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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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 ...
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2answers
2k views

grub always will boot to grub command line

I have a remote CentOS 6.4 server (with KVM access), when I received the server it was running with LVM on single disk (sda) I managed to remove LVM and install raid 1 in sda and sdb disks the ...
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2answers
586 views

M1015 pass-through and hot-swap in Linux with md raid (IBM x3620)

I'm setting up a small, but hopefully durable server for a student community, and the hardware is an IBM x3620 M3 with a builtin M1015 RAID card. To make the setup future proof and avoid vendor lock-...
2
votes
1answer
59 views

5 dead hard drives in a span of 2 months - what should I be checking?

So we got a nice new HP DL380 server with a fancy RAID card about one year ago. 2 months ago a hard drive failed. Thank goodness for RAID5... except that the RAID card only sort of worked and the ...
2
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2answers
4k views

HP P410 RAID CARD Issue - unassigned drives not detected by the OS

i just bought lot of HP DL180 G6 Servers, it's using HP P410 RAID Card, i plugged 12 x 2TB SAS Drives + 2 x 73GB SAS (for OS - RAID1) all drives showing up IN RAID Creating array page, so i just ...
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1answer
118 views

Debian Software raid not getting synced

my Software-Raid under Debian suddenly says: Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md2 : active raid1 sda3[0](F) sdb3[1] 2917156159 blocks super 1.2 [2/1] [_U] md1 : ...
2
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1answer
524 views

HP Smart Array E200i controller

Can HP Smart Array E200i 128MB RAID controller wotk without Posted-Write Cache moduler? It's battery have finished its life.
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2answers
282 views

HP P800 PCI controller disables(!) HP 410i internal controller

I have a HP DL360 G6 server with a very strange RAID controller behavior. I installed a P800 PCI RAID Controller card and all of the sudden I cannot access my hard drives that are connected to the ...
0
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1answer
2k views

RAID Recovery on a QNAP TS-869U-RP

I've had my trusty QNAP NAS (T869-RU) fail on me over night with (apparently) two of the eight disks in the RAID5 MDADM array from /proc/mdstat: [/etc] # cat /proc/mdstat Personalities : [linear] [...
0
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1answer
396 views

How to address a recurring low temperature error seen at every boot-up?

After updating to latest controller firmware, I started receiving the following error messages: LSI 2208 ROC: Temperature sensor below error threshold on enclosure 1 Sensors 5 thru 7 Is this ...
0
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1answer
176 views

Installing Raid 1 on Ubuntu 13.04

I am trying to install raid 1 on my new ubuntu server using software raid. My drives are 2 x 3TB I have set the format of the drives to gpt. Created 3 partitions (1mb - grub) (2gb swap) and the ...
0
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1answer
254 views

AOC-LPZCR2 Equivalent RAID card

We have just had a 'AOC-LPZCR2 Low-Profile All-in-One Zero-Channel RAID card' fail. Unfortunately, we are unable to source one straight away. Does anyone know of an equivalent card which we could use ...
0
votes
1answer
424 views

PCIe SSD vs SSD vs SAS - which is best for Database?

Since I am going on shipping soon I wonder which generally will mostly boost the database performance ? The bridge question is - which will boost mostly a database which having a lot of random block ...
0
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1answer
1k views

Installing Adaptec 5405 RAID card HDD LED

I'm trying to install an Adaptec 5405 RAID card into an Intel 1RU server, and I need to figure out how to connect the existing SGPIO connector from the backplane, onto the card itself (at least I ...
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2answers
7k views

How to use SAS Expander with RAID card?

I've doing some researches since few days and I haven't really got an answer to my question. I am in the process of building a huge file server for the company I work for. We bought a server case ...
0
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3answers
291 views

Best raid configuration for my sql Server 2005

I have SQL SERVER 2005 database running on windows server 2008 with following configuration SERVER:HP Proliant ML380 G7 CPU: 1 RAM: 10 GB of RAM HHD: 3*300 GB HHDs with RAID 5 configuration. It has ...
2
votes
1answer
2k views

How do I check if smartd and mdadm are running correctly?

I have a raid system on debian: Disk /dev/sda: 320.1 GB,... Device Boot Start End Blocks Id System /dev/sda1 * 1 2432 19535008+ fd Linux raid ...
1
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1answer
169 views

RAID 5 Array A00-01 is “optimal” but not showing when I boot from my RAID 1 Array A00-00 OS

This server was originally setup with RAID 1 mirrored drives for the C:\ primary partition where the Operating System was installed. And a RAID 5 array with 3 drives for the data partitions. The C: ...
2
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0answers
346 views

Convert single O/S disk to RAID 1 - Ubuntu 12.04 LTS

I have a server running Ubuntu 12.04 LTS with only a single drive. There are 2 more empty hot swap bays in the chassis. I want to add a little redundancy by adding a RAID 1 to the system. The ...
3
votes
1answer
3k 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 ...
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2answers
69 views

Server Upgrade and Data migration [closed]

Hello, I'm migrating a server here is the detail of both server, Copy from Location Current Server have 450GB of Data in home drive, which is critical and must be copied.Current Server have 7200RPM ...
0
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1answer
3k views

Manage Intel RAID in Windows

I have a box with Intel C600 Series Chipset SATA RAID Controller. Three RAID1 sets were configured at built time and Windows 2008 Server was installed on one of the RAID sets. The box has been ...
2
votes
1answer
757 views

RAID6 degraded drive during rebuild

Background and context I have a 3ware LSI RAID controller and a RAID6 setup over 16 physical disks. One of the HDDs died last night, and I replaced it with a brand new (identical) drive this morning. ...
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2answers
2k views

Reset Disk - Windows Storage Server 2012

I set up windows storage server 2012 and have 6 SATA drives in a raid configuration. Prior to production use I tested by removing drive and adding a spare and rebuilding. That went fine. Now I see ...
5
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1answer
705 views

how can I diagnose a “frozen” linux software raid device?

I have a server running Linux 3.2.12 32-bit i686 with 13 drives: 1 boot drive, and 3 raid5 devices of 4 drives each. /proc/mdstat shows Personalities : [raid1] [raid10] [raid6] [raid5] [raid4] md2 :...
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0answers
248 views

Half of disk space missing on RAID1, all disks it seems to be ok

Hi there. I have a problem with raid array. I miss it a half. My disks layout is 2 x 250 gigabytes velociraptors (Array_0000) 2 x 1TB velociraptors (Array_0001) ....both connected in RAID1. OS ...
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1answer
2k views

Resize partitions used in Debian software RAID 1 mirror

I have a simple RAID1 setup with a few drives. I've realised that one of the partitions is not aligned to a cylendar boundary and I'm concerned that this is a bad thing that will cause me grief at ...
0
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2answers
1k views

Duplicate partition table in (Debian) Linux

A disk failed in a software RAID array and I'm trying to replace it. I've done this before without a hitch but this time I'm getting an error when trying to duplicate the partition table. I'm using ...
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votes
2answers
569 views

RAID 10, 3 drives or 2 drives?

Drives are very cheap these days. Would it be worth it to increase the group size from 2 to 3. I found 1TB drives for $60. I feel as if the array is very vulnerable to failure in a 2 group setup ...
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vote
2answers
318 views

Adaptec raid 1 on ibm 206m

So I have an IBM xseries 206m. It was working fine and one day after a reboot I noticed something weird about the RAID. It has a RAID 1 configuration, after this reboot (windows updates), I saw two ...
3
votes
1answer
4k 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
445 views

What is the Mean Time to Failure (MTTF) of a RAID5?

Given the MTTF T of an individual drive (say, 100000 hours) and the average time r it takes the operator to replace a failed drive and the array-controller to rebuild the array (say, 10 hours), how ...
2
votes
1answer
2k views

Should I enable “Patrol Read” on SSD drives?

LSI, Intel and Dell RAID controllers (perhaps others) have a "Patrol Read" feature to try to spot when a drive is failing before it completely fails. LSI seems to disable patrol read on SSD by ...
0
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2answers
2k views

Safe recovery of a working RAID Array after OS drive failed

I'm working with a server that recently had two drives fail. Windows Server 2003 - Standard Array 0 (bootable) - two 35GB U320 drives in a striped set. Array 1 - two 35GB U320 drives in a striped ...
11
votes
1answer
7k views

Managing battery relearn cycles on LSI and similar RAID controllers

How do engineers deal with RAID controller battery "relearn" cycles? As noted in: What's a "battery relearn" on a LSI MegaRaid?, relearn cycle discharges the RAID controller battery (...
2
votes
2answers
189 views

Windows Server 2008 Software RAID with Different Size SSD's [closed]

I'm planning on buying an extra SSD to install into my server to do Software RAID1 in Windows Server 2008. At this moment I have a Crucial M4 64GB SSD which is running fine, I would like to add a ...
4
votes
2answers
7k views

S.M.A.R.T data from disks behind LSI MegaRAID Controller in ESXi 5.1

I was looking at ways to get S.M.A.R.T info and R/W stats from drives behind LSI MegaRAID controller (9260-4i) in ESXi 5.1. ESXi has a command "esxcli storage core device smart get" to get S.M.A.R.T ...
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2answers
131 views

Raid 10 data failure

If I have 16 drives in a RAID 10, how many drives would I have to drop to have data loss?
0
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1answer
1k views

IBM x3650 M1 SATA support up to 2 Tb

I have an IBM x3650 (M1 [i think because of DDR2 rams]), an as i know it only support SATA hard drvies only up to 1 Tb. Is there any RAID controller firmware/BIOS update which can give the server 2 ...
4
votes
1answer
1k views

Rebuild mdadm RAID5 array with fewer disks

I have a 4 disk RAID5 array, one of which is starting to fail according to smartd. However, since I'm using less than half the space on /dev/md0, I'd like to rebuild the array without the failing disk....
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vote
2answers
91 views

HP p400i - 512MB RAID Controller card

Anyone know if the HP p400i raid controller can support multiple arrays? Say if I wanted a raid 0 with 2x146GB drives, and 3x300GB drives in a raid 5, both on the same card? Also, is it possible to ...
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votes
2answers
306 views

What if Areca 1212 Raid card fails?

So I have a basic server: i5, 4GB ram, Areca 1212 Raid card, 1x sata 40GB HDD (for OS) connected to motherboard sata, 4x 2TB HDDs all configured into RAID5 (for /home data) connected to Areca Raid ...
0
votes
2answers
173 views

Build RAID 1 array (non-boot), apparently all data is gone?

The computer that this is occurring in, has a 40GB boot drive (Debian) and two non-boot drives. I have two identical 1.5TB drives (one partition on each), and one of them had data on it (other was ...
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0answers
811 views

Expand Raid 10 set on MegaRAID LSI 9261-8i

I have an existing Raid 10 drive with 8 drives. 4 in each span. I can't figure out how to expand the set by adding two more drives, one to each span. I'm using the MegaCLI command line tool. I ...
5
votes
1answer
2k views

How to recover data from Apple raid 0 drives from dead xserve?

Yesterday, I was given two 160GB hard drives that used to form a striped RAID in an Apple xserve. The xserve is completely non-functional, but the issue is unrelated to the hard drives and I don't ...
5
votes
1answer
712 views

Drives randomly dropping from RAID array

We have 3x 3TB WD Red drives configured in a RAID 5 on an HP P812 controller with the latest firmware on. However, drives keep being dropped randomly from the array upon reboots, though not always. ...
0
votes
1answer
590 views

RAID1 - Possible to recover failed drives?

PowerEdge 1850 has two physical hard drives, configured as RAID1. Accessing via DRAC 4/I I can see that both drives indicate Failed & Offline. However, the DRAC log indicates that both drives "de-...
2
votes
1answer
8k views

Installing Ubuntu 12.04 on HP Proliant DL380e with 1TB SAS Drive

I have an HP Proliant DL380e with a 1TB SAS Drive and I am trying to install ubuntu server 12.04 on it. I have created a RAID array using Array Controller Utility and had a RAID0 logical volume ...
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1answer
93 views

Removing and re-adding a raid drive

Lets say I remove a drive from a RAID array on a HA server for a period of time then re-add it. Is there a way to limit the rebuild to a diff of what has changed since it was pulled, or does it have ...
2
votes
1answer
514 views

Concerns of simultaneous failure of SSD Raid1

Since SSD's have a write limit requiring wear leveling one would assume that all things being equal 2 identical SSD drives would wear nearly identically if they mirror data writes. When one drive ...