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 can I reduce LSI raid array without data loss

I have a server with 8x SAS drives attached to hardware LSI RAID controller (MegaCli64) and all 8 drives are configured as single RAID 10 array. I now want to remove 2 drives and replace them with ...
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1answer
34 views

Command to check if RAID 1 or not? [on hold]

I am a newbie on Linux. I buy one new dedicate server and now checking my hardware from CENTOS console. Could you tell me how to check if my server has an RAID 1 configured? many thanks
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16 views

To write in mdadm.conf in initramfs prompt doesn"t not save changes after reboot

I made a mistake with my mdadm.conf with my debian backup server. I used this command : mdadm --detail --scan --verbose >> /etc/mdadm/mdadm.conf to add a raid5 (it works great). By using ...
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0answers
8 views

SunFire 100 RAID setup failed

I have a SunFire 1000 and I would like to define the RAID. When I try to delete everything I get the error that there is not enough space: # raidctl -C "0.0.0 0.1.0" -r 1 0 Creating RAID volume will ...
2
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1answer
29 views

Placement of OS and SQL files

we are in process of setting up our SQL server which is clustered across 2 HP DL380p servers using a HP P2000 for the shared storage with 2 raid 10 (8 disks) arrays and raid 1 mirror (2 disks). We ...
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1answer
23 views

3ware: Add a drive to a RAID unit

I have a 3ware RAID controller running a RAID-6. I manage the RAID via the tw_cli command line utility. So, one drive in the array failed, and I removed the faulty drive (p6) from the array, and ...
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0answers
26 views

mfks.ext3/4 on a loopback mounted file — raid1 deadlock? [closed]

I'm having a problem with creating filesystem on raid1 array. I'm operating on files instead of real drives. That's what I'm doing: creating 2 2GB files with dd attaching them to loop0 and ...
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1answer
22 views

SBS 2003 Raid restore with fresh install

I have a box running SBS 2003 with one hard drive for the os and another three in a raid 5 configuration [edit: using the build in SBS raid system] The os hard drive seems to have died, even trying ...
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4answers
368 views

Raid 1 across 3 partitions, what does it mean?

I see a server with this kind of configuration. What does it mean? # cat /proc/mdstat Personalities : [raid1] md0 : active raid1 sda1[0] sdc1[2] sdb1[1] 48827264 blocks super 1.0 [3/3] [UUU] ...
2
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1answer
35 views

NetApp RAID DP - and disk space of parity drives

I've been reading: http://community.netapp.com/t5/Tech-OnTap-Articles/Back-to-Basics-RAID-DP/ta-p/86123 That basically describes RAID-DP as diagonal parity raid. But there's one thing that's ...
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3answers
62 views

distributing tables over multiple harddrives

Is there a performance improvement when I distribute database tables over different harddrives? I need to access many different schemas at the same time and I was wondering if adding more harddrives ...
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1answer
48 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 ...
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2answers
40 views

RAID 1 fault “ Status Ready for Rebuild : Rebuild Percentage Complete 0%”

Our RAID 1 system partition failed on our Windows 2008 SBS (physical environment). We still have disc 1 running but the 2nd disc in the raid is a failure. To add to the complication, disc 1 has bad ...
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0answers
51 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, ...
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0answers
23 views

mdadm: can't remove broken drive from raid1

I have a ubuntu server Ubuntu 12.04.5 LTS (GNU/Linux 3.2.0-34-generic x86_64) that uses a software raid with 2 physical drives. Apparently, one drive is unresponsive, and I try to remove it from ...
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0answers
24 views

RAID controller shows 2 arrays using the same disks

We have a server with a 3ware RAID controller that went into read-only mode today due to an aborted ext4 journal. I checked the RAID status and found the following strange configuration: //host> ...
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1answer
27 views

Max Size of Disks Supported by Controller

I am interested in purchasing (second hand) a Dell Poweredge 2950 2nd Gen server. However, the specs say it has a max storage size of 4.5tb. I am wondering if this means just what is available to ...
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votes
3answers
90 views

Configuring RAID in HP Proliant ML350e Gen8 [closed]

We have purchased two stock HP ML350e Gen8 servers. Ubuntu 12.04 is to be installed in those. The stock, base unit have provision for 6 hard disks for creating RAID in which, one is filled with 500GB ...
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1answer
56 views

Disabling damaged RAID 1 to read from healthy HDD

One of the HDDs in my software RAID 1 on a dedicated server is damaged. The customer support is slow to respond. I would like to transfer all data I need to another server, but file access is ...
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0answers
26 views

Intel RAID 1 states changes during install FreeBSD 10

I working on my all servers with FreeBSD 7.x / 8.x on mainboards with Intel RAID 1. I tied to install FreeBSD 10 on machine with Intel Z97 chipset and RAID 1 (mirror). During install process, all RAID ...
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0answers
24 views

How to reinstall the configuration utility for perc h310?

I am using Dell perc h310 raid controller. To fix some firmware issue, I run the following command. > megarec -writesbr 0 sbrempty.bin > megarec -cleanflash 0 After that, I can no longer ...
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1answer
19 views

migrate from raid 5+1 (spare) to raid 50 without losing data on hp p420i smart array

i have a raid 5+1(spare) with 8 disk of 1TB each one. my controller is hp p420i. i want add to my server another new array 5+1(spare) with other new 8 disk to build one array in raid 50 whithout lose ...
2
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1answer
78 views

Is RAID50 OK for a fileserver?

We have a new storage array consisting of 24 x 600GB 10K SAS disks arriving next week, and I'm trying to decide how best to carve up the available space for our 3-node VMware vSphere cluster which ...
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0answers
46 views

RAID0 : best chunk size for fileserver with average 650KB files

I found out that my server(linux Ubuntu Server 14.04) has probably a to high chunk size for the RAID0, or atleast I think this is an performance issue... The current chunk size is 512K with 4 disk of ...
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1answer
31 views

Running RAID 6 with a smaller drive

It looks like one of my hard drives failed in our RAID 6 (4 x 2TB) configuration. Unfortunately, I only have immediate access to a 1TB drive. Would there be an issue with temporarily replacing the 2TB ...
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votes
2answers
47 views

off-site backup strategy for small local tower server

I am a computational biologist working for a small startup tasked with setting up a local implementation of a small tower server (if it matters, I'm looking into getting a PowerEdge T620 or similar) ...
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1answer
24 views

How to enable SAS-12 on LSI 9361 RAID controller

By default, this SAS-12 controller runs with SAS-12 SSDs at SAS-6 speeds. How to unlock SAS-12?
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1answer
16 views

9650SE-4LPML RAID Controller BIOs not showing HDDs

I've got a fresh server put together with a 9650SE-4LPML controller card in it with the intention of setting up RAID 1 with two 2TB HDDS. When I boot up and go into the RAID controller BIOs, the ...
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0answers
39 views

Slow ext4 read performance on 24-drive hardware RAID6

I have a RAID6 configuration spanned over 24 drives (12x directly attached to the RAID card, 12x via external SAS) running on an ARECA ARC-1880IX-12 (fw V1.51 2012-07-04). The RAID makes up one single ...
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1answer
14 views

MDADM - Raid 1 - Change a disk with a smaller one

I have a Ubuntu server with the operating system installed on a raid1 created with two 500GB devices. the second drive failed. I now how to replace it, but my goal now is to move the operating system ...
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0answers
16 views

BIOS ORCA Conflict

I have an HP raid controller that tries to run ORCA while the motherboard is running its BIOS startup sequence. When a drive is connected, the BIOS freezes and beeps sequentially. When F8 is pressed ...
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40 views

remote raid config/monitor with idrac enterprise?

I have two new machines t620 with both h710's and h800's (each connected to md1200's). iDRAC sees in the inventory the md1200 and h800 and the disks but the storage management section of idrac does ...
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votes
2answers
524 views

SATA 7.2K HD Suitable for File Server

Just discussing a new Server with a client and they are insisting on using two 3Tb 7.2K SATA Driver in RAID 1. I wanted to get them 5 15K SAS Drives in RAID 5. Can anyone tell me what the true speed ...
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2answers
53 views

Can I take a mirrored raid drive and use it in another machine

I have about a dozen low end servers of varying makes and models and most have mirrored raid. I'm a bit confused about whether after a disaster (that hasn't harmed the drives) can I can take a drive ...
2
votes
1answer
126 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 ...
3
votes
1answer
133 views

Is there any downtime when expanding a volume on an iSCSI setup using Synology Hybrid RAID?

The subject sums up the scenario. I believe the answer is there is no downtime but the system might simply be slower during the rebuild. Which is fine. But if there is downtime, how long? A small blip ...
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0answers
24 views

mdadm - unable to reconstruct the raid1

When restarting my server, it (sometimes) fails to reconstruct my RAID-1 array (2 disks). My server, a 10-year-old computer, often changes sda into sdb or sdc which seems to annoy mdadm. When it ...
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0answers
22 views

Resizing a software RAID remotely, no LVM, / partition

I have a server that has a software RAID without LVM. That is only mdadm. There are the partitions /dev/sda2 and /dev/sdb2 which form /dev/md2. There is also a lot of space after both /dev/sda2 and ...
0
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0answers
54 views

mdadm RAID0 array recovery

I have a Linux file server with two 12-disk MD1000 disk arrays attached to a RAID controller. Unfortunately, a power blip has caused a loss of configuration data on the RAID controller and it is now ...
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1answer
70 views

What to do when raid 0 errer: Following Arrays have missing required members and cannot be … Array#0-RAID-0 [closed]

here are the tried status: It is a raid 0 configuration and have 2 disks. When using IBM ServeRAID Configuration Utility, there are three options: 1. Array Configuration Utility : see below 2. ...
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1answer
37 views

lvm and hardware raid: hardware raid 5 and raid 1 in single volume group?

I have a system with pre configured hardware RAID. It has 2 disks in a RAID1 configuration. It has a further 6 disks in a RAID5 configuration. The 6 disk RAID5 is split (by the hardware) to look like ...
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votes
1answer
58 views

What is a good new server setup [closed]

Currently we have a server with several functions: domain controller, SQL server, WSUS server, file server, print server, exchange server, backup exec And in addition we still have an old server with ...
0
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1answer
37 views

Hot swapping RAID 1 from data center to office

We have a NAS in our data center that we use for backups and application data. It has the ability to have an external USB hard drive connected to it and all data can be backed up to that drive. Here ...
0
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1answer
47 views

Why I am the raid configuration tool is now allowing me to create RAID 10?

I have an older dell power edge 6800 server. I have upgraded it a bit and I want to utilize it. So I wadded some ram and some drives. it currently has 12 drives. 2 @ (146gb) 10 @ (300 gb) I ...
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2answers
1k 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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2answers
32 views

Adding second RAID controller to a motherboard with onboard RAID controller [closed]

One of our server ASUS M4N78AM motherboard that comes with an onboard RAID controller. We have already utilised it and are running out of space. Would it be possible to install an additional RAID ...
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votes
1answer
69 views

Find RAID controller under Linux [closed]

I have been trying to find the RAID controller for good purpose. I need to find the right driver that works with the RAID controller. I can assure you i have a raid system in my server, here is an ...
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0answers
36 views

mdadm reattached a failed drive all by itself

I have 2 drives setup in mdadm mirroring (3 partitions on each drive). Last week the second drive (sdb) dropped out of the array because of some I/O errors I am still investigating. After a server ...
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0answers
357 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
24 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 ...