RAID (redundant array of independent disks, originally redundant array of inexpensive disks[1][2]) is a storage technology that combines multiple disk drive components into a logical unit. Data is distributed across the drives in one of several ways called "RAID levels", depending on what level of ...

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Add Automatic hot spare to Windows raid5

Ive been searching all over and cant find anything on this subject. I have a Raid 5 configured in Server 2003 using 3 1.5Tb drives, I have a 4th drive I want to add as a hot spare and I would need to ...
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279 views

Intel RAID Controller Rebuild RAID 5 While Windows Running

We have a RAID 5 array (3 drives) one of which failed this morning. If we take that drive out the system can boot into Windows Server '03 fine. Problem being we don't have anywhere to go if another ...
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Problem with RAID5 (mdadm) - disk detached

Having these lines in /var/log/syslog Apr 18 16:53:05 Server kernel: [4487878.816036] ata4: EH in SWNCQ mode,QC:qc_active 0x1 sactive 0x1 Apr 18 16:53:05 Server kernel: [4487878.816058] ata4: ...
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133 views

Can I replace a failed RAID disk with a used spare?

I have a Dell PowerEdge 2650 with hardware Raid - two drives in Raid 1, four drives in Raid 5. Originally, all six drives were the same size, but a while back I upgraded the Raid 5 array and kept the ...
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217 views

How to recover from RAID 5

there are 5 disk-array. i've lost the data of one of them. How can i recover? I don't know where to start?
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HP DL380 RAID5 Mistake

I had drives fail in both logical drives on a server. When I replaced failed 146GB drive in Raid 5 array with four (4) 146GB drives. On reboot the Smart Array controller asked if I wanted to accept ...
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RAID 5 RECONSTRUCT with RAID Reconstructor

I have Dell Poweredge server 2600 with Raid 5 in 3 hard drive Scsi 36gb each, it was fail to boot sinc the third drive is offline. I attached Sata card adapter to Sata hard drive and install OS ...
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94 views

LSI Raid 5 with 2 disks “not synced”

I have a system with a LSI 1064e SAS raid. The system is not booting, and when I enter the raid configuration utility, It says, that has 2 disc "Not synced". I didn't find the option to resync them, ...
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Recovering Linux soft raid 5, disk stays as spare

I got disk failure on my Centos Linux soft raid 5 array (mdadm). I replaced one of the disk and started to rebuild the array. Next time I checked the status, the rebuild was failed. This is the ...
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170 views

Questions on increasing RAID 5 array

I'm kind of new to RAID and before I go about increasing the size of ours I would like to get some feedback on if I'm going about this the correct way. I have included as much information as I can ...
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381 views

Recovering RAID5 array after zeroing wrong superblock

I have a raid5 array on 4 disks, sda1, sdb1, sdd1 and sde1. sdd1 was removed but is a healthy drive. While attempting to re-add it, I accidentally zeroed out the superblock for sdb1. sdb1's data is ...
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555 views

Are ext4 RAID5 tuning options useful under LVM?

I'm setting up a system with a system with a mdadm RAID5 which is the sole PV for a VG which hosts 4 LVs. When I make the filesystem, would the mkfs.ext4 -E option be useful? Or is its effect not ...
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How to replace failed drive in RAID 5 array in HP DL380 G4 server

Sorry for not providing more information when I previously posted this question. More detail is provided below. Any feedback would be welcome. I have a HP DL380 G4 2U server which has 6 drive scsi ...
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683 views

What parameters to mdadm, to re-create md device with payload starting at 0x22000 position on backing storage?

I try to recover from mdadm raid disaster, which happened when moving from ubuntu server 10.04 to 12.04. I know the correct order of devices from dmesg log, but given this information, I still cannot ...
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Ubuntu RAID5 Software Raid inactive - unable to boot into Ubuntu from non-raid drive

I have a server with 6 disks in it, 5 of which are in a RAID5 array. I came home from work today to find that the landlord had been through the house with a sparky, and the power had been reset. Now, ...
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Adaptec 2020SA RAID controller Set up in RAID5, one drive went down, can I still get data?

I have 6 1tb drives in a RAID5. 1 drive went down. On the RAID was 2 virtual machines that I really need back up and running. The spare drive I have to put in the server is a 1.5tb drive, which ...
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204 views

Linux software RAID-5: failed drive doesn't degrade the array

I have a CentOS 6.0 install sitting in a Hyper-V VM. I'm trying out some of the software RAID features of Linux and I've got a RAID-5 array made up of virtual SCSI disks. Most of it works fine: if I ...
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136 views

Windows 2k3 server RAID 5

I've got a server at home running Windows 2003 Server. I use the server to house my media collection and backups from other PCs on my LAN. The server has 4 1TB drives along with a smaller system ...
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Recover data from PERC 6/i RAID5 array using software RAID

I have 4 hard drives from a RAID5 array from a Dell server that suffered physical damage to the PERC 6/i RAID controller card. The 4 disks themselves are undamaged and I've created 4 disk images ...
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633 views

RAID 5 heavy IO hard freezes Ubuntu: Why?

I have a software RAID 5 partition on LVM in Ubuntu (desktop, actually, but I'm using it as a server). I have been rsyncing a ton of data to it, and the computer was hard freezing, as in I needed to ...
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208 views

moving mdraid from failed Buffalo NAS

I've been tasked with restoring a RAID from a failed Buffalo NAS. the NAS box has failed, but our understanding at this point is that the drives are still functioning. I believe that Buffalo's NAS was ...
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4k views

How do I replace a disk marked as removed from a linux md raid-5 array?

I had some recent computer issues and somehow one of my disks ended up not being recognized in my array anymore. It identifies fine, and both smart and some other disk checking utils all say its fine, ...
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How to make partition, raid5 and filesystem on 6x2TB WDC-drives in Linux

I'm getting confused by this "Advanced Format" (4KB sectors) talk of bigger (2TB) drives - and I am wondering about how I would resolve this if I'm building a new software (mdadm) RAID-5 array. The ...
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151 views

How to recover from RAID 5 [duplicate]

Possible Duplicate: How to recover from RAID 5 there are 5 disk-array. i've lost the data of one of them. How can i recover?
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142 views

Overnight SQL Server Full Backup taking 4x longer, everything else slower, RAID problem?

Sql Server on Windows Server 2008: Overnight, fullbackups taking 7-10 hours instead of 1-3 transaction logs taking 4-5 minutes instead of 1 minute Query optimization taking 3x longer I'm feeling ...
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572 views

RAID Controller Acting Weird with a New Hard Drive

(Not sure on the model at the moment will update once I know) So we had a a RAID 5 that had two hard drives fail at the same time. Positions 0 and and 1 are labeled as "online". Positions 2 and 3 ...
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Recovering a RAID5 with 2 disks out of the array

I don't want to approach this in a trial-and-error manner as I know this is the best thing to do if I want to loose my data. I have a server with 4*2TB disks in RAID5 (yes I know it's not wise) on a ...
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32 views

Raid fault - Dell PowerEdge T11 II

The server is Dell PowerEdge T11 II PERC S100 Virtual Disk Management (Build: 2.0.0-0162) Disk 0 is set too Offline and gives message NOT SELECTABLE: Read error: There is small sound coming ...
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92 views

4 Disk - RAID(5) - 1 alleged faulty drive

I have a OWC Mercury Pro Elite Qx2. I have 4 4TB Hitachi drives setup on a RAID 5. One day, the red light came on indicating that my C drive has failed. I took it out, and put it on my docking ...
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Raid 5 verifying

Good day every one, i all ready read this RAID 5 detects write errors? I have raid 5 on "3 ware" controller i want to ask: - do i need run from time to time verify schedule or i can use only ...
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934 views

logical drives on HP Smart Array P800 not recognized after rebooting

We had a Smart Array P800 configuration working fine (RAID5). Physically, we have a disk enclosure (like this) connected with a Linux Server. Here is what happened: This server was accidentally ...
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307 views

syncing mdadm event count

I had a disk die in my level 5 RAID and before I could replace it, my RAID crapped out while I was copying some data onto it. Reading the RAID kernel wiki on RAID recovery I've tried forcing an ...
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109 views

Setup 1x RAID5 array with multiple LVs and differnt filesystems?

Centos 5.9 - 2.6.18-348.3.1.el5 i686 Raid5 - 4 Disks + 1 Spare (all WD RED 3TB) Does it make sence to create multiple LV within the same VP and configure them as differnt filesystems: Example: LV1: ...
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518 views

Proliant Server E200i Raid Controller does not see array

Help! My server was configured with 3 arrays: array 1 and 2 were each 136Gb raid 5 using the first 5 drives. 3 x 72Gb and 2 x 300Gb. Array 3 was 3 x 500Gb using drives 6 7 8 for 1Tb. I had a ...
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760 views

Proxmox and PXE boot

I have 10 rack servers, each has an 80 GB hard drive, and a Dell PowerVault with no hard drives. It is possible to take all these hard drives and put them in the PowerVault cluster, then boot proxmox ...
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78 views

Single drive LVM to RAID6 LVM

I cloned my entire LVM volume group from a single drive to a RAID5 array with 3 disks. The VG is formed by these logical volumes: root swap home ... and other volumes of some XEN virtual machines. ...
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119 views

Building hybrid RAID10 + RAID5 environment

I have the following configuration: simple video surveillance system (server 1: recording past 24h; server 2: recording past 30 days). I am primarily using the content on the 24h storage, while I ...
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384 views

RAID 5 has no READ speed advantage over single drive?

I have recently acquired an Intel SASMF8I raid card for my office. I have 5 x 1TB disks and have created two arrays, 3 x 1TB RAID-5 and 2 x 1TB RAID-1. The second drive is for sensitive/vital data and ...
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303 views

Can I do a Raid 5 with a SAS6i/R?

I have a PowerEdge 2970 server with a: SAS6i/R Integrated Controller for PowerEdge 2950/2970, x6 Backplane ...
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968 views

Is there a way to add a new drive to the windows software raid 5 volume? [duplicate]

Possible Duplicate: Expand Windows Server 2008 RAID 5 array Hello there! Is there any way to extend my Windows Server 2008 R2 software RAID5 volume by another drive or am I bound to recreate ...
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344 views

Software RAID setup questions [closed]

I would like to set up a server at home that will have several roles, but the primary and most critical role would be a file server. It will host family photos and videos among other things that I do ...
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4answers
17k views

Can I recover a RAID 5 array if two drives have failed?

I have a Dell 2600 with 6 drives configured in a RAID 5 on a PERC 4 controller. 2 drives failed at the same time, and according to what I know a RAID 5 is recoverable if 1 drive fails. I'm not sure if ...
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569 views

SATA I on 4x 2tb RAID5 array does it matter its 1.5gbs SATA I not 3.0gbs SATA II

Just installed 4 2tb Hitachi 5K3000 drives into a IBM x3500 7977 server. It's got a adaptec 8k serveraid card. Turns out it doesn't detect the drives as Sata II 3.0gbs. It only see's them as Sata I ...
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understanding RAID Level 5

Just wanted to clear my understanding on RAID 5, suppose we have 100 GB of data to be stored in SAN in RAID level 5, does the actual storage means 100 *5= 500 GB ?, or it is the 100 GB only which is ...
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How long should a RAID Reconfiguration take? (Adaptec 6805)

I'm experimenting with various RAID configurations of a new Adaptec 6805 (not the 'E' model) Attached are 8x Hitachi 5400RPM 2TB SATA 6Gb Drives using the miniSAS to SATA cables provided. I created ...
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231 views

Is mdadm RAID Toast?

I took all my drives out and put them onto a new cpu/mobo. (upgrading) I boot up and mdadm claims it can't boot my degraded RAID. /dev/sdb sudo mdadm --examine /dev/sdb /dev/sdb: ...
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404 views

Installing VMware vsphere 5 on multi raid array server

We recently bought a new server that came with 2 600GB disks in a Raid 1 and 5 2TB disks in a raid 5. Initially this was going run Windows Server 2008 R2, however, it was decided to now run VMware ...
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40 views

Is it possible to install OS during RAID scrubbing?

One of our servers crashed a few days ago. I had to recreate the RAID container with the remaining disks. Currently the system is running the scrubbing process (screenshot below). I would like to know ...
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1k views

Convert RAID 5 to RAID 10 without data loss

I have a Windows SBS 2011 server on a Dell R610 with RAID 5 configuration [3 disk]. Is there a way to convert it to RAID 10[4 or 6 disk] without losing anything or needing to re-install the whole OS ...
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42 views

Migrate unix-system to hardware RAID-5 possible?

At the moment, I have a Intel SR2500 with 5 disks running at home. 4 of the disks aren't used at the moment due to maintenance-reasons. Because it's an expeiment-laboratory-machine where I can try ...