Desktop 14 on PowerEdge doesn't boot on RAID

I have a Dell 1U PowerEdge 1950, and for some reason, we cannot install Ubuntu 14.04 64bit Desktop edition on it. I know what you're thinking... why are you installing desktop? I have asked the same ...
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2answers
105 views

Why is my RAID1 or RAID10 virtual drive (6 SSDs) not significantly faster than a single SSD?

I'm trying to figure out why the performance of a Virtual drive built from 12 SSDs is not really faster than a single SSD drive. The Server is a IBM x3650 M4, two Xeon E5-2643v2 130W 6C 3,5GHz. The ...
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0answers
45 views

Why would a raid 1 “break” on it's own?

So I went out to look at a video server the other day that had degraded raid issues. I've read about the various raid levels and how they are supposed to work, but the behavior I witnessed here has me ...
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1answer
42 views

Extract data from server without causing high disk IO

My current diagnosis is that there is a hardware fault, either related to the memory of the hardware RAID controller or something related to the extra juice the hard drives requires when running on ...
2
votes
1answer
79 views

Why isn't my RAID array rebuilding?

Got a notice last night that a drive failed on a server. Got in this morning to replace it, and we're getting the following. Controller config report for the array looks fine, with the unusual status ...
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2answers
27 views

Upgrade key not present?

I have a DELL PowerEdge R520. On boot, just after loading the RAID Controller, I get a weird message: "Upgrade Key Missing! An upgrade key was present on a previous power cycle, but it is not ...
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4answers
53k views

How to check if hardware RAID is configured?

I have several servers running Windows 2008 and Red Hat 5 that are capable of hardware RAID. How do I check that hardware RAID is configured?
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2answers
58 views

Should I partition a RAID or just create a file system on it? [duplicate]

Given a RAID 6 created from 6 drives /dev/md0 which should be used fully for data (no booting from it, root and swap are on a different drive), should I create one partition on that device and then ...
1
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2answers
243 views

One of my drives thinks that it is part of a raid array, if I delete the array (which is broken & empty) will I lose data?

I had a striped RAID array a long time ago. One of the drives failed and I just used the other drive as a stand alone disk. I have now switched my BIOS back to RAID mode and have created a RAID5 array ...
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1answer
44 views

Bandwidth with SAS expanders and RAID controllers

Having a RAID controller that has eight internal SATA3 lanes, you can get 6 Gb/s on all eight drives. What if I connect a 24 port SAS expander to an eight port RAID controller, do I still get max ...
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8answers
1k views

Deploy Xen

I would like to deploy Xen virtualization, however I definately not sure which way to go. Citrix Xen Server has (AFAIK) better managment tools, but does not provide software raid. Ubuntu / CentOS ...
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2answers
550 views

Will Intel RES2CV360 SAS Port Expander Work With Adaptec 6805 RAID Controller?

Have both the expander and the RAID controller. Hooked everything together according to the docs on-line, but no drivers are seen. Can't tell if this is just a compatibility issue, or perhaps a bad ...
2
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1answer
26 views

Will I lose current disk contents if I re-enable onboard RAID on a ProLiant DL320 G5 server?

I have this HP ProLiant DL320 G5, acting as a domain controller, running Windows Server 2008 R2. The server has 2 SATA disks, which were configured in a RAID 1 volume using the system's onboard RAID ...
2
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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 ...
2
votes
1answer
133 views

Unable to mount '/dev/sda'

My server has two 2 TB hard disk drives in soft RAID 1. I can't mount /dev/sda. Output of parted -l root@rescue:~# parted -l Model: ATA HGST HUS724020AL (scsi) Disk /dev/sda: 2000GB Sector size ...
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0answers
47 views

RAID bus controller: Intel Corporation 82801 SATA Controller

I have a build server with a soft raid controller and two 250GB drives running Ubuntu 12.04: # lspci ... 00:1f.2 RAID bus controller: Intel Corporation 82801 SATA Controller [RAID mode] ...