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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Repair windows server 2008 on dell poweredge t710

I realy have big problem my server could not boot I have an IMAGEBUCKUP but when I try to recover it from exterbnal storage that I have .it ask me for driver I real don't know which driver to use ...
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1answer
13 views

ServerRaid Manager SMTP authentication

I need to configure IBM ServerRaid Manager (9.30.21) mail alert, but in smtp server configuration form I must insert only smtp server with no authentication. How can I set a smtp server with ...
2
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1answer
50 views

btrfs increase raid capacity by replacing disks (and not adding disks!)

I'm very excited about the new features of btrfs and would like to start tesing it. Before I get started, I would like to ask if btrfs supports increasing raid capacity by replacing disks by bigger ...
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4answers
31k views

Trouble Installing Windows Server 2008 on Dell PowerEdge R720 w/ PERC H710 Mini

Just picked up a Dell PowerEdge R720. I created a virtual disk with the PERC H710 Mini BIOS Configuration Utility 4.03-0002 and configured it for RAID 1. When I then go to try to install Windows ...
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1answer
2k views

HP P410 “Parity Initialization Status: Initialization Failed” How to fix?

I'm using HP P410 raid card with BBU with 12 x 3TB drives on RAID50 After a power outage at the datacenter, the hpacucli shows this: Parity Initialization Status: Initialization Failed However, all ...
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1answer
30 views

Replacing all drives on an existing RAID 1 + RAID 5 setup - all at once or one at a time?

I'm looking at upgrading hard drives in a PowerEdge R720 and need a little guidance. Current configuration: OS: CentOS 6.5 Drives: 2 x 300gb drives (RAID 1) 4 x 600gb drives (RAID 5) I have 6 ...
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1answer
63 views

Linux mdraid RAID 6, disks drop out randomly every few days

I have some servers that run Debian 8 with 8x800GB SSD configured as RAID6. All disks are connected to a LSI-3008 flashed to IT mode. In each server I also have a 2-disk pair as RAID1 for the OS. ...
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1answer
43 views

xfs on lvm on hardware RAID: correct parameters?

I have 10 disks with 8 TB each in a hardware RAID6 (thus, 8 data disks + 2 parity). Following the answer of a very similar question, I hoped for an automatic detection of all necessary parameters. ...
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14 views

Backup Drives: Should I prefer more cache or a SAS interface?

Background: I am buying new drives for a backup server. I've found a good price on a WD RE drive that has a SAS interface but only 32MB of cache. I have to pay $40 more to get a SATA interface and ...
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1answer
13 views

RAID1 /proc/mdstat output - is the disk a spare or is it active

I recently created a raid1 out of 2 hard drives (8tb wd red). The content of /proc/mdstat is confusing to me. This is it: $ cat /proc/mdstat Personalities : [raid1] [linear] [multipath] [raid0] [...
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18 views

raid controller strip size on heavy I/O random read

What is the best strip size for raid controller contains heavy I/O (random read) with large files (most of them bigger than 500MB) as the article mentioned this like we should not use large strip ...
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1answer
22 views

Windows Server with RAID error message after power outage - not booting

Good afternoon, We had a power outage last week at one of our remote sites which brought down the entire server room. Most of the systems came back online after the outage was resolved, but we have ...
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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 ...
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4answers
2k 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 ...
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2answers
4k 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
26 views

How to stop resync and start rebuild on software raid (mdadm)?

I have RAID6 on 24 drives. The raid was setup with mdadm, so it is a software raid. One of the drives died and the server freezed due to that, so it had to be rebooted using Power Cycle (power off + ...
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2answers
1k 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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24 views

Proliant ML350p Gen8 Raid Extending

I am assisting in adding 2 more 480 GB SAS drives to a Proliant ML350p Gen8 RAID 5 that currently has 3 drives. I already know that in my setup, I need to restart the server, press F5 to go into the ...
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7answers
16k views

Is bit rot on hard drives a real problem? What can be done about it?

A friend is talking with me about the problem of bit rot - bits on drives randomly flipping, corrupting data. Incredibly rare, but with enough time it could be a problem, and it's impossible to detect....
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0answers
128 views

Suddenly slow RAID performance

We recently noticed our database queries have been taking much longer than usual to run. After some investigation, it looks like we're getting very slow disk reads. We've run into a similar problem ...
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1answer
1k views

LSI RAID not synchronizing

There is a HS22 Blade with RAID. I removed one of the mirrored disk, and used it for other, but now I'm inserting it back, but it doesn't sync from the working disk. cfggen shows the following: ...
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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 ...
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1answer
75 views

How do I safely add a missing partition to an existing RAID-1 setup?

My server had RAID-1 setup and a few days ago one drive failed. I replaced it and added it back to the array. The problem is that the 3TB drive had 2 partitions: root@s01 [~]# df -h Filesystem ...
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1answer
30 views

Software Raid + LVM + Virtual Machine: File Corruption after crash

At our startup, while trying to move our applications to a new server we ran into a hung up Ubuntu 16.04 at the new server, responding to pings but ssh hanging at debug1: Entering interactive ...
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0answers
25 views

Rebuilding VHD RAID array

We have a Dell PowerEdge R420 with a PERC H710 mini RAID controller card. The server has six physical disks split over two arrays; one RAID-1 array for the OS and one RAID-10 array for the data. This ...
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21 views

What part of the server has failed if a replaced RAID-1 drive is not being detected?

I had a drive (/dev/sdc) in a RAID-1 fail, it showed as "faulty" in mdadm so it was replaced. But then the new drive was not recognised or detected at all. I ran this command after the new drive (one ...
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1answer
22 views

How do I format and properly re-add a drive to a RAID-1 array?

I had a failed drive from a RAID-1 array (2 drives) replaced and now need to: Format it. Add it back to the array. My drives are like this: root@s01 [~]# df -h Filesystem Size Used ...
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2answers
25 views

Can PNY Enterprise SSDs work in Dell R710 with Perc H700?

To improve the performance of a Dell R710 running CentOS 7.2 and being used as a MongoDB server, I'd like to add SSDs. The PNY Enterprise SSDs (specifically the 240GB EP7011) seem reasonably priced. ...
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1answer
28 views

Has my RAID drive failed?

I checked the output of my server today and it said: root@s01 [~]# mdadm --detail /dev/md1 /dev/md1: Version : 1.1 Creation Time : Sat Jul 7 18:23:24 2012 Raid Level : raid1 ...
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1answer
41 views

Advice needed about RAID and partitioning new server

first of all i want to appolagize if i doublepost. Plese merge this with similar post. Thank you. Now about the situation and the system we are trying to build and want an advice from experienced ...
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2answers
77 views

Ibm V3700 SAN / Howto add additional disks in existing pool

We have IBM v3700 San Storage(300gb x 36 SAS HDD) connected to Four servers (windows 2008) via FC. Each server have few disks allocated in RAID5 mode. There are 8 unused (candidate) disks available ...
2
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3answers
87k views

How can I force HP Smart Array RAID controller to re-recognize drives?

I have an HP ProLiant DL180 G5 server with a Smart Array E200 RAID controller. The RAID controller is refusing to recognize inserted drives as an array. The story so far... This server (our file ...
4
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1answer
2k 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 ...
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0answers
130 views

How to reset Areca RAID card built-in SAS expander password?

I just bought used ARC-1882IX-12 card but the seller forgot password to the SAS expander. The web management worked well with default "0000" password. How to reset it ?
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0answers
34 views

RAID 5, 50 or 10 with HOT SPARE Possible…? [duplicate]

I want to go for a Larger storage capacity but getting confused to use RAID Level. As have to reach the required IOPS, still maintain reasonable redundancy and have at least 5TB of logical storage ...
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3answers
4k views

How to test disk latency on Linux?

Made an upgrade of RAID firmware and latency as it seems have increased. Could you please advise on the most accurate way to examine disk read and write latencies?
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1answer
32 views

What are the consequences of a hot-spare dying during an array rebuild?

We've experienced a failure of the hot-spare during reconstruction of a failed disk in a RAID5 array. As it seems, we actually lost some data over this, at least the storage bay is giving I/O read ...
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3answers
48 views

Replace faulty drive in Raid 10 using smaller drive?

I have a Raid 10 array with a faulty drive in a Qnap TS-809. The array contains the following drives: (I know it was a stupid idea to mix the drives in the first place) 1. 2TB WD Red --\ 2. 2TB WD ...
19
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3answers
6k views

RAID-6: better to replace two dead drives at the same time, or one at a time?

We have a 16-drive RAID-6 that has three problem drives. Two are already dead, and the third is giving SMART warnings. (Nevermind how it got in such a bad state.) Obviously we want to replace the ...
0
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2answers
72 views

No Filesystem after deleting RAID

So I had the /home partition in two disks in RAID1, one disk failed so the system booted with lots of errors about that. I didn't have another disk to replace the one that failed, so I wanted to ...
0
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1answer
25 views

How to stop Ubuntu keeping writing degraded RAID

I have a hardware RAID (Adaptec 5805, RAID 6 of eight 6TB drives) that recently constantly fails when I have lots of disk writes. I installed Ubuntu on a separate disk and the Ubuntu seems not able to ...
7
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6answers
12k views

Poor read performance on Dell Perc H200 RAID10 with (4) 1TB 7200rpm 64MB drives

I am seeing only 50MB/s reads: ensnare@box:~$ sudo hdparm -tT /dev/sda [sudo] password for ensnare: /dev/sda: Timing cached reads: 4592 MB in 2.00 seconds = 2296.48 MB/sec Timing buffered disk ...
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2answers
2k 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. ...
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5answers
16k views

Software RAID underneath ESXi datastore

I'm building an virtual environment for a small business. It is based around a single ESXi 5.1 host, which will host half a dozen or so VMs. I'm having some doubts regarding how to implement the ...
2
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1answer
1k views

IBM System x3650 M3 - how to expand RAID 10 array

I have RAID 10 array on my IBM System x3650 M3 server - four drives IBM 146GB 10K 6Gbps SAS 2.5". I bought four new drives (also 146GB 10K 6Gbps) because soon I may have problem with free space. Can ...
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4answers
5k 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 ...
4
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1answer
2k views

mdadm: hot remove failed for…

My RAID1 is degraded and I need to replace /dev/sdb. However, I could mark /dev/sdb5 (in /dev/md1) as failed and removed it, but I can't do the same with /dev/sdb1 (/dev/md0 which is mounted on /): ...
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1answer
40 views

Performance comparison of single RAID vs multiple filesystems

I'm trying to get maximum sequential disk throughput for an application on my Linux server. It has 7 SATA disks that I could put in one RAID0 or RAID5 using a hardware RAID controller (HP P420i). Or, ...
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3answers
898 views

SATA drive problems with two SIL RAID cards

I've just put a second SiI 3114 SATARaid card in my home server so that I could add another pair of SATA drives and increase my storage space. Annoyingly, it doesn't seem to work: [ 32.816030] ...
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1answer
53 views

Dell PowerEdge R720 not recognizing RAID card

We recently bought a PowerVault MD3420 and I sent Dell the specs of the server I was going to use to connect it to. They sent me a card made by LSI instead of a PERC card for controlling the RAID ...